Eaton VICKERS SystemStak Manual page 16

Pilot Operated Check Valves
DGMPC-3-4*
General Description
These valves provide pilot operated
check functions in one or both service
lines (A or B), the operating pilot supply
coming from the opposite service line.
Thus with pressure in one service line
the check valve in the other service line
will be open (subject to system/actuator
pressures being correct for the valve
area ratios).
A 3:1 area ratio of pilot piston to check
valve seat is supplemented by an
optional 10:1 decompression feature.
Functional Symbols
DGMPC-3-(D)AB*-(D)BA*
B1
P T B
DGMPC-3-(D)AB*
B1
P T B
DGMPC-3-(D)BA*
B1
P T B
Typical Section
Model Code for Pilot Operated Check Valves
DGMPC-3-(D)
A1
Decompression feature
1
D = 10:1 decompression ratio
A
Omit if not required
2 Function
AB = Check in line A, pilot operated
A1
from line B
BA = Check in line B, pilotoperated
from line A (single check model
only)
A
3 Check valve opening/cracking
pressure
K = 1 bar (14.5 psi)
M = 2,5 bar (36 psi)
A1
N = 5 bar (72 psi)
4
Decompression feature (second
function of dual models)
As in
1
A
Omit for single line models,and if not
required for dual models
Note: "D" must be specified here, for dual models, if
called for in
1
5 Second function of dual models
BA = Check in line B, pilot operated
from line A
Omit for single line models
16
** * [- (D) ** *] 4* -
1 2 3 4 7
5 6
6
Options as in
Omit for single line models
7
Subject to change. Installation
dimensions unchanged for design
numbers 40 to 49 inclusive.
Check valve opening/cracking
pressure (second function of dual
models)
3
Design number, 40 series