Watts AMES 979GD, Installation, Operation And Maintenance Manual, Page: 10 / 12

10 IOM-A-ACV-979_679 2115 EDP# 1917114 © 2021 Watts IOM-A-ACV-979_679 2115 EDP# 1917114 © 2021 Watts 11
Optional
Xylan
Coating
17A
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Item Description Material
1 Pipe Plug Lead Free Brass
2 Cover ASTM A536 65-45-12 Epoxy Coated Ductile Iron
3 Cover Bearing ASTM A276 304 Stainless Steel
4 Stud with Cover Nut and Washer ASTM A570 Gr.33 Zinc Plated Steel
5 Body ASTM A536 65-45-12 Epoxy Coated Ductile Iron
6 Spring ASTM A276 302 Stainless Steel
7 Stem Nut ASTM A276 304 Stainless Steel
8 Lock Washer ASTM A276 304 Stainless Steel
9 Stem Washer ASTM A276 304 Stainless Steel
10 Diaphragm Washer ASTM A536 65-45-12 Epoxy Coated Ductile Iron
11 Diaphragm* Buna-N (Nitrile)
12 Disc Retainer ASTM A536 65-45-12 Epoxy Coated Ductile Iron
13 Seat Disc* Buna-N (Nitrile)
14 Spacer Washer* x5 NY300 Fiber*
15 Disc Guide ASTM A743 CF8M (316) Stainless Steel
16 Shaft ASTM A276 304 Stainless Steel
17 Seat Ring** ASTM A743 CF8M (316) Stainless Steel
17A Seat Screw** (8" and Larger) ASTM A276 304 Stainless Steel
18 Seat Gasket* Buna-N (Nitrile)
* Contained in Main Valve Repair Kit
**Note: 6 inch and Smaller Valves, Seat Ring is threaded
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.
NOTICE
ACV Assembly Diagram – Series 979GD