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Rod seal K33 20x26x4,8

CodeK33-020/11 PU
In stock19pcs
Priceexcl. VATFrom PLN 10.51/pcs
Rod seal K33 20x26x4,8—
PLN 10.51excl. VAT

Price by quantityexcl. VAT

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Technical data

Properties
Seal typeK33
Material typePU
Material codePU9401
BrandKastas
Weight2g
Hydraulic seals dimension
Rod diameter d20mm
Groove Diameter D26mm
Seal width h4,8mm

Documents

Description

The K33 20x26x4,8 ring is a single-acting rod seal made of PU9401 polyurethane. This type of profile has a shorter inner lip, a longer outer lip and an additional sealing edge, which improves sealing and limits the ingress of contamination from the wiper side. Technical parameters: Inner diameter (d): 20 mm Outer diameter (D): 26 mm Height (H): 4,8 mm Size in inches: d x D x H = 20x26x4,8 mm ≈ 0.79”x1.02”x0.19” Material: Polyurethane (PU9401) Working pressure: up to 400 bar Travel speed: up to 0,5 m/s Seal type: single-acting, PU profile Application: construction machinery, forklifts, agricultural machinery, injection moulding machines, loading platforms, hydraulic cylinders

Material

PU / TPU / H-PU (polyurethane)

  • Standard PU / TPU-30 °C to +80 °C

Best for high pressure and abrasion, in mineral hydraulic oil. Standard PU must never meet hot water, steam or brake fluid, or run hotter than +90 °C.

Chemical resistance
Can be usedDo not use
Extreme pressure and pulsation (up to 40-50 MPa, very resistant to extrusion into the gap)Hot water and steam with standard PU: hydrolysis, it breaks down into powder
Abrasion, friction, cutting and tearing (4-5 times tougher than NBR)Glycol brake fluid (DOT 3, DOT 4, DOT 5.1): swells quickly
Mineral hydraulic oil (HL, HLP) and greaseHigh temperatures above +90 to +100 °C with standard TPU: it softens
Fuel oil, diesel and technical oils (aliphatic hydrocarbons)Strong (concentrated) acids and alkalis: sulfuric, nitric, caustic soda
Ozone, weather and sunlight (does not crack from weather)Acetone, MEK, toluene, benzene, dichloromethane (polar and aromatic solvents)
Water-based fire-resistant fluids HFA, HFB (only special H-PU)Synthetic ester oils and fire-resistant fluid HFD-R
Dry compressed air and technical gasesStrong alcohols (methanol, ethanol): swelling

Water and heat destroy standard PU: above +50 to +60 °C in water or damp oil it turns into a sticky paste or crumbles. If the system contains water or an emulsion, use only H-PU (hydrolysis-resistant).

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