Needle Valve, Spool Type, Metric Cartridge – SDH05330

Needle Valve, Spool Type, Metric Cartridge, SDH05330

The SDH05330 is a hydraulically operated, spring-loaded, adjustable spool valve.

In the normal position, the valve is open and there is flow from port 3 to port 2. When control pressure is applied to port 1, the valve switches into the flow control position and the flow is reduced.
The flow setting can be adjusted using the set screw (clockwise to increase flow, counter-clockwise to decrease flow).

Caution: the control pressure must generally be greater than the pressure at port 2, otherwise the valve will not function. In order that the valve switches back from the flow control position to the fully pen position, port 1 must be vented and (at this moment) there must be no flow through the valve.

See data-sheet for drawings, dimensions, model code, etc…


  • Flow control is dependent on the viscosity of the oil and the system pressure
  • A lock-nut locks the setting
  • External surfaces zinc-plated
  • Hardened and ground control piston to ensure minimal wear and extended service life
  • Compact design
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