Check valve EURA light - 6/4 "FF; Kv 24,35 FIV.08030

Product detailed description

This check valve is commonly used in heating, plumbing and pump systems to prevent backflow when pumps are switched off or during system pressure drops. It is suitable for installations in residential, commercial and industrial buildings where directional flow control is required. The valve ensures system integrity by maintaining flow direction and minimising energy loss from reverse flow. It is often installed in pump circuits, circulation loops and irrigation systems where unidirectional flow is critical.

Its compact design and low opening pressure make it ideal for low-pressure applications. The valve is particularly useful in systems with variable flow rates or intermittent operation, where it prevents pressure surges and ensures stable operation. It is commonly found in systems where flow reversal could cause damage or inefficiency, such as in closed-loop heating circuits or pump-fed water supply lines.

Technical parameters

Material	Brass CW617N
Opening overpressure	0.02 bar
Code	I08030112
Brand	IVAR

The opening overpressure of 0.02 bar ensures the valve opens at minimal pressure differentials, making it suitable for low-pressure systems. The material selection (brass CW617N and polymer orifice) provides resistance to corrosion and wear, while the internal FF thread ensures secure and leak-free connections. These parameters are essential for determining compatibility with system pressures and media, as well as for proper sizing during design and installation.

Installation and connection

The valve is installed in a straight section of pipe with no bends or obstructions upstream or downstream. The internal FF thread requires matching female fittings for secure assembly. Installers should ensure the direction of flow is aligned with the arrow marked on the valve body. Common installation mistakes include reversing the flow direction or failing to clean the threads before tightening. A torque wrench should be used to avoid over-tightening, which can damage the sealing surfaces. After installation, a pressure test should be performed to confirm the system is leak-free and the valve operates as intended.

Compatibility and accessories

The valve is compatible with standard FF-threaded pipe systems and is suitable for use with water and other non-aggressive fluids. It can be integrated with pump units, circulation pumps and pressure switches in closed-loop systems. No additional accessories are required for basic operation, but in complex systems, it may be used in conjunction with pressure relief valves or flow meters. No related products are specified for this model.

Technical background for designers

The valve operates on a simple principle: when the forward flow reaches the opening overpressure, the polymer orifice lifts slightly, allowing flow to pass. When the flow stops or reverses, the orifice returns to its seated position, sealing the system. The brass CW617N body offers good mechanical strength and resistance to thermal expansion, making it suitable for systems operating at up to +80 °C. The polymer orifice reduces friction and wear, ensuring long-term reliability. The valve is designed to integrate into systems with low-pressure differentials, where minimal flow resistance is required. The service life and efficiency are influenced by the operating temperature, flow velocity and media purity.

Service and operation

The valve requires no regular maintenance under normal operating conditions. However, periodic visual inspections are recommended to check for signs of wear, corrosion or blockage. If the system is operating in a high-sediment environment, the valve should be disassembled and cleaned periodically to ensure the orifice remains free of debris. No specific service intervals are provided in the brief.

Frequently asked questions

Can the valve be used in a closed-loop heating system?
Yes, the valve is suitable for closed-loop systems where directional flow control is required. It is designed for temperatures up to +80 °C and is compatible with standard FF-threaded connections.

Is the valve suitable for use with aggressive fluids?
No, the valve is intended for use with non-aggressive fluids such as water. The polymer orifice and brass body may not be suitable for highly acidic or alkaline media.

Can the valve be installed in a vertical position?
Yes, the valve can be installed in either horizontal or vertical orientation, provided the flow direction aligns with the arrow on the body and the system is properly supported.

Does the valve require a pressure regulator in the system?
Not necessarily. The valve operates at low overpressure and is suitable for systems with stable pressure levels. A pressure regulator may be required if the system experiences significant pressure fluctuations.