Direct Operated Pressure Relief Valve
Series EVSA
4-19
Catalogue HY11-3500/UK
EVSA_UK.INDD CM_26.10.2009
Parker Hannifin GmbH
Hydraulic Controls Division
Kaarst, Germany
4
The direct operated pressure relief valve series EVSA is
a seated type valve for screw-in mounting. It is available
in two sizes and three pressure stages.
Function
When the pressure in port P exceeds the setting pressure
the cone opens to port T and thus limits the pressure in
port P to the adjusted level.
The integrated damping spool prevents pressure fluctua-
tions in the transition region. The pressure is set by the
adjusting screw, which is locked by the clamping screw.
The setting can optionally be secured by a cylinder lock
(key lock).
Features
• Seatedtypevalve
• Screw-inmounting
• 3pressurestages
• 2adjustmentmodes
- screw with lock nut
- key lock
Characteristics / Ordering Code
Technical data
Note
The spring must be unloaded when the EVSA is screwed
out of the manifold.
Nominal
size / thread
type
EVSA
A
1
Pressure
relief valve
Pressure
stages
Adjustment
screw
with hex.
socket
FPM
Seals
Design
series
(not required
for ordering)
Lock
Ordering code
Code Pressure stages
064 up to 64 bar
160 up to 160 bar
315 up to 315 bar
Code Lock
omit Normal
Z Key lock
Code Nominal size
06 NG06, M28x1.5
10 NG10, M35x1.5
General
Design Direct operated relief valve, seated type
Nominal size
NG06 NG10
Interface Screw-in mounting
Mounting position unrestricted
Ambient temperature [°C] -20...+80
MTTF
D
value [years] 150
Weight [kg] 0.3 0.45
Hydraulics
Max. operating pressure [bar] Port P 315, Port T depressurized
Pressure stages [bar] 64, 160, 315
Nominal flow [l/min] 40 (NG06), 80 (NG10)
Fluid Hydraulic oil according to DIN 51524...525
Fluid temperature [°C] Recommended +30...+50, permitted -20...+70
Viscosity permitted [cSt] /
recommended [cSt] /
[mm²/s]
[mm²/s]
20...380
30...50
Filtration ISO 4406 (1999); 18/16/13
Direct Operated Pressure Relief Valve
Series EVSA
4-20
EVSA_UK.INDD CM_26.10.2009
Catalogue HY11-3500/UK
Parker Hannifin GmbH
Hydraulic Controls Division
Kaarst, Germany
4
Characteristic Curves
∆p/Q performance curves
Pressure stage 64 bar
NG10
Pressure stage 64 bar
Pressure stage 160 bar Pressure stage 160 bar
Pressure stage 315 bar Pressure stage 315 bar
All characteristic curves measured with HLP46 at 50°C.
NG06
Direct Operated Pressure Relief Valve
Series EVSA
4-21
Catalogue HY11-3500/UK
EVSA_UK.INDD CM_26.10.2009
Parker Hannifin GmbH
Hydraulic Controls Division
Kaarst, Germany
4
Dimensions
EVSA NG10
EVSA NG06
Installation dimensions
Size M D
1
D
2
D
3
D
4
D
5
L
1
L
2
L
3
L
4
L
5
L
6
NG06 M28 x 1.5 Ø24.8 Ø15 Ø6.8 Ø25
H9
Ø6.8 15 19 30 35 45 65
NG10 M35 x 1.5 Ø31.8 Ø18.5 Ø10 Ø32
H9
Ø10 18 23 35 41 - 46 52 80
SK-EVSAA0613
SK-EVSAA1013
4-22
EVSA_UK.INDD CM_26.10.2009
Catalogue HY11-3500/UK
Parker Hannifin GmbH
Hydraulic Controls Division
Kaarst, Germany
4
Notes