By-pass, Pressure Reducing Valves & Thermostats
Condensate Pump & Fittings

PRESSURE REDUCING VALVES

WRc plc Listed to BS 6283 : part 4. Pressure reducing valves designed for use in potable water or compressed air systems. NOTE: If any item downstream of the valve cannot withstand the full inlet pressure applied to the valve, adequate pressure relief should be provided upstream of such item. Valves are made principally of bronze or DZR brass, with EPDM seats. They are of spring-loaded EPDM diaphragm type.


Temperature and pressure ratings :
Maximum inlet pressure : 25 bar (367 p.s.i.).
Maximum continuous working temperature : 80 °C
Maximum pressure reduction ratio : 10:1.
Minimum inlet pressure should be at least 1.75 bar (25 p.s.i.) higher than the selected outlet pressure.
P/N 9433/4/5 have adjustable outlet pressure in the range 2-6 bar (29.3-88 p.s.i.) and are supplied set at approximately 4 bar (60 p.s.i.). P/N 9241 has range of 0.5-2.5 bar (7-37 p.s.i.) and is supplied set at approximately 1.5 bar (22 p.s.i.). Threads are BSP parallel female inlet and outlet (to BS 2779).
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HONEYWELL Pressure Reducing Valve

HONEYWELL pressure reducing valve is designed to protect household appliances against excessive supply pressures. WRAS approved product. 1/2" BSP connections. Must be installed in horizontal pipework.

Adjustable outlet pressure range 1.5 to 6 bar. Inlet pressure range 2.5 min. to 16 bar max.
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CONDENSATE REMOVAL PUMP, SAUERMAN

The SAUERMAN SI 1820 high capacity impeller tank pump is designed to collect condensate from condensing boilers, air conditioning systems and refrigeration display cases, with or without drain pans. Supplied complete with 6 metres of 10 mm clear discharge pipe, 21.5 mm overflow pipe adaptor and 3/8" hose adaptor.

SPECIFICATION :
Maximum flow rate : 500 litres/hour
Maximum discharge head : 5.4 m
Mains supply/motor : 230 V 50/60 Hz 90 W
Thermal protection (overheat) : 130°C
Maximum temperature : 80°C
Condensate : Ph > 3.4
Sound level at 1 m : < 47 dBA
Tank capacity : 2 litres
Dimensions : length 195 x width 130 x height 170 mm
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BOILER CONDENSATE PUMP

The pump has been designed to remove room temperature condensate draining from condensing boilers. Controlled by a float/switch mechanism, which turns the pump on to discharge the condensate, volt free high level safety switch contacts.

SPECIFICATION :
Maximum flow : 270 LPH
Maximum head : 5.6 m
Tank capacity : 0.8 litres
Hose connector outlet : 3⁄8"
Inlet height : 45 mm
Cable length : 1.8 m
On level : 26 mm
Off level : 13 mm
Dimensions : 140 mm high x 220 mm long x 134 mm wide
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DIFFERENTIAL BY-PASS VALVES

WRc approved. This valve is very effective in systems where various heating loads may simultaneously be excluded from the circuit because of the closing of control or zone valves. It ensures a recirculation proportional to the number of valves that close avoiding noise and maintaining the head of the pump at a constant value. Fitted between flow and return, it helps prevent unnecessary cycling of the boiler.

Max. working pressure : 10 bar.
Max. working temperature : 110 °C.
Adjustment range : 1 m to 6 m head.
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The ABV-1 automatic bypass and differential pressure valve with differential pressure indicator is used to maintain constant differential pressure in a heating system. It reduces flow noise as thermostatic radiator valves are closed. Fitted between the flow and return pipework, also helps to prevent unnecessary cycling of the boiler.

System capacities up to : 70 kW
Maximum working pressure : 3 bar
Maximum working temperature : 110 °C
Adjustment range : 0.1 to 0.6 bar/
factory set 0.2 bar
Fittings : 22 mm compression
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Differential bypass valve is designed to prevent the pump from working against a closed circuit when all the 2 port control valves or thermostatic radiator have closed. Suitable for radiator, heating and chilled water circuits. Connections 22 mm compression.
SPECIFICATIONS :
Max. operating pressure : 10 bar
Max. operating temperature : 100°C
Adjustment : 1 - 6 m H2O, 0.1 - 0.6 bar
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WATER PRESSURE EQUALISING VALVE

Equalises hot and cold water pressure by automatically adjusting the higher water pressure to balance with the lower. Easy to install and ideal for rest homes, hotels, and sports clubs. For shower mixers, bath/shower mixers, single lever mixers, bidet mixers and other processes needing constant water temperature. The mixer must be designed to operate on equal pressure. The valve will equalize pressure on multi-point/combi or fully modulating gas boilers, gravity systems, mains pressure hot water cylinders, or any hot water system which provides constant temperature output. The water heating system must provide water at constant temperature.

DIMENSIONS :
100 mm long x 75 mm wide x 60 mm deep.
Thread : 1/2" BSP Male on all inlets and outlets.
Nuts and olives not supplied.
Working pressures :
minimum 20 kPa, 0.2 bar (3 p.s.i.)
maximum 1,000 kPa, 10 bar (150 p.s.i.)

For nuts P/N 6744 and olives P/N 6750 please click here.

