INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
Figures 250-D, 250-U, 250-DS and 250-US
Drawing C-1018, 2½
” to 20”
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
Replacement Parts
…………………….. 4
Warranty
………………………………… 4
Parts List
………………………………… 4
Assembly Drawing/Parts Location .... 5
234 Clay Avenue
• Mars, PA 16046 USA
Telephone (724) 776-1020
• Fax (724) 776-1254
Manual Number 250-IOM-022321
