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PVFD

Pressure reducing/relieving valve from Sun Hydraulics

Description

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.

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  • These valves have the main stage orifice drilled into the piston rather than a staked-in orifice. This allows the valve to survive physically demanding applications.
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar).
  • 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.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-22A
Series 2
Capacity 20 gpm
Capacity (metric) 80 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Factory Pressure Settings Established at blocked control port (dead headed)
Control Pilot Flow 10 – 15 in³/min.
Control Pilot Flow (metric) 0,16 – 0,25 L/min.
Adjustment – No. of CW Turns from Min. to Max. setting 5
Valve Hex Size 1 1/8 in.
Valve Hex Size (metric) 28,6 mm
Valve Installation Torque 45 – 50 lbf ft
Valve Installation Torque (metric) 61 – 68 Nm
Adjustment Screw Internal Hex Size 5/32 in.
Adjustment Screw Internal Hex Size (metric) 4 mm
Locknut Hex Size 9/16 in.
Locknut Hex Size (metric) 15 mm
Locknut Torque 80 – 90 lbf in.
Locknut Torque (metric) 9 – 10 Nm
Model Weight 0.74 lb.
Model Weight (metric) 0.34 kg.
Seal kit – Cartridge Viton: 990022006

Configuration Options

Control

C Tamper Resistant – Factory Set
K Handknob
L Standard Screw Adjustment

Adjustment Range

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
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
W 150 – 4500 psi (10,5 – 315 bar), 200 psi (14 bar) Standard Setting
H 30 – 3000 psi (2 – 210 bar), 200 psi (14 bar) Standard Setting

Seal Material

N Buna-N
V Viton

Material/Coating

/AP Stainless Steel, Passivated
Cavity: T-22A
Nominal Capacity: 80 lpm (20 gpm)
Downloads
PDFSTP
Possible variants

PVFDCAN, PVFD-CAN, PVFDCAN/AP, PVFD-CAN/AP, PVFDCAV, PVFD-CAV, PVFDCAV/AP, PVFD-CAV/AP, PVFDCBN, PVFD-CBN, PVFDCBN/AP, PVFD-CBN/AP, PVFDCBV, PVFD-CBV, PVFDCBV/AP, PVFD-CBV/AP, PVFDCDN, PVFD-CDN, PVFDCDN/AP, PVFD-CDN/AP, PVFDCDV, PVFD-CDV, PVFDCDV/AP, PVFD-CDV/AP, PVFDCEN, PVFD-CEN, PVFDCEN/AP, PVFD-CEN/AP, PVFDCEV, PVFD-CEV, PVFDCEV/AP, PVFD-CEV/AP, PVFDCHN, PVFD-CHN, PVFDCHN/AP, PVFD-CHN/AP, PVFDCHV, PVFD-CHV, PVFDCHV/AP, PVFD-CHV/AP, PVFDCWN, PVFD-CWN, PVFDCWN/AP, PVFD-CWN/AP, PVFDCWV, PVFD-CWV, PVFDCWV/AP, PVFD-CWV/AP, PVFDKAN, PVFD-KAN, PVFDKAV, PVFD-KAV, PVFDKBN, PVFD-KBN, PVFDKBV, PVFD-KBV, PVFDKDN, PVFD-KDN, PVFDKDV, PVFD-KDV, PVFDKEN, PVFD-KEN, PVFDKEV, PVFD-KEV, PVFDKHN, PVFD-KHN, PVFDKHV, PVFD-KHV, PVFDKWN, PVFD-KWN, PVFDKWV, PVFD-KWV, PVFDLAN, PVFD-LAN, PVFDLAN/AP, PVFD-LAN/AP, PVFDLAV, PVFD-LAV, PVFDLAV/AP, PVFD-LAV/AP, PVFDLBN, PVFD-LBN, PVFDLBN/AP, PVFD-LBN/AP, PVFDLBV, PVFD-LBV, PVFDLBV/AP, PVFD-LBV/AP, PVFDLDN, PVFD-LDN, PVFDLDN/AP, PVFD-LDN/AP, PVFDLDV, PVFD-LDV, PVFDLDV/AP, PVFD-LDV/AP, PVFDLEN, PVFD-LEN, PVFDLEN/AP, PVFD-LEN/AP, PVFDLEV, PVFD-LEV, PVFDLEV/AP, PVFD-LEV/AP, PVFDLHN, PVFD-LHN, PVFDLHN/AP, PVFD-LHN/AP, PVFDLHV, PVFD-LHV, PVFDLHV/AP, PVFD-LHV/AP, PVFDLWN, PVFD-LWN, PVFDLWN/AP, PVFD-LWN/AP, PVFDLWV, PVFD-LWV, PVFDLWV/AP, PVFD-LWV/AP

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