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Buffer seal RB04 60x71,6x3,4u PU [YR7788-002]

Code48003962
In stock31pcs
Priceexcl. VATFrom €3.89/pcs
Buffer seal RB04 60x71,6x3,4u PU [YR7788-002]—
€3.89excl. VAT

Price by quantityexcl. VAT

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Technical data

Properties
Seal typeRB08
Material typePU
BrandOEM
Weight7g
Hydraulic seals dimension
Rod diameter d60mm
Groove Diameter D71,6mm
Seal width h3,4mm

Description

The RB04 60x71,6x3,4u PU buffer seal (replacement for YR7788-002, our code 48003962, SKU 29420) is a sealing element used in industrial hydraulics. Made of polyurethane (PU), it provides additional protection of the system against excessive pressure and damage to the primary seals. Technical parameters: Inner diameter: 60 mm (2.36") Outer diameter: 71,6 mm (2.82") Height: 3,4 mm (0.13") Material: PU (polyurethane)

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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