Created on 06/24/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
PBBB
Pilot operated, pressure reducing valve
CAPACITY: 20 L/min. / CAVITY: T-163A
Pilot-operated, pressure reducing valves reduce a high primary pressure at the inlet (port 2) to a constant reduced
pressure at port 1, allowing circuits with multiple pressure requirements to be operated using a single pump.
TECHNICAL DATA
Factory Pressure Settings Established at blocked control port (dead headed)
Maximum Operating Pressure 350 bar
Control Pilot Flow 0,11 - 0,16 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: 990-163-007
Seal kit - Cartridge Polyurethane: 990-163-002
Seal kit - Cartridge Viton: 990-163-006
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
K Handknob
(A)ADJUSTMENT RANGE
A 75 - 3000 psi (5 - 210 bar), 200 psi (14
bar) Standard Setting
W 75 - 4500 psi (5 - 315 bar), 200 psi (14
bar) Standard Setting
B 75 - 1500 psi (5 - 105 bar), 200 psi (14
bar) Standard Setting
N 75 - 800 psi (5 - 55 bar), 200 psi (14 bar)
Standard Setting
Q 75 - 400 psi (5 - 28 bar), 200 psi (14 bar)
Standard Setting
(N)SEAL MATERIAL
N Buna-N
E EPDM
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
/LH Mild Steel, Zinc-Nickel
snhy.com/
PBBB
TECHNICAL FEATURES
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.
Minimum setting is 75 psi (5 bar) for all spring ranges.
Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
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
Model Code Example: PBBBLANCONFIGURATION OPTIONS
Created on 06/24/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
