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By adding a diaphragm to this environmental sealed DF300E unit, the spring chamber is sealed completely and can effectively improve the performance of the regulator for diving under extreme conditions. Regardless whether the pressure of the tank is 500psi or 3000psi, this 1st stage regulator will always offer divers stabilized air. The intermediate pressure internal adjustments allow divers to choose any one of the 2nd stages to connect with Promate DF300E regulators in today's market. (DIN Connection Available)
Recommended 2nd Stage: OC900, OC750, OC350, OC300, OC450, OC400
Advantages: reliable, ideal regulator for dirty water environment and all diving conditions. Environmentalized to prevent freeze-up.
Users: ice divers, tech divers, pro divers
Type: Sealed Balanced Diaphragm First Stage Regulator
Ventilation Rate (Air Supply / 3000 PSI): 135 SCFM
Intermediate Pressure (Air Supply / 3333 PSI): 125 - 160 PSI
Intermediate Pressure (Air Supply / 500 PSI): 125 - 160 PSI
High Pressure Port (7/16"): 2
Low Pressure Port (3/8"): 4
Body and Component: Chrome Plated Brass with Satin Finished
Yoke / Yoke Knob: Heavy Duty Brass (4000 PSI) / Nylon Fiber
Spring / H.P. Seat: #302 Stainless Steel / Special Teflon
Weight: 34 oz.