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45 300/110 ED
VR
*
-P
CHECK VALVES
TECHNICAL SPECIFICATIONS HYDRAULIC SYMBOL
OPERATING PRINCIPLE
—VR
*
-P valves are one-way check valves constructed
in the subplate mounting version.
— In rest conditions, the valve poppet, which is a cone
on edge seal type, is kept closed by a spring with
fixed setting.
— The shutter opens when the pressure in the intake
line “A” exceeds the set value of the spring, added to
any pressure in the outlet line “B”.
— Available in three sizes for flow rates up to 400 l/min
and with three different cracking pressures.
SUBPLATE MOUNTING
p max (see table of performances)
Q max (see table of performances)
Valve code
Nominal
dimension
Maximum
flow rate
[l/min]
Mass
[kg]
Max. operating
pressure
[bar]
VR3-P 3/8” 100 2,3 350
VR5-P 3/4” 200 4,8 350
VR7-P 1¼” 400 9 250
Ambient temperature range °C -20 / +50
Fluid temperature range °C -20 / +80
Fluid viscosity range cSt 10 ÷ 400
Fluid contamination degree
According to ISO 4406:1999
class 20/18/15
Recommended viscosity cSt 25
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VR*-P
1 - IDENTIFICATION CODE
Seals:
omit for mineral oils
V = viton for special fluids
Series No.
10 for VR3-P and VR5-P
11 for VR7-P
(the overall and mounting dimensions remain
unchanged from 10 to 19)
Cracking pressure:
1 = 0,5 bar 3 = 5 bar 4 = 10 bar
Nominal dimension:
3 = 3/8” 5 = 3/4” 7 = 1 ¼”
2 - CHARACTERISTIC CURVES (values obtained with viscosity 36 cSt at 50°C)
Subplate mounting
Check valve
NOTE: Add the cracking pressure to the values
shown in the diagram.
PRESSURE DROPS ∆p - Q
V R - P / /
3 - HYDRAULIC FLUIDS
Use mineral oil-based hydraulic fluids HL or HM type, according to ISO 6743-4. For these fluids, use NBR seals. For fluids HFDR type
(phosphate esters) use FPM seals (code V). For the use of other kinds of fluid such as HFA, HFB, HFC, please consult our technical
department. Using fluids at temperatures higher than 80 °C causes a faster degradation of the fluid and of the seals characteristics.
The fluid must be preserved in its physical and chemical characteristics.
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VR*-P
5 - VR5-P OVERALL AND MOUNTING DIMENSIONS
Intake port A
2
Outlet port B
3
Identification label
4
Mounting surface with sealing
rings: 2 OR type 3100 (25.07x2.62)
1
dimensions in mm
FASTENING BOLTS
4 bolts M16x80
Torque: 170 Nm
MOUNTING
SURFACE
Intake port A
2
Outlet port B
3
Identification label
4
Mounting surface with sealing rings:
2 OR type 3068 (17.13x2.62)
4 - VR3-P OVERALL AND MOUNTING DIMENSIONS
1
dimensions in mm
FASTENING BOLTS
4bolts M10x60
Torque: 40 Nm
MOUNTING
SURFACE
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DUPLOMATIC OLEODINAMICA S.p.A.
20015 PARABIAGO (MI) Via M. Re Depaolini 24
Tel. +39 0331.895.111
Fax +39 0331.895.339
www.duplomatic.com e-mail: sales.exp@duplomatic.com
VR*-P
6 - VR7-P OVERALL AND MOUNTING DIMENSIONS
dimensions in mm
FASTENING BOLTS
4 bolts M20x90
Torque: 285 Nm
MOUNTING SURFACE
REPRODUCTION IS FORBIDDEN. THE COMPANY RESERVES THE RIGHT TO APPLY ANY MODIFICATIONS.
1 Mounting surface with sealing
rings:
N. 2 OR type 4137 (34.52x3.53)
Shore 90
2 Intake port A
3 Outlet port B
4 Identification label
