Technical Specifications

Model 37/38 Pneumatic Spring Diaphragm Actuator | 5
Materials of Construction
Ref.
No. Description Materials
15 Gasket (Packing Box) Copper
17 Yoke Cast Iron
18 Cap Screw Carbon Steel
19 Gasket Acrylic Fiber
20 Packing Nut Brass
21 Snap Ring Carbon Steel
22 Actuator Spring Spring Steel
22A Actuator Spring Spring Steel
26 Actuator Stem Stainless Steel
30 Hex Nut Carbon Steel
31 Packing Box Brass
32 Yoke Packing Braided PTFE
33 Spring Guide Carbon Steel
34 Spring Button Nickel Copper Alloy
36 Spring Adjuster Carbon Steel
39 Diaphragm
Elastomer w/Fabric
Insert
40 Diaphragm Plate Carbon Steel
41 Diaphragm Washer Carbon Steel
43 Diaphragm Case Carbon Steel
44 Diaphragm Case Carbon Steel
45 Cap Screw Carbon Steel
46 Hex Nut Carbon Steel
56 Travel Indicator Scale Aluminum
57 Machine Screw Stainless Steel
70 Ball & Retainer Stainless Steel
71 Spring Barrel Cast Iron
72 Spring Barrell Cap Cast Iron
73 Ball Bearing Race Steel
74 Cap Screw Carbon Steel
Reverse - Type 38Direct - Type 37
¨
Size 13, 15, 18 and 24 only.
Ref.
No. Description Materials
17 Yoke Cast Iron
18 Cap Screw Carbon Steel
22 Actuator Spring Spring Steel
26 Actuator Stem Steel
30 Hex Nut Carbon Steel
33 Spring Guide Carbon Steel
34 Spring Button Nickel Copper Alloy
35 Pipe Plug Plastic
36 Spring Adjuster Steel
37 Bushing Steel
39 Diaphragm
Elastomer w/Fabric
Insert
40 Diaphragm Plate Carbon Steel
41 Diaphragm Washer Carbon Steel
43 Diaphragm Case Carbon Steel
44 Diaphragm Case Carbon Steel
45 Cap Screw Carbon Steel
46 Hex Nut Carbon Steel
56 Travel Indicator Scale Aluminum
57 Machine Screw Stainless Steel
70 Ball & Retainer¨ Stainless Steel