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Building services valves
A wide range of valves is available for controlling the flow of cold water, hot water, air and steam in heating, air conditioning, ventilation and water supply systems. Read More
Pressure balancing valves (PBVs) measure and balance flow rates in heating and cooling systems, ensuring that the desired rate is achieved irrespective of any pressure changes within the system.
Thermostatic balancing valves (TBVs) ensure thermal balance in hot water systems. Controlling temperature levels helps reduce running costs, as well as protecting against Legionella.
Thermostatic mixing valves (TMVs) blend hot and cold water, reducing the risk of scalding at baths and washbasins. They are also used to control water temperature across a series of hot water outlets.
Pressure reducing valves (PRVs) reduce the mains pressure if it is too high, protecting pipes, valves and equipment against damage caused by excessive water pressure.
There are also specific thermostatic and manual valves for controlling radiators .
Building services valves - helping you find the best solution for your project.
Wavin HepVO Osma self sealing waste valve
HepvO® self-sealing waste valve prevents the escape of foul sewer air from waste discharge systems, and maintains pressure equilibrium in soil and waste installations. Uses a purpose designed silicone rubber membrane membrane to create an airtight seal between the living space and the drainage system. Self-sealing valve opens under the water
- The Frese OPTIMA Compact DN50-DN300 pressure independent balancing and control valve (PIBCV) is used in heating and cooling systems with air handling units, heat exchangers or mixing circuits. Used in a wide variety of market sectors, including commercial office developments, hotels, educational establishments, sports complexes and residential
- The TA-THERM thermostatic valve is used for automatic balancing in domestic hot water circulating systems, which are used in most large buildings to reduce the delay time for water to run hot at the tap. The TA-THERM valve is fitted in place of a conventional balancing valve and is made from AMETAL®, a dezincification-resistant alloy that
- PRODUCT
- IMI Hydronic Engineering
MODULA Direct terminal bypass unit
Visit siteThe MODULA Direct valve system from Frese combines the company's range of OPTIMA Compact pressure independent and temperature control valves with isolation, flushing, draining and measurement components within a prefabricated, tested and ready-to-install terminal bypass unit. MODULA Direct is supplied with an integral venturi metering station forRL1 return valves
Visit siteRL1 return valves are suitable for hot water heating systems. They are available in straight and angled versions. Valves are nickel plated and equipped with special sockets, with the option of either a threaded pipe or calibrated soft steel or copper pipe connection, the latter two by means of a compression union. Closing is performed by a valve- PRODUCT
- Herz Valves UK
TS-98-V thermostatic valves
Visit siteThe TS-98-V thermostatic valve has continuous pre-setting and readout, and is suitable for water heating systems in which hydraulic balancing via return valves is not possible or desired. The universal models are equipped with special sockets that offer the option of connecting either a threaded pipe or a calibrated soft steel or copper pipe, the- PRODUCT
- Herz Valves UK
DZR compression ball valves
Visit siteDZR compression ball valves are made from corrosion-resistant forged brass to EN 12420. The ball of the valve has a chrome-plated finish. The spindle is in brass and the handle is made from galvanised steel. Compression fitting ends are to BS 864/2. The valves are pressure rated to PN16- PRODUCT
- Herz Valves UK
TemCon domestic hot water thermostatic valve
Visit siteThe CirCon thermostatic valve in stainless steel AISI 316 is used for domestic hot water systems with circulation. A by-pass outside the thermal part of the valve allows the temperature to be raised to between 70°C and 80°C, making it suitable for hot water installations with bacterial problems such as legionella. It has a stepless setting between 37°C and 65°C with an accuracy of +/-2°CTBV-C terminal balancing valve
Visit siteThe TBV-C terminal balancing valve for on/off control is designed for use in terminal units in heating and cooling systems. The valve is made from AMETAL®, a dezincification-resistant alloy that minimises the risk of leakage. The valve has a shut-off function to ensure straightforward maintenance, and self-sealing measuring points for quick and- PRODUCT
- IMI Hydronic Engineering
- The Frese PV-SIGMA Compact system is a dynamic valve arrangement designed to regulate flow and differential pressure. The Frese PV-SIGMA Compact system can be installed in both domestic and commercial heating and cooling systems. Available in sizes from DN15 to DN50. Max. flowrate 10.3m3/h, max. differential pressure 400kPa. Made from DZR brass (DN15-32) or ductile iron (DN40-50
Semi-lugged regulating butterfly valves
Visit siteHigh-quality loose liner butterfly valves are designed in accordance with EN 593 and feature extended necks for insulation. The valves are semi-lugged. Suitable for water and air systems in heating, cooling, air conditioning and ventilation as well as fire fighting and agricultural applications, the valves are in accordance with ISO 9001- PRODUCT
