E-4
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
E Valves
Check Valves
DT Series
ParkerDTSeriesCheckValvesOffertheFeaturesof
a Compact Body Size, and up to 5000 psi Maximum
Operating Pressure.
The DT Series check valves utilize the de pend able, internal
design features found in Parker check valves, but with the
added benefit and convenience of com pact design. Sizes are
availablefrom1/4”to1-1/4”withsixdifferentFittingStyles.
The DT Series expands Parker’s high quality product line of
versatile and efficient check valves.
Features
•CompactDesign.Easytoplumbintotightcircuits.
•All steel construction. No internal gaskets or seals to wear out.
•One-piecebodyeliminatesthreadsandsealsthatmaybe
potential leakage points.
•Smoothflowstream.Poppetspringisisolatedfromflow
stream.
•Varietyofendfittings.
•Optionalcrackpressuresavailablefrom1to200PSI.
•Chromium-6Freeplatedexteriorfinish.
•NitrileO-RingincludedonMOandMSfittings.
•CaptiveO-RingGrooveisstandardonMSendfittings.
FLOW
FLOW
FLOW
FLOW
FLOW
DT-MFMF
MaleFlare37°JICInlettoMaleFlare37°JICOutlet
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
FLOW
DT-MOMS
Male O-Ring Boss Inlet to Male Seal-Lok
®
Outlet
DT-MSMO
Male Seal-Lok
®
Inlet to Male O-Ring Boss Outlet
DT-MSMS
Male Seal-Lok
®
Inlet to Male Seal-Lok
®
Outlet
Specifications
The DT Series check valves have a Maximum Operating
Pressure of 2500-5000 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.
E-5
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
E Valves
DT-MFMF Male Flare 37° JIC Inlet to Male Flare 37° JIC Outlet
Valve
Size
Part Number
Inlet Port Thread Dimensions (in.) Outlet Port Thread Wrench Flats
** Std Crack
Pressure (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
AE
BC
D
FLOW
F
Hex
Check Valves
DT Series
DT-MFMO Male Flare 37° JIC Inlet to Male O-Ring Boss Outlet
Valve
Size
Part Number
Inlet Port Thread Dimensions (in.) Outlet Port Thread Wrench Flats
** Std Crack
Pressure (psi)
A B C D E F
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
AE
BC
D
FLOW
F
Hex
E-6
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
E Valves
DT-MOMS Male O-Ring Boss Inlet to Male Seal-Lok
®
Outlet
Valve
Size
Part Number
Inlet Port Thread Dimensions (in.) Outlet Port Thread Wrench Flats
** Std Crack
Pressure (psi)
A B C D E F
1/4 DT-250-MOMS-** 7/16-20UNF .43 .45 .39 9/16-18UNF .62 5
3/8 DT-370-MOMS-** 9/16-18UNF .47 .44 .44 11/16-16 UN .75 1, 5, 65
1/2 DT-500-MOMS-** 3/4-16UNF .55 .50 .51 13/16-16 UN .88 5, 65
5/8 DT-620-MOMS-** 7/8-14UNF .63 .50 .62 1-14 UNS 1.06 5
3/4 DT-750-MOMS-** 1-1/16 - 12 UN .73 .50 .68 1-3/16 - 12 UN 1.25 1, 5, 65
1 DT-1000-MOMS-** 1-5/16 - 12 UN .73 .62 .70 1-7/16 - 12 UN 1.50 5, 65
1-1/4 DT-1250-MOMS-** 1-5/8 - 12 UN .73 1.06 .70 1-11/16 - 12 UN 1.88 1, 5
DT-MOMF Male O-Ring Boss Inlet to Male Flare 37° JIC Outlet
Valve
Size
Part Number
Inlet Port Thread Dimensions (in.) Outlet Port Thread Wrench Flats
** Std Crack
Pressure (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
AE
BCD
FLOW
F
Hex
A
E
BC
D
FLOW
F
Hex
Check Valves
DT Series
E-7
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
E Valves
DT-MSMS Male Seal-Lok
®
Inlet to Male Seal-Lok
®
Outlet
Valve
Size
Part Number Inlet Port Thread Dimensions (in.) Outlet Port Thread Wrench Flats
