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Teflon (PTFE) oil seal
PTFE oil seal
1, rubber oil seal with pressure spring tip lip mouth, contact with a shaft wide only 0.3 - 0.5 mm, PTFE oil seal with no spring in the lip width power structure, for a contact with a shaft width 5 - 7 mm, so you can maintain an adequate oil film and the eccentric shaft insensitive to in the radial jump and move 0.4mm conditions can still work normally. In in in in in in in 2, PTFE oil seal wall engraved with axle steering instead of the thread groove. When the axial rotation will produce a thrust inwards to prevent fluid outflow. The thrust is very high, which leads to pressure of 3Mpa and sealed 1.0MPa (Dan Chun) (lips) fluid, rubber oil seal is only 0.03mpa ribution 3, PTFE oil seal excellent anti friction, especially in non oil or oil less working state, even long downtime enabled again, also can immediately crowned with low friction properties, rubber oil seal is only suitable for oil.
In 4, PTFE oil seal is especially suitable for high-speed rotation application, line speed up to 30m/s, NBR rubber seal of the line speed of 10m/s.
5. The highest temperature of PTFE oil seal is 350, and the highest temperature of fluorine rubber oil seal is 280.
6, PTFE oil seal can seal water, acid, alkali, solvent, gas, etc., rubber oil seal can seal oil, grease.
Five: application products: air compressor, engine, heat pump, vacuum pump, chemical pumps pumps, reducer, bearing, mixer, blower, machine tools, gear box, crankshaft, hydraulic motor, chemical treatment equipment and all kinds of professional equipment, especially in traditional rubber oil seal can not meet the application. Under normal circumstances PTFE oil seal service life is 20 times the ordinary oil seal.
Specializing in the production of single lips, lips and three PTFE oil seal manufacturers. Professional PTFE lip and stainless steel frame, is a strong guarantee for product quality. Products are mainly used in high precision, high friction, high pressure, high temperature and strong corrosion and other rubber oil seal can not be competent for the harsh environment, is one of the high quality of seal products. The company production of PTFE oil seal lip mouth part of the selection of the material is filled with modified PTFE (mainly filling ingredients: glass fiber, carbon fiber, graphite, MoS2), greatly improving the wear resistance of PTFE; skeleton is made of stainless steel. At the same time, in the structure of the product we are imitation of Germany's imports of similar products to deal with, to ensure that the product of the mass and the former. In the same industry, the quality of our products is absolutely first-class, the price is reasonable.
1 PTFE oil seal characteristics
PTFE oil seal casing made of low carbon steel made (can be wrapped in rubber); oil seal lip mouth used with memory contraction ability of PTFE are pressed into a trumpet shaped, shaft to spin frictional heat can make lip shrinking, tightly on the shaft, and can compensate for wear; poly PTFE oil seal wall engraved with axle steering instead of the thread groove, and wide contact surfaces and the surface of the shaft. Oil seal can be sealed with a maximum of 3.5 MPa pressure, and the rubber seal is only 0.03 MPa.
PTFE oil seal and rubber oil seal, also has the following advantages: PTFE oil seal with no spring in the width of the lip structure and contact with a shaft width is 5 to 7 mm, so you can keep a layer of oil film, and the eccentric shaft is not sensitive in radial runout of 0.4 mm conditions can still work normally; and rubber oil seal with a spring-loaded aculabialis, contact the shaft width only 0.3 ~ 0.5 mm.
PTFE oil seal has excellent anti friction, especially suitable for high-speed rotation, no oil or without oil working state, even if long downtime enabled, also can immediately have a low friction characteristics; the shaft with the highest speed of 30 m / s, the highest working pressure temperature at 100 to 350 DEG C, friction coefficient is only 1 / 40 of the rubber oil seal.
In addition, PTFE seal size tolerance standards and rubber skeleton oil seal is completely consistent, strong.

2 application examples
PT160 crawler bulldozer fitted for NT855-C280 type type engine, the engine crankshaft using PTFE oil seal to replace the traditional rubber oil seal, solving the due to the oil spill need regular replacement of oil seal. Replacement of the engine crankshaft, the oil seal is relatively simple, but must be carefully selected, according to the requirements of careful operation, to avoid rework.
(1) the purchase of oil seal
To buy PTFE oil seal, to carefully observe the oil seal product and anti false flag. In addition, USA DuPont Co production of Teflon PTFE oil seal card with a nylon guide sleeve for installation.
(2) installation requirements
PTFE oil seal installation, must will be installed parts of the rust stains, dirt, burrs and other clean; to protect the sealing surface is not damaged, do not use rough, with a sharp tool assembly; assembly must maintain the crankshaft oil seal and clean, dry, prohibit the use of grease lubrication (oil) lubricating oil seal lip and shaft neck, otherwise after installation will produce leakage.
(3) installation method
Installation of the DuPont Co of the original plant of PTFE oil seal using its equipped with a nylon guide sleeve; the installation of non original factory of PTFE oil seal must be used in order to avoid damage to oil seal. Crankshaft seal installation tool as shown in Figure 1, consists of the first seal guide, seal guide and seal plate.
Front crankshaft seal installation (see Figure 2) steps are as follows: clean, dry seal installation position; front oil seal with the pressure plate gently into the gear box oil seal seat; guide pin insertion screw holes on the front end of the crankshaft; the crankshaft gear box is aligned with the gear chamber, with copper hammer will seal along the curved shaft neck gently tap into, take the lower guide.
Crankshaft seal installation steps are as follows: clean, dry seal installation position; the guide pin is inserted into the hole of the crankshaft flywheel end in; toward the mouth of the oil seal lip aligned within the crankshaft journal, using pressure plate to resist, to beat on the pressure plate with copper hammer, the oil seal gently into, take the lower guide.