Rubber Flap Swing Check Valve
The KV Controls RDCV Rubber Flap Swing Check Valve provides automatic backflow prevention for clean water and sewage applications. Its resilient flap and 45-degree inclined seat help support quick closure and reduce valve slam. The double-flanged design includes a removable bonnet for maintenance access. The range covers DN50–DN600, with EPDM or NBR lining options.
RDCV Rubber Flap Swing Check Valve for Water and Sewage
The KV Controls RDCV is an automatic non-return valve designed to prevent reverse flow in water networks and pumping systems. Its rubber-encapsulated, reinforced flap opens under forward flow and returns to the inclined seat as flow decreases or reverses.
The 45-degree seat arrangement assists closure, helping reduce slamming and associated pressure surges. A removable bonnet provides access to internal components for inspection and maintenance.
Features and Benefits
- Automatic backflow prevention: Helps protect pumps and connected pipework against reverse flow.
- Resilient flap construction: A rubber-encapsulated, reinforced disc provides a resilient sealing surface.
- Inclined seat: The 45-degree arrangement supports quick closure to help reduce valve slam.
- Double-flanged connections: Provides a bolted connection to compatible pipeline flanges.
- Maintenance access: The bonnet can be removed to access internal components.
- Protective epoxy coating: Helps protect coated surfaces against corrosion.
- Lifting provisions: Body lifting holes assist handling and installation.
Typical Applications
The RDCV range is intended for:
- Clean water and sewage pumping systems.
- Water supply networks.
- Water treatment and distribution systems.
- Tank-connected pipework.
- Power-station cooling lines.
Technical Specifications
| Parameter | Catalogue specification |
|---|---|
| Size range | DN50–DN600 |
| Nominal pressure options | PN10, PN16 and PN25 |
| Connection type | Double flanged |
| Body and bonnet | EN GJS 500-7 ductile iron, as listed in the material schedule |
| Flap construction | Steel reinforcement with EPDM or NBR encapsulation |
| Stated EPDM temperature range | −10°C to +80°C |
| Stated NBR temperature range | −10°C to +60°C |
| Face-to-face reference | BS 5153 |
| Flange drilling references | EN 1092-2 / ISO 7005-2 |
| Testing reference | EN 12266-1 |
| Stated seat leakage criterion | ISO 5208 Rate A |
| Coating | Thermoplastic powder epoxy |
Material combinations, pressure ratings and allowable operating temperatures require confirmation for the selected configuration. The stated leakage criterion describes catalogue testing requirements rather than guaranteed performance under all service conditions.
Selecting Your RDCV Valve
Confirm the medium, solids content, flow rate, operating pressure, temperature and installation orientation before selection. Install according to the flow-direction arrow and the approved installation instructions.
The effect on pressure surges depends on the complete pumping system and its operating conditions.
Contact KV Controls for an RDCV quotation and confirmation of the configuration suited to your water or sewage application.
KV Controls RDCV Swing (Rubber Flap) Check Valve BS5153 – Catalogue
