RCG-** Model Shown RCT-** Model Shown
March 1996 GB-2481
R(C)G(O)-03, 06 and 10; R(C)T(O)-03, 06 and 10
Sectional Illustrations
General Description
The R and RC series valves are of the
pressure actuated sliding spool type
which can be adapted to perform
various circuit functions. These
functions, depending on assembly build,
include relief valve, sequence valve and
counterbalance valve.
Normally Closed Models, R(C)* Series
Back Pressure Valve – Type 1
Internal drain, directly operated. Used
for creating back pressure or for
overload protection in low pressure
circuits up to 35 bar when the secondary
port is connected directly to tank.
When provided with an integral check it
can be used as a counterbalance or
brake valve.
Sequence Valve – Type 2
External drain, directly operated. Used
to maintain a minimum pressure at the
primary port for a holding operation
while permitting pressure build-up
downstream of the secondary port
outlet.
Sequence Valve – Type 3
External drain, remotely operated.
Operation is the same as Type 2 except
that it is remotely operated. The valve
can be used to sequence independently
of the primary pressure.
Unloading Valve – Type 4
Internal drain, remotely operated. Here
the secondary port must be connected
directly to tank; application of external
pressure opens the valve fully,
independent of the primary pressure.
Basic Characteristics
Type Sliding spool. . . . . . . . . . . . . . . . . . .
Mounting Subplate or manifold. . . . . . . .
Pipe mounted
Operating
pressure 210 bar (3000 psi) max.. . . . .
Nominal flow Up to 284 L/min. . . . . . . . .
(75 USgpm)
When provided with an integral check it
can be used as a remotely operated
counterbalance or brake valve.
Integral Check – Type RC
Allows free reverse flow.
Auxiliary Remote Control – P feature
Available only on certain R(C)G and
R(C)T models with pressure ranges A,
B, D and F. Here low pressure remote
control is achieved via the auxiliary port.
Normally Open – Type R(C)*O
Here the operation is such that pilot
pressure closes the valve. It is used in
special counterbalance or decompression
circuits.
VICKERS
®
Pressure Relief
Pressure Control Valve
Functional Symbols and Basic Models
Surface (Gasket) Mounting RCG
Threaded Port RT
Threaded Port RCT
Back pressure valve,
directly operated, internal
drain, type 1
Sequence valve, directly
operated, external drain,
type 2
Sequence valve, remotely
controlled, external drain,
type 3
Unloading valve, remotely
controlled, internal drain,
type 4
Back pressure valve,
directly operated, internal
drain, type 1
Sequence valve, directly
operated, external drain,
type 2
Sequence valve, remotely
controlled, external drain,
type 3
Counterbalance valve,
remotely controlled,
internal drain, type 4
Back pressure valve,
directly operated, internal
drain, type 1
Sequence valve, directly
operated, external drain,
type 2
Sequence valve, remotely
controlled, external drain,
type 3
Unloading valve, remotely
controlled, internal drain,
type 4
Counterbalance valve,
directly operated, internal
drain, type 1
Sequence valve, directly
operated, external drain,
type 2
Sequence valve, remotely
controlled, external drain,
type 3
Counterbalance valve,
remotely controlled,
internal drain, type 4
2
a) Functional Symbols for “Normally Closed” Valves
Surface (Gasket) Mounting RG
Surface (Gasket) Mounting RCGO
Threaded Port RTO
Threaded Port RCTO
Normally open sequence
valve, remotely controlled,
external drain, type 3
Normally open loading
valve, remotely controlled,
internal drain, type 4
Normally open sequence
valve, directly operated,
external drain, type 2
Normally open sequence
valve, remotely controlled,
external drain, type 3
Normally open counterbalance
valve, remotely controlled,
internal drain, type 4
Normally open sequence
valve, directly operated,
external drain, type 2
Normally open sequence
valve, remotely controlled,
external drain, type 3
Normally open loading
valve, remotely controlled,
internal drain, type 4
Normally open sequence
valve, directly operated,
external drain, type 2
Normally open sequence
valve, remotely controlled,
external drain, type 3
Normally open counterbalance
valve, remotely controlled,
internal drain, type 4
Normally open sequence
valve, directly operated,
external drain, type 2
“P” Connection
“P” Connection
3
b) Functional Symbols for “Normally Open” Valves
Surface (Gasket) Mounting RGO
Functional Symbols for Auxiliary
Remote Control Connection
(“P” Feature)
This option provides a control pressure
range of nominally 12.5% of the
normally required control pressure
range for the A, B and D pressure
ranges and at 6.25% for the F pressure
range. This feature is only available for
certain valves with pressure ranges of
A, B, C and F. It is not available for
R(C)G(O)-03 models.
