Product Short Description
Product Name: EL9010 U-cup Seal (alternative listing: Beckhoff EL9010 E-Bus End Terminal)
Product Introduction: The EL9010 appears in two distinct industrial contexts. As a U-cup seal manufactured for hydraulic/pneumatic applications, it is a polyurethane U-cup sealing element. In the automation context, the EL9010 is documented as a Beckhoff E-Bus end terminal that terminates the terminal block on the right side of an EtherCAT coupler.
Description
Technical Specifications:
- Seal version: Material: Polyurethane (PUR) with NBR energizer; Max. operating pressure: 400 bar; Temperature range: -30°C to +100°C (mineral oils), +5°C to +50°C (HFA/HFB), -30°C to +40°C (HFC); Max. speed: 0.5 m/s
- E-Bus terminal version: Electrical isolation: 500 V RMS between E-Bus and signal voltage; Operating temperature: 0°C to +55°C; Storage temperature: -25°C to +70°C; Humidity: 5% to 95% non-condensing; Protection class: IP20; Weight: approx. 50 g
Functional Features: The U-cup provides rod/piston sealing with galvanically isolated, pressure-resistant lip geometry. The E-Bus end terminal provides passive termination with no additional functions or connection facilities, no address or configuration required.
Structural Characteristics: U-cup seal with cross-sections ranging from 3.18 mm to 19.5 mm, available in inner diameters from 19.05 mm to 165.1 mm. The E-Bus terminal is a compact DIN-rail mountable module.
Working Principle: The U-cup uses fluid pressure to energize the NBR energizer, forcing the PUR lips against the cylinder wall and rod to maintain sealing. The E-Bus end terminal closes the E-Bus communication line.
Installation Requirements: U-cup requires groove dimensions per DIN standards — surface roughness of sliding surface ≤ 0.4 µm Ra, groove base ≤ 1.6 µm Ra, groove flanks ≤ 3.2 µm Ra; hardware tolerance: Ød f7 (rod) / h11 (piston), ØD H10. The E-Bus terminal offers variable installation positions.
Usage Notes: Maximum sealing gap must be calculated based on pressure (e.g., at 400 bar, S ≤ 0.15 mm for cross-section ≤ 5 mm). E-Bus terminal conforms to EN 61000-6-2/6-4 EMC standards, EN 60068-2-6/27/29 vibration/shock resistance, and carries CE certification.






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