The Covers CVC*R are designed to hold Polyhydron make 2 port slip-in cartridge
valves model CV*** in the cavities machined as per ISO 7368, and are meant to
create a pilot operated relief function, when combined with a valve having a poppet
area ratio of 1:1.
The covers have options of having pressure adjustment facility by means of Set
screw or a Hand knob.Clockwise rotation of the screw increases the pressure setting.
These covers are also available with an optional facility to mount on them, a Solenoid
operated Directional Control Valve to give the combination an added feature of
unloading a pump or regulating pressure and exhausting a cylinder side by means
of an electrical signal to the Solenoid.
A Polyhydron Group Company
Description
Section
Hydraulic symbol
RELIEF COVER
Model : CVC*R
Ref. No. D 03418
Release 03 / 2015
ENGINEERING - 1 of 2
78-80, Machhe Industrial Estate,
Machhe, Belgaum - 590 014. INDIA.
Phone : +91-(0)831- 2411001
Fax : +91-(0)831- 2411002
E-mail : polyhydron@gmail.com
Website : www.polyhydron.com
X
A
B
C
Y
B
A
X
X
X
X
X
A
C
P T
BA
X
X
X
A
C
P T
BA
CVC*R**
CVC*R**A
A Type (Normally closed)
CVC*R**B
B Type (Normally open)
Mounting interface : As per ISO 7368
Working pressure : 350 bar.
Hydraulic medium : Mineral oil.
Temperature range : -20°C to + 80°C.
Viscosity range : 10 cSt to 380 cSt.
Fluid cleanliness required : ISO 4406 20/18/15 or better.
Technical specifications
C
Plugged Plugged
Y
X X
Y
B
Y
B
A/B
T
A/B
A Polyhydron Group Company
D 03418- CVC*R
ENGINEERING - 2 of 2
Unit dimensions
Dimensions in mm.
All rights reserved.
Subject to revision
Y
C
X
X
C
Y
L4
L3
32.5
31
40.5
L1 / L1* L2 / L2*
H1 / H1*H5
H2 / H2*
H4
H3 ~
5
6 A/F
L5
ØD2
Notes:
1. Cover fixing S.H.C Screws are OUT OF
SCOPE OF SUPPLY.
2. Mounting interface for Soln. D.C.V as per ISO 4401-03-02.
Cartridge Valve Cover
CVC
16 R A
16
Ordering code
Size 16, 25, 32 and 40.
For Relief function
installation dimensions remain
Design code subjected to Change .
same for design code 10 thru 19.
Soln. normally closed.
S
Set screw
Hand knob
S
H
Pressure rating in bar
25,50,100,200,315 and 400.
100
A
B
Soln. normally opened.
Omit if not required.
a
A B
P
T
Note : Solenoid (refer spool type) to be ordered seperately.
Spool type 'D'.
T
A
B
L6
4
Please consider heights H1* and H2* and lengths L1* and L2* for covers having mounting provision for solenoid
directional control valve.
*M, Cover fixing S.H.C Screw
ØD1
X
C
Y
L8 L8
L7 L7
L7
L7 L7
ØD3 drill
8 deep min.
L9
ØD4
@ X & Y.
ØD5 tap
T deep.
Cover mounting interface as per ISO 7368.
ØD2
1
1
Size
L1* L2* L3 L4 ØD1
71
85
102
125
65
85
102
125
33.5
43.5
51
62.5
32.5
42.5
51
62.5
0.8
0.8
1.2
1.2
L5
23
29
35
42.5
L6
82.5
82.5
67.5
67.5
H1*
H2*
H3 H4
55
58
58
60
42.5
45.5
48
49
160
163
163
165
25
28
30
30
Mass
Kg.
apprx
1.2
1.2
*M. 4 nos. Cover fixing
S.H.C. Screw
(Class 12.9)
M8 x 40 Long
M12 x 45 Long
M16 x 55 Long
M20 x 70 Long
Tightening
Torque.
39 Nm
135 Nm
330 Nm
650 Nm
H5ØD3 H1
H2
4
12
18
24
30
46
50
50
60
35
28
30
49
6
L7
25
33
41
50 6
6
2.5
4.0
5.0
8.0
L8
10.5
16
17
23
L1
67.5
85
102
125
16
25
32
40
L9
24.5
40
37.5
61
L2
86
82.5
67.5
67.5
T
14
20
26
33
4
6
10
8
ØD5
M8
M12
M20
M16
ØD4
max
AB T