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Inspection

• Remove old gasket and all residue from surface of flange carefully
• Inspect flange surface and new gasket for any defects prior to install
• Verify gasket material is as required for compatibility
• Repair all nicks/gouges ( >1/32’’ in depth) and replace where needed
  • Radial scratches MUST be repaired or replaced due to seal difficulty

Gasket Install

• Align flanges surfaces and bolt holes
• Ensure flanges are parallel to each other
• Insert gasket between the flanges on required sealing surface
  • If gasket contains bolt holes, ensure proper alignment
• ID of gasket should never be smaller than ID of flange
• Carefully compress mating flange down onto gasket
• Adhesive is only recommended when absolutely necessary
  • Coat minimum amount of gasket required to fix in place

Lubrication and Fasteners

• Confirm lubricant compatible with application parameters
• Recommended lubricant friction coefficient K < 0.17
• Liberally lubricate all bolt threads, washers, and nuts
  • Be careful not to contaminate gasket with lubricant
  • Hardened washers are recommended

Bolt Tightening

• Prior to tightening, consult torque tables based on application parameters to find target torque
• Never torque bolts under pressure
• If deviating from table parameters, further calculation required (consult Trelleborg engineering team)
• Utilize calibrated torque wrench during install
• Follow torque sequence and torque in star pattern as indicated below
• Final pass should be in clockwise fashion
• Depending on material, retorque bolts 24 hours after install