gate valves advantages and disadvantages
GATE valve advantages:
(1) fluid resistance small because VALVE body internal medium channel is
the direct, medium flows when the valve without changing its flow
direction, so fluid resistance.
(2), open and close a moment when saving for gate open gate movement
direction perpendicular to the direction of flow and the media, and
globe valves, gate valves open more effort.
(3) medium flow direction is unlimited, no pressure, reduce turbulence
from the gate on both sides of the medium flows in any direction, all
can reach the purpose of using more suitable for medium. May change flow
direction in the pipeline.
(4) structure for the shorter length is vertical damper placed gate
valve, cut-off valve disc is placed within the body level and structure
length than globe valves.
(5) good seal performance by erosion when fully seal.
(6) wide open, sealing the erosion by working medium than globe valves are small.
(7), casting process is relatively simple, wide application scope.
GATE VALVES faults:
: (1) when the sealing disc and seat damage on-off contact between the
two sealing and have relatively friction, easy injury, influence and
longevity, seal maintenance is difficult.
(2) for a long time, the height of the great due to the gate open to
open or sexual, travel, open gate to certain space, with high dimension
space, installation required.
(3) complex structure gate generally has two sealing, processing,
grinding and maintenance, difficult to add some more parts, manufacture
and repair the more difficult than globe valves, cost is high.
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