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Types of Differential Pressure Control Valve
Pilot Operated DPCV Direct Acting DPCV
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Typical Direct Acting Differential Pressure Control Valve
Flanged Angle Pattern Threaded Oblique Pattern
1) Adjustment Nut
2) Spring Cover
3) Test Plugs
4) Housing
5) Piston
6) Capillary Tube Connection
7) Adjustment Spring
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DPCV Pressure Diagram 4
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DPCV Application Static Balancing Solution
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DPCV Application Dynamic Balancing Solution
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DPCV Typical Partner Valve Arrangements
Double Regulating Valve
(FODRV) Flow Limiting Valve (CFR)
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DPCV Commissioning
12
kPa
14
kPa
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DPCV P-Band
12
kPa
14
kPa
11 kPa
0.014 l/s 0.111 l/s 0.167 l/s
3 k
Pa
P-
Ba
nd
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DPCV Hysteresis
0
10
20
30
40
50
60
70
80
90
100
0 100 200 300 400 500 600 700
Pressure [kPa]
Flow [lph]
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DPCV Pump Sizing Calculation
Pump pressure (ΔPP) = Differential pressure in system (ΔPS) + Pressure loss across
valve (ΔPV )
• Desired differential pressure in system = 30 kPa
• Desired flow in system = 10 m3/h
• Selected DPCV Kvs = 29 m3/h (DN50)
→ Required pump pressure (ΔPP) = 30 + ((10/29)2 * 100) = 30 kPa + 11.9 kPa = 41.9 kPa
