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Shut-off valves and valves are used in heating systems, heat pump installations, boilers and hydronic pipe networks. They make it possible to isolate parts of the installation, control flow, mix water in a controlled way or keep components accessible for service.
At Hewa, you will find shut-off valves and valves for installation, maintenance, renovation and technical replacement. When selecting the right version, check connection size, material, pressure class, temperature suitability, flow direction and the specific function within the system.
Brands
Pentec Duco - Inlet combination valve 15 x 15 mm (6 BAR)
Item no. 428399EAN 8717065000570
Price excl. VAT€ 18,97Price incl. VAT€ 22,95
In stock
Added
Pentec Duco Mix 15C - Mixing valve 15 mm compression
Item no. 429001EAN 8717065023432
Price excl. VAT€ 33,02Price incl. VAT€ 39,95
In stock
Added
ThermoVar 512240581 - Loading valve 1" female thread (+61°C)
Item no. 345728EAN 7330147126497
Price excl. VAT€ 100,00Price incl. VAT€ 121,00
In stock
Added
HydroMix Mixing Valve - Domestic Hot Water +35 to +65 °C (15 mm)
Item no. 430415EAN 8721082877602
Price excl. VAT€ 72,30Price incl. VAT€ 87,48
Low stock
Added
Selecting a shut-off valve and valve
Shut-off valves and valves have different functions within a heating installation. A shut-off valve is mainly used to isolate a pipe section, appliance or component for service or replacement. A valve may also be used for control, mixing, flow management, safety or a specific hydraulic function.
When selecting a valve, application, connection size, flow capacity, material, pressure class, temperature class and installation position are key factors. Also check whether the component is intended for heating water, domestic water, boiler installations, heat pump systems or a specific application such as mixing, venting, filling or loading.
Important when choosing shut-off valves and valves
- Check the correct connection size, such as compression, female thread or male thread
- Match material and sealing to heating water or domestic water
- Check pressure class, temperature class and maximum load
- Determine whether the component is intended for isolation, control, mixing or safety
- Check the flow direction when it is marked on the valve
- Ensure sufficient accessibility for maintenance and replacement
- Have installation carried out by a qualified installer
Isolation, control and safe connection
Shut-off valves and valves are often combined with other components in heating systems, heat pumps, boilers and pipework. For a service-friendly installation layout, ball valves for isolation and maintenance, 2-way and 3-way valves for control and check valves against unwanted backflow are also relevant components within the same system.
The correct combination of shut-off valves, valves and control components makes maintenance easier and helps manage flow in the system correctly. This is important in installations with multiple zones, mixing groups, buffer tanks, boilers, heat exchangers or heat pumps.
Frequently asked questions about shut-off valves and valves
What is a shut-off valve used for?
A shut-off valve is used to isolate part of the installation. This allows a component to be maintained, replaced or inspected without always interrupting the entire system.
What is the difference between a shut-off valve and a valve?
A shut-off valve is mainly intended to open or close flow. A valve may also have a controlling, mixing, safety or flow-related function, depending on the version.
What should I check when selecting a valve?
Check connection size, application, material, pressure class, temperature class, flow direction and suitability for the medium. Also check whether the valve matches the hydraulic function within the installation.
Can a shut-off valve or valve be used with a heat pump?
Yes, shut-off valves and valves are frequently used in heat pump systems. The version must be suitable for the system pressure, temperature, flow rate and installation position.
When should a shut-off valve or valve be replaced?
Replacement is recommended if the component leaks, does not close correctly, is stuck, damaged or no longer matches the technical requirements of the installation. Inspection during service and maintenance is therefore important.