SKF LTP-439-E3R Hydraulic piston seal
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Product Description
SKF LTP-439-E3R hydraulic piston seal. Hydraulic cylinder piston seal — single-acting or double-acting execution. Materials cover filled PTFE, polyurethane, NBR / HNBR elastomer with anti-extrusion back-up ring. Groove dimensions per ISO 7425-1. Standard temperature range -30 to +110 °C for elastomer, -30 to +200 °C for PTFE. Suitable for marine hydraulic winches, deck cranes, steering-gear rams, hatch-cover actuators.
Technical Specifications
- Type
- Hydraulic piston seal
- Designation
- SKF LTP-439-E3R
- HS code
- 4016.93
- Cylinder bore diameter
- 177.85 mm
- Piston groove diameter
- 165.81 mm
- Piston groove width
- 9.53 mm
- Pressure limit, maximum
- 34 N/mm²
- Design
- LTP
- Primary sealing element
- Nitrile Rubber (NBR A-8501)
- Compound 2
- Polyamide (PA P-2506)
- Unit system
- Inch
- Product net weight
- 0.0348 kg
- eClass code
- 23-07-01-90
- UNSPSC code
- 31181602
Standards & Compliance
- Standard
- SKF designation convention (see description for governing ISO / DIN)
- Material
- As declared by SKF designation suffix
- Temperature Range
- Per SKF product data
- HS Code
- 4016.93
Cross References
- Trelleborg 4393
- Parker 4393
- Freudenberg 4393
- Hallite 4393
- Equivalent: 4393 (Trelleborg)
- Equivalent: 4393 (Parker)
- Equivalent: 4393 (Freudenberg)
- Equivalent: 4393 (Hallite)
Compatibility & Fitment
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Product Documentation
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Technical guides
- Hydraulic Seal Size Finder — Rod Seals, Buffer Seals, Piston Seals, Wipers and Guide Rings by Rod / Bore and Groove Dimensions (SKF)
- SKF 81xxx Cylindrical Roller Thrust Bearing — Dimensions, Load Ratings & Interchange (81102 to 81140)
- SKF Deep Groove Ball Bearing Reference — 6000 / 6200 / 6300 / 6400 Series (Dimensions, Load Ratings, Interchange to FAG NSK NTN Timken)
Catalogue entry last verified: 2026-08-13. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy LTP-439-E3R?
- LTP-439-E3R can be ordered from cballast.com as a SKF catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this SKF product?
- The manufacturer part number is LTP-439-E3R.
- What is the HS code for LTP-439-E3R?
- The customs tariff (HS) code for LTP-439-E3R is 4016.93.
- Who manufactures LTP-439-E3R?
- LTP-439-E3R is a SKF product in the Seals & Gaskets range.
- Is a datasheet available for LTP-439-E3R?
- Yes — the LTP-439-E3R datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for LTP-439-E3R?
- The minimum order quantity is 1.
- Is LTP-439-E3R available?
- Yes — LTP-439-E3R is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).