Pinch Valve Replacement Sleeves
Choice of sleeve material
For a successful selection of a pinch valve sleeve for
your specific application you should be able to select
the most
suitable
material from a variety of options for maximum compatibility
with the product to be handled. While the housing material
for each valve can be the same, the sleeve material and
construction will determine to a great extent how successful
the application will be.
Factors such as product temperature, pressure and chemical
properties may suggest a sleeve from the basic abrasion
resistant natural rubber while higher temperatures may
require different elastomers such as Viton® or Silicone.
Of course, when it comes to certain specific industries
pinch valve sleeves made from food grade elastomers may
be required and should be an option.
A cross section of elastomer materials normally available
for sleeves is shown in the table below:
| AKO Code No |
Material |
Possible Applications |
.01X |
Neoprene® |
resistant to dilute solvents, oils, acids, lubricants,
various hydrocarbons and mild chemicals; |
.02X |
Natural rubber(food grade) |
suitable for many weak chemicals, potable water,
wine, alcohols, |
.03X |
Natural gum rubber |
considerable abrasion resistance, suitable for waste
water, sand, mineral slurries, |
.03H |
Natural gum rubber |
similar to .03X for elevated temperatures |
.04 |
EPDM |
hot water, steam, dilute acids, alkalis |
.04LS and .04LW |
EPDM |
similar to .04 - used for food grade applications,
light or dark color; |
.05 |
Viton® |
resistant to solvents, oils, petrochemicals, aromatic
hydrocarbons, |
.06 |
Silicone |
good abrasion resistance, solvents, steam,, petrochemicals,
sulfuric acid; |
.07X |
Nitrile |
petrochemicals, inorganic acids and alkalis; |
.07LS and .07LW |
Nitrile |
similar to .07X - used for food grade applications,
light or dark color; |
.08X |
Hypalon® |
hot water, steam, oxidants, acids, bases, |
.09X |
Butyl |
inorganic acids and bases, hot water, steam, |
Neoprene®, Viton® and Hypalon® are registered
trademarks of E.I. Dupont Co.
|
