VARISCO SaxMag V Series, Руководство по эксплуатации

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OPERATING MANUAL - SAXMAG V
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Variant 2:
II 2 G Eex c Tx
II 2 G: Surface unit intended for use in an area where an explosive atmosphere in the form of
gases or mists is likely to occur in normal operation occasionally (EN 1127-1 Sec. 6.3)
Eex c: Equipment with protection by constructional safety (prEN 13463-5)
TX: If the pump is used in a potentially explosive area, the attached temperature monitor will
switch off the pump automatically 10°C before the maximum admissible temperature for
the site of application is reached. On the suction side of the pump the temperature of the
pumped medium should be at least 10°C below the temperature specified for shutdown.
2.9.4 Checking the sense of rotation
If there is a risk of explosion during the installation phase, do not check the sense of rotation under any
circumstances by briefly switching on the unfilled pump in order to prevent any possible rise in
temperature in case of contact with rotating or stationary parts.
2.9.5 Mode of operation of the pump
Open all gate valves and shut-off elements in the piping. The pump must not discharge against a
closed system!
2.9.6 Temperature limits
Under normal operating conditions, expect the highest temperatures to occur at the surface of the
pump casing, the magnetic coupling and antifriction bearings. The surface temperature occurring on
the pump casing is equivalent to the temperature of the pumped medium. If the pump is heated,
ensure that the temperature classes specified in the Annex are observed. In the area of the bearing
frame the pump must have free contact with the environment.
At any rate, the owner of the plant must ensure that the specified fluid temperature
(operating temperature) is observed. The maximum admissible temperature of the
pumped medium depends on the relevant temperature class.
Temperature classes according to EN13463-1 are given in the table below together with the resulting
theoretical limit values for the pumped medium.
The maximum admissible temperature of the pumped medium depends on the temperature class and
the operating conditions of the pump. The temperatures given in the table below refer to a maximum
ambient temperature of 40°C.
Temperature classes
Tmax. acc. to EN 13463-1
Temperature
Pumped medium
T4 – 135°C 125°C
T3 – 200°C 190°C
T2 – 300°C 290°C
T1 – 450°C 290°C