1
Functional Description
A1
A2
B1
B2
A pilot operated check valve is used to provide leakfree
closure of a hydraulic circuit under pressure. It protects
the load against dropping should a line break occur and
ensures a stable position of a hydraulic actuator under
pressure, even during long idle periods.
The valve basically consists of housing (1), one or two
check valves (2), (3) and pilot piston (4).
When fluid flows from A1 (B1) to A2 (B2) it opens the
check valve (2), (3) and at the same time shifts the pilot
piston (4) to the right (left), thus opening the way B2®B1
(A2®A1). When the pressure drops (e.g. after shifting
the directional valve into its middle position), the springs
push the balls onto the seats and the circuit between the
check valve and the actuator is closed under pressure.
To ensure that the ball valves seat properly and that they
perfectly close ports A2 and B2, a directional valve with
functional symbol Y is to be used, which connects in its
neutral position both sides of the pilot piston (4) with
tank.
The valve housing surface is phophate coated, the
surfaces of the other parts are zinc coated.
HA 5023
5/2012
Size 04 (D 02) · 320 bar (4600 PSI) · 20 L/min (5.3 GPM)
Pilot Operated Check Valves
Sandwich Plates
VJR1-04/M
Replaces
HA 5023 5/2008
q
Sandwich plate design for use in vertical stacking assemblies
q
3 models:
- leakfree closure of both sides with check valves
in lines A and B
- leakfree closure with check valve in line A
- leakfree closure in line B
q
Installation dimensions acording to
ISO 4401 / DIN 24 340
2
HA 5023
Functional Symbols
VJR1-04/M
Modular design
Valve size 04 (D 02)
Pilot Operated Check Valve
Sandwich Plate
Functional Symbols
A
B
C
check valve in line A*
check valve in line B*
check valves in lines A and B*
* see the table Functional symbols
Seals
no designation
V
(NBR)
FPM (Viton)
Ordering Code
Valve size mm (US) 04 (D 02)
Maximum flow L/min (GPM) 20 (5.28)
Maximum operating pressure bar (PSI) 320 (4600)
Cracking pressure bar (PSI) 1(14.5 )
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range (NBR) °C (°F) -30...+100 (-22 ... +212)
Fluid temperature range (Viton) °C (°F) -20...+120 (-4 ... +248)
Viscosity range mm
2
/s (SUS) 20...400 (98 ... 1840)
Maximum degree of fluid contamination Class 21/18/15 to ISO 4406
Area ratio (pilot piston / seat) 3 : 1
Mounting position unrestricted
Weight kg (lbs) 0,7(1.54)
Technical Data
VJR1-04/MA VJR1-04/MB VJR1-04/MC
Typical circuit with pilot operated check valve
Arrangement of the check valves in the valve body
valve side
subplate side
3
HA 5023
(1.06) (2.11) (3.17) (4.23) (5.28) (6.34)
0 2 4681012141618202224
(58)
(116)
(174)
(232)
(290)
(348)
4
8
12
16
20
24
Pressure drop Dp [bar(PSI)]
Flow Q [L/min (GPM)]
15963900
Required surface finish of
interface
Dimensions in millimeters:
1 Name plate
2 4 mounting holes
3 Square ring 7.65 x 1.68 (4 pcs.)
supplied with valve
12
3
Dp-Q Characteristics Measured at n = 32 mm
2
/s (156SUS)
Pressure drop Dp related to flow rate.
Flow in direction
1A1® A2 (B1 ® B2)
2A2® A1 (B2 ® B1)
1
2
Valve Dimensions Dimensions in millimeters and inches
4
HA 5023
The plastic packaging is recyclable.
Mounting studs must be ordered separately. For stud kits see data shet HU 0020.
Certified documentation is available per request.
Spare Parts
Dimensions in millimeters
Caution!
Subject to alteration without notice!
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
Tel.: +420-499-403111, Fax: +420-499-403421
E-mail: sales.cz@argo-hytos.com
www.argo-hytos.com
Seal kit
Type
Dimensions, quantity
Ordering number
O-ring Square ring
Standard NBR70 - 7,65 x 1,68 (4 pcs.) 20718400
Viton 7,65 x 1,68 (4 pcs.) - 28618000