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BYPASS VALVES

HONEYWELL Automatic Bypass Valve

HONEYWELL straight or angled automatic bypass valve controls the flow of water through a bypass circuit, which is installed between flow and return pipework. Complete with set pressure scale, protective cap and 22mm connections.

Δ P range = 0.1 to 0.6 bar.

Maximum pressure: 10bar. Maximum temperature: 120°C.
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HONEYWELL Commercial Automatic Bypass Valve

HONEYWELL commercial automatic bypass valve controls flow of water through a bypass circuit which is installed between flow and return pipework on a large heating system. Complete with integral pressure indicator, lockable adjustment knob and 3/4" BSP connections.

Δ P range = 0.1 to 0.5 bar.

Maximum pressure: 3bar. Maximum temperature: 110°C.
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SPIROVENT SEPARATORS

Air Separators

The Spirovent Air design allows the removal of large free flowing air and the continued micro bubbles in central heating systems. The automatic separator vent valve reduces noise, commission time, corrosion, and pump and radiator failure.
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Dirt Separators

The Spirovent Dirt separator is designed to separate and collect the dirt particles circulating in the system's water. Dirt is released through a bottom drain valve.
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Air and Dirt Separator, Horizontal

The Spirovent Air and Dirt separator allows the removal of air automatically through the automatic air vent; dirt may be flushed out through the bottom drain valve whilst the central heating system is in operation. It reduces damage to the system and therefore maintenance costs.
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Air and Dirt Separator, Vertical

The Spirovent Air and Dirt separator allows the removal of air automatically through the automatic air vent; dirt may be flushed out through the bottom drain valve whilst the central heating system is in operation. It reduces damage to the system and therefore maintenance costs.
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AERJEC WATER DE-AERATORS

ALTERNATIVE MOUNTING POSITIONS:


Designed to end air problems in central heating systems. Remove practically all the air in the system at the first pass. Stop 'sucking down' and 'pumping over'. Reduce noise, corrosion, pump and radiator failures.
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AIR SEPARATORS

TOWER separators expel air from open-vented heating systems, reduces pump failure and noise in the system. Suitable for soldered pipework connections only.
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THERMOSTATS

Thermostats to IEC 337-1, CEI 17-12 standards. Liquid expansion operation, with stainless steel electrically welded membrane sensors. Changeover microswitch with silver contacts. Calibration accuracy : ± 3%. Base cover and knob made from shock-resistant thermoplastic material. Enclosure protection IP 4O. Supplied with thermoplastic sealed gland for cable entry. Mains operated. All measurements on diagrams below are in millimetres.

Cylinder Thermostat

For strapping to cylinder or pipework of a domestic heating installation. Strap supplied. Also included is a plastic coated spring wire, with hook and eye, for fitting round the cylinder.


Operating temp: 20 °C to 90 °C
Differential: 8 °C
Body temp. range: -35 °C to 120 °C
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Stem Thermostats

Control thermostats for boilers and heating systems. Pocket has 1/2" BSP taper male connection. PN 10 (10 bar, 147 p.s.i.).


Operating temp. range : 10 °C to 90 °C
Differential : 6 °C
Max. bulb temp : 120 °C
Body temp. range : -35 °C to 120 °C
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Operating temp. range : 40 °C to 120 °C
Differential : 6 °C
Max. bulb temp: 150 °C
Body temp. range : -35 °C to 120 °C
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Capillary Thermostats

Control thermostats for boilers, air conditioning, domestic appliances, electric ovens and cooling systems. Copper bulb and capillary tube.


Operating temp. range : 10 °C to 90 °C
Differential : 6 °C
Max. bulb temp : 120 °C
Body temp. range : -35 °C to 120 °C
Capillary Length: 1 m
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Operating temp. range : 50 °C to 300 °C
Differential : 8 °C
Max. bulb temp : 330 °C
Body temp. range : -35 °C to 120 °C
Capillary Length: 1.5 m
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RF PROGRAMMABLE THERMOSTAT

The Towerstat T105 RF programmable thermostat and receiver unit can replace common residential thermostats and is designed to be used with gas, electric or oil heating control systems. The thermostat is separated into two units. The receiver serves for wiring connections and heating on/off control. The programmer thermostat serves as the user interface and temperature sensing control. The two units are linked by radio frequency. The main advantage is that the user can put the programmable thermostat nearby and can both read and control the temperature in the living area.

Programmable thermostat features :  
  LCD “need to know” screen.
Displays : time clock and day of the week, room temperature,
control profiles.
Controls : temperature adjustment, programme procedure, 6 pre-defined control profiles, 3 user programmable control profiles, protection against frost, temporary override of set temperature, user selectable temperature span and heating operation mode, battery level detection, back light.Operated by 2 x AA alkaline batteries.
Receiver : 2 LED indicators for power and output status.
Operating and output voltage : 230 V AC 50 Hz.
Switch contact rating: 16A (8A)
Dimensions :  
Control centre : 116 x 100 x 23.5 mm weight : 126g
Receiver : 91.5 x 91.5 x 42 mm weight :176g.
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TOWER Room Thermostat

TOWER STRS1 room thermostat is suitable for combination boilers and has a setting temperature range from 5°C to 30°C. Maximum ambient temperature 40°C. Raised dial for ease of use. Switch contacts SPDT, voltage free. Switch rating 6A (3A). Switching differential maximum 0.5°C. Class II insulation.

Dimensions : 85 mm high x 85 mm width x 40 mm deep.
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