The Influence Of Chemical And oil resistance V-Belt

The Chemical And oil resistance V-Belt in contact witha belt drive system can materially influence the life span and operational characteristics of the system.

The Chemical And oil resistance V-Belt in contact witha belt drive system can materially influence the life span and operational characteristics of the system. The concentration of the chemical or the oil involved, length and type of exposure,choice of the belt type used, and environmental conditions such as heat and humidity, allcontribute to the rate and degree of impact onthe performance and deterioration.Two effects may be noted when belts areexposed to oil and/or chemicals.

The mostobvious is a swelling or increase in dimensionsof the cross section so that they no longer fit thesheave or pulley groove properly. Less apparentat casual observation, is the deterioration ofthe original physical properties, which includesadhesion between the belt components. Ifthe degree of swelling and/or loss of physicalproperties is significant, the life of the belt willbe substantially shortened.The above effects may be brought about by alarge variety of chemicals, notably oils, acidsand solvents.No singular synthetic rubber is resistant to all ofthese. Some rubber compounds react favorablyto one chemical, but poor with another, and onlyadequately with still another.The nature of the compounds and/or beltconstruction may minimize swelling anddeterioration. Occasional oil or grease splatterdoes not usually adversely affect standard belts.In addition, there are many substances, suchas gasoline, which swell rubber or extractingredients from the belt rubber compounds.

These may cause the belt to become brittle,crack or swell, which results in deterioration ofperformance.Identifying the numerous materials that maydeteriorate belts would be impractical andrequires chemistry-specific knowledge of each material. Proprietary formulations used bypetroleum and chemical manufacturers wouldfurther complicate this effort. Ultimately, acareful laboratory study would be required totest the impact of specific materials on belt performance and deterioration.Belt compounds also vary from manufacturer tomanufacturer. Usually, those which are specifiedas oil resistant will withstand moderate attackfrom most commonly used oils and solvents. Ifthe drive is subjected to an accumulation of aconsiderable amount of oil and grease on the belt, it may preclude the use of a v-belt or av-ribbed belt.high temperature resistance V-Belts, synchronous belts are notsubstantially affected by the loss of frictioncoefficient and are capable of operation underthese conditions.Depending on the drive andthe nature of the oil, it may be possible to usea synchronous belt submerged in oil.

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