Model Code
F3 R -(O)
1
1
2
3
Special seals
See “Hydraulic Fluids” section
Pressure control valve
Integral check valve
Omit if not required
Type of mounting
G = Gasket for subplate or manifold
T = Pipe mounted
Normally open valve
Omit if not required
Not available for type 1 valves
Nominal valve size
03 =
3
/
8
I nominal bore pipe size
06 =
3
/
4
I nominal bore pipe size
10 = 1
1
/
4
I nominal bore pipe size
4
5
9
** -
3
(P)
Pressure range
(For availability see table below)
X = 0,7 - 2,1 bar (10 - 30 psi)
Y = 1,4 - 4,1 bar (20 - 60 psi)
Z = 2,4 - 8,6 bar (35 - 125 psi)
A = 5,2 - 17,2 bar (75 - 250 psi)
B = 8,6 - 34,5 bar (125 - 500 psi)
D = 17,3 - 69,0 bar (250 - 1000 psi)
F = 34,5 - 138,0 bar (500 - 2000 psi)
Auxiliary low pressure remote
control connection
Only available for pressure ranges A, B,
D and F.
Not available for R(C)G(O)-03 models.
Omit if not required.
Valve type
1 = Internally piloted, internally
drained
2 = Internally piloted, externally
drained
3 = Externally piloted, externally
drained
4 = Externally piloted, internally
drained
-C
2
*-
6
*
7
*
9
** -
10
**
4 5 8 11
6
7
8
10
11
Design number
Currently
22, for R(C)*(O)-10
23, for RT(O)-03, R(C)G(O)-03/06 and
R(C)T(O)-06
30, for RCT-03
Subject to change. Installation
dimensions remain as shown for design
numbers *0 to *9 inclusive.
Main port tappings/fixing bolts
UA = NPT pipe
threadsY
UB = G pipe threads
(BSPF, ISO,
228)
UG= Dual metric/inch fixing bolt facility,
R(C)G(O) models only
Omit for RCT-03 (NPT main ports)
Y Check with your Vickers representative
for availability.
RT-03 and
R(C)T(O)-06/10
models only
Performance Data
Maximum Pressures
Main portsY 210 bar (3000 psi). . . . . . .
Remote pressure
control ports As above, for main ports. .
Auxiliary remote
pressure control
port “P” feature 140 bar (2000 psi). . . . .
Drain portY
(all models) 140 bar (2000 psi). . . . . . . .
Y The normal outlet of valve types 1 and 4
must be piped to reservoir at atmospheric
pressure. The drain port on types 2 and 3
should similarly be piped directly to
reservoir at atmospheric pressure. Any
pressure at the drain port is additive to the
pressure setting of the valve.
4
Features in brackets ( ) may be omitted. All other features must be specified.
Basic
model
designation
“P” feature J
Principal adjustable pressure
range (bar) and model code
reference letter
X
=
Y
Z
Z
A
B
D
=
F
,1 =
X
4
,1 =
Y
8
,6 =
Z
,6 =
Z
,2 =
4
,5 =
B
6
9 =
3
8 =
7
- 2,
4 - 4
,
7
- 8,
4
- 8,
6
- 17,
2
- 34,
5
,3 -
6
5
- 1
3
0,
7
1,
4
1,
7
2,4
5,2
-
8,6
-
17,
3
34,5
R(C)G
or
Without feature F F F F F F F
or
R(C)T
With feature F F F F
J Adjustable pressure range at ‘P’ feature port is nominally 12.5% of the A, B and D ranges
and 6.25% of F range.
