Pressure Reducing Valve - with fitting and pressure gauge - 5/4 "MM IVAR.5350

Product detailed description

This pressure reducing valve is commonly used in residential and commercial buildings to regulate water pressure in heating, plumbing and irrigation systems. It ensures consistent downstream pressure despite fluctuations in the supply line, protecting components such as boilers, heat exchangers and pumps from overpressure damage. Installers often encounter this type of valve in domestic hot water systems, district heating networks and industrial process circuits where reliable pressure management is essential. The compact design allows for easy integration into tight spaces behind panels or in mechanical rooms.

The valve includes a built-in pressure gauge for real-time monitoring of downstream pressure, enabling precise adjustment and verification during commissioning. Its external metric threads simplify connection to standard piping systems, while the brass body provides corrosion resistance and long-term durability. This makes it suitable for both temporary and permanent installations in a variety of system configurations.

Technical parameters

Material	Brass CW602N
Operating temperature	+40 °C
Nominal pressure	PN 25
EAN	8016615077001
Weight	2.63 kg
Code	535071
Brand	IVAR

The maximum operating temperature of +40 °C indicates suitability for systems where thermal expansion is controlled or limited. The PN 25 rating ensures compatibility with medium-pressure supply lines, making it appropriate for municipal water supplies and closed-loop heating circuits. The CW602N brass construction offers good mechanical strength and resistance to moderate chemical exposure, supporting reliable performance in typical domestic and light industrial environments.

Installation and connection

Before installation, ensure the supply line is depressurised and free from debris. The valve is equipped with external metric threads for direct connection to pipe fittings. Align the flow direction arrow on the body with the intended flow path to avoid operational issues. Secure the valve using standard wrenches, ensuring even tightening to prevent leakage. After installation, open the supply slowly and verify the downstream pressure using the built-in gauge. Common installation errors include incorrect orientation, overtightening, or failure to bleed air from the system before commissioning.

Compatibility and accessories

This valve is compatible with standard copper or steel piping systems using metric thread connections. For optimal performance, it should be installed in conjunction with a shut-off valve upstream for isolation and a safety pressure relief valve downstream to prevent overpressure in case of failure. No additional accessories are included with the unit; however, sealing compounds or thread sealant may be required for leak-free connections.

Technical background for designers

The valve operates via a diaphragm mechanism that responds to changes in downstream pressure, adjusting the orifice opening to maintain the setpoint. The CW602N brass body provides structural integrity and thermal stability, while the NBR sealing material ensures flexibility and resilience against minor pressure fluctuations. In closed-loop systems, the valve contributes to energy efficiency by preventing excessive pump work due to uncontrolled pressure surges. Long-term performance depends on regular inspection of the diaphragm and orifice for clogging or wear, particularly in systems with high particulate content or fluctuating temperatures.

Service and operation

Routine checks should include verifying the downstream pressure against the setpoint and inspecting the gauge for accuracy. Ensure the valve remains free from blockages by periodically draining the system or installing a filter upstream. If the pressure deviates from the expected range, recalibration may be necessary. The unit does not require scheduled maintenance intervals beyond these checks, though replacement parts such as the diaphragm or seals can be sourced separately in the event of wear or damage.

Frequently asked questions

Can this valve be used in a domestic hot water system?
Yes, it is suitable for domestic hot water systems provided the operating temperature does not exceed +40 °C. Ensure proper insulation and flow management to maintain efficiency.

Is the pressure gauge adjustable or fixed?
The gauge is fixed and provides a visual indication of downstream pressure. Adjustment of the outlet pressure is done via the valve’s manual setting, not through the gauge itself.

Can this valve be installed in vertical or horizontal orientations?
It can be installed in either orientation, but the flow direction must follow the arrow marked on the body to ensure correct operation and avoid backflow issues.

What is the recommended upstream component to pair with this valve?
A shut-off valve is recommended upstream for isolation during maintenance, and a safety pressure relief valve is advised downstream to protect against overpressure conditions.