User manual SCUBAPRO-UWATEC REGULATOR

ENGLISH USER INSTRUCTION GUIDE FOR RECREATIONAL DIVING EQUIPMENT (GROUPE - BREATHING - REGULATORS) CONTENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Important regulations .......................................................... Terminology / Applications ............................................ Technical safety regulations ......................................... Model descriptions................................................................ Technical descriptions ........................................................ Technical specifications ................................................... Preparation for use .............................................................. Use of the equipment ........................................................ Procedures after use........................................................... Care and attention ............................................................... Maintenance ............................................................................. Inspection..................................................................................... Troubleshooting ...................................................................... Additional combinations .................................................... Accessories .............................................................................. I I I I I I I I I I I I I I I - 2 2 3 4 5 20 21 22 23 23 25 25 25 26 26 I-1 User Instructions for Breathing Regulators 1. IMPORTANT REGULATIONS WARNING: SCUBA complying with EN 250 are not intended for more than one user to breath at the same time. If the SCUBA are used by more than one diver at the same time, then the cold water and breathing performance may not fulfil the requirements of EN 250. For your protection while using SCUBAPRO® life support equipment, we call your attention to the following: a. Any use of the equipment is conditional to reading, understanding, and following this user instruction guide. b. Use of the equipment is limited to those applications described in this guide and for purposes granted in writing from SCUBAPRO®. c. The equipment must be serviced annually (e.g. examined, serviced, and if required, repaired) by an authorized SCUBAPRO® repair technician. This maintenance must be documented (we suggest our SCUBAPRO® Log/Service Book). Only original SCUBAPRO® parts may be used for maintenance and repair. d. If the equipment is improperly serviced, or repaired by persons not trained by SCUBAPRO®, and in cases where the equipment is used for purposes not specifically designated; liability for the correct and safe function of the equipment transfers to the owner/user. e. instructions and statements contained in this document are based on the latest information available prior to printing. SCUBAPRO® reserves the right to make changes at any time. f. Local statutes and regulations must be followed when transporting this equipment. 2. TERMINOLOGY / APPLICATIONS SCUBAPRO® recreational diving equipment includes: self-contained, open circuit compressed air underwater breathing apparatus (i.e. SCUBA). SCUBA equipment allows a diver to breathe underwater by carrying a portable supply of regulated compressed air with him underwater. The purpose of a breathing regulator system is to reduce the pressure of the compressed air in the cylinder and supply breathable air to the diver upon demand. The system also provides outlets for underwater pressure gauges and intermediate pressure hoses for inflation of buoyancy control devices, dive suits, etc... NOTE: FOR SIMPLICITY, PRESSURE REGULATORS AND DEMAND VALVES ARE REFERRED TO AS "1st STAGE" AND "2nd STAGE" REGULATORS, RESPECTIVELY, THROUGHOUT THE REST OF THIS DOCUMENT. A breathing regulator system consists of: a first stage regulator coupled with one or more second stage regulators which have depth limitations. Any individual diving activitiy is limited by the experience and condition of the individual diver. SCUBA should not be used deeper than 50 meters (130 ft). EN250:2000 regulates the minimum requirements for recreational SCUBA equipment in Europe. SCUBAPRO® equipment conforms to EN250:2000. I-2 ENGLISH User Instructions for Breathing Regulators EN250:2000 requires that the minimum SCUBA unit consist of the following elements: · Compressed air cylinder(s) conforming to national regulations of the corresponding European Standard. · Breathing regulator: consisting of a first and second stage regulator set. · Face mask and mouthpiece, full face mask, or diving helmet. · Frame or holding device for air cylinder(s) with the possibility to mount the harness. · Carrying system. · Safety system, including at least one of the following: a. submersible pressure gauge, b. reserve valve, c. active low pressure warning device. · Instructions for use must be included. 