Created on 06/30/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
PVHD
Ventable, pilot operated, pressure reducing/relieving valve with drilled piston
orifice
SERIES 3 / CAPACITY: 160 L/min. / CAVITY: T-23A
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.
TECHNICAL DATA
Factory Pressure Settings Established at blocked control port (dead headed)
Maximum Operating Pressure 350 bar
Control Pilot Flow 0,25 - 0,33 L/min.
Adjustment - Number of Clockwise Turns to Increase Setting 5
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-023-007
Seal kit - Cartridge Polyurethane: 990-023-002
Seal kit - Cartridge Viton: 990-023-006
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
K Handknob
(A)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
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
W 150 - 4500 psi (10,5 - 315 bar), 200 psi
(14 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
snhy.com/PVHD
TECHNICAL FEATURES
Model Code Example: PVHDLANCONFIGURATION OPTIONS
Created on 06/30/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
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.
PERFORMANCE CURVES
