Diesel Engine Parts Stem Seal 3921640

Short Description:

Valve oil seal is a kind of oil seal, which is generally made of outer skeleton and fluororubber co-vulcanized. The diameter of the oil seal is equipped with a self-tightening spring or steel wire, which is used to seal the engine valve guide rod. The valve oil seal can prevent oil from entering the intake and exhaust pipes, causing oil loss, preventing the leakage of gasoline and air mixture and exhaust gas, and preventing engine oil from entering the combustion chamber. Valve oil seal is one of the important parts of the engine valve group. It is in contact with gasoline and oil at high temperature. Therefore, it needs to use materials with excellent heat resistance and oil resistance, generally made of fluorine rubber.

Product Detail

Product Tags


Rubber oil seal


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Stem oil seal

Rod seals are used in automotive engines to control the leakage rate of engine oil to lubricate valve stems and guides. In addition, the valve stem seal prevents oil from flowing into the exhaust and intake pipes, preventing oil from entering the combustion chamber


product name Rubber oil seal
size Standard size
Material rubber and steel
OEM 3921640
Serve Sales / After Sales
warranty period 1 year
Minimum order quantity 50PCS
Package Oupin packaging or neutral packaging can also be
customized packaging
delivery time 15-30DAYS
Shipping terms
payment terms T/T   D/P credit card
OEM&ODM: Custom-made samples are acceptable
material Low
NBR -40 120 Good resistance to alcohol,amines, petroleum oils, and
gasoline over a wide range of temperature. Also good resistance to caustic salts and fair acid. Poor in strong oxidants, chlorinated hydrocarbons, ketones, and esters
HNBR -25 140 HNBR is made from NBR by hydrogenation. It has high
temperature resistance, abrasion resistance and good
physical properties.
ACM -25 150 It is used in diaphragm, hose for automotive application.
Good resistance to heat, ozone and oil. Generally
attacked by water, alcohol, glycol and aromatic
hydrocarbons. The molecular structure contains ethyl acrylate (EA). Butyl acrylate (BA), and methoxy ethyl acrylate (MEA). High BA content get better low temperature resistance, and high MEA content get more oil resistance.
EPDM -40 125 Stable in polar fluids (alcohol, ketone, and glycol),
and hydrochloric acid. Due to the low specific gravity, it can compound with large amount filler.
VMQ -60 125 The most widely temperature ranges for application.
Good weather and ozone resistance, but poor mechanical property and chemical resistance.
FKM -20 250 Fluoroelastomers have a high degree of chemical
stability and are currently the best media resistance
of any elastomer. Type 26 fluoroelastomer resistant
to petroleum-based oils, diester oils, silicone ether
oils, silicic acid oils, inorganic acids, most organic, inorganic solvents, drugs and so on

Factory production line


Product Details

Valve seal
Valve seal

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