Created on 06/16/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
DKDS
Normally closed, balanced poppet, logic element - pilot-to-open
SERIES 1 / CAPACITY: 60 L/min. / CAVITY: T-21A
This is a normally closed, balanced poppet, switching element. Pilot pressure at port 3 shifts the valve to the open
position.
TECHNICAL DATA
Minimum Pilot Pressure Required to Shift Valve 28 bar
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 0,7 cc/min.@350 bar
Pilot Volume Displacement 0,16 cc
Pilot Passage into Valve 0,8 mm
Seal kit - Cartridge Buna: 990-021-007
Seal kit - Cartridge Polyurethane: 990-021-002
Seal kit - Cartridge Viton: 990-021-006
(X)CONTROL
X Standard Pilot
(H)MINIMUM PILOT PRESSURE
H 400 psi (28 bar)
(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/
DKDS
TECHNICAL FEATURES
Unique balanced construction provides predictable switching with 5000 psi (350 bar) at both ports 1 and 2, with the external drain open and a minimum pilot
pressure of 400 psi (30 bar).
These valves are hydraulically balanced between port 1 and port 2.
Port 1 and port 2 are fully sealed from port 3 and port 4. Ports 3 and 4 are positively sealed.
Any backpressure at the drain port is directly additive to the required pilot pressure for reliable operation.
Leakage rate between port 1 and port 2 is very low, typically less than 10 drops/min. at 5000 psi (0,7 cc/min at 350 bar).
Valve will reseat when the pilot pressure falls below 145 psi (10 bar).
Cartridges with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
All ports will accept 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: DKDSXHNCONFIGURATION OPTIONS
