needle valve materials should be based on the parameters and the properties of materials according to the standard, and shall conform to the relevant provisions of the standard products. Also can choo

needle valves are used to control flow into delicate gauges

a Needle Valve controls flow in both directions (bi-directional). A finely threaded stem allows the gradual adjustment of the amount of controlled flow passing through the valve.

needle valve in the body and bonnet normally, disc, seat and disc(stem, hot slice, packing and driving device (the handwheel, gear box or pneumatic, electric equipment, etc.).

needle valve use and information

needle valves are very useful for our life.One characteristic feature of need valves is a means to prevent backlash or movement of the valve stem with respect to its threaded housing as a result of pl

theneedle valve fluid dynamic effects,the main valve fluid power

High fuel pressure can essentially cause a perfectly good needle valve to leak and this high fuel pressure is the results of an inaccurate fuel pump or an electrical pump that is producing too much pr