10
A.0500.601 – Atex IM -TG G/H/MAG/SRT/08.00 EN (01/2021)
1.9 Monitoring
If the good functioning and maximum allowable surface temperatures cannot be ensured
by regular inspection by the operator, suitable monitoring devices must be provided.
1.9.1 Monitoring TG GS, GP, GM, H and SRT
Surface temperature monitoring is always of extreme importance in the following areas,
see figure 1:
• Surface temperature of the pump casing at the front cover (L1).
• Surface temperature at the gland end, gland packing or mechanical seal (L2). In case
of a quenched or double mechanical seal, monitoring can be done by checking the
quench fluid, see paragraph 5.3. Use of a quenched single mechanical seal or a double
mechanical seal is recommended when there is a risk of dry running or lubrication failure
of the mechanical seal such as in case of self priming.
• Surface temperature at the ball bearing area of the bearing bracket (L3).
The maximum allowable surface temperature of L1 and L2 refers to T
A
.
The maximum allowable surface temperature of L3 refers to the maximum temperature of
the bearing bracket.
Additional vibration monitoring can be useful to detect excessive vibrations, indicating
premature failure of ball bearing or internal wear in the following areas:
• internal areas at the pump front (V1).
• ball bearing at bearing bracket (V2).
Fig 1 – Indication of monitoring possibilities and advised locations (optionally)