3. TECHNICAL SAFETY REGULATIONS The recommendations and advice of a recognized recreational diving instructional agency should be followed on every dive. Before participating in any diving activity, a thorough course of instruction in the theory and practices involved in diving should be successfully completed. This user instruction guide does not replace a complete course of diving instruction! Prospective diving students should undergo and pass a diving medical examination prior to commencing instruction. Active divers should be re-examined as required by their physician. Air cylinders should by filled with quality compressed air only (in accordance with EN 12021). Poor quality air can cause corrosion to form in the cylinder as well as lead to regulator system icing and malfunction in low temperature environments. When transporting high pressure cylinder(s), national and local regulations for the transportation of dangerous goods (GGVS) should be observed. Regulations for using air cylinders is covered in the "use and handling of gasses" (TRG 402, para 4 and 5) and is described in other governmental regulations. Cold water diving regulator: SCUBA systems intended for use in temperatures below 10°C (50° F) must employ regulator sets proven for cold water diving. Required safety devices: In addition to those requirements detailed in "2 Terminology / Applications" SCUBA sets intended for use in certain exceptional operations conditions must meet additional criteria. · Whenever the amount of air remaining must be known (e.g. cave, cavern, wreck, current, or ice diving) a submersible pressure gauge (spg) is required. · Whenever the use of a spg is difficult or impossible (e.g. Iow visibility) a reserve valve or active warning device is required. I-3 User Instructions for Breathing Regulators 4. MODEL DESCRIPTIONS b j i d a d f c a c g h e b fig. 1 : MK25 DIN / S600 fig. 2 : MK2 Plus INT a. b. c. d. e. f. g. h. I. j. 1st Stage MK25 din retaining shaft with knurled retaining wheel Low pressure swivel ports High pressure port Inlet protector DIN / INT 2nd Stage S600 Purge button Bubble deflector Protective hose sleeve Low pressure hose a. 1st Stage MK2 Plus b. Retaining yoke and screw (Yoke system) c. Protective cap d. Inlet protector 4.1 Authorized SCUBAPRO® regulator "set". (some combinations may not be available in all countries). 2nd Stages 1st Stages X650T X650 S600T S600/ CLASSIC S600 S550 G250 HP D400 R290/ R380/ R390 R290/ R380/ R390 OCTOPUS R190 R190 OCTOPUS S555 R295/ R395 R295/ R395 OCTOPUS MK2 Plus INT/DIN MK17 A.F. INT/DIN MK16 INT/DIN MK18 INT/DIN MK25 A.F. INT/DIN MK20 NITROX MK25T INT/DIN MK25 SA INT/DIN MK11 INT/DIN X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X SCUBAPRO® 2nd stage octopus are provided standard with: · a yellow cover, · a 100 cm low pressure hose, and · an octopus holder. I-4 ENGLISH User Instructions for Breathing Regulators 5. TECHNICAL DESCRIPTIONS High quality material and engineering used in the manufacture of SCUBAPRO® regulators insure maximum reliability and safety. SCUBAPRO® has been building high quality diving equipment for over 35 years. All SCUBAPRO® regulator systems consist of two stages. The 2nd stage is a negative pressure activated, breathing controlled demand regulator. The 1st stage, connected to the cylinder valve, is intended to reduce the high pressure air supply (200-300 bar) down to an intermediate pressure of 9.5 bar (135 psi) over ambient pressure. The regulated pressure air is supplied to the 2nd stage via a low pressure hose. 5.1 A.F. and T.I.S. (ANTIFREEZE MK25's and THERMO INSULATING SYSTEM) (EU/USA patents) The above two systems for first stages regulator have to be installed by a qualified SCUBAPRO® service technician. They have been designed to provide resistance to freezing in accordance with European Norms (EN250:2000) for cold water performance at < 10°C (50°F) (ref. section 5.11.3). 5.2 Thread or Yoke Connections SCUBAPRO® first stage regulators are currently available with either of two different cylinder valve connections : · Threaded : this connector uses a knurled and threaded retaining wheel and complies with ISO 12209-2 (200 or 300 bar). · Yoke : this international connector consists of a yoke and knob type fixing screw for use in systems up to 230 bar and complies with ISO 12209-1. Cylinder connections can be exchanged by an authorized SCUBAPRO® repair technician. 5.3 Conical sintered filter The conical sintered filter has a 300% larger surface area than disc shaped filters. The filter traps rust and other large particles before their entering into the 1st stage regulator. 5.4 H.P. cave cone seat Designed and patented by SCUBAPRO®, the cave cone seat in the balanced piston first stages eliminates the annoying "whistling" common with other piston type 1st stages. (EU patent Nr 0.310.738). 5.5 Down-stream system "Down-stream" describes a valve that opens with air flow. With a down-stream system, the delivery valve in the 2nd stage opens automatically (like a safety valve) if the intermediate pressure supplied by the 1st stage increases above expected I-5 User Instructions for Breathing Regulators pressures. This approach insures that air is supplied to the diver should the 1st stage malfunctions and offers considerably lower inhalation resistance compared to an "up-stream" configuration. 5.6 Intermediate pressure hose In 1983 SCUBAPRO® developed an intermediate pressure "SuperFlow" hose that has a 33% higher air flow capacity for the same external diameter. The SuperFlow hose fits all SCUBAPRO® regulators, including those manufactured before 1983. 