Photo 1

Wiper 50x60x5/7 A202 PU

CodeA202-050/7 PU
In stock349pcs
Priceexcl. VATFrom PLN 7.40/pcs
Wiper 50x60x5/7 A202 PU—
PLN 7.40excl. VAT

Price by quantityexcl. VAT

Available for registered usersSign in or create an account

Technical data

Properties
Seal typeA202
Material typePU
BrandALP
Weight10g
Wipers dimension
Inside diameter d50mm
Outside diameter D60mm
Width h5mm
Width H7mm

Documents

Description

The A202 50x60x5/7 wiper ring made of polyurethane (PU). Fitted in the gland of hydraulic cylinders (colloquially also called the cylinder head, cylinder nut or cylinder cover). Its task is to remove contaminants, moisture and solid particles from the surface of the piston rod as it retracts into the cylinder. It protects the inside of the cylinder against dirt and extends the service life of the other seals. The seal has a lip profile with an additional flange that stabilises its position in the gland seat. Technical parameters: Type: wiper (wiper seal) Material: PU (polyurethane) Application: hydraulic cylinder gland Sliding speed: up to 1,0 m/s Media: hydraulic oils, water emulsions, air (to a limited extent) Dimensions: Inner diameter (d): 50 mm Outer diameter (D): 60 mm Height (H): 5/7 mm Size in inches (d×D×H): 1.97″×2.36″×0.20/0.28″

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).

We recommend: Industrial chemicals

View all

We recommend: Tools

View all