Pressure limiting valves - assembly kits
D 7000 E/1
Pressure limiting valves
- assembly kits
February 2009-04
HAWE HYDRAULIK SE
STREITFELDSTR. 25 • 81673 MÜNCHEN
2.3
© 1977 by HAWE Hydraulik
Pressure limiting valves - assembly kits
These pressure limiting valves are ideally suited to be integrated in customer furnished valve housings or manifolds. The table below lists
the available assembly kits, consisting of valve seat + valve ball, spring etc. The basic valve design is similar to the pressure limiting valves
(with/without damping) illustrated in pamphlet D 7000/1.
The pressure relief valves are not suited for safeguarding pressure devices acc. to Pressure Equipment Directive 97/23/EC. There are also
versions available featuring unit approvals, see D 7000 TÜV, D 7710 TÜV, D 6905 TÜV.
1. Available versions, main data
Order examples:
MVA 6 A
MVD 5 B R X
Basic type coding, design
X = Undamped version
(see D 7000/1 sect. 1)
Version and coding
Spring dome
made of zinc
die-casting
Perm. pressure
at P = 700 bar
at R = 20 bar
Perm. pressure
at P = 700 bar
at R = 200 bar
MV..4 = 300 bar
Perm. pressure
at P = 700 bar
at R = 350 bar
Spring dome made of steel
MVF
1
)
MVB MVH
MVJ
3
)
MVZ
1
)
MVD
1
)
MVA
1
)
MVK
1
) MVU
1
)
A travel stop prevents too high lift of the valve ball with the
damping piston then jamming the valve passage. This could
occur otherwise when the spring is completely decompressed
or at excessive flow rates.
Ball seated valve with an dynamically acting lifting aid,
making the pressure setting rather unaffected from the
respective flow.
The spring loaded damping piston with ist long guide pre-
vents chatter over a wide viscosity range. For pressure limit-
ing valves without damping, see D 7000/1 sect. 1
Special benefits:
Valves with peened valve seat
Valves with screwed-in valve seat
Adjustability during operation
Pressure range
Size
1
) Only available with size 4, 5 and 6
2
) Settings below 10 ... 15% of p
max
are not recom-
mended. The lowest, achievable pressure with the
spring completely decommpressed, depends also
on the design related back pressure (dep. on flow),
see D 7000/1, sect. 3.2)
3
) Only size 6 available, perm. pressure at R = 50 bar
4
) Only types MVF, MVB, MVD, and MVA
5
) Only size 8
No coding Standard, tool adjustable
(Slotted screw and jam nut)
R Manually adjustable
(Wing screw and wing nut)
V
1
)
4
) Turn knob (self locking)
Turn knob, with lock
H
1
)
4
) Keys conforming the regulations of the
automotive industry; One key is scope
of delivery (usually anyway in the pos-
session of the authorized work staff)
Coding
(0)
2
) ... p
max
(bar)
Coding
4
5
6
8
Flow Q
max
(lpm) with
pressure range (coding)
A
700
B
500
400
5
)
C
315
E
160
F
80
A
12
20
40
---
B
20
40
75
160
C
20
40
75
160
E
20
40
75
160
F
20
40
75
---
Pressure p
max
= 700 bar; Flow Q
max
= 160 lpm
Flow pattern symbols
Standard,
tool ad-
justable
Manually adjustable:
Coding
R and V
Coding H
D 7000 E/1 page 2
2. Unit dimensions
2.1 Valves with peened seat
All dimensions in mm, subject to change without notice !
Type MVF 4(5, 6)
Type MVZ 4(5, 6)
Type MVB 4(5, 6, 8) Type MVH 4(5, 6, 8)
MVJ 6
Tool adjustable
(standard)
Means of adjust-
ment coding R
Provision
for a lead
seal
O-ring NBR 90 Sh
Seal ring
DIN 7603-St
(size 4 and 6)
DIN 7603-Cu
(size 5 and 8)
Size
4
5
6
8
a
37
41
49
--
b
23
28
30
45
h
40
42
44
59
h
1
26
29
29
37
h
2
46.5
49
59.5
83
h
3
38
42.5
52.5
74
h
4
8
10.5
8.5
---
x
30°
35°
35°
---
SW
17/22
2
)
27
30
41
SW
1
13
13
13
17
Seal ring
DIN 7603-..
A 18x22x1.5
A 22x27x1.5
A 26x30x2
A 33x39x2
MVF
5...5.5
5...5.5
9...9.5
---
MVB
5.5...6
5.5...6
9.5...10
39
MVH(Z) MVJ 6
80 ---
60 ---
160 100
300 ---
c
28
*
0.1
32
*
0.1
38
*
0.1
---
Mounting
screws flange
body
Screw-in
spring dome
Torque for steel (Nm)
Mounting holes:
For type MVF.. and MVB..
For type MVH.. and MVJ 6 For type MVZ..
