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Rod-Piston seal K21 12x16x3 NBR

CodeK21-012/16 NBR
In stock25pcs
Priceexcl. VATFrom PLN 6.04/pcs
Rod-Piston seal K21 12x16x3 NBR—
PLN 6.04excl. VAT

Price by quantityexcl. VAT

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Technical data

Properties
Seal typeK21
Material typeNBR
BrandKastas
Weight1g
Hydraulic seals dimension
Rod diameter d12mm
Groove Diameter D16mm
Seal width h3mm

Documents

Description

K21, RPS - single-acting symmetrical hydraulic seals. The presence of the same size and shape of the sealing lips allows the use of these seals to seal both the Rod and the Piston. They are made of the following materials: PU (polyurethane) and NBR (nitrile rubber). You will find the basic requirements and operating conditions of the cuff in the description for each type and size. Use the FILTER of diameters for selection of the necessary size. ADVANTAGES: Wide range of sizes Easy installation in closed grooves Simple groove design Cost-effective repair seal

Material

NBR (nitrile butadiene rubber)

  • Operating temperature-30 °C to +100 °C

Good with oils, fuels, water and compressed air. Not for brake fluid, solvents, strong acids or sunlight.

Chemical resistance
Can be usedDo not use
Mineral oil, grease and hydraulic oil (H, H-L, H-LP)Brake fluid (DOT 3, DOT 4, DOT 5.1): the ring swells quickly
Diesel, fuel oil, keroseneSunlight and open air (ozone): the rubber cracks
Petrol (gasoline), propane, butaneAcetone, MEK, ethyl acetate and similar solvents
Water and water-based liquids, up to +80 °CBenzene, toluene, trichloroethylene (aromatic and chlorinated solvents)
Compressed air, also with oil mistSynthetic ester oils and fire-resistant fluid HFD-R
Water-based fire-resistant hydraulic fluids (HFA, HFB, HFC)Strong (concentrated) acids, e.g. nitric and sulfuric, and strong oxidizers
Oil-and-water emulsionsSteam and hot water above +100 °C
Weak acids, alkalis and salt solutions, at room temperature
Use with cautionPetrol with a lot of bioethanol (E10, E85): better use FKM (Viton)

Shows low compression set within the recommended temperature range.

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