Hydraulics
C2
Parker Hannifin Corporation
Hydraulic Valve Division
Elyria, Ohio 44035 USA
Cartridge Valves – Pressure Relief
Catalog HY14-3201/US
DSD.p65, dd, an
C
Technical Information Series DSD
Performance Curves
Specifications
Standard Orifices
General Description
The DSD series pilot operated pressure relief valves
consist of a cartridge for manifold installation and a
pre-installed mounting valve unit (cover with pilot
stage). The cavity dimensions are according to the DIN
24342 standards. The pilot flow is limited by an orifice
mounted in the poppet. Orifices are mounted in the
cover for additional damping functions. All DSD valves
are available with the flow direction A → B only.
Nominal Size 16 25 32 40 50 63
Nominal LPM 220 500 950 1400 2300 4000
Flow Q* (GPM) (58) (132) (251) (370) (609) (1058)
Setting up to 70 Bar (1015 PSI),
Pressure up to 175 Bar (2538 PSI),
Ranges up to 250 Bar (3625 PSI),
up to 350 Bar (5075 PSI)
Pressure
Drop see flow curve
Maximum
Operating ports A, B, X = 350 Bar (5075 PSI)
Pressure** Y = 100 Bar (1450 PSI)
Poppet
Type C1
Mounting
Dimension according to DIN 24342
Mounting
Position any position
* at 8 Bar (116 PSI) ∆p
** Any pressure at Y Port is additive to the valve setting
Orifice NG 16 NG 25 NG 32 NG 40 NG 50 NG 63
No. 1 Ø1.1 Ø1.3 Ø1.4 Ø1.5 Ø1.6 Ø1.7
M5 M5 M5 M5 M6 M6
No. 2 Ø0.9 Ø1.1 Ø1.2 Ø1.3 Ø1.4 Ø1.5
1/16* 1/16* 1/16* 1/16* 1/16* 1/16*
No. 3 Ø1.3 Ø1.5 Ø1.7 Ø1.8 Ø2.0 Ø2.2
M5 M6 M6 M6 M8 M8
Orifice diameter in mm
*Thread type in NPT
A
B
B
A
)(
)(
)(
1
2
3
X
A
T
Y
B
3
2
1
A
0
0
100 15050
58 4
116 8
174
12
232
PSI
16
Bar
Q(%)
nom
Pressure Drop p∆
Minimum Pressure
(Minimum Setting)
Pressure Override
0 25 50 75 100
Nominal Volume Flow (%)
0
1450
725
100
50
2175 150
2900
200
3625 250
4350
5075
PSI
300
350
Bar
Pressure p
Hydraulics
C3
Parker Hannifin Corporation
Hydraulic Valve Division
Elyria, Ohio 44035 USA
Cartridge Valves – Pressure Relief
Catalog HY14-3201/US
DSD.p65, dd, an
C
Inch equivalents for millimeter dimensions are shown in (**)
Dimensions Series DSD
Nominal Size 16 25 32 40 50 63
H 84 (3.31) 88 (3.46) 93 (3.66) 103 (4.06) 138 (5.43) 153 (6.02)
b1 79 (3.11) ** 85 (3.35) 102 (4.02) 125 (4.92) 140 (5.51) 180 (7.09)
d1 H7 32 (1.26) 45 (1.77) 60 (2.36) 75 (2.95) 90 (3.54) 120 (4.72)
d2 H7 25 (0.98) 34 (1.34) 45 (1.77) 55 (2.17) 68 (2.68) 90 (3.54)
t2 +0.1 56 (2.20) 72 (2.83) 85 (3.35) 105 (4.13) 122 (4.80) 155 (6.10)
B total max., with regard to the respective adjustment type*
Lv 2* 146 (5.75) 141 (5.55) 149 (5.87) 161 (6.34) 168 (6.61) 188 (7.40)
Lv 5* 147 (5.79) 142 (5.59) 150 (5.91) 162 (6.38) 169 (6.65) 189 (7.44)
Lv 9* 160 (6.30) 155 (6.10) 163 (6.42) 175 (6.89) 182 (7.17) 202 (7.95)
Lv 61* 192 (7.56) 187 (7.36) 195 (7.68) 207 (8.15) 214 (8.43) 234 (9.21)
*See ordering information: adjustment type
**Width 65mm (2.56 in)
B
total
39.5
(1.56)
Lv
X
Y
B
A
t2
H
∅d2
∅d1
b1
Hydraulics
C4
Parker Hannifin Corporation
Hydraulic Valve Division
Elyria, Ohio 44035 USA
Cartridge Valves – Pressure Relief
Catalog HY14-3201/US
DSD.p65, dd, an
C
Nominal
Size
Pressure
Range
Pressure
Relief
Valve
Serial
Letter*
Design
Series
Poppet
Type
C1
Adjustment
Type
Seals Insert
Cartridge
Valve
1DSD E
*Valves already in the market may contain a different
serial letter. As far as dimensions and technical aspects
are concerned, they are identical and can be inter-
changed. Please keep this in mind when identifying the
products.
Seal Kits
Nominal Compound: Compound:
Size Nitrile Fluorocarbon
16 SK-DSDB10-E16 SK-DSDB10-E16V
25 SK-DSDB10-E25 SK-DSDB10-E25V
32 SK-DSDB10-E32 SK-DSDB10-E32V
40 SK-DSDB10-E40 SK-DSDB10-E40V
50 SK-DSDB10-E50 SK-DSDB10-E50V
63 SK-DSDB10-E63 SK-DSDB10-E63V
Code Description
Omit Nitrile
V Fluorocarbon
10
B
Code Description
B Adjustable up to 70 Bar (1015 PSI)
E Adjustable up to 175 Bar (2538 PSI)
G Adjustable up to 250 Bar (3625 PSI)
K Adjustable up to 350 Bar (5075 PSI)
Code Size
16 16
25 25
32 32
40 40
50 50
63 63
Code Description
2 Hexagon socket
screw with lock nut
5 Knob with ratchet
9 Same as Code 2,
with nut cover cap
61 Knob with E10 lock
Accessories
Weight
No
minal Size 16 25 32 40 50 63
Weight kgs 2.2 3.5 4.9 8.0 13.7 22.8
(lbs) ( 4.2) (7.7) (10.8) (17.6) (30.2) (50.3)
Bolt Kits
Nominal Bolt Part Torque
Size Dimensions Number Nm
16 (4) M8 x 40 BK414 33 Nm
(4) 5/16-18 x 1.5 BK84 24 ft-lbs
25 (4) M12 x 50 BK391 115 Nm
(4) 1/2-13 x 2.0 BK77 84 ft-lbs
32 (4) M16 x 55 BK415 281 Nm
(4) 5/8-11 x 2.25 BK85 207 ft-lbs
40 (4) M20 x 70 BK416 553 Nm
(4) 3/4-10 x 2.75 BK86 408 ft-lbs
50 (4) M20 x 75 BK417 553 Nm
(4) 3/4-10 x 3 BK87 408 ft-lbs
63 (4) M30 x 100 BK418 1910 Nm
(4) 1 1/4-7 x 4.0 BK88 1408 ft-lbs
Ordering Information Series DSD
