Safety valve IVAR.PV 311, 3/4" FF, 8 bar

Product detailed description

Heating systems in residential and commercial buildings require reliable pressure management to ensure safe and efficient operation. Safety valves play a critical role in this process by releasing excess pressure when system limits are exceeded. Installers and service technicians working on central heating systems, including boilers, heat exchangers and circulation loops, must select components that match the system's hydraulic and thermal requirements. The IVAR.PV 311 safety valve is suitable for integration into such systems, where it provides protection against overpressure conditions that could otherwise lead to damage or failure.

Correct sizing and installation of safety valves are essential for maintaining system integrity. The valve must be selected to match the maximum allowable pressure and temperature of the system, as well as the flow characteristics of the media being handled. In multi-zone or large-scale heating systems, the valve must also account for potential pressure fluctuations caused by pump operation or thermal expansion. The IVAR.PV 311 is designed to operate within a defined pressure range and is compatible with typical heating system configurations.

Technical parameters

Material	Brass CW617N
Operating temperature	+5 °C
Nominal pressure	PN 10
EAN	8016615003703
Weight	0.188 kg
Code	311580
Brand	IVAR

The technical parameters of the IVAR.PV 311 are crucial for correct system integration. The CW617N brass construction ensures resistance to corrosion and wear, making it suitable for long-term use in heating environments. The nominal pressure rating of PN 10 indicates the valve's ability to handle system pressures up to 10 bar under normal operating conditions. The operating temperature range from +5 °C to +110 °C allows the valve to function effectively in a wide range of heating applications.

Installation and connection

The IVAR.PV 311 is equipped with a 3/4 inch FF (female flange) connection, which requires a matching male flange on the system piping. Installers should ensure that the flange surfaces are clean and free from debris before tightening the bolts to the manufacturer's recommended torque. It is important to verify that the valve is installed in the correct orientation, with the discharge direction aligned to allow unobstructed flow of the released media. Common installation errors include incorrect flange alignment, insufficient tightening of bolts, and failure to check for leaks after installation. These issues can compromise the valve's performance and safety function.

Compatibility and accessories

The IVAR.PV 311 is compatible with standard heating system components that use PN 10 pressure ratings and 3/4 inch FF connections. It is typically used in conjunction with pressure-reducing valves, expansion vessels and temperature sensors to form a complete pressure management system. When installing the valve, it may be necessary to order additional components such as flange gaskets, mounting brackets or pressure gauges to ensure full system functionality. No related products are available for this model.

Technical background for designers

The IVAR.PV 311 operates on a spring-loaded principle, where the internal spring holds the valve closed until the system pressure exceeds the set opening pressure. The CW617N brass material offers good mechanical strength and resistance to thermal expansion, making it suitable for use in heating systems. The valve's performance is influenced by factors such as the spring tension, the internal flow path and the media viscosity. Designers should consider the system's maximum operating pressure and temperature when selecting the valve, as well as the required flow capacity during pressure release. Proper integration into the system ensures that the valve responds quickly and effectively to overpressure events.

Service and operation

Regular inspection of the IVAR.PV 311 is recommended to ensure continued performance and safety. Installers should check for signs of wear, corrosion or blockage in the valve's internal components, as well as verify that the flange connections remain tight and leak-free. No specific service intervals are provided in the brief, but maintenance should be carried out in accordance with the manufacturer's technical data sheet. If the valve fails to open or close correctly, it should be replaced immediately to prevent potential system damage or safety hazards.

Frequently asked questions

Can the IVAR.PV 311 be used in systems with a temperature above +110 °C?
No, the operating temperature range is specified as +5 °C to +110 °C. Exceeding this range may affect the valve's performance and integrity.

Is the IVAR.PV 311 compatible with systems using glycol-based heat transfer fluids?
According to the manufacturer's technical data sheet, the valve is suitable for use with water-based media. Compatibility with glycol-based fluids should be confirmed with the manufacturer.

Can the IVAR.PV 311 be adjusted to a different opening pressure?
No, the valve is supplied with a fixed opening pressure range from 2.5 to 8 bar. Adjustments are not possible without modifying the internal spring mechanism, which is not recommended.

What should be done if the valve discharges frequently under normal operating conditions?
This may indicate an overpressure condition in the system. The pressure source should be checked, and the system's pressure regulation components should be reviewed for proper function.