Control Valves

How does a pressure control valve work exactly? If we start closing the control valve, does pressure increase?

or decrease? and to be clear, since we are closing the control valve and therefore restricting flow, wouldnt the liquid pressure up before the control valve?

A pressure control valve is a pressure regulator. Its basic requirement is the input pressure must be higher than the output.
It automatically adjusts flow to maintain a steady output pressure.
It is not something you shut or open, but just adjust output pressure (if meant to be variable).
Most are set for a particular out pressure, and sealed off at that.

Discover Control Valves On eBay Below:

FESTO DQ386 EO 4696 110 008 Rev C PNEUMATIC SOLENOID CONTROL VALVE ASSEMBLY
FESTO DQ386 EO 4696 110 008 Rev C PNEUMATIC SOLENOID CONTROL VALVE ASSEMBLY
$199.97
GUARANTEED ITT GENERAL CONTROLS AH13A132A HYDRAMOTOR ACTUATOR GAS VALVE 120V
GUARANTEED ITT GENERAL CONTROLS AH13A132A HYDRAMOTOR ACTUATOR GAS VALVE 120V
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D1968B4007 Ross Flow Control Valve 03 10 Bar
D1968B4007 Ross Flow Control Valve 03 10 Bar
$49.97
NUMATICS 2FC1 FLOW CONTROL VALVE 1 4IN NPT FEMALE IN LINE NEW 196034
NUMATICS 2FC1 FLOW CONTROL VALVE 1 4IN NPT FEMALE IN LINE NEW 196034
$14.30
D1968B5007 Ross Flow Control Valve 03 10 Bar
D1968B5007 Ross Flow Control Valve 03 10 Bar
$49.97
Fisher Controls 912 101 LP Gas Pressure Regulator Valve Type 912 New No Box
Fisher Controls 912 101 LP Gas Pressure Regulator Valve Type 912 New No Box
$80.77
Bosch 9810231367 Directional Control Valve NIB
Bosch 9810231367 Directional Control Valve NIB
$161.99
Asco Controls Hydramotor Safety Shut Off Valve 35
Asco Controls Hydramotor Safety Shut Off Valve 35
$995.00
PARKER SP50 FLOW CONTROL VALVE NEW 159984
PARKER SP50 FLOW CONTROL VALVE NEW 159984
$10.72
849VPRR1000AJHF4 849 VPRR 1000 Eurotherm Valve Positioner Controller
849VPRR1000AJHF4 849 VPRR 1000 Eurotherm Valve Positioner Controller
$511.54
Schrader Bellows 3250 0319 Flow Control Valve 1 2 NPT USED
Schrader Bellows 3250 0319 Flow Control Valve 1 2 NPT USED
$9.99
DYNEX RIVETT VDS855 D05H 10 DIRECTIONAL CONTROL VALVE 5000PSI H264
DYNEX RIVETT VDS855 D05H 10 DIRECTIONAL CONTROL VALVE 5000PSI H264
$67.91
CNC LATHE DAIKIN SFD G03 2 20 SFDGO3 DEECELERATION AND FLOW CONTROL VALVE NEW
CNC LATHE DAIKIN SFD G03 2 20 SFDGO3 DEECELERATION AND FLOW CONTROL VALVE NEW
$162.00
KNIGHT GLOBAL TBA1104 Table Foot Control Valve G4512971
KNIGHT GLOBAL TBA1104 Table Foot Control Valve G4512971
$564.52
PARKER DIRECTIONAL CONTROL VALVE D3A1BN 20 5000 PSI MAX HYDRAULIC
PARKER DIRECTIONAL CONTROL VALVE D3A1BN 20 5000 PSI MAX HYDRAULIC
$200.00
Airlessco 115 101 Pump Head Assembly Pressure Control Valve FREE SHIPPING
Airlessco 115 101 Pump Head Assembly Pressure Control Valve FREE SHIPPING
$89.99
MAC R2 02 34 Adjustable Pneumatic Air Flow Control Valve FREE SHIPPING
MAC R2 02 34 Adjustable Pneumatic Air Flow Control Valve FREE SHIPPING
$14.99
TOYOOKI HDD3C 3W BGA 1 06B LYD2 NEW SOLENOID CONTROL VALVE HDD3C3WBGA106BLYD2