5
Maximum Recommended Flow Rate
Valve model code
Flow rate
L/min (USgpm)
R**-03
R**-06
R**-10
45 (12)
113 (30)
284 (75)
Hydraulic Fluids
Materials and seals used in these
valves are compatible with:
Anti-wear petroleum oils L-HM. . . . . . . .
Non-alkyl based
phosphate esters L-HFD. . . . . . . . . . . . .
The extreme operating range is 13 to
500 cSt (70 to 2300 SUS) but the
recommended running range is 13 to
54 cSt (70 to 250 SUS). For further
technical information about fluids see
Technical Information leaflet B-920 or
I-286-S.
Contamination Control Requirements
Recommendations on contamination
control methods and the selection of
products to control fluid condition are
included in Vickers publication 9132 or
561, “Vickers Guide to Systemic
Contamination Control”. The book alos
includes information on the Vickers
concept of “ProActive Maintenance”.
The following recommendations are
based on ISO cleanliness levels at
2 mm, 5 mm and 15 mm. For products in
this catalog the recommended levels
are:
0 to 210 bar (3000 psi) 18/16/13. . . . . .
Temperatures
For petroleum oil:
Min. –20_ C (–4_F). . . . . . . . . . . . . . . . . .
Max.* +70_C (158_F). . . . . . . . . . . . . . . .
* To obtain optimum service life from both
fluid and hydraulic system, 65_C (150_F)
normally is the maximum temperature.
For other fluids where limits are outside
those of petroleum oil, consult fluid
manufacturer or Vickers representative.
Whatever the actual temperaure range,
ensure that viscosities stay within those
specified under “Hydraulic Fluids”.
Ambient for:
All valves at full performance
specification: 0 to +70_C (32 to
+158_F).
Storage:
–25 to +85_C (–13 to +185_F)
Pressure Adjustment
Adjust pressure by loosening locknut
and turning adjusting screw in
appropriate direction, clockwise to
increase pressure counter-clockwise to
decrease pressure.
Pressure settings must be at least
17 bar (250 psi) lower than the system
relief setting.
The remote pressure control connection
on valve types 3 and 4 must be
connected to an external pilot pressure
source sufficient to operate the valve at
the desired pressure and flow
conditions.
All models, except those with X, Y or Z
pressure range and all R(C)G(O)-03, are
available with an auxiliary remote control
connection. Required pressure at the
auxiliary connection is 6.25% of the
normally required control pressure for
the F pressure range and 12.5% of the
normally required control for the A, B
and D pressure range.
Installation Dimensions in mm (inches)
6
RG(O)-03/06/10
6,4 (0.25)
H mounting holes Ø10,4 (0.409 dia)
thru, counterbored Ø15,0 (0.59 dia)
Secondary
pressure gage
connection G
1
/
4
Adjusting screw
E
Locknut
Primary pressure
gage connection
G
1
/
4
Drain port
D
Ø6,4 (0.25 dia)
A
max.
Remote
pressure
control port
Auxiliary remote
pressure control port,
“P” models only
Secondary outlet port
B
C
Pressure inlet port
G
F
Mounting surface
(seals supplied)
3rd angle
projection
Model A B C D E F G H
RG-03
RG-06
RG-10
177,8 (7.0)
200,2 (7.88)
277,9 (10.94)
39,9 (1.57)
55,7 (2.19)
54,7 (2.15)
29,7 (1.17)
44,7 (1.76)
44,7 (1.76)
66,5 (2.62)
79,2 (3.12)
100,0 (3.94)
36,6 (1.44)
41,1 (1.62)
50,8 (2.0)
57,1 (2.25)
71,4 (2.81)
95,3 (3.75)
57,0 (2.24)
69,6 (2.74)
90,4 (3.56)
4
4
6
7
RCG(O)-03/06/10
3rd angle
projection
6,4 (0.25)
H mounting holes Ø10,4 (0.409 dia) thru,
counterbored Ø15,0 (0.59 dia)
Secondary
pressure gage
connection G
1
/
4
Adjusting screw
E
Locknut
Primary pressure
gage connection
G
1
/
4
Drain
port
D
Ø6,4 (0.25 dia)
A
max.
