This is a special non-leak valve for single-action circuits when using a hydraulic jig with a horizontal machining center and implementing a disconnect from the hydraulic pressure source (more than 10,000 units as of 2005).
It has a compact body for easy installation within the jig (installation space: 45 mm x 85mm).
Includes a high density filter.
This valve has been used for more than 20 years.