BU HYTREL BACKUP-UP O-RING by Patriot Fluid Power
Seal Information (BU HYTREL)
TEMPERATURE RANGE :-65°F (-54°C) TO +275°F (135°C) Depending on compound
PRESSURE RANGE :55 Shore D (See Chart)
PART NUMBER :(BU)–(Dash No.)-(H55D)
Chemical Compatibility : – Hydraulic oil and other petroleum-based fluids
– Water based fluids
– Solvents
– Phosphate esters
– Excellent tear and abrasion resistance

Hytrel® (TPE) Thermoplastic Polyester Elastomer, has exceptionally high tear strength, abrasion resistance, modulus, and a wide temperature range. Hytrel® is not compatible with cresols, phenols, and highly concentrated acids. Due to its higher hardness and modulus, it is suitable for high pressure service where extrusion might be an issue. Seals made from this material can be difficult to install. Also, care must be taken not to damage the seal lips during assembly into the gland.

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