Rubber ball

Where do the rubber ball use normally ?

 

Rubber ball is one of the special equipment used with vibrating screen, so it can also be called vibrating screen rubber ball, rubber elastic ball and rubber bouncing ball.

 

The reason why it can be called bouncing ball is that the rubber ball itself has good elastic performance, which can make cyclic jumping in the middle of the vibrating screen and constantly hit the mesh of the screen. The vibration force generated can shake the materials attached to the net down.

 

The main function of rubber ball is to clean the materials adhered to the screen and screen holes, improve the screening efficiency of materials, avoid material waste and mesh blockage, and improve the output of products.

 

At present, the rubber ball of vibrating screen has a good cleaning effect for viscous materials in industries such as food, medicine, mining, metallurgy and so on, so it is widely used. However, attention should also be paid to the density and proportion of rubber balls on each screening equipment during use. If the number of rubber balls is too large, it may not only cause the loss of screening equipment, but also pollute materials.

 

Rubber ball also belongs to a mechanical seal. The hardness is generally 50-90 degrees. The material is usually  NBR rubber and FKM / FPM rubber, also could be silicone rubber etc.

 

 

MATERIAL PROPERTY 

 

                                              E - Excellent          G - Good          F - Fair          P - Poor 

Property

NBR

EPDM

CR

Silicone

FKM

NR

SBR

PU

HNBR

FVMQ

IIR

Aflas

Abrasion Resistance

G

G

G

P

G

E

E

E

G

P

G

G

Acid Resistance

F

G

F

F

E

F

F

P

E

F

G

E

Chemical Resistance

F

E

F

G

E

F

F

F

G

E

E

E

Cold Resistance

G

G

F

E

P

G

G

G

G

G

G

P

Compression Set Resistance

G

G

F

G

E

G

G

F

G

G

F

G

Dynamic Properties

G

G

F

P

G

E

E

E

G

P

F

G

Electrical Properties

F

G

F

E

F

G

G

F

F

E

G

E

Elongation

G

G

G

F

F

F

F

F

G

F

G

F

Flame Resistance

P

P

G

F

E

P

P

P

P

G

P

E

Heat Resistance

G

G

G

E

E

F

F

F

E

E

G

E

Impermeability

G

G

G

P

G

F

F

G

G

P

E

G

Oil Resistance

E

P

F

F

E

P

P

G

E

G

P

E

Ozone Resistance

P

E

G

E

E

P

P

E

G

E

G

E

Tear Resistance

F

G

F

P

F

G

G

G

F

P

G

P

Tensile Strength

G

G

G

P

G

E

E

E

E

F

G

G

Water Resistance

G

E

F

G

F

G

G

P

E

F

G

G

Weather Resistance

F

E

E

E

E

F

F

E

G

E

G

E

 

 

Topseals's fluorocarbon (FKM, FPM) O-rings are compatible with oils and gases, hydraulic oil and fuels.

 

Topseals's hydrogenated nitrile (HNBR, HSN) O-rings are very compatible with oils and gases. 

 

Topseals's ethylene propylene rubber (EPM, EPR, EPDM) O-rings are compatible with solvents and other chemicals.   

 

Topseals's silicone (VMQ) O-rings are very compatible with PFPE, cold water, and ozone.

 

Topseals's polychloroprene rubber (CR) O-rings are compatible with oils and gases.

 

Topseals's perfluoroelastomer ( FFKM) O-rings are very compatible with hydraulic oil and fuels.                             

Topseals's nitrile rubber (NBR) O-rings are very compatible with oils and gases. 

 

Topseals's fluorosilicone (FVMQ) O-rings are very compatible with oils and gases.

 

 

MAIN MATERAIL FEATURES

 

FFKM perfluoroelastomer compounds are has excellent high temperature resistance and chemical resistance as PTFE, but also retains the relevant properties of rubber elastomer. It can be used continuously at 260 ° C to 300 ° C and at a high temperature of 325 ° C in a short time. Such excellent performance makes it widely used in military industry, aerospace, semiconductor, medicine, electronics, chemical industry and other fields.

 

FKM compounds are widely used in chemical, automotive, aerospace and industrial applications, Fluoroelastomer (Viton®, FKM) offers a wide range of resistance to chemicals, oil and heat, with situational service life above 200°C, with Excellent mechanical properties. Good extrusion resistance. Chemical and heat resistant.

 

NBR offers relative low cost, good mechanical properties, and resistance to many common oils, fuels and lubricants. NBR has poor resistance to weathering, sunlight and ozone so it is best used in enclosed environments where parts are not exposed to the elements.

 

HNBR Hydrogenated versions of NBR (HNBR) have enhanced mechanical properties as well as greater thermal and chemical stability. Specific physical properties and chemical resistances vary by compound formulation.

 

Silicone are excellent seal materials for extreme temperature in static applications. Outstanding flex and fatigue life, very good for ozone and UV radiation, insulating properties, and physiologically neutral. silicones can be synthesized with a wide variety of properties and compositions.

 

PTFE with Best chemical compatibility, low friction, meets FDA, USDA and 3-A dairy requirements, excellent moisture resistant and good cryogenic capabilities down to -350° F. Could be applied in Seals, bushings, back-ups, guides, pads, plugs, rollers, spacers, o-rings, wear rings, washers.