Eaton VICKERS SystemStak Manual page 5

Relief Valves
DGMC-3-4*
DGMC2-3-4*
General Description
These two-stage adjustable pressure
relief valves limit the maximum pressure
in the line(s) controlled by the integral
relief valve elements.
Pressure adjustment options of control
knob (with or without keylock) or
screw/locknut design are available. The
two-stage operation is basically identical
to long-established balanced piston
valves, described in detail in Vickers
Industrial hydraulics manual.
Functional Symbols
For simplicity these two-stage valves are
represented as single-stage models
DGMC-3-PT-**
P T B
DGMC2-3-AT-**-BT-**
P T B
DGMC-3-BA-**
P T B
DGMC2-3-AB-**-BA-**
P T B
Typical Section
Model Code for Relief Valves
DGMC(2) -3- ** - *
1
A
1 Type
2 = Dual relief function
Omit for single relief function
2
First function
Single relief, or first line of dual models
A
Code Pressure
limited in
PT P
AB A
BA B
AT A
BT B
3
Pressure adjustment range, first
function
A
A = 3-50 bar (43.5-725 psi)
B = 3-100 bar (43.5-1450 psi)
C = 10-200 bar (145-2900 psi)
G = 50-315 bar (725-4500 psi)
4 Pressure adjustment/ locking
method, first function
H = Handknob
A
K = Micrometer with keylock
W = Screw and locknut
5
* (-B * - * * )- * - 4*
2 3 4 5 6 7
Discharge Usage
into
T Single only
B Single, or dual with BA
A Single only
T Single, or dual with BT
T Single only
8 9