PPRC Brass Stop Valve
Engineered for reliable flow control in modern plumbing systems, the PPRC Brass Stop Valve combines a heavy-duty, corrosion-resistant brass internal mechanism with a durable Polypropylene Random Copolymer (PPRC) socket body. It provides leak-proof shutoff capabilities for both hot and cold water distribution lines in residential, commercial, and industrial installations.
Technical Specifications
| Parameter | Specification |
| Stem & Core Material | High-grade forged brass spindle with chrome-plated flange collar |
| Handle Type | Ergonomic multi-turn wheel handwheel with OPEN/CLOSE indicator cap |
| Sealing Element | High-density EPDM rubber seat washer and dual internal O-rings |
| Pressure Rating | PN20 / PN25 (Working pressure up to 2.5 MPa) |
| Operating Temperature | -10°C to 95°C (Hot and cold water compatible) |
| Joint Type | Threaded brass core insertion for heat-fusion PPR valve bodies |
Working Principle
The PPRC stop valve operates via a linear screw-down motion:
- Opening Flow: Rotating the handwheel counter-clockwise turns the internal brass spindle, lifting the bottom rubber washer off the internal valve seat. This opens the channel and allows unobstructed fluid movement through the valve cavity.
- Closing & Isolation: Rotating the handwheel clockwise advances the threaded spindle downward. The rubber washer compresses tightly against the valve seat, interrupting flow completely.
- Leak Prevention: The upper stem features precision-fit O-rings beneath the chrome sleeve, preventing fluid from seeping through the top spindle threads even under elevated system pressure.
Key Features & Applications
- Corrosion Resistance: Premium brass internals resist lime scale buildup, rust, and chemical degradation in treated water supplies.
- Maintainable Spindle Unit: The internal core and handwheel can be unthreaded and removed from the main inline PPR body for easy washer replacement without cutting pipes.
- Clear Directional Control: The top cap features clear arrow markers for clockwise closing and counter-clockwise opening during emergency shut-offs.
- Common Uses: Main utility shut-off valves, concealed bathroom fixtures, kitchen supply manifolds, solar water heating systems, and HVAC water circuits.