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Wiper TWS 90x98x5,7 PU

CodeTWS-90*98*5,7
AvailabilityOn request
Wiper TWS 90x98x5,7 PU—
€1.69excl. VAT

Technical data

Properties
Seal typeTWS
Material typePU
Weight11g
Wipers dimension
Inside diameter d90mm
Outside diameter D98mm
Width h5,7mm

Description

TWS wiper rings are installed in hydraulic cylinders to remove dirt, contaminant particles, moisture, etc. from the piston rod (tube), thus protecting the hydraulic system against contamination. These wipers are selected by dimensions: inner diameter 90 mm, outer diameter 98 mm, seal height 5,7/ mm. Made of PU material

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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