Pressure control valves
Performance graph
Oil viscosity: 46 cSt (217 SSU) Fluid temperature: 40 °C
3.02.002.1
spring 3
spring 2
spring 1
2
1
1
2
TCGE-0524-IR00
Drawing Hydraulic symbol
www.eltfluid.com
For general conditions and terms of use see page S.005.
This document is Elt Fluid property and therefore data or technical specification can
not be reproduced.
Eltfluid also reserves the right to modify all the above data, at any time.
P081M-20
Relief valve, direct acting
poppet type
Description
Pressure relief valve designed for application where pressure
adjustment and low leakage is requested. The valve can be used
also as a safety device to limit the pressure of circuit.
Operation mode
The valve consist in a body, poppet and spring. Pressure is manually
set by the adjustment screw. The spring pushes the poppet into the
closed position. When the pressure exceeds the spring force, valve
opens allowing flow from port 1 to port 2.
GENERAL DATA
Weight: 0,095 kg (0, 022 lbs).
Ambient temperature range: -30 °C a 60 °C with seals standard (NBR).
Max proof pressure: 420 bar (6.090 psi).
Flow Max: 30 l/min (8 gpm).
Cartridge materials: high strength steel, internal parts hardened and
grinding.
TECHNICAL DATA
HYDRAULIC
Max. working pressure: 350 bar (5.000 psi)
Flow rate: See performance graph
Fluid:
Viscosity:
Mineral based oil
From 15cSt to 250 cSt
Leakage*: 0,75 cc/min (15 drops/min)
Standard seals: O-ring NBR Polyurethane
Cavity: SCN0821
Installation torque: 45 Nm
Installation torque
nut Hex. 19:
20 Nm
Max contamination level: NAS 8 ISO 4406 19/17/14
Fluid temperature range: From -20 °C to +80 °C
Seals kit std.: 5AG0023
*Note: The leakage are to be considered at a pressure equal to 80% of the setting request.
Spring setting
Inches
Millimeters
Dimensions
*Note: Settings are performed at a flow rate
of 4 l/min.
Seals
Valve Setting*
None (Valve not set)
S…: setting in bar
in multiples of 5
STANDARD HOUSING
Ordering code: See page 9.02.001
Material*: Aluminium/Steel
Max working pressure for aluminum body: 210 bar
Max working pressure for steel body: 350 bar
*Note: To correctly select the material, in relation to application, see page S.001.
--
For other options
contact Sales dept.
None (std. NBR+Polyurethane)
3.02.002.2
Range
bar-(psi)
Pressure increase
bar/turn (psi/turn)
0
15-60 bar
(218-870psi)
7.7 bar
(112 psi)
1
25-135 bar
(363- 1958 psi)
18 bar
(261 psi)
2
50-220 bar
(725- 3191 psi)
32 bar
(464 psi)
3
120-350 bar
(1740-5076 psi)
64 bar
(928 psi)
P081M-20
Hex.
0,94
24
Hex.
0,75
19
Hex.
0,2
5
3/4-16 UNF-2A
0,5
12,6
1,3
33
1,8
45,75
2
TCGE-0524-IR00
Ordering code
Elt Fluid S.r.l.
Via Ganapini, 15/2
Loc. Felina 42035
Castelnovo ne’ Monti (RE) ITALY
mail: info@eltfluid.com
P.IVA/C.F 02573790355
P081M-20
