1
A pilot operated check valve closes tightly the hydraulic
circuit between the valve and the actuator. The valve
consists of the housing (1), one or two check valves (2),
(3) and the pilot piston (4). The main poppets of the
check valves are provided with pilot poppets (5) which
enable opening the check valve under pressure.
When fluid flows from A1 to A2 it opens the check valve
(2) and at the same time shifts the pilot piston (4) which
opens by means of the pilot poppet (5) the check valve
(3). When the pressure in channels A1 and B1 drops, the
springs push the poppets onto the seats and the circuit
between the check valve and the actuator is closed
under pressure.
To ensure that the check valves close tightly, a
directional valve with functional symbol Y is to be used,
which connects in its middle position the ports A1 and
B1 with tank T (see the typical circuit diagram).
The valve housing (1) is phosphate coated, the surfaces
of the other parts are zinc coated.
HA 5025
6/2012
Size 10 (D 05) · 350 bar (5076 PSI) · 100L/min (26.4 GPM)
Pilot Operated Check Valves
Sandwich Plates
VJR2-10/M
Replaces
HA 5025 2/2008
q
Pilot operated check valve sandwich plate
for use in stacking assemblies
q
3 models
- double valve with check valves in lines A and B
- single valve with check valve in line A
- single valve with check valve in line B
q
Installation dimensions to SO 4401
CETOP - RP 121H and NFPA T3.5.1 - D 02
Functional Description
2
HA 5025
Valve size mm (US) 10 (D 05)
Maximum flow L/min (GPM) 100(26.42 )
Maximum operating pressure bar (PSI) 350 (5076)
Cracking pressure bar (PSI) 2 (29)
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 ration (pilot piston / seat) 5,6 : 1
Mounting position unrestricted
Weight kg (lbs) 3 (6.61)
VJR2-10/M
Valve size 10 (D 05)
Modular design
Seals
no designation
V
NBR
Viton
Ordering Code
Technical Data
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
Typical circuit with pilot operated check valve
valve side
subplate side
Functional Symbols
Pilot Operated Check Valve
Sandwich Plate
VJR2-10/MA VJR2-10/MB VJR2-10/MC
Arrangement of the check valves in the valve body
3
HA 5025
Required surface finish of
interface
Valve Dimensions
Dimensions in millimeters (inches)
21
3
Dp-Q Characteristics Measured at n = 32 mm
2
/s (156 SUS)
Pressure drop Dp related to flow rate.
Flow Q [L/min (GPM)]]
Pressure drop Dp [bar (PSI)]
Flow in direction
1A1® A2 (B1 ® B2)
2A2® A1 (B2 ® B1)
1
2
Dimensions in millimeters:
1 Name plate
2 4 mounting holes
3 Seal ring (5 pcs.):
Standard (NBR) - ring NBR 70 12.42 x 1.68
Viton (FPM) - ring 12.42 x 1.78
supplied with valve
4
HA 5025
The plastic packaging is recyclable.
Mounting studs must be ordered separately. For stud kits see HU 0040.
Certified documentsation 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 - 12,42x1,68 (5 pcs.) 15991600
Viton 12,42x1,68 (5 pcs.) - 22943800