Remote
pressure
control port
Auxiliary remote
pressure control port,
“P” models only
Secondary outlet
and free reverse
flow inlet
B
C
Pressure inlet and
free reverse flow
outlet
G
F
Mounting surface
(seals supplied)
Model A B C D E F G H
RCG-03
RCG-06
RCG-10
177,8 (7.0)
200,2 (7.88)
277,9 (10.94)
39,9 (1.57)
55,7 (2.19)
54,7 (2.15)
29,7 (1.17)
44,7 (1.76)
44,7 (1.76)
90,4 (3.56)
98,6 (3.88)
130,8 (5.15)
36,6 (1.44)
41,1 (1.62)
50,8 (2.0)
57,1 (2.25)
71,4 (2.81)
95,3 (3.75)
57,0 (2.24)
69,6 (2.74)
90,4 (3.56)
4
4
6
8
RT(O)-03/06/10
3rd angle
projection
A
max.
Remote pressure
control connection J
Auxiliary remote pressure
control port, “P” models only J
Secondary
pressure gage
connection F
Secondary outlet
port, see Model
Code for tapping
options
Adjusting screw
JG
F
G
J
J
B
C
H
E
D
L
Pressure inlet/outlet ports, see
Model Code for tapping options
K
Locknut
Primary pressure
gage connection F
Drain connection
1
/
4
I NPT
J RT-03
9
/
16
I-18 UNF-2B SAE O-ring port. . . . . . . . .
All others
1
/
4
I NPT. . . . . . . . . . . . . . . . . . . . . . . . . . .
F RT-03
7
/
16
I-20 UNF-2B SAE O-ring port. . . . . . . . .
UA- suffix models
1
/
4
I NPT. . . . . . . . . . . . . . . . . . . .
UB- suffix models G
1
/
4
. . . . . . . . . . . . . . . . . . . . . . . .
Model A B C D E F G H J K L
RT-03 177,8
(7.0)
97,0
(3.82)
54,0
(2.13)
58,7
(2.31)
23,1
(0.91)
70,0
(2.76)
59,4
(2.34)
39,6
(1.56)
35,1
(1.38)
42,9
(1.69)
37,3
(1.47)
RT-06 200,2
(7.88)
97,0
(3.82)
74,9
(2.95)
79,5
(3.13)
26,9
(1.06)
93,0
(3.66)
76,0
(2.99)
49,3
(1.94)
50,8
(2.0)
57,2
(2.25)
45,2
(1.78)
RT-10 277,9
(10.94)
154,2
(6.07)
84,3
(3.32)
80,5
(3.17)
28,7
(1.13)
118,0
(4.65)
98,6
(3.88)
68,3
(2.69)
86,4
(3.40)
70,9
(2.79)
57,2
(2.25)
9
RCT(O)-03/06/10
A
max.
Remote pressure
control connection J
Secondary
pressure gage
connection F
Secondary outlet
port, see Model
Code for tapping
options Y
Adjusting screw
JG
G
J
J
B
C
H
E
D
Pressure inlet/outlet ports, see
Model Code for tapping options B
Locknut
Primary pressure
gage connection F
Drain connection J
K
F
Auxiliary remote pressure
control port, “P” models only J
L
M
3rd angle
projection
J RCT-03
9
/
16
I -18 UNF-2B SAE O-ring port. . . . . . .
All others
1
/
4
I NPT. . . . . . . . . . . . . . . . . . . . . . . . . .
F RCT-03
7
/
16
I -20 UNF-2B SAE O-ring port. . . . . . .
UA- suffix models
1
/
4
I NPT. . . . . . . . . . . . . . . . . . .
UB- suffix models G
1
/
4
. . . . . . . . . . . . . . . . . . . . . . .
Y Also free reverse flow inlet.
B Also free reverse flow outlets.
