Horizontal check valve CLAPET - 4" FF; metal-to-metal seal FIV.08401

Product detailed description

Horizontal check valves are essential components in closed-loop water systems such as heating, plumbing and pump circuits. They prevent reverse flow when pumps stop or fail, ensuring system integrity and efficiency. This valve is commonly installed in residential and commercial buildings, especially in applications involving circulating pumps, make-up water lines and irrigation systems. Installers should consider flow direction and system pressure when positioning the valve to avoid operational issues.

The I08401400 model is suited for medium-pressure systems with continuous flow requirements. It is typically used in systems where a robust sealing solution is required and where soft seals might degrade over time due to thermal cycling or chemical exposure. Its internal threading allows direct connection to standard piping without additional fittings, streamlining installation in tight spaces.

Technical parameters

Material	Brass CW617N ATEST for potable water
Operating temperature	+80 °C
Nominal pressure	PN 10
Code	I08401400
Brand	IVAR

The nominal pressure rating of PN 10 indicates the valve is suitable for systems operating under moderate hydraulic stress, while the maximum operating temperature of +80°C defines its suitability for hot water applications. The CW617N brass construction ensures compatibility with potable water systems certified under ATEST standards. These parameters are critical for correct sizing and selection to ensure long-term performance and compliance with system design specifications.

Installation and connection

The valve is equipped with internal female threading (FF) for direct connection to standard pipe fittings. Prior to installation, verify that the pipe threads are clean and free of debris. Apply a suitable sealing compound or tape to the threads to ensure a leak-free connection. Ensure the valve is oriented correctly, with the flow arrow aligned with the intended direction of fluid movement. Common installation errors include incorrect orientation, which can cause flow restriction or premature seal failure. After installation, perform a visual inspection and pressure test to confirm proper seating and sealing.

Compatibility and accessories

This valve is compatible with standard copper and steel piping systems using internal threading. For non-metallic or larger-diameter systems, additional adapters or transition fittings may be necessary. No specific accessories are required for operation, but it is recommended to install a filter upstream to prevent particulate matter from damaging the sealing surfaces. Related models include the FIV.08406 variant with a soft disc seal, suitable for applications requiring lower friction resistance.

Technical background for designers

The valve operates via a hinged disc mechanism that opens under forward flow and closes under reverse flow. The metal-to-metal seal provides a durable and reliable barrier against leakage, particularly in systems with frequent thermal expansion and contraction. CW617N brass offers high corrosion resistance and maintains structural integrity at elevated temperatures. To maximise service life, ensure the system is free from abrasive particles and that the valve is not subjected to continuous high-pressure surges beyond its rated PN 10. Proper integration into the system layout also minimises stress on the valve body and connection points.

Service and operation

Routine maintenance includes periodic inspection of the sealing surfaces for wear or corrosion. In systems with high particulate load, consider scheduled cleaning of the valve interior to prevent blockage or misalignment. No specific service intervals are provided in the technical documentation, but performance should be monitored during routine system checks. If flow restriction or leakage is detected, disassemble the valve and inspect for damage or deformation of the sealing surfaces.

Frequently asked questions

Can this valve be used in a domestic hot water system?
Yes, the valve meets ATEST standards for potable water and is rated for operation up to +80°C, making it suitable for domestic hot water systems.

Is it compatible with copper piping?
Yes, the internal female threading allows direct connection to copper piping using standard compression or threaded fittings.

What is the difference between FIV.08401 and FIV.08406 models?
The FIV.08401 model uses a metal-to-metal seal for durability, while the FIV.08406 model employs a soft disc seal for smoother operation in low-friction environments.

Can this valve be installed vertically?
No, the valve is designed for horizontal installation only. Vertical orientation may affect the sealing mechanism and lead to improper operation.