Horizontal check valve CLAPET - 1 "FF; metal-to-metal seal FIV.08401

Product detailed description

This horizontal check valve is commonly installed in heating and plumbing systems where flow reversal prevention is critical. It is typically found in pump circuits, circulation loops, and domestic hot water systems. The compact design allows for integration in tight spaces while maintaining reliable sealing performance. Installers working on commercial or residential systems will find it suitable for use alongside centrifugal pumps, expansion vessels and thermal storage units.

Its metal-to-metal sealing ensures durability in hot water environments. The valve’s brass construction and approval for potable water make it ideal for systems where hygiene and compliance with drinking water standards are required. It is often used in conjunction with pipe sizes standardised for 1-inch connections, ensuring compatibility with existing infrastructure and fittings.

Technical parameters

Material	Brass CW617N ATEST for potable water
Operating temperature	+80 °C
Nominal pressure	PN 10
Code	I08401100
Brand	IVAR

The maximum operating temperature of +80°C and nominal pressure rating of PN 10 define the conditions under which the valve can safely operate. These parameters are essential when selecting the correct component for a given system, particularly in relation to the thermal load and hydraulic stress it will experience during normal operation. The metal-to-metal sealing mechanism is appropriate for applications where a durable and leak-free closure is needed under fluctuating pressure conditions.

Installation and connection

To install the CLAPET horizontal check valve, ensure the pipeline is drained and cleaned of debris. Apply a suitable thread sealing compound to the internal female-female (FF) threads. Align the valve in the direction of flow, indicated on the body, and tighten the connection using an appropriate wrench. After installation, verify the alignment to avoid mechanical stress on the valve body. Common installation errors include incorrect orientation and over-tightening, which can damage the sealing surfaces or compromise the integrity of the connection.

Compatibility and accessories

This valve is compatible with standard 1-inch copper or steel pipework equipped with female-female (FF) threading. For secure installation, ensure that all connecting components such as pipe unions, flanges or fittings are also rated for PN 10 and operating temperatures up to +80°C. Additional components such as isolation valves or pressure-reducing devices may be necessary depending on the specific application requirements.

Technical background for designers

The valve operates by allowing forward flow through the seat and closing automatically when flow reverses. The metal-to-metal seal provides a robust interface between the disc and seat, reducing wear and ensuring long-term sealing capability. The brass CW617N material offers good corrosion resistance in hot water systems, supporting longevity in both closed and open-loop configurations. System designers should consider the pressure drop across the valve when calculating overall circuit losses and ensure the valve is installed in a location accessible for inspection and maintenance.

Service and operation

During regular system checks, inspect the valve for signs of leakage or abnormal noise, which could indicate internal wear or blockage. Ensure the flow direction indicator remains visible and unobstructed. No scheduled maintenance intervals are specified in the manufacturer’s documentation. However, in high-use systems, periodic disassembly and cleaning may be advisable to remove sediment or debris affecting operation.

Frequently asked questions

Can the CLAPET valve be used in a domestic hot water circuit?
Yes, provided the system operates within the stated temperature limit of +80°C and the nominal pressure does not exceed PN 10.

Is the valve suitable for installation in vertical pipelines?
No, the CLAPET valve is specifically designed for horizontal installation only. Vertical mounting may affect the sealing function and cause improper closure.

Does the valve require a separate support bracket during installation?
Support is recommended if the pipe is subject to vibration or movement, particularly near pump outlets. This prevents mechanical stress on the valve body.

Can the valve be manually overridden or adjusted after installation?
No, the CLAPET valve is fully automatic and does not feature any adjustment or manual override mechanisms.