cla-val series 250-01kc reverse acting... · cla-val series 250-01kc reverse acting differential...

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Cla-Val Series 250-01KC Reverse Acting Differential pressure valve Cla-Val model 250-01KC is hydraulically operated, pilot controlled, modulating valve designed to be fitted on a typical by-pass and maintain a pre-determined pressure differential allowing “unwanted” water to “spill” from the flow pipe to return pipe. The valve tends to open on an increase in differential pressure and close on a decrease in differential pressure. The main control valve is internally pressure balanced and consequently can Close-off tightly against extremely high pumps heads. Size range 1 ¼” – 28” (32mm - 700mm) Internally pressure balanced Extremely accurate control of set- point High quality materials Minimum dimensions above and below the centre-line 3 year warranty By-Pass for Boilers In this application, the differential pressure controller is sensing the pressure difference between flow and return pipes of a heating system where 2-way temperature control valves etc. are fitted. the water flow rate in the system is, therefore, variable, although the pump is constant speed. As the valve(s) close down, there is an increase in the head developed by the pump causing an increase in the pressure difference between flow and return pipes This increase is sensed by the differential pressure controller, which modulates to a more open position, allowing “unwanted surplus” water to by-pass to the return pipe and, in so doing, brings the pressure difference back to the set value. Conversely, as Valves etc. open again, the pressure difference sensed decreases and the controller closes accordingly. It is usual to set the controller to control a value about 10% above the operating point of the system at the design conditions. Boiler(s) CLA-VAL UK Limited CLA-VAL UK Limited CLA-VAL UK Limited CLA-VAL UK Limited Dainton House, Goods Station Road, Tunbridge Wells, Kent TN1 2DH Tel: (01892) 514400 Fax: (01892) 543423 Email: [email protected]

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Page 1: Cla-Val Series 250-01KC reverse acting... · Cla-Val Series 250-01KC Reverse Acting Differential pressure valve Cla-Val model 250-01KC is hydraulically operated, pilot controlled

Cla-Val Series 250-01KCReverse Acting

Differential pressure valve

Cla-Val model 250-01KC is hydraulically operated, pilot controlled, modulating valvedesigned to be fitted on a typical by-pass and maintain a pre-determined pressure differentialallowing “unwanted” water to “spill” from the flow pipe to return pipe. The valve tends to openon an increase in differential pressure and close on a decrease in differential pressure.The main control valve is internally pressure balanced and consequently can Close-offtightly against extremely high pumps heads.

Size range 1 ¼” – 28” (32mm - 700mm)

• Internally pressure balanced

• Extremely accurate control of set-point

• High quality materials

• Minimum dimensions above and

below the centre-line

• 3 year warranty

By-Pass for BoilersIn this application, the differential pressure controller issensing the pressure difference between flow and returnpipes of a heating system where 2-way temperaturecontrol valves etc. are fitted. the water flow rate in thesystem is, therefore, variable, although the pump isconstant speed. As the valve(s) close down, there is anincrease in the head developed by the pump causing anincrease in the pressure difference between flow andreturn pipes This increase is sensed by the differentialpressure controller, which modulates to a more openposition, allowing “unwanted surplus” water to by-pass tothe return pipe and, in so doing, brings the pressuredifference back to the set value. Conversely, as Valvesetc. open again, the pressure difference senseddecreases and the controller closes accordingly. It isusual to set the controller to control a value about 10%above the operating point of the system at the designconditions.

Boiler(

s)

CLA-VAL UK LimitedCLA-VAL UK LimitedCLA-VAL UK LimitedCLA-VAL UK LimitedDainton House, Goods Station Road, Tunbridge Wells, Kent TN1 2DHTel: (01892) 514400 Fax: (01892) 543423

Email: [email protected]

Page 2: Cla-Val Series 250-01KC reverse acting... · Cla-Val Series 250-01KC Reverse Acting Differential pressure valve Cla-Val model 250-01KC is hydraulically operated, pilot controlled

DIMENSIONS(Common sizes)

Valve type Size[mm]

Kv[m

3/h]

L[mm]

H[mm]

H1[mm]

Weight[Kg]

Standard Series NGE 250-01KC

50 32 230 255 82.5 15

65 43 290 295 93 20

80 58 310 300 100 25

100 119 350 390 110 40

150 209 480 480 142.5 70

200 479 600 585 170 120

250 799 730 700 200 190

300 1292 850 875 228 330

High Capacity Series 250GE-01KC

40 28 215 251 75 13

50 47 254 285 82.5 20

65 72 280 320 93 25

80 101 305 345 100 30

100 173 381 450 110 50

150 400 508 540 142.5 95

200 666 645 645 170 170

250 1076 756 780 200 310

300 1490 864 905 228 470

* The flow coefficient (Kv) expressed as m3/h is the flow ( water temp. At 20 °c) which produces a 1 bar pressure `drop across

the wide open valve.

H1

H

NOTEH = Maximum dimension

including ancillary pipe-work

L = Face to Face dimensions arebased on standard FlangedPN16 (BS4504) connections

Temperature limits: -40°c to 121°c(Dependant on materials).

CLA-VAL UK LimitedCLA-VAL UK LimitedCLA-VAL UK LimitedCLA-VAL UK LimitedDainton House, Goods Station Road, Tunbridge Wells, Kent TN1 2DHTel: (01892) 514400 Fax: (01892) 543423

Email: [email protected]