- Herz Valves UK
STAP differential pressure controller
Visit siteThe compact STAP self-acting differential pressure controller is suitable for use in heating and cooling systems. The valve is made from AMETAL®, a dezincification-resistant alloy that reduces the risk of leakage. It keeps the differential pressure over the load constant which delivers accurate and stable control. This ensures minimal noise from- PRODUCT
- IMI Hydronic Engineering
Brass drain cock
Visit siteThe brass drain cock is PN10 pressure rated and suitable for boiler filling and draining applications. It can be used for installations with cold or hot water. The filling cocks, draining cocks and hose connections are supplied in brass. The design of the O-Ring and cup spring prevent any water leakages. The drain cock moves smoothly and precisely- PRODUCT
- Herz Valves UK
Pressure reducing valves
Visit siteHerz pressure reducing valves are WRAS approved and made to BS EN 1567. The valves are suitable for water heating and cooling applications. Pressure reducing valves are made from either DZR brass or cast gunmetal. Technical data: Maximum fluid temperature: 80°C. Maximum inlet pressure: 25 bar. Adjustable pressure range: 1.5-6 bar. Pressure- PRODUCT
- Herz Valves UK
- The ACO Triplex® with chamber is an in-line Type 2 passive anti-flooding device designed for grey water (non-faecal) connections. It has its own access chamber and conforms to the requirements of BS EN 13564. The ACO Triplex® installs into solid floor constructions with connections to 110mm or 160mm Ø drain pipe. It has a height adjustable access
- PRODUCT
- ACO Building Drainage Ltd
DZR Ball Valve Extended Stem
Visit siteAvailable in sizes from DN15 to DN50 (larger sizes available on request), Herz supplies high-quality ball valves with extended spindles for isolating functions. The valves are suitable for use with all non-aggressive media such as water, oil, air, steam, fuel oil and lubricating oil. They are manufactured from a dezincification-resistant (DZR- PRODUCT
- Herz Valves UK
STAF flanged cast iron balancing valve
Visit siteBalancing valve – PN 16 and PN 25 – DN 20-400 A flanged, cast iron (STAF) and ductile iron (STAF-SG) balancing valve that delivers accurate hydronic performance in an impressive range of applications. The STAF/STAF-SG is ideal for use mainly on the secondary side in heating and cooling systems- PRODUCT
- IMI Hydronic Engineering
E2V electronic expansion valve
Visit siteE2V is an electronic expansion valve with proportional modulation. It allows efficient control of refrigeration and air-conditioning units, and provides consistent energy saving. Its 15mm nozzle enables modulation of the refrigerant flow in a wide operating range and at various differential pressures. This can provide significant energy savings- PRODUCT
- CAREL UK
STAG ductile iron balancing valve
Visit siteBalancing valve with grooved ends – DN 65-300 A grooved end, ductile iron balancing valve that delivers accurate hydronic performance in an impressive range of applications. STAG is ideal for use mainly on the secondary side in heating and cooling systems- PRODUCT
- IMI Hydronic Engineering
Semi-lugged butterfly valves - gear
Visit siteSemi-lugged butterfly isolating valves are high-quality loose liner valves designed in accordance with EN 593. They feature extended necks for insulation and are gear operated. Suitable for water and air systems in heating, cooling, air conditioning and ventilation, as well as fire fighting and agricultural applications, the valves are in- PRODUCT
- Herz Valves UK
- COMBIFLOW 6-way Pressure Independent Control Valve provides complete pressure independent balancing and control for 4-pipe heating and cooling systems. The system combines Frese 6-way valve technology with its PICV technology to provide a compact, energy saving system suitable for a wide flow range. This solution allow engineers to reduce some of
Differential pressure overflow valve
Visit siteThe Herz differential pressure overflow valve is available in straight and angled models. It is used for hot water heating systems, between flow and return stages, to prevent high differential pressure. The valve is PN10 pressure rated Features include: Brass body. Setting by means of a handwheel; the set value can be read directly on the scale- PRODUCT
- Herz Valves UK
Double regulating valves
Visit siteDouble regulating valves are suitable for hydraulic balancing in heating and cooling systems, and the adjustment of distribution mains, circuits, heat exchangers, and heating and cooling registers. The sockets for the circuit control valves are suitable for connecting either threaded pipes or calibrated soft steel or copper pipes, the latter two- PRODUCT
- Herz Valves UK
Bronze swing check valves
Visit siteHerz bronze swing check valves are pressure rated to PN25 and are made in accordance with BS EN 12328. A range of sizes is available. The valves have a pressure/temperature rating of 25 bar at -10 to 100°C; and 10.5 bar at 186°C. End connections are to BS EN 10266 (ISO7 Rc). Test pressure - 37.5 bar (shell), 27.5 bar (seat- PRODUCT
- Herz Valves UK

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