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Wiper K27 25x31x3,6/4,8 PU

CodeK27-025/2 PU
In stock10pcs
Priceexcl. VATFrom €2.40/pcs
Wiper K27 25x31x3,6/4,8 PU—
€2.40excl. VAT

Price by quantityexcl. VAT

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Technical data

Properties
Seal typeK27
Material typePU
Material codePU9201
BrandKastas
Weight2g
Wipers dimension
Inside diameter d25mm
Outside diameter D31mm
Width h3,6mm
Width H4,8mm

Documents

Description

The K27 25×31×3,6/4,8 PU wiper ring from Kastas is a double-acting wiper – it removes dirt, dust and moisture from the piston rod surface and at the same time acts as an additional seal. It protects the inside of the cylinder from contamination and supports the operation of the sealing system. Made of polyurethane (PU) in blue, it is highly resistant to demanding operating conditions. Technical parameters: Inner diameter: 25 mm (0.98 inch) Outer diameter: 31 mm (1.22 inch) Working height: 3,6 mm (0.14 inch) Total height: 4,8 mm (0.19 inch) Material: PU9201 (polyurethane) Color: blue Kastas code: K27-025/2 PU

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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