ONICON F-5100 Inline - Manual (Page 14)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]
F-5100 Inline Thermal Mass Flow Meter Manual 05/15 - 0686-11 / 18332 Page 14
Bolt Tightening Sequence
Installation Instructions
1. Thoroughly clean all flange surfaces removing all traces of any old gasket material
or any adhesive residue.
2. Inspect all flange surfaces for warping, pitting or other surface imperfections that
may prevent a good seal.
3. Use new bolts, nuts and hardened washers. Prior to installation,
lubricate the bolt threads, nuts, washer faces and the underside of each bolt head
with lubricant (Fel Pro C5A or equivalent). This lubricant is necessary to ensure
uniform stress distribution on the sealing surface. Use care not to get any
lubricant on the gasket material.
4. Center the new gasket on the flange face. Do not allow the gaskets to protrude into
the flow stream.
5. Use the torque specifications provided by the gasket manufacturer to determine
the proper torque setting.
6. Using a torque wrench, tighten the bolts in at least three stages (30%, 60% &
100%) using a repeating pattern sequence of 12 o’clock to 6 o’clock to 3 o’clock to
9 o’clock around the flange as shown in the diagrams below.
7.
Leak test all connections.