5.7 Mouthpiece The orthodontic mouthpiece is designed to fit perfectly in the mouth and adapt to teeth and gums achieving maximum comfort whilst securing the second stage firmly in place. 5.8 Full face mask Any SCUBAPRO® 2nd stage regulator, minus the mouthpiece, can be fitted to the SCUBAPRO® full face mask (p/n 24.150.000) by an authorized SCUBAPRO® repair technician. 5.9 Registration All SCUBAPRO® regulators are marked with a serial number (s/n). On the metal 2nd stages, the s/n can be found on the rear surface above the bubble deflector. On most plastic 2nd stage regulators, the s/n may be found on the rear face of the bubble deflector or on the mouthpiece surface. The D400 has the s/n on the side of the body. All 1st stage regulators display the s/n on the main body. 5.10 Silicone The diaphragm and air exhaust valve are manufactured from fine, highly sensitive silicone material. This extremely flexible material reduces the effort required for breathing during both inhalation and exhalation. 5.11 Compatibility Reverse compatibility; a company philosophy. New components are designed to be compatible with older versions of similar models. Even an old MK5 1st stage can be brought up to date with the latest components. 5.12 Worldwide Lifetime Guarantee SCUBAPRO® offers the original owner of all new breathing regulators a lifetime guarantee covering material and manufacturing defects for all components except mouthpieces and intermediate pressure hoses. Documented annual service and inspection by an authorized SCUBAPRO® repair technician is mandatory to maintain this Guarantee. 5.13 EN250:2000 Approval All SCUBAPRO® regulators exceed the strict requirements required by the European Standard EN250:2000. When fitted with a T.I.S./A.F. (antifreeze) kit, all SCUBAPRO® 1st stage regulators conform to the requirements for cold water conditions. I-6 ENGLISH User Instructions for Breathing Regulators 5.14 V.l.V.A. (Venturi lnitiated Vacuum Assist) Many SCUBAPRO® regulators are equipped with a diver-controlled V.I.V.A. Others have an internal V.I.V.A. or one that can be adjusted by an authorized SCUBAPRO® technician. V.l.V.A. (US Patent 4,796,618) allows the diver to finely control the inhaled air stream. This is possible by situating a flow vane in the mouth piece orifice. The angle of the vane controls the flow of air into the divers mouth. Adjusting the V.l.V.A. control lever on the outside of the 2nd stage can maximize the venturi effect of the breathing air stream. High speed air flowing over the vane produces a low pressure area behind it, pulling the diaphragm in and depressing the valve actuating lever and opening the inlet valve. Adjusting the Venturi effect (fig. 3): · Turn the lever to the MIN/PREDIVE position when entering water, during buddy breathing, or when using the 2nd stage as an alternative air source (Octopus) or when descending head-first. · Turn the lever to the MAX/DIVE position to achieve maximum air flow, during dive. fig. 3 5.15 1st Stage MK2 Plus (Standard Piston) T.I.S. Simplicity, reliability, and minimum servicing effort are the halimarks of the MK2 1st stage regulator. Being manufactured since 1963, it contains only one moving part: the piston. The small size and low weight are the major advantages of the MK2, yet it still offers four intermediate pressure ports and one high pressure port. It is T.I.S. compatible for cold water diving. Note: Designed for the maximum resistance to most conditions, a minimum of care and maintenance is recommended (see point 10. CARE AND ATTENTION). I-7 User Instructions for Breathing Regulators 5.16 1st Stage MK25T (Titanium) (Balanced) A.F./T.I.S. As for many other diving products, SCUBAPRO® had always been at the forefront of technology and materials. It was the first ever, for example, to introduce a first stage regulator fully made out of titanium as far back as 1988. This new model is thus the evolution of this brought to perfection, in which new technologies and ideas have been applied to the already legendary MK20 (now MK25). Titanium is a very unique material, which weighs half as much as brass (typical material used for first stage manufacturing) yet has superior mechanical and electrochemical properties. The latter allow the preformance and cosmetic appearance of the product to remain unchanged over time. In addition to the already exceptional performance characteristics of the base project, these are the new model features: - T.l.S. (Thermal Insulating System) (EU/USA patent) It consists of a soft and rigid sleeve combination around the 1st stage stainless steel piston to insulate the very cold through air flow from the water around, to prevent ice formation around the spring which is coated (fig. 4). The ice-breakers on the rigid bushing interrupt the ice formation, which tends to break off upon forming (patents no. EU 0.811.549 ­ no. USA 5.775.368) T.I.S. 2 version: a second soft sleeve has been added over the 1st one, to further improve the thermal insulation of the piston. - Composite Piston (C.P.) (Pat. pend.) (low pressure side made of technopolymer with double o-ring, HP shaft of stainless steel)(fig. 4). This solution improves