 2026 Sun Hydraulics 1 of 2

MODEL

DOHR8DOHR8

Normally open, balanced poppet, logic element with integral T-

8A control cavity - vent-to-close

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

(H)(H)MINIMUM PILOT PRESSUREMINIMUM PILOT PRESSURE

HH 200 psi (14 bar)

(N)(N)SEAL MATERIALSEAL MATERIAL

NN Buna-N

VV Viton

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

This is a normally open, balanced poppet, switching element with an integral T-8A control

cavity. With a 2-way valve in the closed position installed in the T-8A control cavity, the

poppet remains open. Opening the 2-way valve shifts the poppet to the closed position,

provided there is sufficient pressure at port 3.

TECHNICAL DATATECHNICAL DATA

Cavity T-23A

Series 3

Capacity 240 L/min.

Maximum Operating Pressure 350 bar

Minimum Pilot Pressure Required to Shift Valve 20 bar

Control Pilot Flow See Performance Data

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

Pilot Control Cavity T-8A

Pilot Control Valve Installation Torque 27 - 33 Nm

Pilot Control Valve Hex Size 22,2 mm

Valve Hex Size 31,8 mm

Valve Installation Torque 203 - 217 Nm

Seal kit - Cartridge Buna: 990023007

Seal kit - Cartridge Polyurethane: 990023002

Seal kit - Cartridge Viton: 990023006

Model Weight 0.58 kg.

sunhydraulics.com/model/

DOHR8

Model Code Example: DOHR8ArrayModel Code Example: DOHR8ArrayCONFIGURATION OPTIONSCONFIGURATION OPTIONS

 2026 Sun Hydraulics 2 of 2

TECHNICAL FEATURESTECHNICAL FEATURES

Unique balanced construction provides predictable switching with 5000 psi (350 bar) at port 1 and port 2. Switching will only occur

when both a minimum pilot pressure of 400 psi (30 bar) is present and pilot control valve is open.

Valve will open when the pilot pressure falls below 145 psi (10 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).

NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control

valve should then be installed into the main stage valve to its required torque value.

The -8 control option allows the pilot control valve to be incorporated directly into the end of the logic cartridge via the T-8A cavity.

These pilot control cartridges are sold separately and include electro-proportional, solenoid, air pilot, and hydraulic pilot operation.

See Pilot Control Cartridges.

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 CURVESPERFORMANCE CURVES

RELATED MODELSRELATED MODELS

DOHR Normally open, balanced poppet, logic element - vent-to-close