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Cartridges
Pressure Control
Reducing/Relieving
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Model

PVDBLANN

Control
  • Standard Options
  • C
    Tamper Resistant - Factory Set
  • K
    Handknob
  • L
    Standard Screw Adjustment
Adjustment Range
  • Standard Options
  • A
    100 - 3000 psi (7 - 210 bar), 200 psi (14 bar) Standard Setting
  • B
    50 - 1500 psi (3,5 - 105 bar), 200 psi (14 bar) Standard Setting
  • C
    150 - 6000 psi (10,5 - 420 bar), 200 psi (14 bar) Standard Setting
  • D
    25 - 800 psi (1,7 - 55 bar), 200 psi (14 bar) Standard Setting
  • E
    25 - 400 psi (1,7 - 28 bar), 200 psi (14 bar) Standard Setting
  • N
    60 - 800 psi (4 - 55 bar), 200 psi (14 bar) Standard Setting
  • Q
    60 - 400 psi (4 - 28 bar), 200 psi (14 bar) Standard Setting
  • W
    150 - 4500 psi (10,5 - 315 bar), 200 psi (14 bar) Standard Setting
  • Additional Options
  • H
    30 - 3000 psi (2 - 210 bar), 200 psi (14 bar) Standard Setting
  • J
    25 - 1500 psi (1,7 - 105 bar), 200 psi (14 bar) Standard Setting
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Material/Coating
  • Standard Options
  • Standard Material/Coating
  • /AP
    Stainless Steel, Passivated

Ventable, pilot-operated, pressure reducing/relieving valve

Cavity: T-21A | Capacity:

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Model

PVDBLANN

Control
  • Standard Options
  • C
    Tamper Resistant - Factory Set
  • K
    Handknob
  • L
    Standard Screw Adjustment
Adjustment Range
  • Standard Options
  • A
    100 - 3000 psi (7 - 210 bar), 200 psi (14 bar) Standard Setting
  • B
    50 - 1500 psi (3,5 - 105 bar), 200 psi (14 bar) Standard Setting
  • C
    150 - 6000 psi (10,5 - 420 bar), 200 psi (14 bar) Standard Setting
  • D
    25 - 800 psi (1,7 - 55 bar), 200 psi (14 bar) Standard Setting
  • E
    25 - 400 psi (1,7 - 28 bar), 200 psi (14 bar) Standard Setting
  • N
    60 - 800 psi (4 - 55 bar), 200 psi (14 bar) Standard Setting
  • Q
    60 - 400 psi (4 - 28 bar), 200 psi (14 bar) Standard Setting
  • W
    150 - 4500 psi (10,5 - 315 bar), 200 psi (14 bar) Standard Setting
  • Additional Options
  • H
    30 - 3000 psi (2 - 210 bar), 200 psi (14 bar) Standard Setting
  • J
    25 - 1500 psi (1,7 - 105 bar), 200 psi (14 bar) Standard Setting
Seal Material
  • Standard Options
  • N
    Buna-N
  • V
    Viton
Material/Coating
  • Standard Options
  • Standard Material/Coating
  • /AP
    Stainless Steel, Passivated
See CAD Files tab below to request images.

Technical specifications

Ventable, pilot-operated pressure reducing/relieving valves reduce a high primary pressure at the inlet to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3). The vent port (port 4) can be used as a means for remote control by pilot or 2-way valves.

  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar).
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
  • Pilot operated valves exhibit very low dead-band transition between reducing and relieving modes.
  • Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C and W are tested with 5000 psi (350 bar) of inlet pressure.
  • Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
  • By controlling the pressure at the vent (port 4), the effective setting of the valve can be controlled below the nominal valve setting.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
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  • Cavity
    T-21A
  • Series
    1
  • Capacity
    10 gpm
  • Maximum Operating Pressure
    5000 psi
  • Control Pilot Flow
    7 - 10 in³/min.
  • Factory Pressure Settings Established at
    blocked control port (dead headed)
  • Adjustment - No. of CW Turns from Min. to Max. setting
    5
  • Valve Hex Size
    7/8 in.
  • Valve Installation Torque
    30 - 35 lbf ft
  • Adjustment Screw Internal Hex Size
    5/32 in.
  • Locknut Hex Size
    9/16 in.
  • Locknut Torque
    80 - 90 lbf in.
  • Model Weight
    .30 lb
  • Seal kit - Cartridge
    Buna: 990-021-007
  • Seal kit - Cartridge
    EPDM: 990-021-014
  • Seal kit - Cartridge
    Polyurethane: 990-021-002
  • Seal kit - Cartridge
    Viton: 990-021-006

Model CAD Files

Files not yet avialable. Click below to request them.

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  • Can I back flow through a reducing valve from port 1 to port 2?
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  • Maximum pressure differentials for spring ranges: A and B are 3000 psi (210 bar) D and E are 2000 psi (140 bar) W is 5000 psi (350 bar) inlet pressure
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