Model A B C D E F G H J K L M
RCT-03 177,8
(7.0)
97,0
(3.82)
54,0
(2.13)
58,7
(2.31)
23,1
(0.91)
70
(2.76)
59,4
(2.34)
39,6
(1.56)
35,1
(1.38)
93,7
(3.69)
42,9
(1.69)
37,3
(1.47)
RCT-06 200,2
(7.88)
97,0
(3.82)
74,9
(2.95)
79,5
(3.13)
26,9
(1.06)
93
(3.66)
76,0
(2.99)
49,3
(1.94)
50,8
(2.0)
107,0
(4.21)
57,2
(2.25)
45,2
(1.78)
RCT-10 277,9
(10.94)
154,2
(6.07)
84,3
(3.32)
80,5
(3.17)
28,7
(1.13)
118
(4.65)
98,6
(3.88)
68,3
(2.69)
86,4
(3.40)
147,6
(5.81)
70,9
(2.79)
57,2
(2.25)
Directly operated,
internal drain, type 1
Directly operated,
external drain, type 2
Remotely controlled,
external drain, type 3
Port
plugged
Remote
pressure control
port
Port
plugged
Port
plugged
Port
plugged
Drain
port
Drain
port
Port
plugged
Port
plugged
Port
plugged
Remote
pressure control
port
Port
plugged
Remotely controlled,
internal drain, type 4
Remote
pressure
control
connection
Port
plugged
Port
plugged
Port
plugged
Drain
connection
Drain
connection
Remote
pressure
control
connection
Port
plugged
Directly operated,
internal drain, type 1
Remotely controlled,
external drain, type 3
Remotely controlled,
internal drain, type 4
Directly operated,
external drain, type 2
10
Basic Models
Basic models are distinguished by the
relative orientation of top and bottom
caps and by the presence or absence of
port plugs in the caps.
R(C)G Models
R(C)T models
Note: Type 2, 3 and 4 illustrations also
apply to “normally open” models,
available only in the R(C)GO and
R(C)TO ranges. Functional symbols.
11
E-RXGM-10(X) Subplate
92,86 (3.65)
21,49
(0.85)
48,4
(1.91)
3,97 (0.16)
20,6
(0.81)
11,2
(0.44)
96,83 (3.81)
138,1 (5.43)
161,0 (6.34)
C
62,71
(2.47)
B
84,1
(3.31)
95,4
(3.76)
147,0
(5.79)
16,9
(0.67)
24,6
(0.97)
42,1
(1.66)
59,5
(2.34)
67,5
(2.66)
Ø10,8
(0.425 dia)
Ø17,0
(0.67 dia)
12,0
(0.47)
47,75
(1.88)
22,4
(0.88)
2 holes Ø7,1 (0.28 dia) x
7,9 (0.31) deep for
location pins Y
For remote pressure control:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
For drain:
Ø4,8 (0.19 dia) at
mounting face
G
1
/
4
on rear face
E-RXGM-10*-P-20R only:
For auxiliary remote pressure
control:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
2 Main ports on rear face, tapped A
2 holes Ø28,6 (1.125 dia) at mounting face
6 holes tapped
M10 x 24,0 (0.94)
deep
OUT
IN
119,3 (4.7)
11,2 (0.44)
31,4
(1.24)
(1)
(2)
Y Pin at location (1) for pilot operated
check valves; at location (2) for pressure
reducing valves.
When a subplate is not used, a
machined pad (as indicated by shaded
area) must be provided for mounting.
The pad must be flat within 0,013 mm
(0.0005 in) and smooth within 1,6 mm
(63 microinch). Mounting bolts provided
by the customer should be Class 12,9
(ISO 898) or better.