the above T.I.S. function, to insulate air flow passing from the water around, especially where the air expands at most (inside the low pressure piston head) : the combination of the two solutions (C.P. and T.I.S.) allows to get the highest flow rate of any first stage (almost 10.000 l/min) with an extreme cold water resistance, thanks also to the new antifreeze cap (see below). - Antifreeze Cap (A.F.) (pat. pending) Its external ribs (fig. 5) almost make double the external thermal exchange surface in contact with water, still further delaying the ice formation, even below the EN 250:2000 cold test limit (2°C). - Rapid Intermediate Pressure Adjustment (pat.) (to be performed by Authorized Scubapro Technicians only) : the intermediate pressure can now be adjusted externally, and needn't disassemble the first stage. An adjustment screw made out of stainless steel (to avoid gripping between titanium parts) moves the high pressure seat axially. Rotation is hampered by an antifriction spacer. Given the superior mechanical resistance and imperviousness to all chemical and electrochemical agents of the materials employed, maintenance is reduced to a minimum and limited to only the sealing elements (o-rings, gaskets, seats, etc.)(refer to section 10, Care and Maintenance). I-8 ENGLISH User Instructions for Breathing Regulators 5.17 1st Stage MK25 - S.A. (Stainless Steel - Alloy) (Balanced) A.F./T.I.S. This version is the natural evolution of our UltraLight line, to which we have added new features and functions that eliminate the minimal usage defects encountered there, still keeping the minimum weight. It is a composite material regulator, which utilizes the optimum material for each function and location. All "static" components (cap, main body, etc.) are made out of a special aluminum alloy, anodized (refer to section 5.21). The other components, subjected during use to harsher conditions and/or dynamic loading and friction (swivel, yoke retainer, yoke screw, etc.) are made out of stainless steel. The latter are perfectly compatible with the alloy since they preserve, over time, their technical and esthetic properties : in order to prevent the alloy body in direct contact with the brass of the hose fitting, on one of the two HP ports, there is a stainless steel adapter to fit the said HP hose. In addition to the absolute low weight, the nice esthetics and to the already exceptional performance characteristics of the MK20 (now MK25), this new model features new and innovative technical solutions: - T.l.S. (Thermal Insulating System) (EU/USA patent) It consists of a soft and rigid sleeve combination around the 1st stage stainless steel piston to insulate the very cold through air flow from the water around, to prevent ice formation around the spring which is coated (fig. 4). The ice-breakers on the rigid bushing interrupt the ice formation, which tends to break off upon forming (patents no. EU 0.811.549 ­ no. USA 5.775.368) T.I.S. 2 version: a second soft sleeve has been added over the 1st one, to further improve the thermal insulation of the piston. - Composite Piston (C.P.) (Pat. pend.) (low pressure side made of technopolymer with double o-ring, HP shaft of stainless steel)(fig. 4). This solution improves the above T.I.S. function, to insulate air flow passing from the water around, especially where the air expands at most (inside the low pressure piston head) : the combination of the two solutions (C.P. and T.I.S.) allows to get the highest flow rate of any first stage (almost 10.000 l/min) with an extreme cold water resistance, thanks also to the new antifreeze cap (see below). - Antifreeze Cap (A.F.) (pat. pending) Its external ribs (fig. 5) almost make double the external thermal exchange surface in contact with water, still further delaying the ice formation, even below the EN 250/2000 cold test limit (2°C). - Rapid Intermediate Pressure Adjustment (pat.) (to be performed by Authorized SCUBAPRO® Technicians only) : the intermediate pressure can now be adjusted externally, and needn't disassemble the first stage. An adjustment screw made out of stainless steel (to avoid gripping between titanium parts) moves the high pressure seat axially. Rotation is hampered by an antifriction spacer. I-9 User Instructions for Breathing Regulators Given the superior mechanical resistance and imperviousness to all chemical and electrochemical agents of the materials employed, maintenance is reduced to a minimum and limited to only the sealing elements (o-rings, gaskets, seats, etc.)