Ensure the pipe is depressurized and drained.
Shut off upstream and downstream valves and drain the section of pipe where the gate valve will be installed.
Measure and mark the pipe.
Measure the distance between pipe ends and mark where you want to cut. The china gate valve should be installed in a section of straight pipe.
Cut the pipe.
Use a pipe cutter or saw to cut the pipe at your marks. deburr the cut edges and clean the pipe ends.
Install pipe end caps (optional).
For some applications, end caps are used to temporarily seal the open pipe ends. This prevents contaminants from entering the pipe during installation.
Apply thread sealant or pipe joint compound.
For threaded gate valves and pipes, apply an appropriate thread sealant to the threads. For flanged joints, apply the gasket and bolt the flanges together.
Install the gate valve.
For threaded valves, screw the valve onto one pipe end, then screw the other pipe end into the valve. For flanged valves, bolt the valve to the pipe flanges.
Test and open.
Once installed, test to check for any leaks. You can then slowly open the valve to open flow through the pipe.
Final checks.
Visually inspect to ensure the gate valve is operating properly and not leaking. Check that it is fully isolating flow when closed. Your gate valve is now installed and ready for service!
Some additional tips for installation:
Ensure the valve flow direction arrow points in the direction of flow.
For threaded valves, apply appropriate torque to the valve body based on the pipe size.
For flanged valves, tighten the flange bolts in a star or criss-cross pattern.
Consider valve accessibility and leave enough space for a valve handwheel or wrench to operate the valve.
Gate valves can be installed in horizontal or vertical pipe runs.