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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
Changefix changing tool
Visit siteChangefix is a watertight changing tool that can be mounted onto a thermostatic valve. Changefixs liquid-lock function allows the upper part of a valve to be changed, or the seat seal at the spindle to be cleaned, while the system is under pressure- PRODUCT
- Herz Valves UK
Bronze lockshield gate valves
Visit siteHerz bronze lockshield gate valves are WRAS approved and pressure rated to PN20. Features include: Available in various dimensions. Made to BS 5154. Pressure/temperature rating of 9 bar at 180°C; and 26 bar at -10 to 100°C. BS21 taper thread (ISO 7). Test pressures - 30 bar (shell), 22 bar (seat- PRODUCT
- Herz Valves UK
ACO Triplex® plain anti-flood backflow valve
Visit siteThe ACO Triplex® is an in-line Type 2 passive anti-flooding device designed for grey water (non-faecal) connections. It conforms to the requirements of BS EN 13564. The ACO Triplex® does not have a fitted access chamber, which makes it ideal for installation with deep invert pipework that requires operative access within a brick-built access- PRODUCT
- ACO Building Drainage Ltd
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
Fully lugged lever-operated butterfly valves
Visit siteFully lugged butterfly isolating valves are high-quality loose liner valves designed in accordance with EN 593. They feature extended necks for insulation and are fully lugged and lever operated. Suitable for water and air systems in heating, cooling, air conditioning and ventilation, as well as fire fighting and agricultural applications, the- 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
Fixed orifice commissioning valve
Visit siteThe Herz fixed orifice commissioning valve is available in sizes from 0.5 to 12 (DN15 to DN 50). A low- and medium-flow version is available. The valve forms part of the companys range of circuit balancing valves. The valve has an integral orifice in its casting. It has BSP female threaded ends to BS21 and is manufactured to BS 7350. It also has- PRODUCT
- Herz Valves UK
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
Calis-TS three-way valve
Visit siteCalis-TS is a three-way valve for single pipe systems. It is suitable for water heating applications, as well as cooling systems. Calis-TS is nickel plated with a flat seal and screw cap- PRODUCT
- Herz Valves UK
ALPHA threaded dynamic balancing valve
Visit siteFrese ALPHA dynamic balancing valves are used for water control in the sanitary and HVAC industries. ALPHA dynamic balancing valves use cartridge technology and offer accuracy, reliability and affordability, as well as silent operation. The valves remove the need for traditional DRV and are designed specifically for heating and cooling systemsBrass compression gate valve
Visit siteThe brass compression gate valve is WRAS approved and pressure rated to PN16. It is available in a range of sizes: 15, 22, 28, 35, 42 and 54mm. Weights include: 0.2, 0.3, 0.5, 1, 1.3 and 2.2kg. The valve is made to BS 5154. It has a pressure/temperature rating of 5 bar at 120°C or 16 bar at 30°C. Compression ends are to BS EN 1254. Test pressure- PRODUCT
- Herz Valves UK
DZR ball valves - WRAS approved
Visit siteThe WRAS-approved, DZR compression ball valve is a full bore, PN16 pressure-rated valve with compression ends. Features include: Blow-out-proof stem. Full bore, hard chrome-plated ball. Brass or bronze body construction. Virgin PTFE seats and stem seals. Bi-directional flow for ease of installation. Threaded BS 21 taper. Compression fitting ends- 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
Nickel plated service ball valves
Visit siteHerz nickel plated service ball valves are WRAS approved and pressure rated to PN16. The valves have a brass body and compression ends to BS EN 1254-2. They are available in two sizes- PRODUCT
- Herz Valves UK
- The 900XSS venturi flanged commissioning valve forms part of the company range of commercial valves for the HVAC market: sizes: DN65-DN300; regulation, isolation and flow measurement functions; flanged connection; dynamic valve with flow verification. Uses the highly accurate venturi principle and actuators; extended versions are available
- PRODUCT
- Aalberts Integrated Piping Systems Limited
- The ACO Quatrix® with access chamber is an in-line, Type 3 automated anti-flooding device designed for domestic grey water or black (faecal wastewater) water connections. It conforms to the requirements of BS EN 13564. The ACO Quatrix® is installed into solid floor constructions with connections to 110mm or 160mm Ø drain pipe. It has a height
- PRODUCT
- ACO Building Drainage Ltd
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
DA 516 differential pressure controller
Visit siteThis compact differential pressure controller for heating and cooling systems is particularly effective in situations requiring high temperatures and/or pressure drop. DA 516 can be used both on the primary and secondary side in district heating and comfort cooling systems. Rust protection is assured thanks to the electrophoretic painted ductile- PRODUCT
- IMI Hydronic Engineering
TS-E thermostatic valve
Visit siteThe TS-E thermostatic valve is suitable for one- or two-pipe heating systems, and is available in straight, angled and reverse angled versions. Standard models feature a threaded socket, are nickel plated and have a white screw cap. Universal models feature a special socket for threaded pipe and a compression union. An O-ring is used as a spindle- PRODUCT
- Herz Valves UK
CirCon domestic hot water thermostatic valve
Visit siteThe CirCon thermostatic valve in stainless steel AISI 316 is designed for domestic hot water systems with circulation. They automatically control the temperature of water that circulates through the valves, ensuring thermal balance throughout the system. The CirCon thermostatic valve is adjustable on a stepless scale between 37°C and 65°C with an accuracy of +/- 2°C- The Frese OPTIMA Compact DN10-DN50 pressure independent balancing and control valve (PIBCV) is used in heating and cooling systems with fan coil units, chilled beams or other terminal units. Suitable for use in most applications with differential pressure range up to 800kPa. Manufactured from DZR brass (DN10-DN32) or ductile iron (DN40-DN50). Thermic and motoric actuators
Cast iron commissioning valve sets
Visit siteHerz cast iron commissioning valve sets are available in sizes from 0.5 to 12 inches. Both low- and medium-flow versions are offered. The commissioning valves form part of an extensive range of circuit balancing valves. The valves feature a hidden locking system and digital readout, as well as an orifice plate for a highly accurate and repeatable- PRODUCT
- Herz Valves UK

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