Periodic Maintenance; Overhaul; Motor, Gearbox & Bearing; Bearing Maintenance - Formula Air Rva-X Serie Wartungshandbuch

Any repairs may only be performed with original spare parts.
IMPORTANT !
Always wear the required safety equipment. The national safety rules in force must be observed.
5.1

Periodic maintenance

In order for the RVA-X ATEX rotary valve certification approval to be guaranteed by the manufacturer, maintenance
must be carried out by the manufacturer or a distributor appointed by the manufacturer.
Periodic maintenance frequency needs to be regular enough to avoid dangerous situations or degradation to the
RVA-X ATEX rotary valve.
The wear of the components is infinitely linked to parameters set in the specific application of the RVA-X ATEX rotary
valve : running time, frequency, extraction volume, abrasive nature of the product, temperature, location.
To define the periodic maintenance frequency, we advise to check every week when you start the RVA-X ATEX rotary
valve to clearly define the necessary intervals between inspection maintenances, following installation and RVA-X
ATEX rotary valve condition evolution.
The time between 2 inspection operations cannot be more than 6 months according to the RVA-X ATEX rotary valve
status.
IMPORTANT !
Regular cleaning of the external surface of the rotary valve need to be performed to avoid dust build-
up and go over the surface temperature. The MAXIMUM allowed dust layer is 5mm.
5.2

Overhaul

For the manufacturer's guarantee for explosion safeguard to apply, the customer must have regular maintenance
carried out by the manufacturer or a distributor appointed by the manufacturer (see §4.1.).
For distributors to be approved to carry out maintenance for the manufacturer, they must be trained by the
manufacturer. The following must be checked: rubber blade vanes, rotor, bearings, gearbox and motor.
Before starting inspection or maintenance operations on the RVA-X ATEX rotary valve, you must secure the zone,
make sure that the system is switch off, and that it is impossible to inadvertently set it back in operation.
The system may not be put back into service until all components are put back in place and secured.
CAUTION !
Rubber blade vanes and sealing ring must be impermeable ! Monitor wear regularly until service intervals can be
determined (see §5.1 "Periodic maintenance").
5.3 Motor, gearbox & bearing

5.3.1 Bearing Maintenance

The lifespan of the grease is influenced by many factors. The greasing intervals in our table thus can only be seen as
very rough estimates.
Operating
temperature of
bearing °C
50
70
100
Experience with comparable bearings or ones already used is therefore very important as not all operating conditions
and influential factors that affect the service life of a lubricant – and hence also the bearing – are known or
determinable in many cases.
CAUTION !
Bearings needing re-greasing can be done with a grease gun.
Only use the grease type : SKF LGHC2, LGFQ2, or LGHB2.
At the same time must be done control of bearings visual check and control of unexpected noise. In case of found
malfunction the change of bearing is necessary.
9
User manual | RVA Rotary valves ATEX
www.formula-air. com
Greasing interval
Environmental conditions
Clean Dirty
3 years 6 months
1 year 2 months
3 months 2 weeks
Very dirty
Heavily humid
3 months
1 month
1 week