Spring return valve refers to the valve that can return to the original starting position under the action of internal spring. It is suitable for 1/4 rotary handle operation of the ball valve, is generally composed of two/three pieces of the ball valve and a spring lever or handles unit to return the valve to the fully open position, also known as spring automatic return ball valve or spring self-closing ball valve. The spring return ball valves can be offered to include socket weld, butt weld and flanged, they are used in applications where positive return to the closed position is required following momentary or short periods of operation for food, pharmaceutical, oil, chemical, metallurgical, mechanical process and other industries. In addition, the spring return design has been used for gate valves and globe valves.
Details of the spring return ball valve
Size: Up to DN50
Pressure: Up to Class 600
Standards: API 608/API 6D
Test standards: API 598
Nominal diameter: DN15 — DN100 (mm)
Connection: Thread, flanged
Temperature range: ≤-180℃
Body material: Cast steel WCB, Stainless steel 304/316
- Manual back to started position quickly and avoiding the wrong operation;
- Two-piece or three-piece structure is simple and easy to maintain, full port and low flow resistance.
- Stainless steel ball material, reduce the parts wearing and extend the service life.
- PTFE seat/packing rod offers good sealing performance, not easy to be medium corrosion or friction damage when fully opened or fully closed.