butt welded self sealing globe valve

High-pressure globe valve side of the headstock were valve-shaped, flat or conical sealing surface, along the fluid valve for linear motion of the center line. Stem form of the movement, there are leveraged take-off and landing (landing and taking off stem, handwheel does not take-off and landing) as well as rotating movements leveraged (with hand wheel and stem rotation movements, the nut in the body). Cut-off valve is only applicable to full-and full clearance, are not allowed to make adjustments and cut expenditure.

High-pressure globe valve sealed valves are mandatory, so the closure of the valve, it is important to put pressure on the valve to force the sealing surface does not leak. When the medium from the bottom valve into the valve, the operating force required to overcome the resistance, is the friction between stem and packing power and media pressure by the thrust generated by closing the valve to open the valve than force, Therefore, larger diameter stem, or stem will turn the top of the fault. In recent years, from the emergence of self-sealing valve, the flow medium valve by valve on top to enter the valve chamber, when under pressure in the medium, the power valve clearance small, and the power to open the valve, stem diameter can be reduced.