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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).

Part No.  Description
Unit Price
  Qty

9241

1/2" BSP F x F

£48.28

9433

1/2" BSP F x F £48.28

9434

3/4" BSP F x F

£62.05

9435

1" BSP F x F

£83.41
       
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 (3 p.s.i.)
maximum 1,000 kPa (150 p.s.i.)

For nuts P/N 6744 and olives P/N 6750 please click here.
Part No. Description
Unit Price
 Qty
16711 Water pressure equalising valve £35.00


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.
Part No.  Description
Unit Price
 Qty

12161

22 mm compression differential by-pass valve

 £24.24

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
Part No.  Description
Unit Price
 Qty

17884

Automatic by-pass valve

 £9.98
 

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.
Part No.  Description
Unit Price
 Qty

17193

22 mm compression, horizontal

£72.00

17194

22 mm compression, vertical

 £79.20

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.
 
       
     
Part No. Description Unit Price  Qty
17196 22 mm compression, horizontal £72.00
       
       
 

 
Part No. Description Unit Price  Qty
17197 22mm compression, vertical £79.20
       
       
       
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.
 
       
       
 
Part No. Description Unit Price  Qty
17195 22 mm compression, horizontal £122.40
       
       
       
 


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.
 
       
 
Part No. Description Unit Price  Qty
18497 22 mm compression, vertical £114.00
       
       
       
       
 
 
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.
Part No. Description
Unit Price
  Qty

11334

For 22 mm pipes

£11.40

11335

For 28 mm pipes

£11.40

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
Part No. Description
Unit Price
   Qty
9777 Cylinder thermostat £6.73

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
Part No. Description
Unit Price
   Qty
9778 Stem thermostat £8.86
 
Operating temp. range : 40 °C to 120 °C
Differential : 6 °C
Max. bulb temp: 150 °C
Body temp. range : -35 °C to 120 °C
Part No. Description
Unit Price
   Qty
9779 Stem thermostat £8.86

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
Part No. Description
Unit Price
   Qty
9780 Capillary thermostat £10.26

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
Part No. Description
Unit Price
   Qty
9781 Capillary thermostat £10.26
Room Thermostats
 
Temperature range: 10 °C to 30 °C. By removing cover the range can be set to chosen limits, or the temperature fixed. With the cover back on, the thermostat is tamper resistant. To CEI EN 60730-1 standards. Enclosure protection IP 20. Stainless steel electrically welded membrane sensor. Changeover microswitch with cadmium silver contacts.

       
Part No. Description
Unit Price
   Qty
6324 Room thermostat £5.87
       
       
 
Combines time and temperature control in one unit. Can usually be fitted as a direct replacement for simple room thermostats. Each day of the week can be programmed separately, with up to 48 timed sectors each day; 2 different temperatures can be chosen for each day, plus an OFF position or there is a switch for selecting the OFF or OFF with frost protection setting of 5 °C. Holiday/override switching will set up a fixed temperature from 1 to 240 hours. Heating/cooling switch means the unit can control an air conditioning unit in the summer. Temperature and time permanently displayed. Requires two 1.5 V alkaline batteries (not supplied - please click here for these) which last up to two years. Contacts carrying capacity : 8(5) A 250 V AC.

       
Part No. Description
Unit Price
   Qty
6325 Intellitherm room thermostat £28.05
       
 
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.

       
Part No. Description
Unit Price
   Qty
17213 RF programmable thermostat £44.96
       
       
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