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YARWAY MODEL 20 PNEUMATIC DIAPHRAGM ACTUATOR
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
FIGURE 7
MODEL 20 - 90
17
16
1
2
3
4
5
6
25
19
27
7
8
12
11
22
24
26
15
13
10
14
TABLE 4 - STANDARD MATERIALS
Item
Qty.
Name
1
1
Upper housing
2
1
Limit block
3•
1
Bolt
4
1
Diaphragm plate
5•
1
Diaphragm
6
1
Spring plate
7•
3
Spring inside
8•
3
Spring outside
10
1
Stem
11
1
Stroke limiter
12
1
Lower housing
13•
1
Bushing
14*
3
Yoke pillar
15
1
Yoke plate actuator
NOTES
- Dimensions may be subject to change without prior notification.
- Yarway will provide a certified dimensional drawing upon request.
- Bolts nr. 19 are used for disassembly of actuator and provided with protection tube.
* Zinc plated parts
+ Optional
• Recommended spares
•
•
•
•
•
•
•
•
•
•
•
•
•
28
Material
Dimension
C-steel
C-steel
12.9
M14 x 100 mm
C-steel
Rubber
Aluminium
A182 F316
A106 Gr. B / ST.35.8
C-steel
Brass / GGGN60+
C-steel
A105 / C22.8
ø 420
ø 360
•
•
•
•
•
•
•
•
•
•
Item
Qty.
Name
16
1
½" NPT socket
17
1
Hoisting lug
18*
16
Bolt
19*•
4
Stud
20*
16
Nut
21*
8
Washer
22
1
Cushioning plate
23
1
Support plate
24
2
Connector air snubber
25*
1
Washer
26
2
Air snubber
27*
4
Nut 3D
28
3
Bolt
18
•
•
21
•
20
23
Material
A105 / C22.8
C-steel
8.8
8.8
Steel
8.8
Rubber
Aluminium
St. steel
8.8
Brass
8.8
8.8
Dimension
M8 x 30 mm
M8 x 200 mm
M8
M8
M14
M8
M12 x 40
6
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