Pressure Reducing Valve - with Fittings - 2" FF FIV.08026

Product detailed description

Pressure reducing valves are essential components in systems where downstream pressure regulation is required. This model is commonly used in domestic and commercial heating systems, as well as in industrial water supply lines. Installers typically encounter these valves when working on boiler feed lines, domestic hot and cold water circuits, and in irrigation systems where pressure stability is critical. The valve is designed to handle fluctuating upstream pressures and maintain a consistent lower pressure at the outlet.

In multi-storey buildings or large-scale systems, pressure management is vital to prevent pipe damage and ensure appliance longevity. This valve is often installed at the point of entry to a building or within a distribution manifold to control pressure levels effectively. The CW617N brass construction provides good corrosion resistance and mechanical strength, making it suitable for both wet and dry system applications.

Technical parameters

Material	Brass CW617N
Operating temperature	+85 °C
Nominal pressure	PN 25
Code	I08026200
Brand	IVAR

The operating temperature limit of +85°C makes this valve appropriate for hot water and steam condensate systems. The PN 25 rating indicates it can handle upstream pressures up to 25 bar, while the CW617N brass offers sufficient durability for long-term use. These parameters are essential for determining correct valve sizing and ensuring compatibility with the system’s hydraulic conditions.

Installation and connection

The valve is supplied with integrated fittings for direct installation into a 2-inch FF pipe system. Prior to installation, the system should be depressurised and isolated to prevent accidental flow. The internal FF threads require clean, dry pipe ends and the use of appropriate sealing tape or compound to avoid leaks. A common mistake during installation is incorrect tightening of the fittings, which can lead to leakage or reduced flow efficiency. After installation, the valve should be adjusted to the desired pressure range using the external adjustment mechanism. A pressure gauge should be temporarily connected to verify the setpoint accuracy.

Compatibility and accessories

This valve is compatible with standard FF piping systems and is often used in conjunction with pressure gauges and safety relief valves to form a complete pressure management unit. For a fully functional setup, it is recommended to install a pressure gauge upstream and a safety relief valve downstream. No specific accessories are required for operation, but additional components may be needed depending on the system configuration and local regulations.

Technical background for designers

The valve operates via a spring-loaded diaphragm that responds to downstream pressure changes. As pressure increases, the diaphragm moves to reduce the opening and lower the flow rate, maintaining the set pressure. The CW617N brass body provides good thermal conductivity and resistance to stress corrosion cracking. When integrating into a system, it is important to consider the flow rate and pressure drop across the valve to ensure optimal performance. The valve’s efficiency is influenced by the cleanliness of the fluid and the presence of particulate matter, which can affect the diaphragm’s movement over time.

Service and operation

Regular inspection is recommended to ensure the valve remains free of debris and operates within the set pressure range. No scheduled maintenance intervals are specified, but any signs of pressure deviation or leakage should prompt a system check. The adjustment mechanism should be tested periodically to confirm it remains responsive. If the valve fails to maintain pressure or shows signs of internal wear, it should be replaced according to the manufacturer’s guidelines.

Frequently asked questions

Can this valve be used in a closed-loop heating system?
Yes, provided the system operates within the valve’s temperature and pressure limits. The CW617N brass is suitable for closed-loop environments.

Is it necessary to install a filter upstream of the valve?
A filter is recommended to prevent particulate matter from entering the valve and interfering with the diaphragm mechanism.

Can the valve be adjusted after installation?
The external adjustment mechanism allows for post-installation calibration to the required pressure setting.

What should be done if the valve fails to regulate pressure correctly?
Check for blockages in the inlet and outlet ports, and inspect the diaphragm for wear. If issues persist, replacement is advised.