(refer to section 10, Care and Maintenance) fig. 4 T.I.S. AND COMPOSITE PISTON (C.P.) RIGID THERMOINSULATING SLEEVE W/ICE-BREAKER RIBS SOFT SLEEVE T.I.S. 2 L.P. AIR HP AIR STAINLESS STEEL PISTON SHAFT (C.P.) TECHNOPOLYMER PISTON HEAD (C.P.) THERMOINSULATED SPRING (COATED) (T.I.S.) SOFT SLEEVE T.I.S. fig. 5 I - 10 ENGLISH User Instructions for Breathing Regulators 5.18 1st Stage MK25 (Balanced) A.F./T.I.S. The MK25 1st stage comes straight from the legendary MK20, to which latest new concepts and technologies have been applied : - T.l.S. (Thermal Insulating System) (EU/USA patent) It consists of a soft and rigid sleeve combination around the 1st stage stainless steel piston to insulate the very cold through air flow from the water around, to prevent ice formation around the spring which is coated (fig. 4). The ice-breakers on the rigid bushing interrupt the ice formation, which tends to break off upon forming (patents no. EU 0.811.549 ­ no. USA 5.775.368) T.I.S. 2 version: a second soft sleeve has been added over the 1st one, to further improve the thermal insulation of the piston. - Composite Piston (C.P.) (Pat. pend.) (low pressure side made of technopolymer with double o-ring, HP shaft of stainless steel)(fig. 4). This solution improves the above T.I.S. function, to insulate air flow passing from the water around, especially where the air expands at most (inside the low pressure piston head) : the combination of the two solutions (C.P. and T.I.S.) allows to get the highest flow rate of any first stage (almost 10.000 l/min) with an extreme cold water resistance, thanks also to the new antifreeze cap (see below). - Antifreeze Cap (A.F.) (pat. pending) Its external ribs (fig. 5) almost make double the external thermal exchange surface in contact with water, still further delaying the ice formation, even below the EN 250:2000 cold test limit (2°C). - Rapid Intermediate Pressure Adjustment (pat.) (to be performed by an Authorized SCUBAPRO® Technicians only) : the intermediate pressure can now be adjusted externally, and needn't disassemble the first stage. An adjustment screw made out of stainless steel moves the high pressure seat axially. Rotation is hampered by an antifriction spacer. The remarkably stable intermediate pressure and higher flow of air produced by the MK25 stems from the piston construction. The pneumatically balanced air flow through the piston, a development pioneered by SCUBAPRO® in the 60's, remains unaffected by changes in cylinder pressure. The high pressure air from the cylinder acts radially around the piston stem without exerting a moving force. The force used to move the piston and close the valve is generated by the fluctuating pressure working against the main spring. The consistent air flow rate is principally due to the construction details . Most 1st stage regulators are designed for maximum performance with a full cylinder. The MK25 design was conceived to insure maximal performance with lower supply pressures as well. Small bores were increased to allow higher air flow at lower pressures. The piston diameter was increased and its stem length adjusted to maximize available flow to the 2nd stage, increasing overall performance. Intermediate pressure ports are situated on a swivel turret allowing 360° rotation even while pressurized. The swivel has 5 intermediate pressure ports: 4 situated I - 11 User Instructions for Breathing Regulators radially from the flow, and one at top dead center. The center port offers 15% greater air flow than the radially situated ports. High pressure outlets are found on each side of the main body, permitting an spg and/or console to be connected on either the right or leflt side. Note: Designed for the maximum resistance to most conditions, a minimum of care and maintenance is recommended (see point 10. CARE AND ATTENTION). 5.19 Diaphragm 1st stages: MK17 A.F. and MK11 In a diaphragm first stage, water pressure is transmitted to the H.P. valve by a flexible membrane that seals the internal HP mechanism; this is the best solution when diving in dirty or cloudy or contaminated water. High quality of materials and innovative engineering solutions used in the manufacture of MK17 /MK11 provide maximal performance and reliability. The MK17 is an over balanced first stage with design and performances characteristic of the SCUBAPRO® family: 1. The small size and low weight are the major advantages of the MK17, yet is still offers four intermediate pressure ports and two high pressure ports. 2. It is a balanced first stage, with a built in antifreeze system. 3. Replaceable HP seat and HP poppet for durability and easy servicing. 4. Two special LP ports (HFP), close to the diaphragm, offer ~15% greater air flow. 5. The Dry balance chamber prevents the water contact with the diaphragm and the spring, the regulator then achieves the best cold water performances. The MK11 is a 1st stage with all of MK17 functional characteristics, but it is lighter and smaller because of the absence of the dry balance chamber. Note: Designed for the maximum resistance to most conditions, a minimum of care and maintenance is recommended (see point 10: CARE AND ATTENTION). 