6-15
Check Valves
Series SPR (Parker), C4V (Denison)
Catalogue HY11-3500/UK
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
6
SPR-C4V_UK.INDD RH
Characteristics
Direct operated check valves are available with both
Parker (series SPR) and Denison (series C4V) ordering
codes.
Check valves allow free flow from A to B. The counter
direction is blocked. The SPR/C4V series are equipped
with a leak-free seat type cartridge.
Function
The pressure arising in port A lifts the poppet from the
valve seat and releases the flow to B. In the counter direc-
tion, the spring and the pressure on top of the cartridge
hold the poppet onto the seat and block the flow.
C4V06
∆p/Q performance curve
General
Nominal size
NG10 NG25 NG32
Subplate mounting ISO 5781
Mounting position Unrestricted
Ambient temperature [°C] -20...+80
Weight [kg] 2.8 4.6 6.1
Hydraulic
Max. operating pressure [bar] 350
Nominal flow [l/min] 150 270 450
Fluid Hydraulic oil to DIN 51524
Viscosity recommended [cSt]/[mm²/s] 30...50
permitted [cSt]/[mm²/s] 20...380
Fluid temperature recommended [mm²/s] 30...50
permitted [mm²/s] -20...+70
Filtration ISO 4406 (1999); 18/16/13
Technical data
C4V10
6-16
SPR-C4V_UK.INDD RH
Check Valves
Series SPR (Parker), C4V (Denison)
Catalogue HY11-3500/UK
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
6
Seal
SeriesCheck
valve
Valve
size
Code Seal
omit NBR
V FPM
E
SPR
510
Parker
Code Pressure [bar]
N 0.5
R 1.0
T 2.0
U 4.0
Series
letter
Opening
pressure
Code Size
P15 NG10
P20 NG25
P32 NG32
Design
series
Denison
Ordering Code
Seal
Check
valve
direct
operated
Code Seal
1 NBR
5 FPM
C4V
0
Code Approx. cracking pressure [bar]
C4V03 C4V06/10
1 2.8 3.5
2 0.5 0.5
3 0.3 0.3
4 2.2 2.2
5 — 9.0
6 1.2 1.2
7 3.0 —
Options
Approx.
cracking
pressure
Code Nominal size
03 NG10
06 NG25
10 NG32
B
Design
series
Nominal
size
5
Max.
pressure
350 bar
3
Subplate
mounting
The Denison model code is avail-
able for existing applications.
Otherwise also refer to Parker
model code.
The Parker model code should
be used for all new applications.
Otherwise also refer to Denison
model code.
(not required
for ordering)
6-17
Check Valves
Series SPR (Parker), C4V (Denison)
Catalogue HY11-3500/UK
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
6
SPR-C4V_UK.INDD RH
Dimensions
Tolerance for all dimensions ±0.2
NG ISO-code x1 x2 x3 x4 x5 y1 y2 B1 B2 H1 H2 H3 L1 L2
10 5781-06-07-0-00 42.9 35.8 - 7.2 31.8 66.7 33.4 87.3 33.4 83 21 45 29 94.8
25 5781-08-10-0-00 60.3 49.2 - 11.1 44.5 79.4 39.7 105 39.7 109.5 29 71.5 34.7 126.8
32 5781-10-13-0-00 84.2 67.5 42.1 16.7 62.7 96.8 48.4 120 48.4 120 29 82 30.6 144.3
NG ISO-code d1max d2 t1 d3 t2 d4 d5
10 5781-06-07-0-00 15 7.1 8 M10 16 10.8 17
25 5781-08-10-0-00 23.4 7.1 8 M10 18 10.8 17
32 5781-10-13-0-00 32 7.1 8 M10 20 10.8 17
NG ISO-code NBR FPM Surface finish
10 5781-06-07-0-00 BK-M10 x 35-4pcs 68 Nm SK-SVLE5P10 SK-SVLE5P10V
25 5781-08-10-0-00 BK-M10 x 45-4pcs 68 Nm SK-SVLE5P25 SK-SVLE5P25V
32 5781-10-13-0-00 BK-M10 x 45-6pcs 68 Nm SK-SVLE5P32 SK-SVLE5P32V
6-18
SPR-C4V_UK.INDD RH
Catalogue HY11-3500/UK
Parker Hannifin GmbH & Co. KG
Hydraulic Controls Division
Kaarst, Germany
6
Notes
