The United States VTON Granville shield imported pneumatic multi-stage step-down regulator valve, using the sleeve guide, pressurebalancedvalve.
美国VTON威盾进口气动多级式降压调节阀，采用套筒导向，压力平衡式阀芯。
2
According to flow in a different, balanced spool valve the pressure can be pre-pressure, can also be a back pressure valve.
根据流向不同，平衡阀芯所受的压力可以是阀前压力，也可以是阀后压力。
3
The balance extension tube functions to retain balancedpressure in front and at the back of the cleaner prior to the opening of the valve to prevent it from impacting the valve core.