System Delivery Safety Device; Compatibility Between Liquid Processed And Pump Materials; Lubrication Of Bearings - VARISCO J-ATEX Instrucciones De Seguridad

Safety instructions in accordance with Directive 94/9/CE - J series
Figure 3 shows a diagram of the lubrication circuit and the application of the temperature
sensor.

9. SYSTEM DELIVERY SAFETY DEVICE

It is essential to fit a maximum pressure valve in the immediate vicinity of the pump delivery
line. This component must be CE marked in compliance with directive 97/23/EC (PED),
category 4, as a safety device, and in compliance with directive 94/9/EC and the requirements
of 99/92/EC.
Absence of the maximum pressure valve safety device or non-correspondence with
the required characteristics will invalidate compliance with the requirements concerning
safety and protection of the pump against the danger of explosion.
The activation pressure of this device must be taken from the pump performance curves
corresponding to the rotation speed used, as shown in the following examples.
Example 1. At a rotation speed of 2900 rpm and a flow-rate of 50 m
the maximum pressure device must be calibrated so that the pressure does not exceed 52 m,
that is, the maximum pressure value relating to the optimum field of operation of the pump
(section with the thick line in Figure 4).
Example 2 (see Figure 5). At a rotation speed of 2900 rpm and a flow-rate of 13 m
pressure is 54 m; the maximum pressure device must be calibrated so that the pump never
operates with no flow (consequently, in the example, to a value between 54 and 56 m).
Incorrect calibration of the maximum pressure valve safety device will invalidate
compliance with the requirements concerning safety and protection of the pump against
the danger of explosion.
10. COMPATIBILITY BETWEEN LIQUID PROCESSED AND PUMP
MATERIALS
The user must always use materials compatible with the liquid processed with reference to
the pump design conditions.
Use of the pump with fluids not compatible with the pump component materials or in
an environment with the presence of incompatible fluids is forbidden in all cases.

11. LUBRICATION OF BEARINGS

The bearings must be lubricated every 500 hours of operation with mineral oil lithium grease
(HTF 5613 GRADE 3).
CAUTION
CAUTION
CAUTION
3
/h the pressure is 48 m;
3
/h the
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