Check Valves
Weir SPM Check Valves are made of high strength steel and are precision manufactured to exact tolerances for clapper styles in 2` through 4` sizes, dart styles in 1` through 3` sizes, and CO2/nitrogen styles in 2` and 3` styles. The clapper design features either a standard coating or the superior abrasion and acid resistant coating to give longer operating life in corrosive applications. The rugged valves operate at working pressures from 6,000 to 20,000 psi in well service applications such as acidizing, cementing, fracturing, and energized fluids. Weir SPM`s check valves are manufactured from solid forgings to maximize strength and abrasion resistance. Weir SPM carries the most complete line of Check Valves available to the well service industry. Various configurations are offered, including wing-ahead (standard flow) or thread-ahead (reverse flow) models. Each check valve is color-coded for safety and convenience.
SD Check Valve
Weir SPM`s new Severe Duty Check Valve is designed specifically to provide longer life and reliable operation in severe service environments. Ideal for the harsh pumping operations seen in the developing shale plays such as Haynesville, the SD Check Valve utilizes unique design features resulting in improved reliability and performance compared to other check valves currently available to the market.
Features & Benefits
Utilization of a Threaded Seat:
- Self-locking design prevents seat from becoming loose due to high vibration of flow line
- Machined from high erosion and high corrosion resistant NACE compliant stainless steel for longer life
- Features o-ring for excellent sealing performance
Enhanced Hanger:
- Flat machined into hanger matches flat machined into body preventing rotation during operation
- Removes hanger pin from assembly requiring fewer component parts
Dart Style
The Dart Style Check Valve is constructed of a two-piece body that houses an inline spring loaded dart. When fluid enters from the inlet side, it will overcome the low spring force on the dart. The dart will travel away from the inlet and allow the fluid to flow around towards the outlet. When fluid flow stops, the light spring force closes the dart against its seat, preventing fluid from flowing back through the flow line. The Weir SPM Dart Style Check Valve is available for standard service and for sour gas (H2S) environments.
Co2 / Nitrogen Style
Weir SPM offers a specially designed CO2/Nitrogen Poppet Check Valve in sizes 2" and 3" to produce increased safety by preventing back flow in volatile CO2 and Nitrogen pumping flow lines. These stainless steel trim valves ensure that fluid cannot flow back into the manifold area or into pumps, and are rated up to 15,000 psi.