News - Shut-off valve

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Xiamen Freede Industry Co., Ltd.
Contact Person: Carlos Hu
Tel: 86-592-5237455
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Email: freede@sino-freede.com
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http://www.freedevalve.com

Home > News > Shut-off valve

Shut-off valve - 2014-03-13 11:06:59

Closing the valve stem and valve seat sealing surface perpendicular to the axis of the valve . Stem to open or close the relatively short trip, and have very reliable cutting action , making this valve is suitable for medium off or adjust and throttling.

Once the cut-off valve contacts the valve in the open position between its valve seat and valve sealing surface is no longer , and has a very reliable cutting action , combine this valve is suitable for medium cut or regulation and section stream uses .

Once the valve is turned on , its valve seat and valve sealing surface is no longer in contact , so it's less mechanical wear of the sealing surface , due to the valve seat and most of the valve is relatively easy to repair or replace when the valve sealing element without the whole removed from the pipeline , which the valves and pipes welded into one occasion is very applicable . Medium flow direction through the valve when such a change , the flow resistance of the valve and therefore a higher closing the other valve.

Cutoff valve holding point

( 1 ) Cut-off valve gate structure than the simple manufacturing and maintenance are more convenient.

( 2 ) Sealing surface is not easy to wear and abrasion , good sealing, no relative sliding between the valve and the valve sealing surface when opening and closing, and thus wear and abrasion are not serious , good sealing performance , long service life.

( 3 ) When opening and closing , the valve stroke is small , and thus the height of cut-off valve is smaller than the gate , but the structure is longer than the length of the gate .

( 4 ) Opening and closing torque, compared with effortless opening and closing , opening and closing time president.

( 5 ) Fluid resistance, due to the media channel over the twists and turns the valve body , fluid resistance , the power consumption .

( 6 ) Medium flow direction Nominal PN ≤ 16MPa, commonly used downstream, upstream from the media under the direction of the valve ; nominal pressure PN ≥ 20MPa , generally countercurrent , media direction downstream from the valve . To increase the seal performance. In use, the shut-off valve the medium flow in one direction only , can not change the flow direction.

( 7 ) When fully open valve are often subject to erosion .

Keywords:butterfly valve ,knife gate valve,ball valve,globe valve,slurry gate valve

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