A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of

Carefully unpack the valve and check for identification plates or tags etc. It is recommended to install Gate and Globe valves with stem vertical up in longitudinal pipe lines. For other orientations of stem, refer to L&T valves. The performance of the valve will be better if the flow is smooth.

MAINTENANCE MANUAL. Drawing C-1239 Figures 221-D, 221-DS, 221-U and 221-US. Single-Increasing Lever & Weight Swing Check Valves.

This manual has been prepared to assist you with the installation, operation and maintenance of the valve to the maximum efficiency. For ease of reference, it 

UNITED 7700 Swing Check Valves may be installed in horizontal pipe-work and vertical pipe-work if the flow is in an upwards direction.

2.4 The valve after the long term storage, should be cleaned and tested prior to installation make. Page 3. WEIDOULI VALVES CO.,LTD. Check Valves Manual. NO.20, 

5.4 MAINTENANCE 5.4.1 The installed valve shall be checked, maintained and repaired regularly as follows:- a. Inspect for wear and tear of the sealing surface. If there is any damage, repair or replace it. c. Check if connected bolts are secure. shall be done once the valve is reassembled. Keep detailed records for reference. 6.

CAST IRON GATE, GLOBE AND CHECK VALVE. INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS. INSTALLATION. 1). Thoroughly clean and prepare the piping 

OPERATION AND MAINTENANCE MANUAL. TECHNO CHECK VALVES All Techno check valve assemblies are treated with a locking solution during assembly and no loose.

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This manual has been prepared to provide the end user with general guidelines in the installation, operation and routine maintenance of VITAS valves. The instructions contained within this manual apply to all VITAS bolted bonnet & pressure seal valves unless otherwise stated.