5.20 2nd Stage R190 This is the most popular standard regulator in the world. The case made of fiberglass and graphite reinforced polyamide guarantees low weight, high resistance to wear, and superb breathing comfort. It can be configured for an intermediate pressure hose connection on the right or on the left for use as an alternate air source (octopus). The V.l.V.A. can be adjusted both in and out of the water (see point 5.14 V.l.V.A. - fig.3). A decrease in breathing assistance can be an advantage when entering the water, descending head first, in strong currents, or to prevent unwanted "Free flow" when using the second stage as an octopus. It is provided with an antiengraving system (see point 10. CARE AND ATTENTION, Storage - fig.11). Use and maintenance ( see point 8-9-10-11 on the manual). I - 12 ENGLISH User Instructions for Breathing Regulators 5.21 2nd Stage R290 This second stage is the R190's natural evolution which is the most popular regulator in the world. Lightweight (150 g. only) and reduced size (25% smaller) are the two remarkable improvements of this unit, still maintaining, or rather, optimizing all the R190's features. The R290 can be assembled with the L.P. hose either on the right or on the left side. The R290 has a preset moderate Venturi effect which prevents the unwanted free flow: it can be adjusted by an Authorized Scubapro repair technician to the personal requirement of the diver. Use and maintenance (see point 8-9-10-11 on the manual). 5.22 2nd Stage R295 This second stage is the R290's natural evolution. The main innovations are the greater performances due to the new lever and the new diaphragm with the new disc that allows a lower friction. The new shape of the lever offers a more progressive and constant air flow. The R295 can be assembled with the LP hose either on the right or on the left side. The R295 has a preset moderate Venturi effect which prevents the unwanted free flow: it can be adjusted by an Authorized Scubapro repair technician to the personal requirement of the diver. Use and maintenance (see point 8-9-10-11 on the manual). 5.23 2nd Stage R390 This second stage is the R190's natural evolution which is the most popular regulator in the world for maximum reliability and performances. Lightweight (150 g. only) and reduced size (25% smaller) are the two remarkable improvements of this unit, still maintaining, or rather, optimizing all the R190's features. The R390 can be assembled with the L.P. hose either on the right or on the left side. The R390 allows to personalize the Venturi effect, by simply adjusting a lever (fig. 3 - see point 5.14 V.l.V.A.). A decrease in breathing assistance can be an advantage when entering the water or when descending head first. Use and maintenance ( see point 8-9-10-11 on the manual). 5.24 2nd Stage R395 This second stage is the R390's natural evolution. The main innovations are the greater performances due to the new lever and the new diaphragm with the new disc that allows a lower friction. The new shape of the lever offers a more progressive and constant air flow. The R395 can be assembled with the LP hose either on the right or on the left side. I - 13 User Instructions for Breathing Regulators The R395 allows to personalize the Venturi effect, by simply adjusting a lever (fig 3 ­ see point 5.14 V.I.V.A.). A decrease in breathing assistance can be an advantage when entering the water or when descending head first. Use and maintenance (see point 8-9-10-11 on the manual). 5.25 2nd stage S600 / CLASSIC /S600T In this model, all SCUBAPRO® features developed from many years of experience have been concentrated in order to offer the best comfort, performances and durability, in a pleasant design. Lightweight, reduced size, anti-icing system, orthodontic mouthpiece, are some key aspects of this project as well as the inhalation and vacuum assist control (V.I.V.A.), the pneumatically balanced poppet and a new design. - Weight: S600/CLASSIC= 168g.; S600T =152g. These are the SCUBAPRO® lightest second stages, thanks to the use of carbon fibre and TITANIUM (with the S600T). - Pneumatically balanced: pneumatic balancing is made possible by a small longitudinal bore hole through the seat and poppet assembly. This allows air to pass into a small chamber at the far end of the piston. The air trapped chamber provides a counter force moving the piston back against the intermediate pressure port, balancing out the forces trying to open the valve. This permits the use of a softer spring and provides a smoother action under all conditions. WARNING: during storage, unscrew the adjustment knob to reduce engraving of the poppet (+) (fig 6D). - Full anti-icing system: the composite housing, made of metal and technopolimer with carbon fibers added, insulates and protects the valve-lever assy, giving the S600/S600T a superior performance under extreme cold conditions, by virtually eliminating the ice formation in the second stage (Patented) (fig 6 ­ B). - Lever: the shape of the lever (fig 6 ­ L) allows a smoother progression of the flow during inhalation. - Orthodontic mouthpiece: designed in cooperation with worldwide experts in this matter, it offers the best grip with the lowest jaws effort, as well as better breathing performance. - Poppet: streamlined and light for better flow feature with a low friction, and consequently a low inhalation resistance - Inhalation resistance control: the inhalation resistance can be adjusted on the S600/S600T by turning the external knob (fig 6 D). The screw adjusts the valve spring tension which leads to a corresponding increase or decrease in the inhalation resistance. The knob must be turned clockwise inward, to increase the inhalation resistance and counterclockwise (outward) to decrease the inhalation resistance. These adjustments can be made both in and out of the water. A decrease in breathing assistance can be advantageous when entering the water, I - 14 ENGLISH User