Vag GA INDUSTRIES Figures 251-D, Installation, Operation And Maintenance Manual, Page: 1 / 6

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