1
) 7 with MVJ 6
Size
4
5
6
8
G
1
M 18x1.5
M 22x1.5
M 26x1.5
M 33x1.5
D
1
22
27
30
39
d
6
9
12
16
e
2
4
2
4
--
t
7
7
10
14
17
t
9
15
20
24
26
t
10
12
13
14.5
16.5
t
11
15.5
18
21
25
t
12
41
45
58
--
t
13
45
50
64.5
--
u
0.7
1
1
1
x
2
60°
60°
55°
35°
x
3
45°
30°
45°
45°
g
M5, 6 deep
M5, 7 deep
M6, 7 deep
M8, 9 deep
D
2
18.2
22.2
26.2
33.2
D
3
15.3
19
22
29
D
5
8.2
10.4
13
17
D
4
10
+
0.1
12
+
0.1
16
+
0.1
20
+
0.1
t
8
3.6
+
0.1
3.5
+
0.1
4
+
0.1
7.5
+
0.1
Size 4
Size 4, 5,
and 6
Size 8
Size 5
Size 4, 6
and 8
Angle for hole d either
x
3
° or 90°
Means of adjust-
ment coding V
Means of adjust-
ment coding H
Size 4 5 6 8
O-ring 15.6x1.78 18.77x1.78 22x2 29.82x2.62
h
5
h
6
58 41
58 41
64 56
--- ---
h
max
approx.
h
1
max
approx.
SW = a/f
2
) in type MVZ 4
D 7000 E/1 page 3
Tool adjustable
(standard)
Means of adjust-
ment coding R
1
)
Seal ring
DIN 7603-St (size 4 and 6)
DIN 7603-Cu (size 5 )
Size
O-ring
NBR 90 Sh
4
15.6x1.78
5
18.77x1.78
6
22x2
Type MVD 4(5, 6)
Type MVU 4(5, 6)
Type MVA 4(5, 6) Type MVK 4(5, 6)
O-ring
Size
4
5
6
a
37
41
49
b
23
28
30
h
40
42
44
h
1
26
29
29
h
2
46.5
49
59.5
h
3
38
42.5
52.5
h
4
8
10.5
8.5
x
30°
35°
35°
SW
22
27
30
SW
1
10
13
13
Seal ring
DIN 7603-..
A 18x22x1.5
A 22x27x1.5
A 26x30x2
MVD
5 ... 5.5
5 ... 5.5
9 ... 9.5
MVA
5.5 ... 6
5.5 ... 6
9.5 ... 10
MVK, MVU
50
60
160
35
70
90
c
28
*
0.1
32
*
0.1
38
*
0.1
Mounting
screws flange
body
Screw-in
spring
dome
Screw-in
valve seat
Torque for steel (Nm)
Mounting holes:
For type MVD.. and MVA.. For type MVK.. For type MVU..
Size
4
5
6
G
M 14x1.5
M 16x1.5
M 20x1.5
G
1
M 18x1.5
M 22x1.5
M 26x1.5
D
1
22
27
30
d
6
9
12
e
2
2.5
1
e
1
1
2.5
1
t
7
8
12
t
2
10
15
19
t
1
12
14.5
19.5
t
4
20.5
22.5
25.5
t
6
49.5
54.5
69
t
3
16
17
18
t
5
45
49
62
u
0.7
1
1
x
1
30°
40°
40°
g
M5, 6 deep
M5, 7 deep
M6, 7 deep
D
2
18.2
22.2
26.2
D
15.5
19
22
2.2 Valves with one screw-in seat
Provision
for a lead
seal
Screw-in
valve seat
Angle for hole
d either
45° or 90°
Angle for hole
d either
x
1
° or 90°
Size 4
Size 5
and 6
1
) For means of adjustment coding V and H, see sect. 2.1
h
max
approx.
h
1
max
approx.
SW = a/f
D 7000 E/1 page 4
4. Assembly and peening manual for type MVF, MVB, MVH, MVJ, and MVZ
Material:
Drawn or
forged steel
Ram
Peening tool
(See listing of HAWE-
tools below)
Size 4, 5,
and 6
Size 8
Valve seat
Suited for
valve
MVF(B, H) 4
MVZ 4
MVF(B, H) 5
MVZ 5
MVF(B, H, J) 6
MVZ 6
D
15.25
- 0.05
16.3 - 0.1
18.8 - 0.1
20.3 - 0.1
21.9 - 0.1
24.3 - 0.1
Peening
depth t (mm)
0.7
+0.05
0.7
+0.05
0.8
+0.1
0.7
+0.05
Peening
force (N)
2
)
approx.
50000
approx.
65000
approx.
100000
approx.
90000
Attention:
For shape and dimensions of the valve
seat’s mounting hole, see mounting notes
(page 2 and 3)
2
) It is recommended to increase the peening force in
steps always checking the resulting peening depth t
until the specified figures are achieved.
1
) On enquiry
3. Mass (weight) approx. g
Type
Size 4
Size 5
Size 6
Size 8
MVD
130
160
250
---
MVA
140
190
290
---
MVK
130
200
270
---
MVU
100
160
230
---
MVF
120
150
230
---
MVB
130
180
270
700
MVH
120
190
250
700
MVJ
---
---
250
---
MVZ
90
150
210
---
Size
4
5
6
8
MVF
MVB
W1-201
W1-310/3
W1-311/2
W1-304
MVH
W1-309/1
W1-310/1
W1-311/1
W1-304/1
MVZ
1
)
1
)
1
)
---
MVJ
---
---
W1-311/1
---
Tool order codings
MVB(H) 8
28.9
- 0.1