Promag 53 PROFIBUS DP/PA Installation
Endress+Hauser 35
3.3.5 Installing the Promag W sensor
!
Note!
Bolts, nuts, seals, etc. are not included in the scope of supply and must be supplied by the
customer.
The sensor is designed for installation between the two piping flanges:
• It is essential that you observe the necessary screw tightening torques on → 35.
• If grounding disks are used, follow the mounting instructions which will be enclosed with
the shipment.
A0011908
Fig. 23: Installing the Promag W sensor
Seals
Comply with the following instructions when installing seals:
• Hard rubber lining additional seals are always required.
• Polyurethane lining seals are not required.
• Only use seals that comply with DIN EN 1514-1 for DIN flanges.
• Make sure that the seals do not protrude into the piping cross-section.
"
Caution!
Risk of short circuit! Do not use electrically conductive sealing compound such as graphite.
An electrically conductive layer could form on the inside of the measuring tube and short-
circuit the measuring signal.
Ground cable
• If necessary, special ground cables can be ordered as accessories for potential equalization,
→ 128.
• For information on potential equalization and detailed installation instructions for using
ground cables, please refer to → 62.
Screw tightening torques (Promag W)
Note the following points:
• The tightening torques listed below are for lubricated threads only.
• Always tighten the screws uniformly and in diagonally opposite sequence.
• Overtightening the screws will deform the sealing faces or damage the seals.
• The tightening torques listed below apply only to pipes not subjected to tensile stress.
Tightening torques for:
•EN (DIN) → 36
•JIS → 38
•ASME → 38
• AWWA → 39
• AS 2129 → 39
• AS 4087 → 40
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