Created on 03/02/2016

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MODEL

DOHS

Normally open, balanced poppet, logic element - pilot-to-close

SERIES 3 / CAPACITY: 240 L/min. / CAVITY: T-23A

This is a normally open, balanced poppet, switching element. Pilot pressure at port 3 shifts the valve to the closed

position.

TECHNICAL DATA

Minimum Pilot Pressure Required to Shift Valve 20 bar

Maximum Operating Pressure 350 bar

Maximum Valve Leakage at 110 SUS (24 cSt) 0,7 cc/min.@350 bar

Pilot Volume Displacement 0,82 cc

Seal kit - Cartridge Buna: 990-023-007

Seal kit - Cartridge EPDM: 990-023-014

Seal kit - Cartridge Polyurethane: 990-023-002

Seal kit - Cartridge Viton: 990-023-006

(X)CONTROL

X Standard Pilot

(H)MINIMUM PILOT PRESSURE

H 300 psi (20 bar)

(N)SEAL MATERIAL

N Buna-N

E EPDM

V Viton

MATERIAL/COATING

Standard Material/Coating

/AP Stainless Steel, Passivated

snhy.com/DOHS

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 300 psi (20 bar).

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 configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage

the seals.

These valves are hydraulically balanced between port 1 and port 2.

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

Model Code Example: DOHSXHNCONFIGURATION OPTIONS