Understand How Different Cylinder Valves Work

By Connie Sears


Cylinder valves are distinguished by their features which are informed by how they work. The features affect how they are connected to cylinders, regulators and where they can be used. The market has developed two thread variations depending on the specifications outlined on different models of cylinders. There is a clear difference between the parallel and the taper models.

Yoke or clamp valve, 232 bar DIN and 300 bar DIN are the three types commonly available in the market. There are used on different cylinders depending on the purposes for which they have been designed. Different countries have varying specifications which make a difference on the accessories used in compressors. They suit different industries because of their properties.

The Yoke valve is also commonly known as A-clamp uses the valve pillar to connect to the regulator. The O-ring presses the output and the input seat together. It requires that users screw it by hand since the use of clamps or machine can make it too tight causing difficulties during disengagement. Gas is prevented from leaking by the pressure coming from the gas in the container.

This type of valve is preferred for use by different countries because it is simple to assemble and cheap as well. It comes with a maximum pressure bar of 232, which is a restriction for some cylinders. The O-ring can only handle pressure up to a certain point because it is the weakest point. Too much pressure makes it vulnerable. It can only be used on certain cylinders depending on their pressure.

The other category of valve is the 232 bar DIN which is known as 5 thread G5/8. It is advantageous since the O-ring screws well trapping all the pressure inside. This means that it is more secure than the yoke valve. Some countries are restrictive when it comes to the use of this valve and a user will therefore be required to use adapters in order to secure their cylinders using DIN fitting.

Cylinders dealing with more pressure can use the 300 bar DIN which is also called the 7 thread G5/8. The pressure rating is higher at 300. It is common in Europe since they do not have restrictions on cylinder transportation like those found in America. Americans do not allow road transportation of cylinders if their pressure rating exceeds 232. Even the safety approval of such containers cannot warrant an exemption.

The decision on the valve to use depends on the pressure of the cylinders one is working with. The design and configurations are determined by pressure specifications. Specifications for the yoke valve are 200 and 240. Their design does not restrict cross use. The DIN variety is restrictive on use because of its design and this can only be overcome when you use an adapter.

Other accessories sold alongside cylinder valves include manifolds that allow the sharing of content in two cylinders through one supply line. The two can be cramped together using a steel band. Boots may be used to protect the surface from abrasion or the container from corrosion during storage or use. Nets are used to prevent scratching especially during transportation while handles are used to ease transportation.




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