Created on 07/01/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
DRBO
3-way, direct-acting, directional valve with drain to port 4 (1 blocked, 2 to 3
open)
SERIES 1 / CAPACITY: 28 L/min. / CAVITY: T-21A
Direct-acting, 3-way directional cartridges (1 blocked, 2 to 3 open) are switching devices typically used in moderate
flow circuits. They can be used by themselves or to actuate larger pilot-operated directional cartridges or logic
cartridges. The valve shifts when the pressure differential between port 1 and port 4 exceeds the setting.
TECHNICAL DATA
Factory Pressure Settings Established at 15 L/min.
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 30 cc/min.
Adjustment - Number of Clockwise Turns to Increase Setting 5
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-021-007
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), 1000 psi
(70 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/DRBO
TECHNICAL FEATURES
Port 3 can be used as a work port.
The flow path between port 2 and port 3 is bidirectional.
Because of their direct-acting design, these cartridges feature low internal leakage and low pilot flow consumption.
Direct-acting and pilot-operated versions of these valves are interchangeable. They fit the same cavities and have the same flow paths.
Pressure at port 4 is directly additive to the setting of the valve.
This valve is not bistable; it is capable of modulating between the two positions shown.
The flow path between port 1 and port 2 is bidirectional.
Maximum pressure at port 3 should be limited to 3000 psi (210 bar). This is due to fatigue strength limits not hydraulic operating limits.
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
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: DRBOLANCONFIGURATION OPTIONS
