1. Installation location, height, import and export direction must conform to the design requirements, the connection should be firmly and tightly.
2. All kinds of manual valves installed on the insulation pipe shall not be downwards.
3. The valve must be inspected before installation. For the work pressure is greater than 1.0 MPa and in the main pipe to cut off the role of the valve, the installation should be carried out before the strength and tightness test, qualified after the use. Strength test, the test pressure is 1.5 times times the nominal pressure, the duration is not less than 5min, valve shell, filler should be no leakage for qualified.
The valve stem axis of the globe valve is perpendicular to the seating seal surface. The valve stem opens or closes the travel relatively short, and has the very reliable cut movement, causes this kind of valve to be suitable as the medium the cut-off or the adjustment and the throttling use.
Once the disc of the globe valve is in the open condition, the valve seat and disc sealing surface is no longer contact, and has a very reliable cutting action, the valve is very suitable as a medium for cutting or regulating and throttling use.
Once the globe valve is open, there is no contact between the valve seat and the disc seal surface. Thus its sealing surface mechanical wear is small, because most of the stop valve seat and disc easier to repair or replace the sealing components without the entire valve removed from the pipeline, this is the valve and the pipeline welding into one of the occasions is very suitable. The flow direction of the medium through such valves has changed, so the flow resistance of the cut-off valve is higher than that of other valves.