33
DGMDC Direct Check Valves
General Description
These SystemStak valves are
self-operating, spring loaded, poppet
type single or dual check units.
Location of the check element can be in
the “A”, “B”, “P” or “T” port.
A check in the “P” port is available as a
“Y” single check model only.
A check in the “T” port is available as an
“X” single check model only.
The dual check unit has identical check
elements in both the “A” and “B” ports.
Check valve cracking (opening)
pressures of 1 bar (15 psi), 2,5 bar
(35 psi) and 5 bar (75 psi) are available.
3 45 8761 2
1
2
Valve function
Manifold or subplate mounted
check valve.
Interface
5 - ISO 4401-AC-05-4-A, CETOP
RP35H, Size 5 ANSI/NFPA D05
5N - NFPA D05 (Alt. A)
5P - NFPA D05 (Alt. B)
Direction of flow
X - Free flow from actuator (load)
Y - Free flow to actuator (load)
3
4
5
Check location
A -Check in cylinder port “A”
(“Y” models only)
B -Check in cylinder port “B”
(“Y” models only)
P -Check in pressure port “P”
(“Y” models only)
T -Check in tank port “T
A
”
(“X” models only)
Cracking pressure
K - 1,0 bar (15 psi)
M - 2,5 bar (35 psi)
N - 5,0 bar (75 psi)
Check location: second function
Omit for single check models.
B -Check in cylinder port “B”
(dual check models only)
Cracking pressure:
second function
Omit for single check models.
K - 1,0 bar (15 psi)
M - 2,5 bar (35 psi)
N - 5,0 bar (75 psi)
Design number - 30 series
Subject to change. Installation
dimensions unaltered for design
numbers 30 to 39 inclusive.
7
6
8
Model Code
34
Functional Symbols
A
P
P
T
B
DGMDC-5-Y-P*-30
T
A
B
AB
T
A
T
B
A
P
P
T
B
DGMDC-5-X-T*-30
T
A
B
AB
T
A
T
B
A
P
P
T
B
DGMDC-5-Y-A*-30
T
A
B
AB
T
A
T
B
A
P
P
T
B
DGMDC-5-Y-B*-30
T
A
B
AB
T
A
T
B
A
P
P
T
B
DGMDC-5-Y-A*-B*-30
T
A
B
AB
T
A
T
B
DGMDC-5P-Y-P*-30
DGMDC-5P-X-T*-30
A
P
P
T
B
DGMDC-5P-Y-A*-30
T
A
B
AB
T
A
T
B
DGMDC-5P-Y-B*-30
DGMDC-5P-Y-A*-B*-30
X
X
Y
Y
A
P
P
T
B
T
A
B
AB
T
A
T
B
X
X
Y
Y
A
P
P
T
B
T
A
B
AB
T
A
T
B
Y
Y
X
X
A
P
P
T
B
T
A
B
AB
T
A
T
B
Y
Y
X
X
A
P
P
T
B
T
A
B
AB
T
A
T
B
Y
Y
X
X
DGMDC-5N-X-T*-30
A
P
P
T
B
DGMDC-5N-Y-A*-30
T
A
B
AB
T
A
T
B
DGMDC-5N-Y-B*-30
DGMDC-5N-Y-A*-B*-30
X
X
Y
Y
A
P
P
T
B
T
A
B
AB
T
A
T
B
X
X
Y
Y
A
P
P
T
B
T
A
B
AB
T
A
T
B
Y
Y
X
X
A
P
P
T
B
T
A
B
AB
T
A
T
B
Y
Y
X
X
35
Operating Data
Basic Characteristics
Maximum flow: 120 l/min (32 USgpm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum operating pressure: 315 bar (4500 psi). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leakage @ 50 C (120 F ) and 35 bar (500 psi) 0.3 ml/min.. . . . . . . . . . . . . . . . . . .
Operating temperature: 20 to 50 C (70 to 120 F). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight: 2,9 kg (6.4 lbs.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Presure Drop
These curves show pressure drop
though each possible flow path in the
valve. The total insertion loss for the
valve must be calculated by summing
the losses through the four applicable
flow paths.
Model Type
Curve Reference for Flow Path Graph Number
yp
P T A B
p
DGMDC-5-Y-PK-30
DGMDC-5-Y-PM-30
DGMDC-5-Y-PN-30
K
M
N
T A B 1
DGMDC-5-X-TK-30
DGMDC-5-X-TM-30
DGMDC-5-X-TN-30
P
K
M
N
A B 2
DGMDC-5-Y-AK-30
DGMDC-5-Y-AM-30
DGMDC-5-Y-AN-30
P T
K
M
N
1
2
DGMDC-5-Y-BK-30
DGMDC-5-Y-BM-30
DGMDC-5-Y-BN-30
P T
1
2
K
M
N
3
DGMDC-5-Y-A*-B*-30 P T
Flow to actuator through cylinder port without check
Flow from actuator through cylinder port without check
Use K, M, or N curve from graph 3, as applicable
“N”
“M”
“K”
Pressure Drop bar
Pressure Drop psi
15
10
100
00
Flow l/min
Flow USgpm
20 40 60 80 100 120
510 15 202530
5
50
25
20
150
200
250
300
350
“T”
“A”
“B”
“N”
“M”
“K”
Graph 1
Pressure Drop bar
15
10
100
00
Flow l/min
Flow USgpm
20 40 60 80 100 120
510 15 20 2530
5
50
25
20
150
200
250
300
350
“P”
“A”
“B”
400
30
Graph 2
15
10
100
00
Flow l/min
Flow USgpm
20 40 60 80 100 120
510 15
20 25 30
5
50
25
20
150
200
250
300
350
“N”
“M”
“K”
Graph 3
“2”
“P”
“T”
“1”
Pressure Drop psi
Pressure Drop bar
Pressure Drop psi
36
Installation Dimensions
50
(1.97)
9,9 (0.39)
ISO 4401-AC-05-4-A (NFPA D05)
Mounting surface
13,5
(0.53)
128 (5.04)
37
(1.46)
11,7
(0.46)
33,2
(1.31)
71,6
(2.82)
max.
B
P
A
T
B
69,5
(2.76)
mm (inches)
30
(1.18)
4 mounting holes ∅ 6,9 (0.27) through
∅ 9,50 (0.37) counterbore 36,5 (1.44) deep
for bolt extenders (order separately)
BKE-6M-50M (M6 metric) or
BKE-4-50M (.2500-20 UNC).
Torque: 11,3-14,7 Nm (100-130 lb. in.)
DGMDC-5-Y-A*-B*-30
Dual Direct Check Valve
9,9 (0.39)
(max.)
50
(1.97)
ISO 4401-AC-05-4-A (NFPA D05)
Mounting surface
13,5
(0.53)
30
(1.18)
9,9 (0.39)
(max.)
DGMDC-5-X-T*-30
Single Direct Check Valve
50
(1.97)
ISO 4401-AC-05-4-A
(NFPA D05)
Mounting surface
13,5
(0.53)
17
(.669)
9,9 (0.39)
(max.)
DGMDC-5-Y-P*-30
Single Direct Check Valve
4 mounting holes
(See above for
specifications)
4 mounting holes
(See above for
specifications)
T
A
See page 38 for interface dimensions.