Ligth weight, versatile design
80% to 90% less than conventional full-body swing check valves
- Simplifies piping
- Reduces termal and seismic considerations
- Optimizes space utilization
- Lowers installation costs
- Reduces pipe supports
- Requires less number of man-hours
Dual Dics open to 85 degrees
- Low cracking pressure and overall pressure drop
- Ensures positive closure
Spring-loaded discs calculated to increase the responsiveness of the discs
- Alleviates water hammer and resultant damaging effects
Extended long-leg spring
- Prevents seat wear caused by scrubbing
Products List
- GENERAL APPLICATION
- General service piping systems
- Water, Oil, gasoline, Chemicals
- Gas (compressible gases)
- Air (compressed air and blower)
- INSTALLATION
- SEJIN FS wafer check valves are designed for installation in flanged piping systems, between two flanges. Valves may be installed in vertical or horuzontal piping. Care must be taken to always install the valves with the shafts in a vertical position when installing in a horizontal pipeline. Vertical up flow is always a good installation. Consult factory for vertical down flow.
- SEJIN FS wafer check valves are designed to provide long service life if the velocity is kept within the flow rate shown in the table on page 8~9 and if a minimum of 5 pipe diamaeters of straight pipe in front of the valve is maintained downstream from a likely cause of turbulence (i.e., pump discharge, reducers or elbows).
- INDUSTRY STANDARDS
- ASME B16.1, B16.5, B16.34, B16.47 and B31.1
- API 594 and 598
- MSS-SP-25, MSS-SP-55
- API 6A and 6D (as applicable)
- MSS-SP-61 (standard for the resilient seated, metal seated when required)