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INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
Figures 251-D & 251-U Single-Increasing
Figures 252-D & 252-U Double 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
Warranty ....................................... 3
Parts List ...................................... 4
Assembly Drawing/Parts Location
.... 4
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 251-252-IOM-022720 Rev A 10-5-20
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Related Manuals for Vag GA INDUSTRIES Figures 251-D
Summary of Contents for Vag GA INDUSTRIES Figures 251-D
- Page 1 Disassembly ..………………………… 2 Assembly ..……………………………. 3 Warranty ………………………………… 3 Parts List ……………………………….. 4 Assembly Drawing/Parts Location ..4 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 251-252-IOM-022720 Rev A 10-5-20...
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Page 2: Description Of Operation
INSTALLATION, OPERATION and MAINTENANCE Figures 251-D & 251-U Single Increasing Figures 252-D & 252-U Double-Increasing Air-Cushioned Lever & Weight Swing Check INTRODUCTION This manual will provide the information to properly Consult the drawings of record to verify the install, operate and maintain the valve to ensure a configuration supplied and installed. -
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
WARRANTY: disassembly sequence with consideration of the following: The VAG USA, LLC Warranty can be found at: https://www.vag-group.com/us-en/terms-and- 1a. Clean and polish all machined bearing and conditions-for-vag-usa-llc sealing surfaces. Apply a light coat of lubricant to assist in the assembly. - 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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