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Wiper K27 63x71x5/7 PU

CodeK27-063 PU
In stock18pcs
Priceexcl. VATFrom €3.40/pcs
Wiper K27 63x71x5/7 PU—
€3.40excl. VAT

Price by quantityexcl. VAT

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Technical data

Properties
Seal typeK27
Material typePU
Material codePU9201
BrandKastas
Weight10g
Wipers dimension
Inside diameter d63mm
Outside diameter D71mm
Width h5mm
Width H7mm

Documents

Description

The K27-63x71x5/7 PU wiper ring is a double wiper seal for hydraulic piston rods. The design with a double wiping edge removes contaminants effectively while leaving a thin oil film on the piston rod surface, which reduces wear of the mating components. Technical parameters: Inner diameter (d): 63 mm Outer diameter (D): 71 mm Height (S1/S2): 5 / 7 mm Size in inches: d x D x H = 63x71x5/7 mm ≈ 2.48”x2.80”x0.20/0.28” Material: Polyurethane (PU9201) Travel speed: up to 1,0 m/s

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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