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.

To ensure satisfactory valve operation, a routine maintenance check should be performed at regular intervals. The following actions should be taken: , 1. Operate the valve through a

Maintenance Manual of Bolted Bonnet Gate, Globe & Check Valves . 2 Operation Swing Check Valves automatically open by the velocity of medium and close by the gravitational force when the flow reverse or stops. Typical exploded view of Swing Check Valve is shown in Fig.3 & Fig.4. For actual construction details

manual provides information for inspection and repairs of your DFT check valves should the need arise. No special tools are needed. Check Valve Assistance.

This section covers necessary maintenance instructions for the manually operated stop check valves, including routine maintenance, trouble shooting, disassembly, inspection, reassembly and recommended spare parts.

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

This manual contains maintenance instructions together with pertinent illustrations for servicing corrosion resistant steel alloy, manually operated gate, globe, and swing check valves.

Installation,Operation and Maintenance Manual. Swing Check Valve. 0. Serial No. H-V013-E-14. Swing Check Valve. Contents. (1) Be sure to read the following 

LIFT CHECK & SWING CHECK VALVE. OPERATION/ MAINTENANCE MANUAL 2.1 These check valves can be installed in a pipeline to avoid backward flow. 2.2 MEDIUM.

16/04/  · perform liquid penetrant testing (LPT) of the existing seating surface, machine-remove the existing alloy 21 hardfacing, perform LPT of the base metal (valve body) perform base metal repairs if needed, install new alloy 21 hardfacing, machine a new seating surface to OEM specifications, perform liquid penetrant testing of the new seating surface,

Swing Check valve is self-operation non-return valve. Disc opens in the direction of flow and returns back on body seat when flow stops and seals with seat ring against back-pressure. Disc is secured in hinge; bracket & pin arrangement, which is self aligned type and moves inside body cavity. In larger sizes, hinge pin projects out of body to ac