Instructions for Breathing Regulators fig. 6 descending head first, in strong currents, or to prevent unwanted "free flow" when using the second stage as an octopus. - V.I.V.A. (see fig. 3 B ­ point 5.14 on the manual) Note: Hard breathing settings will not help you conserve air, and may actually have the opposite effect because of increased respiratory fatigue. Use and maintenance (see point 8-9-10-11 on the regulator manual) I - 15 User Instructions for Breathing Regulators 5.26 2nd stage S550 Lightweight, reduced size, anti-icing system, orthodontic mouthpiece, are some key aspects of this project as well as the inhalation and vacuum assist control (V.I.V.A.) and the pneumatically balanced poppet. - Weight: 152g. - Pneumatically balanced: pneumatic balancing is made possible by a small longitudinal bore hole through the seat and poppet assembly. This allows air to pass into a small chamber at the far end of the poppet. The air trapped in the chamber provides a counter force moving the poppet back against the intermediate pressure orifice, balancing out the forces trying to open the valve. This allows the use of a softer spring and provides a smoother breathing under all conditions. - Full anti-icing system: the composite housing, made of metal and technopolimer with carbon fibre added, insulates and protects the valve-lever assy, giving the S550 a superior performance under extreme cold conditions, by virtually eliminating the ice formation in the second stage (Patented). - Lever: the shape of the lever allows a smoother progression of the flow during inhalation. - Orthodontic mouthpiece: designed in cooperation with worldwide experts in this matter, it offers the best grip with the lowest jaws effort, as well as better breathing performance. - Poppet: streamlined and light for better flow feature with a low friction, and consequently a low inhalation resistance. - V.I.V.A. (see fig. 3 B ­ point 5.14 on the manual) Use and maintenance (see point 8-9-10-11 on the manual) 5.27 2nd stage S555 In this new model, S550's natural evolution, SCUBAPRO® features developed from many years of experience have been concentrated in order to offer the best comfort, performance and durability in a new and pleasant design. Lightweight, reduced size, anti-icing system, orthodontic mouthpiece, are some key aspects of this project as well as the inhalation and vacuum assist control (V.I.V.A.) and the pneumatically balanced poppet. - Weight: 152g. - New cap: protects the adjustment system from not intentional maladjustment (fig 7-P) - Pneumatically balanced: pneumatic balancing is made possible by a small longitudinal bore hole through the seat and poppet assembly. This allows air to pass into a small chamber at the far end of the poppet. The air trapped in the chamber provides a counter force moving the poppet back against the intermediate pressure orifice, balancing out the forces trying to open the valve. This allows the use of a softer spring and provides a smoother breathing under all conditions. I - 16 ENGLISH User Instructions for Breathing Regulators - Full anti-icing system: the composite housing, made of metal and technopolimer with carbon fibre added, insulates and protects the valve-lever assy, giving the S555 a superior performance under extreme cold conditions, by virtually eliminating the ice formation in the second stage (Patented). - Lever: the shape of the lever allows a smoother progression of the flow during inhalation. - Orthodontic mouthpiece: designed in cooperation with worldwide experts in this matter, it offers the best grip with the lowest jaws effort, as well as better breathing performance. - Poppet: streamlined and light for better flow feature with a low friction, and consequently a low inhalation resistance. - V.I.V.A. (see fig. 3 B ­ point 5.14 on the manual) Use and maintenance (see point 8-9-10-11 on the manual) fig. 7 I - 17 User Instructions for Breathing Regulators 5.28 2nd Stage G250 H.P. It is the legendary balanced full size SCUBAPRO® second stage. - Pneumatically balanced: pneumatic balancing is made possible by a small longitudinal bore hole through the seat and piston assembly. This allows air to pass into a small chamber at the far end of the piston. The air trapped in the chamber provides a counter force moving the piston back against the intermediate pressure port, balancing out the forces trying to open the valve. This permits the use of a lower rated spring and provides a softer action under all conditions. - Full anti-icing system: the composite housing, made of metal and technopolimer with carbon fibre added, insulates and protects the valve-lever assy, giving the G250 H.P. a superior performance under extreme cold conditions, by virtually eliminating the ice formation in the second stage (Patented) (fig 6B). - Inhalation resistance control: the inhalation resistance can be adjusted by turning the external knob (fig. 6D). The screw adjusts the valve spring tension which leads to a corresponding increase or decrease in the inhalation resistance. The knob must be turned clockwise, inward, to increase the inhalation resistance and counterclockwise to decrease (outward). These adjustments can be made both in and out of the water. A decrease in breathing assistance can be advantage when entering the water, descending head first, in strong currents, or to prevent unwanted "free flow" when using the second stage as an octopus. Note: hard breathing settings will not help you conserve air, and may actually have the opposite effect because of increased respiratory fatigue. Warning: during storage, unscrew completely the adjustment knob to reduce engraving of the poppet (+) (fig. 6D). - V.l.V.A. (see fig. 3 A - point 5.14 on the regulator manual). Use and maintenance (see point 8-9-10-11 on the manual). 