Model A B C
E-RXGM-10-20R
E-RXGM-10X-20R
G1
1
/
4
G1
1
/
2
76,2 (3.0)
78,1 (3.1)
7,9 (0.31)
6,0 (0.24)
12
E-RXGM-06
Subplate
20,6
(0.81)
73,0 (2.87)
39,7
(1.56)
6,35 (0.25)
22,2
(0.87)
11,2 (0.44)
79,4 (3.12)
123,8 (4.87)
146,2 (5.76)
44,5
(1.75)
82,8
(3.26)
118,0
(4.65)
16,7
(0.66)
39,7
(1.56)
60,4
(2.38)
Ø10,8
(0.425 dia)
Ø17,0
(0.67 dia)
8,7 (0.34)
19,1
(0.75)
1 hole Ø7,1 (0.28 dia)
x 7,9 (0.31) deep
For remote pressure control:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
For drain:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
For remote pressure control:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
2 Main ports on rear face, tapped A
2 holes Ø23,0 (0.9 dia) at mounting face
4 holes tapped
thru M10
75,6 (2.98)
11,1
(0.44)
37,1
(1.46)
OUT
IN
B
49,2
(1.93)
11,2 (0.44)
28,8 (1.13)
101,6 (4.0)
When a subplate is not used, a
machined pad (as indicated by shaded
area) must be provided for mounting.
The pad must be flat within 0,013 mm
(0.0005 in) and smooth within 1,6 mm
(63 microinch). Mounting bolts provided
by the customer should be Class 12,9
(ISO 898) or better.
Model A B
E-RXGM-06-20R
E-RXGM-06X-20R
G
3
/
4
G1
34,9 (1.37)
41,2 (1.62)
13
E-RXGM-03
Subplate
When a subplate is not used, a
machined pad (as indicated by shaded
area) must be provided for mounting.
The pad must be flat within 0,013 mm
(0.0005 in) and smooth within 1,6 mm
(63 microinch). Mounting bolts provided
by the customer should be Class 12,9
(ISO 898) or better.
33,3
(1.31)
19,8
(0.78)
11,5 (0.45)
60,8 (2.39)
66,7 (2.63)
106,3 (4.18)
31,75
(1.25)
54,4
(2.14)
76,2
(3.0)
4,7
(0.18)
7,1
(0.28)
35,7
(1.41)
42,9
(1,69)
Ø10,8
(0.425 dia)
Ø17,0
(0.67 dia)
9,5 (0.37)
19,1
(0.75)
1 hole Ø7,1 (0.28 dia)
x 7,9 (0.31) deep
For remote pressure control:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
For drain:
Ø4,8 (0.19 dia) at mounting face
G
1
/
4
on rear face
2 Main ports at mounting face, tapped A
2 holes Ø14,3 (0,56 dia) on rear face
4 holes tapped thru M10
58,7 (2.3)
OUT
IN
7,9
(0.31)
129,3 (5.1)
21,45
(0.84)
B
25,4
(1.0)
87,3 (3.44)
11,5 (0.45)
16,7 (0.66)
5,8 (0.23)
Model A B
E-RXGM-03-20R
E-RXGM-03X-20R
G
3
/
8
G
1
/
2
38,1 (1.5)
40,4 (1.59)
14
Mass
Valve model code Mass kg (lb)
RG(O)-03
RG(O)-06
RG(O)-10
RCG(O)-03
RCG(O)-06
RCG(O)-10
RT(O)-03
RT(O)-06
RT(O)-10
RCT(O)-03
RCT(O)-06
RCT(O)-10
3,7 (1.7)
6,4 (2.9)
12,0 (5.5)
4,2 (2.0)
7,0 (3.2)
13,0 (5.9)
2,8 (1.3)
5,7 (2.6)
12,1 (5.5)
3,0 (1.4)
5,9 (2.7)
13,0 (5.9)
Mounting Attitude
Optional, horizontal preferred.
Ordering Procedure
When ordering a unit please specify the
complete model code which is
applicable to your requirements.
Subplates and bolt kits are supplied as
separate units and therefore must be
ordered as such.
Example
Valve RG-06-A-2-23-UG. . . . . . . . . . . . .
Subplate E-RXGM-06X-20R. . . . . . . . . .
Bolt kit BKRX-06-661M. . . . . . . . . . . . . .
Bolt kits available
Model code
BKRX-03-660M M10 x 70. . . . . . . . . . . .
BKRX-06-661M M10 x 80. . . . . . . . . . . .
BKRX-10-662M M10 x 110. . . . . . . . . . .
