4.8.1 Attaching HMP378 to process with fitting body
Figure 30 HMP378 fitting body and clasp nut
1 Clasp nut (27 mm hex nut)
2 Fitting body (24 mm hex head): ISO1/2 solid structure or NPT1/2 solid structure
3 Sealing material (use one of the following options):
1. LOCTITE® No 542 + activ. No 7649 (T=−55 … +150 °C (-67 … +302 °F))
2. MEGA-PIPE EXTRA No 7188 (T=−55 … +170 °C (-67 … +338 °F))
3. PTFE tape (T=−60 … +210 °C (-76 … +410 °F))
To attach the probe to the process:
1. Detach the fitting screw from the nut and slide it o the probe body.
2. Attach the fitting screw to the chamber wall with a sealing washer. Tighten the fitting
screw into the threaded sleeve with a torque wrench. The tightening torque is 150 ± 10 Nm
(110 ± 7 ft-lbs).
3. Insert the body of the probe into the fitting screw and attach the nut manually to the
fitting screw so that the connection feels tight.
Chapter 4 – Probe options
73
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