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INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
Figures 251-D, 251-DS, 251-U and 251-US
Drawing C- 1066 Single-Increasing
Air-Cushioned Lever & Weight
Swing Check Valves
TABLE OF CONTENTS
Introduction .................................. 1
Description of Operation
................. 1
Receiving & Storage ....................... 1
Installation ..................................... 1
Valve Construction ......................... 2
Start-Up ........................................ 2
Preventive Maintenance .................. 2
Trouble Shooting ........................... 2
Disassembly .................................. 2
Assembly ...................................... 3
Parts List ...................................... 4
Assembly Drawing/Parts Location
.... 4
Warranty ....................................... 5
9025 Marshall Road • Cranberry Township, PA 16066 USA
Telephone (724) 776-1020 • Fax (724) 776-1254
E-mail:
info-ga@vag-group.com
Manual Number 251-IOM-0818R0
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Summary of Contents for Vag 251-DS
- Page 1 INSTALLATION, OPERATION AND MAINTENANCE MANUAL Figures 251-D, 251-DS, 251-U and 251-US Drawing C- 1066 Single-Increasing Air-Cushioned Lever & Weight Swing Check Valves TABLE OF CONTENTS Introduction ….………………………… 1 Description of Operation ..………… 1 Receiving & Storage ..……………… 1 Installation ..…………………………. 1 Valve Construction ..……………….
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Page 2: Description Of Operation
INSTALLATION, OPERATION and MAINTENANCE Figures 251-D, 251-DS, 251-U, 251-US Single-Increasing Air-Cushioned Lever & Weight Swing Check INTRODUCTION Consult the drawings of record to verify the This manual will provide the information to properly configuration supplied and installed. install, operate and maintain the valve to ensure a long service life. -
Page 3: Valve Construction
VALVE CONSTRUCTION TROUBLESHOOTING • The standard Figure 251 and 252 Swing Check Shaft packing leakage Valves have a cast iron body, bronze or stainless Tighten packing gland nuts equally just steel (indicated by Figure Number suffixed with “S”) enough to stop leakage, no more than ½ turn body seat, stainless steel hinge shaft and cast iron at a time. -
Page 4: Replacement Parts
Genuine replacement parts are available from your no longer “bite” into the body. This is best local VAG/GA Industries representative or from the accomplished by compressing the seat pins factory: (2B) using “vice-grips” and pulling the pins in... - Page 5 Part No. Part Name Std. Material Part No. Part Name Std. Material Body Cast Iron Disc Arm Key Stainless Steel Body Seat Bronze or SS Cushion Chamber Cast Iron** Seat O-Ring Buna-N Cushion Chamber Liner Bronze** Seat Pins Stainless Steel Plunger Brass/Bronze Disc with Center Pin...
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