1
The pressure valves VRP2 are directly operated
reducing valves for vertical stacking assemblies
designed as 3 way valves, i.e. with pressure protection of
the secondary circuit.
The valve consists of the valve body (1), control spool
(2), spring (3), adjustment element (4) and the plug
G 1/4 (5) for pressure measuring and, if necessary, of a
check valve.
Model “A”
With this model, the fluid enters into the valve body from
the primary circuit through port A1 and passes through
the metering edge, where its pressure is reduced. The
reduced pressure corresponds with the setting of the
control spring. At the same time, this pressure affects
also the surface area of the control spool opposed to the
spring (the pressure can be measured at the port G 1/4
which is normally closed by plug 5). Thus the static
balance of the spool is ensured. If the reduced pressure
changes, a respective control action takes place and the
reduced pressure returns to its preset value. The flow
from the output port A2 passes then to the user. If
pressure behind the valve increases due to the effect of
the load acting on the user, the spool shifts further
against the spring until the second metering edge opens
and the excessive flow drains through port T. The
leakage from the spring room is also routed to port T.
The reverse free-flow from port A2 to port A1 passes
through a check valve which is connected parallel to the
metering edge.
Model “B”
With model “B”, the pressure reduction follows from port
P2 to port P1, but it takes place only when the flow in port
B passes in the direction to the user (not opposite). The
protection of the secondary circuit is also ensured for
one flow direction only.
Model “P”
With model “P”, the pressure reduction follows from port
P2 to port P1, but is effective in both flow directions
through the directional valve (as well as the protection of
the secondary circuit).
The valves are delivered with basic surface treatment.
The valve body is phosphate coated, whereas the
surfaces of the other parts are zinc coated.
HA 5142
6/2012
Replaces
HA 5142 4/2008
Size 04 (D 02) · 320 bar (4600 PSI) · 20 L/min (5.3 US GPM)
Directly Operated Pressure
Reducing Valves
VRP2-04
q
For stacking assemblies
q
4 pressure ranges
q
Pressure reduction in ports A or P
q
Model “A” with check valve
q
Installation dimensions to ISO 4401/CETOP-RP 121H
Functional Description
2
HA 5142
Nominal size
mm
04 (D02)
Maximal flow
L/min (GPM )
20 (5.3)
Max. service pressure ports ( P, T, A, B )
bar (PSI)
320 (4600)
Working pressure related to flow bar (PSI) see p-Q characteristics
Hydraulic fluid
Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range
°C (°F)
-30 ... +100 (-22 ... +212)
Viscosity range
mm
2
/s (SUS)
20 .. 400 (98 ... 1840)
Maximum degree of fluid contamination
Class 21/18/15 to ISO 4406
Weight - model “A”
model “B”, “P”
kg (lb)
0.82 (1.81)
0.60 (1.32)
Mounting position
unrestricted
VRP2-04- /
Nominal size 04 (D 02)
Pressure reduction Pressure control
In port A2 from port A2
A
In port P1 from port B1 B
In port P1 from port P1 P
Reducing valve, directly operated
Pressure range
Adjustable up to 25 bar(363 PSI)
2
Adjustable up to 63 bar (914 PSI)6
Adjustable up to 160 bar(2321 PSI)16
Adjustable up to 210 bar (3046 PSI)21
Adjustment element
Screw with outside HEX 4
S
Functional Symbols
VRP 2-04-A . / . . VRP 2-04-B . / . . VRP 2-04-P . / . .
Technical Data
Ordering Code
Seals
no designation NBR
The packing foil is recyclable. The protecting plate can be returned to the manufacturer.
If the valve is used separately without a directional valve, a cover plate DK1-04/32-3 with the same installation
dimensions can be ordered. This plate connect port A1 with port P1 - see catalogue Adapter and Blanking Plates
HA 0003.
Mounting bolts M5x50 or studs must be ordered separately. Tightening torque of the screws is 5 Nm (3.7 ft-lbs).
For applications outside these parameters, please consult the manufacturer.
The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should
not be construed in any case as a guaranteed representation of the product properties in the sense of the law.
Caution!
(1) (2) (3) (4) (5) (6)
0 2 4 6 8 10 12 14 16 18 20
80
70
60
50
40
30
20
10
(1200)
(1100)
(1000)
(900)
(800)
(700)
(600)
(500)
(400)
(300)
(200)
(100)
(0)
(500)
(1000)
(1500)
(2000)
(2500)
(3000)
(3500)
(4000)
(4500)
120
160
200
240
280
320
40
80
(5) (4) (3) (2) (1) 0 (1) (2) (3) (4) (5)
20 15 10 5 0 5 10 15 20
3
HA 5142
Pressure drop [bar (PSI)]
Flow [L/min (GPM)]
Measured at n = 32 mm
2
/s (156 SUS)
Flow [L/min (GPM)]
1
2
3
Dp-Q Characteristics
p-Q Characteristics
Measured at n = 32 mm
2
/s (156 SUS)
Safety pressure [bar (PSI)]
Model “A”
Models “P” und “B”
Model “A”
Models “P” und “B”
Model “A”
Reduced pressure [bar (PSI)]
Pressure range 21
Pressure range 16
Pressure range 6
Pressure range 2
Type Dimensions, quantity Ordering number
Standard NBR
O-ring 5 x 1,8 NBR 80 (1pcs)
15915600
O-ring 12,42 x 1,78 NBR 70 (1pcs)
O-ring 18 x 2,65 NBR 70 (1pcs)
O-ring 6 x 1,5 OR1500600-N7003 (1pcs)
O-ring 20,35 x 1,78 ORAR00019-N9002 (1pcs)
DKAR 00009-N7028 5,28 x 1,68 NBR 70 (1pcs)
DKAR 00011-N7028 7,65x1,68 (4pcs)
Back-up ring BBP80B014-N9 13,16 x 15,86 x 1,14 (1pcs)
Back-up ring BBP80B115-N962N 17,83 x 22,19 x 1,14 (1pcs)
Spare Parts
1 - Pressure drop of check valve
2 - Pressure drop of reducing valve = Min. adjustable pressure range
3 - Pressure drop of relief valve = Min. adjustable safety pressure
4
HA 5142
Required surface finish of
interface.
Valve Dimensions
Dimensions in millimeters (inches)
6
1
4
2
7
35
Type VRP2-04-AS/ ..
Model „B“ an
Type VRP2-04-B(P)S/ ..
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
Model „A“
1 Name plate
2 Pressure adjustment element “S”- screw
with outside HEX 4
3 Plug for pressure gauge connection, thread G 1/4
4 Locknut HEX 13
5 Wrench flats s=24mm
5 4 through mounting holes
6 Square ring 7.65x1.68 (4 pcs.), supplied with each valve
