Hydraulic Top Link Adjustable Cylinders

Characteristics:

• Maximum Working Pressure: 200 bar
• Maximum Testing Pressure: 300 bar
• Maximum Working Speed: 0.5 m/s
• Working Temperature Range: -30ºC to +90ºC
• Oil Type: Mineral hydraulic

Material:

• Rod: Chrome plated steel F-1140
  • Minimum chrome layer thickness: 20 microns
  • Surface roughness: Ra < 0.2
  • Minimum surface hardness: 900 HV
  • Corrosion resistance: Minimum 200 hours in neutral saline fog (ISO 9227 rating 9)
• Tube: Steel ST-52-3 (DIN 2393)
  • Inside diameter tolerance: ISO H9
  • Surface roughness: Ra < 0.8 micron
• Guide-Bushing: Steel F-1140, nitrided (nitride hardening)
• Piston: Steel F-1140

Seals:

• Guide-Bushing:
  • Dynamic: Compact polyurethane rod-seal, double lip, NBR metal wiper seal
  • Static: NBR 90 shore O-ring
• Piston:
  • Dynamic: Compact double-acting polyurethane seal, nitrile O-ring as activator, special polyacetal guides reinforced with glass fiber
  • Static: Polyamide locking sealing guide

Finishing:

• Paint: Black prime painting

Recommendations:

1. Relief Valve: Protect the cylinder circuit with a relief valve set at 200 bar.
2. Oil Cleanliness: Ensure oil is clean and free of contaminants (use a filter in the cylinder circuit).
3. Bleeding the Circuit: Bleed the circuit by slightly loosening the cylinder fittings before starting up.
4. Welding Precautions:
   • Do not weld on the cylinder tube.
   • Before welding on the rod or bottom, dismount the cylinder.
5. Storage:
   • Avoid outdoor storage for long periods.
   • If outdoor storage is necessary, keep the rod completely retracted or greased.
6. Cleaning:
   • Protect the rod and oil ports during high-pressure cleaning or blasting.
7. Double-Acting as Single-Acting:
   • Connect the non-used oil port to the tank.
8. Dismounting the Cylinder:
   • Note that the piston is screwed onto the rod end and fixed with industrial glue.
   • Use industrial glue when reassembling.