Installation, Operation and Maintenance manual
18
DFPRE 4 Dust Collectors
Monthly
1. Check dust seals on all access panels for damage or ageing and ensure they are
properly seated to prevent entry of water. This is particularly important where the
collector is located outside or in a wet atmosphere.
Faulty seals must be replaced.
2. Check operation of solenoid and diaphragm valves. If it is found necessary to
replace a diaphragm, refer to Valve disassembly/reassembly.
It may be necessary to check operation of the valves while the system is
pressurised. Care should be taken to avoid injury.
Every 2 months
1. Check connected ducting. Repair any leaks as necessary.
Every 6 months
1. Check general casing integrity and support structure. Repair or replace as
necessary.
2. The fan impellor has been dynamically balanced and the fan assembly vibration
level should be in line with category BV-3, ISO 14694. An assessment of vibration
should be made every six months, or after a significant emission, or after any
misuse and a record kept of measured values. Excessive vibration levels should
be investigated and corrected immediately.
Vibration monitoring is mandatory on category 2G, 3G and 2D fan
assemblies.
Annually
1. Remove and clean moisture separator filter element.
2. Remove drain plug and air inlet connections from compressed air manifold. Clean
out any accumulated sludge and inspect to any current local legislation.
It may be necessary to remove a diaphragm valve for internal inspection
purposes.
3. If applicable, check all flameproof enclosures, motors and cable glands for
corrosion and tightness.
In particularly aggressive environments, this period should be more
frequent.
4. If applicable, check collector earthing continuity.
5. If applicable, check measures taken to avoid ignition sources are still in place.
6. Open the clean air chamber access cover and, by looking through fan inlet eye,
inspect fan thoroughly. If necessary, remove all residual dust accumulation.
(Although the fan is located on the clean side of the collector, it is possible for
low quantities of dust to migrate through the filter media).
The fan should be inspected immediately after any period of significant
dust emission, i.e. due to damaged filter media or seal etc.
The fan should be inspected immediately if there is any unexpected noise,
temperature or vibration.