5.29 2nd stage X650 / X650T The project of this new second stage maintains some basic features of the legendary D-400, yet improves on it in many aspects. 1. Weight : X650 =160 g; X650T = 144 g 2. Design. The case is angled : this structure, in combination with a streamlined shape, lighter weight and new orthodontic mouthpiece, minimizes jaw fatigue (fig. 8 - ). 3. Straight coaxial flow. The inhalation hole, in the housing, is positioned just in front of the mouthpiece, coaxial with the latter, so the flow is perfectly straight into the divers mouth, without curves or angles that cause turbulence with consequent vibrations and loss of flow (fig. 8 - F). 4. Pneumatically balanced : pneumatic balancing is made possible by a small longitudinal bore hole through the seat and piston assembly. This allows air to pass into a small chamber at the far end of the piston. The air trapped in the chamber provides a counter force moving the piston back against the intermediate pressure port, balancing out the forces trying to open the valve. This permits the use of a softer I - 18 ENGLISH User Instructions for Breathing Regulators spring and provides a smoother action under all conditions. 5. New full anti-icing system : the composite housing, made of metal and technopolimer, insulates and protects the valve-lever assy, giving the X650 a superior performance under extreme cold conditions, by virtually eliminating the ice formation in the second stage (Patented) . 6. Inhalation resistance control : the inhalation resistance can be adjusted by turning the external knob (fig. 8 ­ K) that has a special design : its ribs are asymmetrically designed, so the grip is strong only in one direction (by turning it inwards) to prevent that a forced outward rotation could reduce the preset inhalation crack point. WARNING : during storage, unscrew the adjustment knob to reduce engraving of the poppet (+) (fig. 8). 7. Switch lever, Dive-Predive. To reduce to the minimum the dimensions and drag, this switch is coaxial with the adjustment knob, with a lever (fig. 8 - S) that can be easily adjusted even with thick gloves. The predive mode has to be used only on surface (fig. 8 -DIVE/PREDIVE). 8. Exhaust valve. This new component has a surface which is 10% bigger than the existing one. In addition, position and profile of the exhaust tee reduce the total exhalation effort by more than 15% (fig. 8 - V). 9. PERFORMANCE. Thanks to all the above new designs and components, the performance is at the top of the regulator category. 10. The front purge cover, made of elastic material to protect the case from shocks, has through holes protected by small upstream lids, to avoid that a strong current, for instance, could push the diaphragm causing leakage (fig. 8 ­ L). 11. The mouthpiece. It has been designed in cooperation with worldwide experts in this matters and it offers the best grip with the lowest jaws effort, as well as better breathing performance. It is fixed with the removable mouthpiece clip (Patented) (fig. 8 ­ C) to easily replace it, in case of fig. 8 need. 12. V.I.V.A. (see Fig. 3C - paragraph 5.14). Use and maintenance (see point 8-910-11 on the manual). I - 19 User Instructions for Breathing Regulators 6. TECHNICAL SPECIFICATIONS 1ST STAGES MK2 Plus MK17 AF MK16 MK20 Nitrox 200 bar MK25 A.F. MK25T A.F. MK25 S.A. MK11 Weight DIN 200 (g./oz.) 470/16.5 600/21.2 486/17.1 618/21.8 694/24.5 830/29.3 2600/92 >5000 /177 620/21.8 638/22.5 850/29.9 >5000 /177 690/24.3 / 833/29.3 >8500 /301 615/21.7 628/22.1 848/29.9 >8500 /301 360/12.7 243/8.6 540/18,9 558/19,5 Weight DIN 300 (g./oz.) Weight INT (g./oz.) 456/16 >8500 /301 476/16.8 >8500 /301 770/27 >5000 /177 Air Delivery at 200 bar (l. min./SCFM) I.P. (bar/psi) INT/DIN 200 Max Work Press. (bar/psi) 8.5 - 9.8 9 - 9.8 121-139 128-139 230 /3365 /4350 9 - 9.8 128-139 230 /3365 /4350 9 - 9.8 128-139 230 /3365 / 9 - 9.8 128-139 230 /3365 /4350 9 - 9.8 128-139 230 /3365 /4350 9 - 9.8 128-139 230 /3365 /4350 9 - 10 128-142 230 /3365 /4350 230 /3365 /4350 DIN 300 Max Work Press. (bar/psi) 300 1 4 300 2 4 300 1 4 300 2 5 300 2 5 300 2 5 300 2 4 HP Ports (7/16" UNF) IP Ports (3/8" UNF) 2 5 2nd Stages X650T X650 S600T S600 / CLASSIC S550 G250 HP R290 R390 R190 R295 R395 S555 Weight (g./oz.) 180 /6.3 >2000 /71 14 /199 190 /6.7 >2000 /71 14 /199 152 /5.4 1850 /66 14 /199 168 /5.9 1850 /66 14 /199 152 /5.4 1800 /64 14 /199 206 /7.3 1600 /57 14 /199 150 /5.3 1400 /50 14 /199 150 /5.3 1400 /50 14 /199 212 /7.5 1400 /50 14 /199 150 /5.3 1400 /50 14 /199 150 /5.3 1400 /50 14 /199 152 /5.4 1800 /64 14 /199 Air delivery at 200 bar (l. min./SCFM) I.P. Max. (bar/psi) I - 20