Building services valves

The 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

High-quality loose liner butterfly valves are designed in accordance with EN 593 and feature extended necks for insulation. The valves are fully 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

Herz bronze 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

DZR 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

The Herz automatic air vent is used in heating applications and other processes where air needs to be removed from media in systems. It is PN10 pressure rated. The air vent is vertically fixed and features a stop valve for ease of maintenance and replacement. The connection between the automatic air vent and stop valve is sealed with an O-ring, so

Horne supplies thermostatic mixing valves in a range of sizes for a variety of applications including healthcare, nursing and sheltered accommodation, education, sport and leisure, housing associations and secure hospitals and prisons. Horne thermostatic mixing valves are available in a range of sizes: DN15-DN50

Balancing 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

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

The 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

Herz double check valves are used for heating applications and are WRAS approved. They have a brass body, elastomer seals, acetyl copolymer check cartridges and a stainless steel spring. Dimensions: Widths: 25, 30, 38, 46, 52 and 65mm. Lengths: 81, 92, 100, 122, 135 and 174mm. Specification: Test pressure: 16 bar. Working pressures: 0.1-10 bar

This 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

The EA-1 valve is suitable for controlling the temperature on storage calorifiers or heaters, open topped tanks or vats, air ducts, and non-storage calorifiers or heaters. This technology has been refined and developed after its original design over 100 years ago. Horne Engineering began developing and manufacturing the EA-1 thermostatic steam

DZR 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. DZR compression ball valves feature an extended stem for ease of use. Compression fitting ends are to BS 864/2. The valves are pressure rated

Calis-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

The TBV-CM terminal balancing valve for modulating 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

RL1 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

Aylesbury K Type delayed action floating valves are suitable for controlling the level of cold water stored in tanks without raised valve chambers. The valve is constructed to operate over long periods without maintenance. It is WRAS approved and supplied with a five-year warranty

The PM 512 pressure relief valve is suitable for variable flow heating and cooling systems. It is particularly effective in situations that require high pressure drops, as it ensures minimal noise. Constructed from ductile iron, the valve is electrophoretically painted with duasolid to protect against rust. It also has a soft NBR diaphragm to

High-quality loose liner butterfly valves are designed in accordance with EN 593 and feature extended necks for insulation. The valves are fully lugged and gearbox 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 accordance

Herz commissioning sets are available in sizes from 0.5 to 12 and include low- and medium-flow versions. The sets form part of the companys circuit balancing valves. The valves are made in cast iron and feature a hidden locking system and digital readout, as well as an orifice plate that offers a highly accurate and repeatable hydronic balancing

The 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

Changefix 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

Herz 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

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