Internal Design of Valve

Such type of design is commonly used for Chlorine, Ammonia, D/A, and Oxygen Cylinder Valves.

The internal design / working part / spindle / gland side designs are not specified in the ISI Standards except for wrenching portion of the spindle. The internal design of the Cylinder Valves are normally classified in following broad categories. . Metal to Metal Seat Type Design
When spindle tip and body seat are both metallic, they are ideal for areas where danger of fire exists. In the closed position metal to metal seat prevents the flow media from entering the atmosphere. The Cylinder valve having metal to metal seat should not be used with the hand wheel.