Check valve Comap 1/2" - straight return valve with adjustable setpoint and flow shut-off (PWE)2429E

The Comap Check Valve 1/2" (straight return valve, model PWE2429E) is a compact inline return valve designed for hydronic heating and cooling systems. Installed on return pipes, it provides a combined check function with an adjustable setpoint and a manual flow shut-off to enable controlled balancing and isolation of circuits during commissioning, maintenance, or adjustments in residential and light commercial installations.

Advantages

This straight return valve integrates a non-return function with an adjustable threshold, allowing precise control of backflow prevention while maintaining predictable hydraulic behaviour. The manual flow shut-off lets technicians isolate a circuit quickly for service or measurement without disturbing other parts of the system. Its compact design and straightforward inline mounting reduce installation time and space requirements, and the construction is suited to standard 1/2" pipe connections common in domestic and small commercial hydronic networks.

Suitable for

• Balancing return lines in domestic and light commercial heating systems
• Preventing backflow and setting a controlled return flow threshold
• Isolating individual circuits for commissioning and maintenance
• Use in hydronic cooling circuits with compatible fluids and temperatures

Key specifications

• Connection size: 1/2" suitable for standard threaded or compatible fittings
• Type: straight return (check) valve with adjustable setpoint and manual shut-off
• Mounting: inline on return pipe
• Functions: non-return (check), adjustable opening threshold, manual flow shut-off for isolation
• Application: designed for heating and cooling hydronic circuits in residential and light commercial systems

How to use

Install the valve inline on the return pipe according to flow direction markings, ensuring compatible thread type and proper sealing. Adjust the setpoint to the required threshold for backflow prevention and hydraulic balancing during commissioning. Use the manual shut-off to isolate the circuit when performing maintenance or when measuring flow and pressure values. After adjustment or service, verify system operation and check for leaks at the connections.

Usage recommendations

Ensure compatibility of system fluid, pressure and temperature ranges before installation. During installation and adjustments, follow local plumbing standards and manufacturer instructions for torque and sealing. When balancing multiple circuits, adjust setpoints incrementally and verify performance with appropriate measuring tools; perform periodic inspections to confirm correct valve operation and tightness.