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Pinch valves
information
Pinch valve design
for suited to
industrial and municipal services where abrasive,
corrosive, plugging prone slurry, sludge,
liquid or bulk solids are processed.
Pinch
valve is cost-effective alternative to metal
alloy, lined, or coated ball, plug, gate, and
diaphragm valves that do not offer comparable
mechanical advantage, chemical resistance, effective
shut-off, or 100% full flow.
Pinch valve has semi-open split body design for
easy maintenance, performance, quality and service
capabilities.
Pinch valve elastomer tube (also referred to as
sleeve, hose, muff) is the recurring cost effected to
pinch valve purchase price.
Problems with pinch valves arise due to elastomer
failure as the rubber sleeve is stretched and stressed
during closure. This often results in the cutting of
the sleeve around the pinch area, or incomplete
closure (throttling) resulting in high velocity wear
and shortened sleeve life. To overcome major issue of
pinch valve sleeve failure, specialized
elastomer sleeve with good reinforcement is required
for negative pressure, vacuum conditions and good life
of rubber sleeves. Other improvements include
redesigned elastomer sleeve with reinforcement that
ensure higher cycles and extended sleeve life.
Pinch valve sleeves
are resistance to abrasion, chemicals, temperature,
pressure have expanded the applications.
Pinch valve - usage has increased since the
availability of valves with options of Gear operated,
Chain wheel operated,
Pneumatic operated On/Off and pneumatic throttling
control.
Initial purchase price of pinch valve
is just one portion of the total ownership cost. As
erosive and corrosive media wear the rubber
sleeve / liner / muff / tube, which is the only
replaceable part of pinch valves, making pinch valve
most economic. Elastomer quality, price, and frequency of
sleeve replacement are a major component of life-cycle
costing, as are direct and indirect costs of valve
removal and reinstallation of pinch valves. Accordingly, paying a bit more for quality
at the outset can often be recouped in less than a
year by simply avoiding the cost of one maintenance
incident. For details on Pinch valve sleeves -
http://www.woodlandengineers.com/Rubber_Sleeve.html
Pinch valve-
a comparison of features
among major manufacturers facilitates the decision
making process.
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