GASKET & Sealing Technologies

Center the gasket on the flange. This is extremely vital, especially where raised faces are involved.
Be sure surface finish and flatness are satisfactory.
Tighten the bolts to compress the gasket uniformly. This means going from side to side around the joint. See Bolting Pattern Below.
Use a torque wrench, well-lubricated fasteners and hardened flat washers to ensure correct initial loading.
All bolts should be tightened in one-third increments, according to proper bolting patterns.
Make a final check pass at the target torque value moving consecutively from bolt to bolt.
Re-torque 12 to 24 hours after initial installation. All applicable safety standards including lockout/tagout procedures should be observed.
Never use liquid-based or metallic-based anti-stick or lubricating compounds on the gaskets. Premature failure could occur as a result.

Installation