the advantages and disadvantages of stop valve -9游会

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the strength of the globe valve
a, compared with gate valve, globe valve structure is relatively simple, usually only one on the valve body and disc sealing surface, sealing area is small, save precious materials, low cost, thus making craft is good, easy to maintenance.
b, sealing surface wear and abrasion is lighter, sealing good.
there is no relative sliding between the closing time disc and the body sealing surface (except the conical sealing surface), thus the wear and abrasion are not serious, the sealing property is good and the service life is long.
c, the opening height is small, generally only 1/4 of the seat channel diameter, compact structure, save installation control.
disadvantages of the globe valve
a, the structure length is larger.
b, open and close torque, open and close effort.
when closed, because the disc movement is in the opposite direction of the medium pressure, it must overcome the force of the medium, so the opening torque is large.
c, flow resistance is large.
the medium passage in the valve body is more tortuous, the flow resistance is large, the power consumption is large, especially in the hydraulic device, the pressure loss is especially obvious.
the maximum flow resistance of the globe valve is in all kinds of truncated valves.
d. the flow direction of the medium is restricted.
when the medium flows through the globe valve, it can only flow from the bottom up or downward at the seat channel, so the medium can only flow in one direction and cannot change the direction of flow.
e. when the valve is closed, the solid particles in the fluid medium may be sandwiched between the cover.
f, the installation is inconvenient.