Ductile iron Swing check valve with counter weight limit switch
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Swing check valve
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Advancing Beyond Passive Backflow Prevention
In modern automated pumping stations, a check valve is no longer just a passive mechanical component; it is a critical source of system data. Veyron Valve’s Ductile Iron Swing Check Valve with Counter Weight and Limit Switch is engineered for critical infrastructure where the cost of a "blind" failure is unacceptable. By integrating a heavy-duty lever-and-weight system with high-precision sensing, this valve provides both the physical protection of an anti-slam device and the digital transparency required for remote SCADA (Supervisory Control and Data Acquisition) monitoring.
Hydraulic Transient Mitigation: The Counter Weight Logic
Standard check valves often suffer from "slamming" during sudden pump failure, leading to destructive pressure surges. Our Counter Weight system provides a mechanical solution to this hydraulic challenge:
- Customizable Closing Speed: The position of the weight on the lever can be adjusted to calibrate the valve’s closing speed. This allows engineers to fine-tune the disc’s response to match the specific deceleration curve of the fluid column, effectively mitigating water hammer.
- Assisted Sealing: In low-pressure or low-velocity systems where gravity alone might not be sufficient to ensure a tight seal, the extra torque provided by the lever ensures the disc reaches the seat instantaneously upon flow reversal, preventing "drip-leakage" and back-spinning of the pump.
Digital Integration: The Limit Switch Interface
The addition of the Limit Switch transforms the valve into an active participant in the plant’s logic loop.
- Real-Time Status Verification: The switch provides an immediate electrical signal to the control room, confirming whether the valve is "Fully Open" or "Fully Closed." This is essential for verifying pump start-up sequences and detecting "stuck disc" scenarios that could lead to motor burnout.
- Industrial Grade Sensing: We utilize IP67-rated limit switches housed in explosion-proof or weather-proof enclosures. The mechanical linkage between the valve hinge pin and the switch is designed for zero-slip, ensuring that even minor disc movements are accurately reported.
Technical Specifications
| Feature | Professional Specification |
|---|---|
| Design Standard | EN 12334 / BS 5153 / MSS SP-71 |
| Body Material | Ductile Iron GGG50 (EN-GJS-500-7) |
| Trim Selection | EPDM Resilient or Metal-to-Metal (Bronze/SS) |
| Signal Type | SPDT / DPDT Electromechanical Switch |
| Protection | FBE Coating (Internal/External) Min. 250μm |
| Pressure Class | PN10 / PN16 / PN25 |
Mechanical Resilience & Serviceability
Veyron Valve recognizes that the hinge pin is the most stressed component in a weighted valve. We utilize High-Tensile Stainless Steel (SS420/431) for the pivot, ensuring it can handle the additional cantilever forces exerted by the lever and weight. The external assembly is shielded with a protective cage (optional) to prevent accidental interference with the moving lever, ensuring operator safety in tight gallery spaces.
Strategic Applications
This valve is the definitive choice for Municipal Pumping Stations, High-Rise Water Boosters, and Industrial Cooling Towers. It excels in systems where pumps are operated in parallel and where the "open/closed" status of each check valve must be synchronized with the pump’s electrical controller to prevent reverse-flow start-ups.
| Place of origin | Product name | material | Port size | Working pressure | Application | guarantee period | Design standard | Face to face | Flanged drilling standard |
| Veyron Valve,Tianjin,China | Swing type check valve | DI-WCB-SS body/DI-SS-WCB disc/EPDM seat/metal seat/ss420 stem | DN50-DN600 | low and medium pressure | water | 18 month | BS5153 | EN558-1-10 | EN1092-2 |
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Veyron Valve (Tianjin) Co., Ltd.
Tel：+86 13821711216
Wechat/whatsapp：+86 18822206187
E-mail：anna@veyronvalve.com
Address：No.30,Xiaozhan Industrial park,Jinnan District,Tianjin,China
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