Quick Coupling Division
8145 Lewis Road • Minneapolis, MN 55427
www.parker.com/quickcouplings
E-6
Check Valves
E
Valves
Valve
Hex ** Std Crack
Size
Inlet Port
Outlet Port
Size Pressures
(inch) Part Number
Thread
Dimensions (in)
Thread (inch)
(PSI)
A
B C D
E
F
3/8 DT-370-MFMF-**
9/16-18 UNF .56 .44 .56 9/16-18 UNF .75
1, 5, 65
1/2 DT-500-MFMF-**
3/4-16 UNF .66 .50 .66
3/4-16 UNF .88
5, 65
5/8 DT-620-MFMF-**
7/8-14 UNF .76 .50 .76
7/8-14 UNF 1.06
5
3/4 DT-750-MFMF-** 1-1/16 - 12 UN .86 .50 .86 1-1/16 - 12 UN 1.25
1, 5, 65
1 DT-1000-MFMF-** 1-5/16 - 12 UN .91 .62 .91 1-5/16 - 12 UN 1.50
5, 65
1-1/4 DT-1250-MFMF-** 1-5/8 - 12 UN .96 1.06 .96 1-5/8 - 12 UN 1.88
1, 5
DT-MFMF
Male Flare 37° JIC Inlet to Male Flare 37° JIC Outlet
A
E
B
C
D
F L OW
F
Hex
DT Series
DT-MFMO
Male Flare 37° JIC Inlet to Male O-Ring Boss Outlet
DT-MOMF
Male O-Ring Boss Inlet to Male Flare 37° JIC Outlet
A
E
B
C
D
F L OW
F
Hex
A
E
B
C
D
F L OW
F
Hex
Valve
Hex ** Std Crack
Size
Inlet Port
Outlet Port
Size Pressures
(inch) Part Number
Thread
Dimensions (in)
Thread (inch)
(PSI)
A
B C D
E
F
1/4 DT-250-MFMO-**
7/16-20 UNF .55 .44 .43 7/16-20 UNF .62
5
3/8 DT-370-MFMO-**
9/16-18 UNF .56 .44 .47 9/16-18 UNF .75
1, 5, 65
1/2 DT-500-MFMO-**
3/4-16 UNF .66 .50 .55
3/4-16 UNF .88
5, 65
5/8 DT-620-MFMO-**
7/8-14 UNF .76 .50 .63
7/8-14 UNF 1.06
5
3/4 DT-750-MFMO-** 1-1/16 - 12 UN .86 .50 .73 1-1/16 - 12 UN 1.25
1, 5, 65
1 DT-1000-MFMO-** 1-5/16 - 12 UN .91 .62 .73 1-5/16 - 12 UN 1.50
5, 65
1-1/4 DT-1250-MFMO-** 1-5/8 - 12 UN .96 1.06 .73 1-5/8 - 12 UN 1.88
1, 5
Valve
Hex ** Std Crack
Size
Inlet Port
Outlet Port
Size Pressures
(inch) Part Number
Thread
Dimensions (in)
Thread (inch)
(PSI)
A
B C D
E
F
1/4 DT-250-MOMF-**
7/16-20 UNF .43 .44 .55 7/16-20 UNF .62
5
3/8 DT-370-MOMF-**
9/16-18 UNF .47 .44 .56 9/16-18 UNF .75
1, 5, 65
1/2 DT-500-MOMF-**
3/4-16 UNF .55 .50 .66
3/4-16 UNF .88
5, 65
5/8 DT-620-MOMF-**
7/8-14 UNF .63 .50 .76
7/8-14 UNF 1.06
5
3/4 DT-750-MOMF-** 1-1/16 - 12 UN .73 .50 .86 1-1/16 - 12 UN 1.25
1, 5, 65
1 DT-1000-MOMF-** 1-5/16 - 12 UN .73 .62 .91 1-5/16 - 12 UN 1.50
5, 65
1-1/4 DT-1250-MOMF-** 1-5/8 - 12 UN .73 1.06 .96 1-5/8 - 12 UN 1.88
1, 5
Specifications
The DT Series check valves have a Maximum Operating
Pressure of 5000 PSI. Standard crack pressures are 1, 5,
and 65 PSI depending on the port size and configuration.
Other crack pressures up to 200 PSI in 5 PSI increments
are available upon request.