TOYOOKI HDD3C 3W BGA 1 06B LYD2 NEW SOLENOID CONTROL VALVE HDD3C3WBGA106BLYD2
$400.00
HANSEN PCMTF SEALED MOTOR VALVE CONTROLLER ENCLOSURE ENCLOSURE ONLY
HANSEN PCMTF SEALED MOTOR VALVE CONTROLLER ENCLOSURE ENCLOSURE ONLY
$69.95
Dynaquip Controls Vhh28at Repair Part Repl 2 Brass Ball Valve G0650505
Dynaquip Controls Vhh28at Repair Part Repl 2 Brass Ball Valve G0650505
$187.78
Fisher Controls RGASKETX032 Actuator Valve Repair Kit Type E ER EZ EW
Fisher Controls RGASKETX032 Actuator Valve Repair Kit Type E ER EZ EW
$17.49
Fisher Controls RV100X00C22 Actuator Valve Repair Kit V100
Fisher Controls RV100X00C22 Actuator Valve Repair Kit V100
$19.99
Dynaquip Controls Vhh25at Repair Part Repl 1 Brass Ball Valve G0650399
Dynaquip Controls Vhh25at Repair Part Repl 1 Brass Ball Valve G0650399
$65.40
Dynaquip Controls 18906801 Repair Part Repl 2 Brass Ball Valve G0650496
Dynaquip Controls 18906801 Repair Part Repl 2 Brass Ball Valve G0650496
$187.59
Festo 534341 One Way Flow Control Valve GRLA 3 8 QS 6 RS D
Festo 534341 One Way Flow Control Valve GRLA 3 8 QS 6 RS D
$33.77
Dynaquip Controls 19100801 Repair Part Repl 2 Ss Ball Valve G0650548
Dynaquip Controls 19100801 Repair Part Repl 2 Ss Ball Valve G0650548
$370.42
DELTROL HYDRAULIC FLOW CONTROL VALVE EF35B 10120 55 20 GPM VITON SEALS
DELTROL HYDRAULIC FLOW CONTROL VALVE EF35B 10120 55 20 GPM VITON SEALS
$40.00
JOHNSON CONTROLS JC5311 PIN VALVE GAUGE 0 125psi 2 5 8 DIA FACE 02 306 615
JOHNSON CONTROLS JC5311 PIN VALVE GAUGE 0 125psi 2 5 8 DIA FACE 02 306 615
$44.97
BULLARD F35 Constant Flow Control Valve For Use With G0646591
BULLARD F35 Constant Flow Control Valve For Use With G0646591
$39.88
Versa Valves BC 4 Bleed Control Valve Lot of 6
Versa Valves BC 4 Bleed Control Valve Lot of 6
$39.99
NEW Rexroth Bosch 01 0821 200 201 588 Flow Control Valve FREE SHIPPING
NEW Rexroth Bosch 01 0821 200 201 588 Flow Control Valve FREE SHIPPING
$9.99
NEW Rexroth Bosch 01 0821 200 201 591 Flow Control Valve FREE SHIPPING
NEW Rexroth Bosch 01 0821 200 201 591 Flow Control Valve FREE SHIPPING
$9.99
NEW Rexroth Bosch 01 0821 200 201 685 Flow Control valve FREE SHIPPING
NEW Rexroth Bosch 01 0821 200 201 685 Flow Control valve FREE SHIPPING
$9.99
NEW Rexroth Bosch 01 0821 200 204 685 Flow Control Valve FREE SHIPPING
NEW Rexroth Bosch 01 0821 200 204 685 Flow Control Valve FREE SHIPPING
$9.99
Versa Valves BC 6 Bleed Control Valve Lot of 3
Versa Valves BC 6 Bleed Control Valve Lot of 3
$39.99
Raymond Control Systems Pas 401 60 Valve Actuator
Raymond Control Systems Pas 401 60 Valve Actuator
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Festo one way flow control valve grla 1 8 pk 4 b NEW 151167
Festo one way flow control valve grla 1 8 pk 4 b NEW 151167
$16.69
New American Standard Pilotair VIVR431004672 2CA 1B P58722 3 Air Control Valve
New American Standard Pilotair VIVR431004672 2CA 1B P58722 3 Air Control Valve
$139.99
New Deltrol Pneu trol F30SS F 30 SS Flow Control Valve Stainless Steel
New Deltrol Pneu trol F30SS F 30 SS Flow Control Valve Stainless Steel
$99.99

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