- Features
- Compact design with short face to face dimensions for minimum space requirements
- Dual shaft design allows interchangeability of shafts
- Torsion springs close the valve prior to flow reversal
- Torsion springs exert a lifting motion on the discs, enabling the center "heel" to open first
- Downstream stop shaft stabilizes the discs at high flow rates and prevents them from striking each other, which can cause premature wear, stress on the shaft, and chattering
- Standards/Approvals: ANSI Specified, API 598, FM Approved
- Applications: For liquids and gases where flow reversal can cause surge and water hammer