Polytetrafluoroethylene (PTFE) is a form of thermoplastic resin that is resistant to
practically most of the corrosive services. It is one of the best materials for diaphragm
pump because of its chemical stability and resistance.
Polytetrafluoroethylene
(PTFE) is a durable and flexible elastomer of average tensile strength but
remarkable chemical resistance, as well as excellent thermally and electrically
resistive properties. At a molecular level, PTFE consists of a chain of carbon
atoms with two fluorine atoms bonded to each carbon. These fluorine atoms
surround the carbon chain, creating a dense molecule with very strong carbon-fluorine
bonds and a polymer structure that is inert to most chemicals.
PTFE
diaphragms have been one of the most thriving components that have lead to
a breakthrough in the pump industry. They have been widely produced and are
extremely successful in various industries across the globe. Following the pump
industry:
A peristaltic pump or hose
pump is a type of positive displacement pump used in various industrial
applications for pumping variety of fluids. The fluid is contained within a
flexible tube (i.e Hose) fitted inside the pump casing having no contact with
any other part of the industrial hose pump. A rotor having rollers attached to
the external circumference compresses the flexible tube in the peristaltic
pump. As the rotor revolves, compression motion forces the fluid to move
through the tube.
Applications or Uses of PTFE Diaphragm:
The PTFE the diaphragm has been widely accepted by all the consumers because of its
stability and resistance. However, the most common consumers of the diaphragm
are:
Neoprene:
An
excellent general purpose diaphragm for use in nonaggressive applications such
as water-based slurries, well water or sea water. Exhibits excellent flex life
and low cost.
Buna-N:
Excellent
for applications involving petroleum/oil-based fluids such as leaded gasoline,
fuel oils, hydraulic oils, kerosene, turpentine, and motor oils.
EPDM:
Excellent
for use in applications requiring extremely cold temperatures. It may also be
used as a low-cost alternative for pumping dilute acids or caustics.
Viton:
Excellent
for use in applications requiring extremely hot temperatures. Viton may also be
used in aggressive fluids such as aromatic or chlorinated hydrocarbons and
highly aggressive acids. PTFE would normally be used with these aggressive
fluids as its flex life are better than Viton; however, in applications
involving SUCTION LIFT (meter) outside the range of PTFE, Viton will be the the preferred choice for highly aggressive fluids.
PTFE:
Excellent
choice when pumping highly aggressive fluids such as aromatic or chlorinated
hydrocarbons, acids, caustics, ketones, and acetates.
Benefits of PTFE Diaphragm Over Other Materials Are:
·
Intense heat resistance
·
Intense chemical
resistance
·
Intense steam resistance
·
Lowest coefficient of
friction
·
Partially Flexible
·
Non-toxic
·
Odorless and tasteless
·
Can be sterilized
·
Steam-proof
·
FDA approved for food
applications
Antlia
specializes in PTFE lined Rubber Diaphragms (0.25mm, 0.5mm, 1.00mm
lining thickness) as well as Pure PTFE Rigid (up to 3mm thickness) Diaphragms
for all kind of pumps, like AODD Pump,
and Hose Pump and actuators
used in critical corrosive applications. The Rubber used with PTFE Linings are
Neoprene, EPDM, Butyl, and Hypalon.
Antlia PTFE
Lined Diaphragms are made from size ranging from 12mm to 600mm Diameter in
various shapes. The diaphragms have been tested up to 6kg/cm2 and operated up
to 1000 cycles. These diaphragms are not suitable for vacuum service and high
pressures.
We
are involved in the manufacturing of a comprehensive assortment of industrial
rubber components. These industrial rubber components find wide application in
several engineering and other heavy industries and are known for their features
of resilience and high tensile strength. We undertake the customization of
these industrial rubber components in accordance to their application or the
demands of our clients.
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