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San-o-Sub DIN HP Cylinder Valve - 300 bar

SL CYLVA3 12/22
Starting at: $139.00


This High Pressure DIN cross-flow valve is made by San-o-Sub, a leading Italian manufacturer of medical, industrial and scuba valves. They are strong and reliable and are made from really top quality materials. The inner air passages were carefully studied in the design so as to guarantee top performance even, and above all, with the top performance regulators. The valve design ensures an excellent grip, facilitating the opening and closing of the tank.

The valve has the longer 300 bar, female DIN connection with 7 threads to connect your first stage DIN scuba regulator.

The valve has a standard 3/4-inchx14 NPSM (NGS) parallel thread to fit the cylinder neck thread of most Australian Standard aluminium and steel tanks/cylinders/bottles. It has a 60° thread form, a pitch diameter of 0.9820 to 0.9873 in (24.94 to 25.08 mm), and a pitch of 14 threads per inch (5.5 threads per cm).

WARNING: Please ensure that you are fitting the valve to a cylinder with a matching thread. Getting it wrong is extremely dangerous.

These are the valves supplied standard with Faber steel 300 bar cylinders in Australia.

Valve Oxygen Cleaning:
This valve is Nitrox ready up to 40%. If you are planning to use this valve on a cylinder with Enriched Air Nitrox (Nitrox) mixes from more than 40% up to 100% oxygen, or where partial pressure blending is used to create a Nitrox mix of up to 40%, then it's essential for the safety of the cylinder user and the person filling the cylinder that the valve is oxygen cleaned and prepared with special o-rings, seats, and grease designed for exposure to pure oxygen. The cylinder should then be banded with the familiar yellow and green Nitrox band/wrap/sticker, and an Oxygen Clean 'In Test' inspection sticker applied. The Scuba Doctor can do all of this for you as an add-on service.

San-o-Sub DIN HP Cylinder Valve - 300 bar Features

  • Standard 300 bar Female DIN Connection with 7 Threads
  • High-Flow Characteristics to Maximise Regulator Performance
  • Easy-and-Comfortable Cylinder Handling
  • Positive Hand Wheel Grip for Easy-Identification of On/Off Direction
  • Proven and Readily Available Replacement Valve Parts
  • Approved Burst Disc Assembly with Integrated-Disc and Plug Design
  • Multi Ported Burst Disc Plug for Added Safety
  • Durable Corrosion Resistant Marine Grade Chrome Plated Brass
  • Heavy-Duty Valve Mechanism: Designed for Smooth-Operation
  • Standard 3/4"x14 NPSM Threaded Cylinder to Valve Inlet
  • High-Capacity Dip Tube
  • Nitrox Ready up to 40% (Can be O2 Cleaned)
  • Tested to Exceed Real World Expectations
  • Made in Italy

Colour: Black valve knob is standard.

Tech Tip

Regulator Fittings and Scuba Valves

The Deutsches Institut Für Normung (DIN) is a German standards setting organisation. DIN 477 is a specification that recommends cylinder valve outlet and connector designs for specific types of gases and pressures based upon safety considerations. These various designs have deliberate incompatibilities to preclude the possibility of errors when handling different types of compressed gases at differing working pressures. The two-valve outlets and connectors of interest for divers are the DIN 477 No. 13 and the DIN 477 No. 56 (formerly No. 50), both designated for use with compressed air.

The DIN 477 scuba valve outlet and regulator fittings are now the standard in Europe and are widely used by technical divers worldwide. Their thread form is also sometimes referred to as G 5/8" BSP. The regulator first stage DIN connector is a male screw type, and instead of clamping onto the outside of the valve as does the yoke, it screws directly into the female DIN outlet of the valve. The sealing O-ring is held at the end of the regulator connector rather than in the face of the outlet. The DIN 477 system, with its captured O-ring design, has proven to be very reliable for use with scuba gear.

Outlet/Connector #13 is from DIN 477 part 1, for cylinders with test pressure ratings up to 300 bar, and is commonly referred to in the dive industry by the slang term "200 bar", because most European and Australian dive cylinders with 300 bar test pressures have working pressures in the 200 bar range. The shorter 200 bar DIN connections have 5 threads.

Outlet/Connector #56 is from DIN 477 part 5, for cylinders with test pressure ratings up to 450 bar, and is commonly referred to in the dive industry by the slang term "300 bar", because most European and Australian dive cylinders with 450 bar test pressures have working pressures in the 300 bar range. The longer 300 bar DIN connections have 7 threads.

The two designs are nearly identical, but the 300 bar, #56 valve outlet is deliberately deeper with 7 threads so the shorter 200 bar, #13 connector with 5 threads will not be long enough to seat properly. This is a safety feature to prevent connecting a low-pressure device to a high-pressure supply. It's important to understand that the "200 bar" or "300 bar" descriptions are just slang terms that have nothing to do with the pressure ratings of the outlets and connectors themselves!

(12/22 HS)

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