stainless steel valve practical application of several tips

1. Double seal valve can not as a shut-off valve

stainless steel two-seater valve core has the advantage of force balance structure, allow the pressure difference is big, but its disadvantage is that the two seal face not good contact at the same time, cause leakage. If it is used to cut off at artificially, mandatory, obviously the result is bad, even as it made many improvements ( Such as double sealing sleeve valve) It is not desirable.

2。 Stainless steel small open of the two-seater valve work easy oscillation

for single core, when the medium is away, the Industrial Valves has good stability; When the medium is flow closed type, the stability of the valve. Two-seater valve has two valve core, the valve core flow closed, valve core in the flow, so that when you are working in a small open degree, flow closed type of valve core is easy to cause the vibration of the valve, this is the reason why two-seat valves cannot be used for small open degree work.

3。 Straight trip held in regulating valve performance is poor, good performance for quarter-turn valves prevent

straight travel stainless steel valve throttling valve core is vertical, and medium level, cavity flow inevitably turn down turn, make valve flow becomes quite complex ( Shapes such as S type) 。 In this way, there is a lot of dead zone, provide the space for medium of precipitation, in the long term, causing congestion. Quarter-turn valves throttling direction is horizontal, flow into the medium level, level, easy to take unclean medium, at the same time, simple flow, precipitation medium space is little, so quarter-turn valves prevent performance is good.

4。 Straight travel regulator valve stem is fine

stainless steel valve straight travel regulator it involves a simple mechanical principle: large sliding friction and rolling friction is small. Straight trip valve stem up and down movement, packing a little pressure, it will wrapped the stem very tight, produce bigger return difference. To this end, the valve stem design very tiny, packing and commonly used small friction coefficient of ptfe packing, in order to reduce the return difference, but the problem is sent stem thin, easy to bend, packing and short service life. The best way to solve this problem, is to travel with rotary valve stem, namely quarter-turn class regulating valve, the valve lever than straight travel stem thick 2 - Three times, and selects the long-life graphite packing, good stiffness, the stem packing long life, instead of the friction torque is small, poor little back.

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