Valves for gas cylinder

Species gas valves

Before a detailed discussion of the shut-off valve, it is necessary to clarify that it is only a piece containers for transportation and storage of various gases under pressure.Made cylinders made of carbon or alloy steel according to GOST 949-72.Between themselves, they differ in color and size, but the same device.Thus, the gas cylinder is composed of a valve, seal carving and seamless tank knocked it necessarily passport data, assigned by the manufacturer.

valves are divided into several varieties, depending on what filled cylinders: liquefied gas, oxygen or propane-butane.In this case, the distinguishing features of construction there is little, differs only in the marking of valves in accordance with GOST:

• Blue - to indicate the oxygen valve;
• Red - propane-butane;
• White - acetylene, etc.

gas cylinder valve: device and features.

All zapornyeustroystva arranged virtually identical and consist of these parts:

• steel body in the form of a tee, each side of which has a thread: the bottom - for winding on the cylinder, the upper cylindrical - for nuts from the valve side - under the cap;
• obturator having in their composition and capacity of the valve stem, which transmits torque to the flywheel element to the valve;
• flywheel, which by means of a nut connected to the valve stem.
• gaskets, which are located between all the items and provide extra reliability of this design.

distinctive feature of this closure device is the ability to withstand the constant pressure of 15 to 190 atmospheres.

How to replace the gas valve

Before replacing this equipment, carefully read this manual and strictly observe all safety rules.And remember that the gas in any amount does not tolerate neglect yourself.

• Before removing the valve can be as preparatory work, unscrew the locking unit to exit gas residues.This should be done in a well-ventilated room or outdoors;
• Thereafter, the item must be a bit warm.This will allow much easier to unscrew the valve by hand or wrench.This procedure is absolutely safe, the main thing is not to overdo it with heat.
• Removing the failed valve, be sure to prepare the latch assembly for installation.For this purpose, the conical fitting located at the bottom of the body imposed a special sealant, Teflon tape may be used;
• The final step is to screw the new valve dinanometricheskim key allowing to control the force applied.

Do not forget to make an appropriate note on the conduct of the procedure in the gas cylinder passport.

quality control procedures carried out and no leakage is conducted as follows: in the docking position applied a lather and slowly open the valve.No leakage is characterized by the absence of bubbles, if they are still there, you need to immediately tighten the valve back and double-check all connections.

Do not forget that your life is in your hands!Be careful and follow all fire safety regulations!