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

Cavity: T-21A | Capacity:

Model

DODSXHN

Control

Minimum Pilot Pressure

Seal Material

Material/Coating

Technical features

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

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).
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.
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).
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.

Technical Data

Performance curves

CAD Files

Model CAD Files

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Symbol CAD Files

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Frequently asked questions

What parts of the Sun cartridge valve are field serviceable?
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Direct acting or pilot operated - what do I use?