this series is a normal open type.
it's usually used to block the fluid line or guide the relief valve.
when the pilot pressure (port 1) arises to the setting pressure, the fluid flow (port 2) can't go back to the tank (port 3).
when the pressure drops (port 1), the spool returns.
rated flow :
max. pressure :
working temperature :
min. -20鈩?, max. 90鈩?, with standard bunan gaskets
min. -20鈩?, max. 120鈩?, with optional viton gaskets on request
best use mineral oil with viscosity ranging between 10 and 200 cst
25 micron or better
see cavity data st11a
before screwing the cartridge on the valve body, ascertain to provide suitable gasket lubrication with clean oil and also be sure to screw the cartridge manually in to reach against the gaskets in the valve body.