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YARWAY MODEL 20 PNEUMATIC DIAPHRAGM ACTUATOR
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
FIGURE 6
MODEL 20 - 55
16
•
21
25
23
22
24
TABLE 3 - 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•
5
Spring right
8•
5
Spring left
10
1
Stem
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
•
17
•
•
•
•
•
26
•
28
Material
C-steel
C-steel
12.9
C-steel
Rubber
Aluminium
A182 F316
C-steel
Brass / GGGN60+
C-steel
A105 / C22.8
ø 420
ø 360
5
•
•
•
•
•
•
•
•
Dimension
Item
Qty.
16
1
17
1
M14 x 100 mm
18*
16
19*•
4
20*
16
21*
4
22
1
23
1
24
2
25*
1
26
2
27*
4
28
3
•
•
•
•
•
•
7
•
19
Name
Material
½" NPT socket
A105 / C22.8
Hoisting lug
C-steel
Bolt
8.8
Bolt
8.8
Nut
Steel
Washer
C-steel
Cushioning plate
Rubber
Support plate
Aluminium
Connector air snubber
St. steel
Washer
C-steel
Air snubber
Brass
Nut 3D
8.8
Bolt
8.8
1
2
3
4
18
6
20
8
12
27
15
13
10
14
Dimension
M8 x 30 mm
M8 x 100 mm
M8
M14
M8
M12 x 40
5
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