Mankenberg M XTRA RP 840 Betriebsanleitung Seite 9

If installed in the opposite direction to the arrow, the fitting will not perform its intended
function.
caution
• The fitting mist be installed without any tension. In the case of an already installed system, the
geometry of the pipeline must match the face-to-face length of the fitting.
It is necessary to ensure that even under operating conditions no tension from the
pipeline is transferred to the fitting.
note
A MANKENBERG fitting made of "high grade" or "high grade pure" stainless steel (austeni-
te, e.g. 1.4404 or 1.4435) does not need any surface protection for normal environmental
atmosphere and for normal weather conditions.
External parts of the fitting made of low-alloy or non-alloy materials that are supplied
ex-works with a primer have to be provided with a suitable coating by the customer.
note
Caution:
Never paint over the marking(s) of the fitting (either etched into the body or on nameplate).
• A pressure-regulating valve should first be adjusted during the initial start-up by setting the adjusting
screw on the pilot valve to the operating conditions – see Section 7 <Initial start-up>.
In addition, the following applies to the pipeline connection:
with flanges:
The sealing surfaces on the body of the fitting are formed in accordance with the MANKEN-
BERG order confirmation. The accompanying flange seals are generally not included in
the MANKENBERG supply schedule.
note
• During installation, centre the fitting by means of the flange screws on the mating flange before the
screws are tightened.
with screw-mountings:
The connecting surfaces on the body of the fitting are formed in accordance with the
MANKENBERG order confirmation. The required seals are generally not included in the
MANKENBERG supply schedule.
note
with welding ends:
• Properly performed welding must ensure that no significant tension is transferred to either the sec-
tion of pipeline or the body of the fitting.
• Under no circumstances may the body of the fitting exceed the temperature marked on it; otherwise
the sealing and functional parts will be damaged and the whole fitting will become unserviceable.
When a fitting with a body made of "high grade" or "high grade pure" deep-drawn parts (vi-
sible on the body connection with clamp rings) is welded, the welding joint must be carried
out with special care; it is recommended that the body should be kept cool with a damp
cloth.
caution
Failure to observe this instruction may cause distortion of the fitting body: even 0.1 mm of
permanent distortion in the seat region may render the fitting unserviceable.
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