MODEL
PSDB
Direct-acting, pressure reducing/relieving valve with drain to port 4
SERIES 1 / CAPACITY: 40 L/min. / CAVITY: T-21A
Direct-acting, pressure reducing/relieving valves reduce a high primary pressure at the inlet (port 2) to a constant
reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3). Draining port 4 makes the
valve insensitive to pressure at port 3. These valves incorporate a damped construction for stable operation
allowing the use of high reduced pressure.
TECHNICAL DATA
Factory Pressure Settings Established at blocked control port (dead headed)
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 30 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting 5
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-021-007
Seal kit - Cartridge Polyurethane: 990-021-002
Seal kit - Cartridge Viton: 990-021-006
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
K Handknob
O Handknob with Panel Mount
(A)ADJUSTMENT RANGE
A 500 - 3000 psi (35 - 210 bar), 700 psi
(50 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
S 25 - 200 psi (1,7 - 14 bar), 100 psi (7
bar) Standard Setting
W 750 - 4500 psi (50 - 315 bar), 1000 psi
(70 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
V Viton
snhy.com/
PSDB
TECHNICAL FEATURES
For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.
NOTES
Model Code Example: PSDBLANCONFIGURATION OPTIONS