Duplomatic SD4M - Direct Operated Sequence Valve

Duplomatic Oleodinamica represents the real alternative in the hydraulics market. Duplomatic’s wide range of products and worldwide service network, grant its users a real competitive advantage.

The Duplomatic SD4M valve is a direct operated sequence valve of the spool type, made as a modular version with a mounting surface according to the ISO 4401 (CETOP RP 121H) standards. It is normally used to drive two or more actuators in succession. In the rest position, it is normally closed and, on one side, the spool is subjected to the push of a small piston on which the line (P1) pressure acts and, on the other side, to the adjustment spring. When the pressure in line P1 reaches the calibrated value of the spring, the valve opens and allows passage of the fluid in the controlled line (P).

The valve stays open until the pressure in the circuit drops below the set calibration value. Made in two versions, with internal or external piloting. The piloting port “X” is according to the CETOP 4.2-4-R05 mounting interface for the latter version.It can be assembled quickly without use of pipes under the ISO 4401-05 (CETOP 05) directional solenoid valves. It is normally supplied with a countersunk hex adjustment screw, locking nut and maximum adjustment travel limiting device.