PVC Double Union Check (Non-Return) Valve

Industrial PVC Double Union Check Valve – High-Pressure Non-Return Valve for Pump Protection & Water Treatment (20mm – 63mm)

The Fail-Safe Solution for Pump Systems

Backflow is the leading cause of pump failure and system contamination. The PVC Double Union Check (Non-Return) Valve provides a robust mechanical barrier that allows water to flow in one direction only. When the pump stops, the valve closes instantly, preventing the “water hammer” effect and keeping the pump primed. In Sri Lanka’s agricultural and industrial sectors, this valve is essential for ensuring that water doesn’t drain back into the well or tank.

Key Features & Benefits:

• Double Union Convenience: Unlike standard check valves that are glued permanently into place, the double union design features threaded collars. If the valve gets blocked by sand or debris, you can simply unscrew the union nuts, clean the internal mechanism, and put it back—saving you the cost of replacing pipes.

• Superior Pump Protection: By maintaining a column of water in the suction pipe, this valve keeps your pump primed and ready for the next cycle. This prevents dry-running and extends the life of your motor and impellers.

• Corrosion & Chemical Resistance: Manufactured from premium PVC, these valves are immune to rust and resistant to common agricultural chemicals and fertilizers. They are perfectly suited for the humid and coastal conditions of Sri Lanka.

• Versatile Installation: These valves can be installed both horizontally and vertically (upward flow), making them adaptable to tight plumbing manifolds in guesthouses, factories, or home pump sheds.

• Bubble-Tight Sealing: Equipped with industrial-grade EPDM O-rings and a precision-engineered spring or ball, the valve ensures a zero-leakage shut-off even under low back-pressure.

Typical Applications in Sri Lanka:

• Domestic Water Pumps: Keeping the pump primed and preventing tank water from flowing back into the well.

• Industrial RO Plants: Protecting high-pressure membranes from back-pressure surges.

• Commercial Swimming Pools: Ensuring water flows correctly through the filtration and heating loops.

• Modern Agriculture: Essential for fertigation and drip irrigation systems to prevent chemical backflow into the water source.

Technical Specifications: