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Seals

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Seals

SEALS are used to create a barrier between a rotating and a stationary surface. They function to retain or separate lubricants or fluids, keep out contamination, and contain pressure. V-Ring seals are all rubber seals used primarily to exclude dirt and other contaminants. Wipers are also flexible lip exclusion seals. Hydraulic seals and pneumatic seals are designed for the reciprocating motion that is common in hydraulic and pneumatic applications, such as cylinders. Rod seals & Piston seals are radial seals. The seal is fit onto a shaft with the sealing lip contacting the housing bore. Double acting or bi-directional seals are effective when sealing in both directions.

Plastic pipes ( HDPE, CPVC, UPVE and PVC ) hold major part in plumbing sector due to lower cost, corrosion resistance, no painting required etc. Kesaria rubber in short span of time has become prominent & reliable manufacturer and supplier of rubber and rubber & plastic seals to pipe & fitting manufacturers. Size 75mm, 90mm, 110mm and 160mm are regular and consumption is high however other size are supplied as per industrial design and application followed by the customer. Rubber & PP seals are manufactured through injection moulding which offer durability, leakproof, finishing and resistant toward high water pressure.

Application and standard
Important dimensions to consider when specifying seals include shaft OD, ID, housing bore Diameter or seal Outer Diameter, axial cross section or Thickness, and radial cross section. Important service limits parameters to consider include maximum operating speed, maximum operating pressure, vacuum rating, operating temperature and any fluids with which they may come in contact. Rubber sealing element or lip material choices for seals include Aflas®, VITON, SILICON, EPDM, TPR, NBR, NEOPRENE, PU, SBR & NATURAL. The hardness rating on a Shore A scale for Seals can be 30 ~ 95 Durometer. Exact specifications should be clarified by our engineers, as chemical and physical properties of Seals can differ based on manufacturing technique.

Material Selection Guide

MATERIAL NR SBR NBR CR EPDM HNBR ACM CSM SILICONE FKM
(VITON)
HARDNESS RANGE ( SHORE A) 40-90 35-90 40-90 40-80 40-90 40-90 40-80 40-80 30-80 50-90
HIGH TEMP◦C 100 120 130 130 150 150 180 150 230 225
LOW TEMP◦C -50 -55 -45 -40 -50 -45 -25 -40 -60 -15
STEAM F F F P G G P E E E

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E= EXCELLENT;  G= GOOD;  F= Fair; P= Poor; A=Available, NA= Not Available

This guide is intended for general  reference Only. The materials listed are the most commonly used. There are numerous compound variations  designed  for  specific  applications  for  which  please  forward  details  to our  engineers  for  recommendation.

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