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INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
Figures 991-D and 991-U
Drawing EAV-7080, 3" to 20"
Wastewater Vacuum Breaking Valves
Introduction .................................. 1
Description of Operation
Receiving & Storage ....................... 1
Installation ..................................... 1
Valve Construction ......................... 1
Start-Up ........................................ 2
Preventive Maintenance .................. 2
Trouble Shooting ........................... 2
Disassembly .................................. 2
Assembly ...................................... 2
Replacement Parts List...................... 3
Warranty ....................................... 3
Assembly Drawing/Parts Location ........ 4
234 Clay Avenue • Mars, PA 16046 USA
Telephone (724) 776-1020 • Fax (724) 776-1254
E-mail:
TABLE OF CONTENTS
................. 1
info-ga@vag-group.com
Manual Number 220-IOM-022321
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Summary of Contents for Vag 991-D
- Page 1 INSTALLATION, OPERATION AND MAINTENANCE MANUAL Figures 991-D and 991-U Drawing EAV-7080, 3” to 20” Wastewater Vacuum Breaking Valves TABLE OF CONTENTS Introduction ….………………………… 1 Description of Operation ..………… 1 Receiving & Storage ..……………… 1 Installation ..…………………………. 1 Valve Construction ..………………. 1 Start-Up ...……………………………….
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Page 2: Description Of Operation
Refer to the List of Materials submitted for the order if INSTALLATION non-standard materials were provided. Figure Numbers suffixed with “D” (e.g., 991-D) indicate the valve has an ANSI Class 125 flanged Refer to Page 4 for details of construction and parts pipeline connection, Figure Numbers suffixed with “U”... -
Page 3: Preventive Maintenance
START-UP It is not necessary to disassemble the entire valve to The valve generally does not require any calibration replace the shaft packing, follow steps 1 to 3 and 5a. or adjustment prior to start-up. The counterweight(s) should be initially placed at the far end of the arm and Ensure there is no pressure within the valve secured by tightening the set screw (31A). -
Page 4: Repair Kits
REPLACEMENT PARTS WARRANTY: Genuine replacement parts are available from your The Warranty for GA Industries valves is local VAG/GA Industries representative or from the included in our Terms and Conditions which can factory: be found here: https://gaindustries.com/terms... - Page 5 Part No. Part Name Std. Material Part No. Part Name Std. Material Body Cast Iron Gland Cast Iron Body Seat Bronze or SS Gland Stud & Nut Steel Seat O-Ring Buna-N Packing Teflon Seat Pins Stainless Steel Shaft Lock Pin Brass Disc with Center Pin Cast Iron/Steel...