Ball Valve - a type of shut-off valves, which according to Regulation producers, most cases is intended to operate in only two states: Open / Closed (without intermediate provisions).
The shutter mechanism has a spherical shape with a through hole. The tightness of these devices is achieved by sealing rings disposed on either side of the rotating shutter.
The figure below illustrates a sectional view of the locking mechanism and the direction of the working medium pressure distribution. In this case, the sealing ring and the locking ball №1 act as a pair of precision, providing the necessary tightness.
Both ball valves, for water and for gas - have the same scheme of work, but fundamentally different in the performance of the structural part.
Distinctive features
- arm color - a visual contrast to the user / buyer is not confused purpose valves.
- The gas valve has a "long" thread L2> L1 unlike plumbing.
- Strength characteristics of increased body by the use of special grades of steel or brass with a high% copper, and therefore the housing visually gas taps - yellower.
- Gas valve stem, whereby rotation of the locking element is attached, is made of polymer material is much stronger than in the discharge valve for the water. Just stem seal is not formed from nitrile rubber (NBR), and of an inert gas to - the rubber.
- Even despite the fact that the pressure in the pipeline several orders of magnitude below the O-rings are executed higher quality pictures, thereby, securely fixed closure member with pressurized working environment. Here it is worth noting that the physical properties such as viscosity - the gas is much lower than that of water - so the increased elastic properties of seals.
- It is also important that both types of valves are produced on different lines, respectively, and tested for leaks with a few different ways. Ball gas valve must initially be most comfortable seal due to lapping (precision pairs).
In summary, the gas shut-off valve has a high degree of integrity, and it is quite logical. In general - all gas valves have the highest tightness class - a class "A".
In this connection, if the gas valve installed on the water is still possible, on the contrary - DO NOT!
Thank you for your attention, take care of yourself and loved ones!
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