The Sonar M25X2 Metric DIN/K Valve has a M25x2 cylinder thread with outlet fitting for 232 Bar DIN or A-Clamp. The valve regulator connection incorporates a threaded insert, which means it can equally be used for both INT bracket (Yoke) or DIN connection.
!!! IMPORTANT !!! This is not a standard Australian sized thread!
The Sonar M25X2 Metric DIN/K Valve only fits dive cylinders/tanks/bottles with a metric M25X2 threaded neck (i.e. the thread form for the cylinder valve fitting into the cylinder). M25 means the diameter of the thread is 25 mm and the X2 defines the 2 mm pitch of the thread. These M25X2 threaded cylinders are not typically found in Australia where the standard is to use a 3/4 inch NPSM neck thread.
These M25X2 metric thread valves are only for use with metric M25X2 threaded cylinders. While they can be wound into a cylinder/tank with a 3/4 inch NPSM threaded neck, they with not seal properly and the combination can be very dangerous. So do not try and use these valves on typical Faber, Catalina, Luxfer etc. cylinders purchased in Australia.
When someone tries to fit a M25 valve into a 3/4 BSP cylinder thread, they will get it to seal, but only after damaging the brass threads on the valve. This produces an unstable fitting which can result in the valve coming out with incredible force that could seriously injure someone or even kill. See Wrong Cylinder Valve for an example of what can happen. You have been warned.
!!! IMPORTANT !!!
PLEASE NOTE: Cylinders and valve threads come in a variety of sizes and great care must be taken to ensure that they are properly matched. Only qualified scuba servicing professionals should be installing this equipment. Please ensure you have the training and experience required before purchasing this item if you intend to fit it yourself. If you are unsure, please call your local scuba technician to provide appropriate information for your system.
Sonar Metric M25x2 DIN/K Cylinder Valve 230 Bar Features
- DIN/K Convertible valve
- 230 bar Burst Disc
- Metric M25x2.0 cylinder thread
- Beautiful Satin finish - Chrome Brass construction
- Easy to carry with a large hand wheel
Valve Oxygen Cleaning:
The valves are supplied Nitrox ready, suitable for use with up to 40% oxygen. However, if you are planning to use the valve with Enriched Air Nitrox (Nitrox) mixes from 40% to 100% oxygen, it's essential for the safety of the cylinder user, and the person filling the cylinder, that the valve be oxygen cleaned and prepared with special o-rings, seats and grease designed for exposure to pure oxygen. The Scuba Doctor can do all of this for you as an add-on service.
What is the difference between DIN "200 Bar" and DIN "300 Bar" valves?
The Deutsches Institut Für Normung (DIN) is a German standards setting organization similar to our American National Standards Institute (ANSI) and Compressed Gas Association (CGA). 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 valve and regulator fittings are most widely used outside the U.S. The regulator first stage DIN connector is a male screw type, and instead of clamping on to 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 in the end of the regulator connector rather than in the face of the outlet. The DIN 477 system, with it's captured o-ring design, has proven to be very reliable for use with SCUBA.
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 SCUBA industry by the slang term "200 bar", probably because most cylinders with 300 bar test pressures have working pressures in the 200 bar range.
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 SCUBA industry by the slang term "300 bar". The two designs are nearly identical, but the #56 valve outlet is deliberately deeper so the shorter #13 connector 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!