Functional Symbols
PT B A
DGMPC-2-AB*-BA*-1*
PT BA
DGMPC-2-BA*-1*
PT BA
DGMPC-2-AB*-1*
B1 A1
B1 A1
B1 A1
33
SystemStak Pilot Operated Check Valves
DGMPC-2-1* series
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).
The area ratio of pilot piston to check
valve seat is 3,3:1.
Typical Sectional Views
DGMPC-2 Dual Function
DGMPC-2 Single Function
3 5 61 2
1
Model Series
Manifold or gasket mounted
Interface
2 – ISO/DIS 4401-02-02
Function
Type
PC – Pilot operated check
2
3
4
5
Check valve cracking pressure
K – 1 bar (14.5 psi)
M – 2,5 bar (36 psi)
Design
Subject to change. Installation
dimensions unchanged for design
numbers 10 thru 19.
AB – Check in line A, pilot
operated from line B
4
Model Code
7 8
BA – Check in line B, pilot
operated from line A (single
function model only)
Second function of dual models
BA – Check in line B, pilot
operated from line A
Omit for single function models
Check valve cracking pressure
K – 1 bar (14.5 psi)
M – 2,5 bar (36 psi)
(Second function of dual models)
6
7
8
34
Operating Data
Maximum flow rate 30 l/min (7.9 USgpm)
Maximum operating pressure 250 bar (3600 psi)
Hydraulic fluids
Filtration requirements
Refer to appendix
Temperature limits
Mass, approximate 0,39 kg (0.86 lb.)
Mounting attitude No restrictions.
Performance Data
Typical performance with mineral oil at
21 cSt (102 SUS) and at 50C (122F).
Pressure Drop
Pressure drop
psi bar
l/min
0
50
100
150
01234567
0 5 10 15 20 25 30
Flow rate
For other viscosities refer to appendix
7.9
4
8
12
0
USgpm
14
16
250
200
300
DGMPC-2-**K(-**K)-1*
DGMPC-2-**M(-**M)-1*
Reverse flow:
check valve
piloted open
Pilot Pressures
Area ratio, pilot piston to check valve = 3,3:1
Formula for calculating pilot pressure
required to open valve:
To open valve in line A: Pressure at B1 =
p
A
+ p
C
– p
A1
Area ratio factor
+ p
A1
To open valve in line B: Pressure at A1 =
p
B
+ p
C
– p
B1
Area ratio factor
+ p
B1
Where
p
A
= Pressure at A
p
c
= Cracking pressure
p
A1
= Pressure at A1
p
B
= Pressure at B
p
B1
= Pressure at B1
A=
B =
A1 =
B1 =
Service line location;
Refer to functional
symbols.
35
Installation Dimensions
50,0 (1.97)
50,0 (1.97)
Dual Function Models
DGMPC-2-AB*-BA*-1*
Dimensions shown in mm (inches)
62,0 (2.44)
17,5
(0.69)
36,8
(1.45)
35,0
(1.38)
30,0
(1.18)
3,0 (0.12)
3,0 (0.12 dia.)
4 holes thru
5,5 (0.21
dia.)
50,0 (1.97)
6,0 (0.23)
18,0
(0.71)
62,2 (2.45)
6,2 (0.24)
18,3
(0.72 dia.)
6,0 (0.23)
62,2 (2.45)
6,2 (0.24) 6,0 (0.23)
Single Function Models
DGMPC-2-AB*-1*
Single Function Models
DGMPC-2-BA*-1*
18,3
(0.72 dia.)
6,0
(0.23)
A
B
P
T
A
B
P
T
A
B
P
T