** Std Crack
Pressure (psi)
A B C D E F
3/8 DT-370-MSMS-** 11/16-16 UN .44 .44 .44 11/16-16 UN .75 1, 5, 65
1/2 DT-500-MSMS-** 13/16-16 UN .51 .50 .51 13/16-16 UN .88 5, 65
5/8 DT-620-MSMS-** 1-14 UNS .62 .50 .62 1-14 UNS 1.06 5
3/4 DT-750-MSMS-** 1-3/16 -12 UN .68 .50 .68 1-3/16 - 12 UN 1.25 1, 5, 65
1 DT-1000-MSMS-** 1-7/16 - 12 UN .70 .62 .70 1-7/16 - 12 UN 1.50 5, 65
1-1/4 DT-1250-MSMS-** 1-11/16 - 12 UN .70 1.06 .70 1-11/16 - 12 UN 1.88 1, 5
DT-MSMO Male Seal-Lok
®
Inlet to Male O-Ring Boss Outlet
Valve
Size
Part Number Inlet Port Thread Dimensions (in.) Outlet Port Thread Wrench Flats
** Std Crack
Pressure (psi)
A B C D E F
3/8 DT-370-MSMO-** 11/16-16 UN .44 .44 .47 9/16-18UNF .75 1, 5, 65
1/2 DT-500-MSMO-** 13/16-16 UN .51 .50 .55 3/4-16UNF .88 5, 65
5/8 DT-620-MSMO-** 1-14 UNS .62 .49 .63 7/8-14UNF 1.06 5
3/4 DT-750-MSMO-** 1-3/16 - 12 UN .68 .50 .73 1-1/16 - 12 UN 1.25 1, 5, 65
1 DT-1000-MSMO-** 1-7/16 - 12 UN .70 .62 .73 1-5/16 - 12 UN 1.50 5, 65
1-1/4 DT-1250-MSMO-** 1-11/16 - 12 UN .70 1.06 .73 1-5/8 - 12 UN 1.88 1, 5
A
F
Hex
E
BC D
FLOW
A
B
E
C
D
FLOW
F
Hex
Check Valves
DT Series
E-8
Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings
E Valves
Check Valves
DT Series
Flow Data
0
10
20
30
40
50
60
70
80
90
100
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
1/2" & 5/8"
(DT-500 / DT-620)
3/4"
(DT-750)
DT Series (1/2", 5/8" & 3/4")
Test Fluid: Oil - 200 SUS
Flow in USGPM
Pressure Drop in PSID
Ordering Information
CRACK PRESSURE
01 - 1 PSI
05 - 5 PSI
65 - 65 PSI
Other Crack Pressures up to 200 PSI in 5 PSI
increments are available. Contact the Division
for price and delivery on non-standard
crack pressures
DT- ✱✱✱- ✱✱✱✱- ✱✱
SERIES SIZE
250 - 1/4”
370 - 3/8"
500 - 1/2"
620 - 5/8”
750 - 3/4"
1000 - 1"
1250 - 1-1/4"
FITTING STYLE
MFMF -
MFMO -
MOMF -
MOMS -
MSMO -
MSMS -
Male Flare Inlet to Male Flare Outlet
Male Flare Inlet to Male O-Ring Boss Outlet
Male O-Ring Boss Inlet to Male Flare Outlet
Male O-Ring Boss Inlet to Male Face Seal Outlet
Male Face Seal Inlet to Male O-Ring Boss Outlet
Male Face Seal Inlet to Male Face Seal Outlet
0
10
20
30
40
50
60
70
80
90
100
110
0 1 2 3 4 5 6 7 8 9 10
Pressure Drop in PSID
DT Series (1/4" & 3/8")
Test Fluid: Oil - 200 SUS
Flow in USGPM
3/8"
(DT-370)
1/4"
(DT-250)
0
20
40
60
80
100
120
140
160
180
200
0 10 20 30 40 50 60 70 80 90
1"
(DT-1000)
1-1/4"
(DT-1250)
DT Series (1" & 1-1/4")
Test Fluid: Oil - 200 SUS
Flow in USGPM
Pressure Drop in PSID
Specifications
Series
Body
Size (in.)
Material
Rated
Pressure (psi)
Crack
Pressure
Range (psi)
DT Series 1/4 - 1 1/4 Steel 2500-5000 5-200
DT Series Pressure Table (psi)
Body
Size
Max Rated
Pressure
MF
(Male JIC 37)
MO (SAE
O-Ring Boss)
MS (Male
Seal-Lok)
1/4 5000 5000 5000 5000
3/8 5000 5000 5000 5000
1/2 5000 4500 5000 5000
5/8 5000 3500 5000 5000
3/4 5000 3500 5000 5000
1 5000 3000 5000 5000
1 1/4 4000 2500 4000 4000
DT Series Installation Assembly Torque (ft-lbs)
Body
Size
MF
(Male JIC 37)
MO (SAE
O-Ring Boss)
MS (Male
Seal-Lok)
1/4
Refer to Parker
TFDCatalog4300
for torque
recommendation
13.3 +10% / -0%
Refer to Parker
TFDCatalog4300
for torque
recommendation
3/8 22.1 +10% / -0%
1/2 62.6 +10% / -0%
5/8 84.8 +10% / -0%
3/4 125.3 +10% / -0%
1 199 +10% / -0%
1 1/4 210 +10% / -0%