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ACV Assembly Diagram – Series 979GD-20
NOTICE
Installation: If unit is installed in any orientation other than
horizontal (cover up) OR extreme space constraints exist,
consult customer service prior to or at the time of order.
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Item
Description
1
Pipe Plug
2
Cover
3
Cover Bearing
4
Stud with Cover Nut and Washer
5
Body
6
Spring
7
Stem Nut
8
Lock Washer
9
Stem Washer
10
Diaphragm Washer
11
Diaphragm*
12
Disc Retainer
13
Seat Disc*
14
Spacer Washer* x5
15
Disc Guide
16
Shaft
17
Seat Ring**
17A
Seat Screw** (8" and Larger)
18
Seat Gasket*
**Note: 6 inch and Smaller Valves, Seat Ring is threaded
IOM-A-ACV-979-20_679-20 2115
Material
Lead Free Brass
ASTM A536 65-45-12 Epoxy Coated Ductile Iron
ASTM A276 304 Stainless Steel
ASTM A570 Gr.33 Zinc Plated Steel
ASTM A536 65-45-12 Epoxy Coated Ductile Iron
ASTM A276 302 Stainless Steel
ASTM A276 304 Stainless Steel
ASTM A276 304 Stainless Steel
ASTM A276 304 Stainless Steel
ASTM A536 65-45-12 Epoxy Coated Ductile Iron
Buna-N (Nitrile)
ASTM A536 65-45-12 Epoxy Coated Ductile Iron
Buna-N (Nitrile)
NY300 Fiber*
ASTM A743 CF8M (316) Stainless Steel
ASTM A276 304 Stainless Steel
ASTM A743 CF8M (316) Stainless Steel
ASTM A276 304 Stainless Steel
Buna-N (Nitrile)
* Contained in Main Valve Repair Kit
EDP# 1917116
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16
17
18
Optional
Xylan
Coating
17A
© 2021 Watts
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