Flanged Horizontal Check Valve - Series M6 Stainless Steel with Spring - DN 200; L=36mm BRA.M6.623 PR

Product detailed description

This stainless steel flanged check valve is commonly used in heating and ventilation systems, compressed air installations, and liquid hydrocarbon transport networks. The horizontal design allows for efficient flow control in systems where space constraints require a compact layout. Installers typically encounter this valve in central heating systems, industrial process lines and water distribution infrastructure where directional flow control is essential.

The spring-assisted closure mechanism ensures rapid shut-off when reverse flow occurs, reducing the risk of hydraulic hammer effects. The valve is suitable for both vertical and horizontal mounting between flanges according to EN 1092-1 standards. The operating temperature range spans from -20°C to 200°C, making it adaptable to both cold and hot fluid applications.

Technical parameters

Installation and connection

Mounting requires alignment between mating flanges using bolted connections according to EN 1092-1 specifications. Ensure flange faces are clean and free of debris before tightening bolts evenly in a crisscross pattern to prevent uneven stress. Verify that the spring mechanism operates freely after installation by manually rotating the disc. Common mistakes include misalignment of flange faces and incorrect torque application, which can cause leakage or mechanical failure.

Compatibility and accessories

This valve is compatible with flanged piping systems rated PN6, PN10 and PN16. When installing in potable water systems, confirm compliance with local regulations.

Technical background for designers

The valve operates through a spring-loaded disc that lifts under forward flow and closes rapidly when flow reverses. The stainless steel body resists corrosion from water and hydrocarbons, while the PTFE sealing surface provides low friction and long-term integrity. The operating temperature limit is determined by the thermal stability of the PTFE seal and spring material. System designers should consider the minimum closing pressure of 0.3 bar to ensure proper sealing in low-pressure return lines.

Service and operation

Periodic inspection is recommended to verify smooth disc movement and seal integrity. Clean internal surfaces if contamination is suspected, particularly in systems transporting glycol-water mixtures. Check for signs of wear on the spring and seating surface during routine maintenance. No scheduled service intervals are specified beyond visual inspections during system shutdowns.

Frequently asked questions

Can this valve handle 50% glycol-water mixtures?
Yes, it is approved for water with up to 50% glycol content, provided the mixture remains within the temperature range of -20°C to 200°C.

Is steam service possible with this model?
No, the valve is explicitly stated as unsuitable for steam applications due to limitations in the sealing materials and spring characteristics.

What is the maximum allowable pressure difference for operation?
The valve is rated for a maximum working pressure of 6 bar as defined by the PN 6 classification. Exceeding this could compromise structural integrity.

Does the valve require orientation during installation?
Yes, the valve must be installed with the flow direction indicated on the body to ensure correct function of the spring-loaded closure mechanism.