electric check valve Description
Electric check valve is a check device that controls the opening and closing of the valve disc through an electric actuator. It has both the one-way shut-off function of a traditional check valve and the remote automation control capability of an electric valve. Its core functions include:
Anti-medium backflow: Relying on the sealing structure of the valve disc and the valve seat to prevent the reverse flow of the medium;
Intelligent opening and closing: Receiving external signals (such as PLC instructions) through the electric actuator to achieve precise opening and closing of the valve.
Core components
Valve body: Mostly adopts a three-piece stainless steel structure (left valve cover + middle valve body + right valve cover), which is fastened by bolts to enhance sealing;
Valve disc: Lifting or swing design, the sealing surface is covered with fluoroplastic/rubber layer, suitable for corrosive media;
Electric actuator: Integrated motor, worm gear transmission device, supports 4~20mA signal or digital command control.
Working principle
Forward flow: The medium pressure pushes the valve disc open to allow circulation; Reverse backflow or active closure: The electric actuator drives the valve disc to force closure to block backflow (traditional check valves rely on medium pressure and deadweight, while electric check valves can actively intervene).
electric check valve specification
| Part | Material | EN Spec. |
| Body | Cast Iron | A126 Class B |
| Ductile Iron | A536 Gr.65-45-12 | |
| Shaft | Stainless Steel 410 | A276 S410 00 |
| Stainless Steel 431 | A276 S431 00 | |
| Seat Ring | EPDM /NBR | |
| O-Ring | EPDM /NBR | |
| Bushing | PTFE | |
| Bronze | B62 C83600 | |
| Valve Standard | ||
| ISO 5752/BS5155/BS EN 593/MSS SP-67/API 609 | ||
| Pressure Temprature and Rating | ||
| Working Pressure | 16bar/27.5bar | |
| Testing pressure | Shell: 24bar/37.5bar | |
| Seal: 17.6bar/27.5bar | ||
| Working Temperature | -20°C to 110°C EPDM Seat | |
| -10°C to 80°C NBR Seat | ||
| Suitable Media | Water, Oil& Gas | |
| Description Products | ||
| Size | DN40-DN1200 | |
| End flange | ANSI B 16.1, EN 1092, AS 2129 | |
| Face to face | ANSI B 16.10; EN 558-1 Series 20 | |
| Top flange | ISO 5211 | |
| Related products | 1. Carbon steel nipples and sockets | 2. Flanges |
| 3. Carbon steel butt-welding fittings | 4. Pipes | |
| 5. High-pressure fittings | 6. Valves | |
| 7. P.T.F.E .thread seal tape | 8. Brass fittings | |
| 9. Ductile iron pipe fittings | 10. Copper fittings | |
| 11. Grooved fittings | 12. Sanitary fittings, etc. | |
| Certificate | BSI, ISO9001:2008 | |
| Applications | Fresh water, sewage, sea water, air, vapor, food, medicine, oils, alkalis, salt etc. | |
| Buyer's drawings or designs are available. | ||
| Package | 1. Cartons without pallets. | |
| 2. Cartons with pallets. | ||
| Or as buyer's requirements. | ||
electric check valve
Advantages
High reliability: The electric actuator can force the valve disc to close, avoiding the failure of the traditional check valve due to impurities blocking; Long life: The corrosion resistance of stainless steel is better than that of cast iron/carbon steel valves.
Limitations
Dependence on external power supply: When the power is off, it needs to rely on backup power or mechanical structure to maintain function; High cost: The electric actuator and split structure make the price higher than ordinary check valves
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