Inside diameter minimum 16mm, wire diameter minimum 2.65mm, maximum
size no limit
Pumps and valves, reaction containers, mechanical seals, filters,
pressure vessels, heat exchangers, boilers, piping flanges, gas
1, drug resistance and strong universality, suitable for almost all
the chemical medium under normal temperature, the erosion of PTFE
only by few chemicals, the only listed chemical is not compatible
with the material, such as metal, fluorine and alkali halide is not
compatible with PTFE.
In contact with PTFE, some high concentrations of chemicals can
react with, at high temperature, PTFE will be 80% NaOH and KOH,
metal hydrides such as boric acid (B2 H6), aluminum chloride,
ammonia (NH3) and amino acids (NH2) and imino (R=NH) organic matter
erosion. At temperatures as high as 250 DEG C, it is also subject
to the chronic oxidation of 70% nitric acid.
If used in these extreme conditions, the product must undergo
special testing. In addition to the mentioned chemicals, RD30
usually exhibits chemical inertness to other chemicals.
2, the temperature range of -60 degrees Celsius, ~260 degrees
Celsius, can be used at a high temperature of 300 degrees Celsius
for a short time
3. Good compressive resistance. The presence of PTFE coating makes
RD31 have good hardenability and brittleness resistance. At the
same time, silicone rubber or fluorine rubber inner core makes RD31
maintain good elasticity at high temperature of 205 DEG C. The test
results show that the RD31 sealing ring formed by the combination
of the physical properties of silicone rubber or fluorine rubber
and the chemical properties of PTFE has good compressive resistance
as well as good rubber performance.
4, anti friction due to PTFE PTFE very low friction coefficient
(0.29), the varieties of O ring family force of friction to a
minimum, to reduce equipment wear, increase the power and
efficiency of the equipment is of great help and support.
5, the highest pressure resistant resistant to 35Mpa, more than 5
Mpa recommend the use of pressure ring type pressure ring.
6, excellent sealing durability, long service life, RD31 and any
other rubber or pure PTFE system O ring compared to, have an
incomparable sealing and long life, especially in harsh media.
7. Moderate hardness. The average hardness of RD31 rings with
different materials is:
Solid silicone rubber: 75-85
Solid fluorine rubber: 85-90
Hollow silicone rubber: 70-75
8, clean under normal temperature non-toxic, clean and high
temperature resistance to become food, medicine, fine chemical,
biological and industrial hygiene requirements in scientific
research and production of necessary production equipment