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金洋2娱乐官网最新网址 General valve
The main types of valves are: gate valve, globe valve, check valve, ball valve, butterfly valve, plug valve, diaphragm valve, safety valve, drain valve, throttle valve, pressure reducing valve, regulating valve and special valve;
It is mainly used for installation in various pipeline systems, as a pipeline control accessory, to change the channel section to control fluid pressure, flow and direction, such as cutoff, regulation, check, diversion, safety, decompression, etc.
It can be applied to the working conditions of various parameters. At the same time, the gate valve also has the advantages of small flow resistance, less effort in opening and closing, unrestricted medium flow direction, and the upper sealing structure is conducive to the prosperity and protection of the packing.
Through the relative movement of the valve stem, it drives the closing piece (disc) to move in a direction perpendicular to the pipeline axis, so as to open and close the valve
It is used to cut off the medium in the pipeline.
Regardless of its specific structure, the basic sealing principles of gate valve can be divided into automatic sealing, unilateral forced sealing and two-way forced sealing
It is mainly divided into two categories, parallel gate valve and wedge gate valve.
Yes, the upper mounted valve stem nut keeps the valve in the open position. Even if the handwheel is removed, the valve stem and valve plate will not fall
Yes, the T-type head of the valve stem is integrally forged to ensure sufficient connection strength.
The closing element (disc) moves along the center line of the valve seat under the drive of external force, thus completing the opening and closing of the valve.
The sealing of the globe valve is mandatory. It relies on the axial force of the valve stem to act on the valve disc, generating enough force to make the sealing ratio reach the required specific pressure, so as to achieve sealing.
Simple and compact structure, good sealing performance and high pressure resistance; Small opening height and short opening and closing time; The sealing surface is not easy to wear and scratch; Long service life; The upper seal can protect the packing; However, it has large flow resistance, large opening and closing torque, small scope of application and small caliber.
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