We produced some kinds of Spring assortment for safety valve,control valve,three-way valve and so on.They strongly pressed for 24 hours and tested for 3000 times.No distortion,no rupture.They are used to each coal machine enterprise.

1. Applications: safety valves, control valves, tri-valves, hydraulic control check valves;
2. Tested with force of 30,000lbs for 24-hour period ;
3. Fine craftsmanship to each coal machine enterprise.