Always follow standard safety procedures when working on a valve. Flush the pipeline before installing the valve. Debris allowed to remain in the pipeline (such as weld spatters, welding rods, bricks, tools, etc.) can damage the valve.After installation, cycle the valve a minimum of three times and re-torque bolts as required.
Always follow standard safety procedures when working on a valve.The valve should be welded onto the line with the wedge in the fully closed position. Leaving the valve even partially open can cause distortion and leaking.Verify the drawings to make sure that the valve has bi-directional sealing capability. If the valve only has unidirectional sealing capability, make sure it is installed into the pipeline in the correct orientation.Single direction sealing gate valves have a nameplate on the side of the valve that has a relief hole or pressure equalizer. This should be the high pressure side when the valve is closed.
Always follow standard safety procedures when working on a valve. Globe valves should usually be installed with the inlet below the valve seat. For severe throttling service, the valve may be installed so that the flow enters over the top of the seat and goes down through it. Note that in this arrangement, the packings will be constantly pressurized. If the valve is to be installed in near throttling service, verify with Flowjet Engineering. Globe valves per se are not suitable for throttling service.The valve should be welded onto the line with the disc in the fully closed position. Leaving it even partially open can cause distortion and leaking. Allow time for the weld to cool before operating the valve the first time in the pipeline.The preferred orientation of a globe valve is upright. The valve may be installed in other orientations, but any deviation from vertical is a compromise. Installation upside down is not recommended because it can cause dirt to accumulate in the bonnet
Ensure that the valve is in the open position and the inside of the body bore of the valve body/body end is coated with a suitable spatter guard. The post weld heat treatment must be localized. Make sure to keep intense heat away from the main portion of the valve (seats and ball). Do not cover valve in stress relieving blankets. The temperature of the main body section should not exceed the rated valve temperature.In certain applications, it may be necessary to remove all internal ‘soft’ material because of contractor heat treatment requests.
Third party automation
Flowjet Valves recommends detailed procedures when automating Flowjet Valves Ball valves in the field. Please consult Flowjet Valves for these procedures.