Swing check valve 1/2" with silencer

Product detailed description

This swing check valve is commonly used in residential and commercial heating systems, including central heating circuits and domestic hot water installations. It is installed in pipelines to ensure unidirectional flow and prevent damage from backflow. The valve is compact, with a body length of 47 mm and a height of 51 mm, making it suitable for tight spaces in mechanical rooms, under sinks, or in wall-mounted systems. The brass construction ensures durability and corrosion resistance in environments with fluctuating temperatures and pressures.

Designed for use in systems where flow reversal could disrupt operation or damage components, this valve is ideal for installations involving circulating pumps, mixing valves, and heat sources. The built-in silencer minimises mechanical noise during closure, which is particularly important in noise-sensitive areas such as residential buildings or office spaces. The automatic operation of the valve eliminates the need for manual intervention, ensuring reliable performance in both new and retrofit projects.

Technical parameters

Thread	G1/2 inch
Body length	47 mm
Height	51 mm
Nominal pressure	10 bar
Maximum operating temperature	100 °C
Working medium	hot and cold water
Material	brass
EAN	5900308746417
Certificate	conformity declaration is provided
Code	ZZ-KL15
Brand	Hydroland

The nominal pressure of 10 bar and maximum operating temperature of 100°C define the valve's suitability for hot and cold water systems. These parameters are essential for selecting the correct valve size and material to match the system's hydraulic and thermal conditions. The G1/2 inch thread ensures compatibility with standard pipe sizes in plumbing and heating applications. The compact dimensions are also important for fitting the valve into existing layouts without requiring major modifications.

Installation and connection

The valve is installed directly into the pipeline using a G1/2 inch thread. Ensure the pipeline is clean and free of debris before threading to avoid leaks. Apply thread sealant or PTFE tape to the male thread for a secure connection. The valve must be oriented correctly with the flow direction marked on the body to ensure proper operation. Common installation errors include incorrect orientation, which can lead to improper sealing and potential backflow, and over-tightening the thread, which may damage the valve body or sealing surfaces. Always verify the direction of flow and check for tightness after installation.

Compatibility and accessories

This valve is compatible with standard plumbing and heating systems using copper or plastic pipes with G1/2 inch connections. It can be used in conjunction with other components such as pressure-reducing valves, flow meters, and temperature sensors. For larger systems, consider using the Swing check valve 3/4 inch, 1 inch, 5/4 inch, 6/4 inch, or 2 inch models depending on the flow rate and pipe size. No additional accessories are required for basic installation, but a wrench or pipe threader may be needed for assembly.

Technical background for designers

The valve operates using a swing disc mechanism. When flow is in the correct direction, the disc opens freely under the force of the water. When flow reverses, the disc swings shut, sealing against the valve seat to prevent backflow. The built-in silencer reduces the speed of the disc's closure, minimising mechanical stress and noise. The brass body provides good thermal conductivity and resistance to corrosion, making it suitable for both hot and cold water. The valve's compact size allows for integration into tight spaces without affecting system performance. Long-term efficiency depends on maintaining the correct operating temperature and pressure within the system's design limits.

Service and operation

The valve requires minimal maintenance due to its automatic operation and durable construction. Periodically inspect the valve for signs of wear, such as leaks or unusual noise during closure. If the silencer becomes damaged or the disc fails to close properly, the valve should be replaced. No scheduled service intervals are specified in the technical documentation, but regular visual checks are recommended during system maintenance. Ensure the valve is not exposed to temperatures or pressures exceeding its rated limits to avoid premature failure.

Frequently asked questions

Can the Hydroland ZZ-KL15 be connected to a copper pipe with a G1/2 inch thread?
Yes, the valve is designed for G1/2 inch threaded connections and is compatible with copper pipes. Ensure the thread is properly sealed with PTFE tape or thread sealant.

Is the valve suitable for use in a domestic hot water system?
Yes, the valve is rated for hot and cold water up to 100°C and can be used in domestic hot water systems to prevent backflow and protect components such as pumps and mixing valves.

Can the valve be used in a closed-loop heating circuit?
Yes, the valve is suitable for closed-loop heating circuits where unidirectional flow is required. It prevents reverse flow and protects the system from potential damage caused by water hammer.

Does the valve require a separate mounting bracket?
No, the valve is installed directly into the pipeline using the G1/2 inch thread and does not require a separate mounting bracket. Ensure the pipeline is stable and properly supported to avoid stress on the valve.