DZ5DP0 pages

PRESSURE SEQUENCE VALVE
TYPE DZ5DP
NG 5

21 M Pa

15 dm3/min.

WK
450 447
04.1999r.

Pressure sequence valves are used for connecting a second hydraulic system when pressure in a main system
reaches the set value.
The valve can be mounted in systems in any positions.

DESCRIPTION OF OPERATION

The sequence valve comprises the housing 1, control spool
2, pressure spring 3, pressure setting element 4 and optional check valve 5.
Sequence pressure is adjusted by means of the pressure
setting element 4.
The spring 3 holds the control spool 2 in neutral position
and the valve is closed. Pressure in line P affects the spool
surface opposite the spring 3 via the control line 6 and jet 6.
When the pressure in line P reaches the value set, the con-

trol spool moves and opens the connection A to B.
The hydraulic system connected at port A is actuated, without any decrease in pressure at port P.
Supply of control fluid may also be external, via port X.
Depending on the valve application, the pilot fluid drain is
either external via port T (Y) or internal.
A check valve 5 may be mounted for free flow through the
valve from B to A.

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WK 450 447