Nederman FlexFilter User Manual Download

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FlexFilter

Contact your nearest authorized distributor or
N

for advice on technical service or

if you require help with spare parts. See also
w

7.1 Ordering spare parts

When ordering spare parts always state the following:
• The part number and control number (see the

product identification plate).

• Detail number and name of the spare part (see

• Quantity of the parts required.

8 Recycling

The product has been designed for component mater-
ials to be recycled. Different material types must be
handled according to relevant local regulations. Con-
tact the distributor or

if uncertainties arise

when scrapping the product at the end of its service
life.

9 Instructions for special modules

The following modules are covered, see

Figure 1

• Level 1: RF top modules (1B, 1C) and cyclone top

module (1D).

• Level 2: Cyclone insert (2D).
• Level 4: Stand (4 C–F) and wall mounting brackets

(4G).

• Level 5: Inlet cyclone module (5D).
• Level 7: Automatic emptying / automatic feeding

out modules (7D and 7H).

9.1 RF Top

See

Figure 1

items 1B and 1C.

WARNING! Risk of personal injury
RF top modules are fitted with compressed air
cylinders that can cause severe personal in-
jury. The compressed air supply must be shut
off before service work is carried out. Pressing
the Manual Function button a few times will re-
lease any residual pressure. Ensure the vacuum
unit can not start by switching off the main-
tenance switch and/or the main switch on the
starter.

9.1.1 Function

Figure 21

–

Figure 22

show schematically the function

of a FlexFilter Twin RF. During normal operation, the
function is the same as for a basic FlexFilter.

See

Figure 22

. When filters are cleaned, the valve

(a) closes the outlet from the FlexFilter and valve (b)
opens to atmosphere. Air is sucked with considerable
power through valve (b) and flows in a reverse direc-
tion downwards through the filter socks. The dust is

dislodged and falls into the bin. The air then flows in-
to the other side of the FlexFilter, upwards through
the filter socks into the top module. From here it con-
tinues to the vacuum unit. A connected control unit
ensures that the next cleaning cycle cleans the other
half of the filter socks.

Single RF works in the same way but here the top
module is divided into two chambers so that half the
filter socks are cleaned in one cycle and the other half
in the next cycle.

See

Figure 22

. In particularly difficult cases an addi-

tional valve (c) can be installed. This valve is normally
open but closes during filter cleaning. Now, for a short
moment, the full capacity of the vacuum unit is avail-
able for filter cleaning. No air comes through the pipe-
work. For connecting this optional valve, see the rel-
evant manual.

Figure 23

–

Figure 24

show pneumatic schematics for

Single RF and Twin RF.

9.1.2 Maintenance

The RF top needs no special maintenance. Before
emptying the dust collecting bin, manual filter clean-
ing should be carried out a couple of times. The vacu-
um unit should be running. A distinct change in sound
reveals the function. The same procedure should be
followed at approximately monthly intervals for Flex-
Filters with automatic emptying.

9.2 Stands and wall brackets

See

Figure 1

. Large dust collecting bins and automat-

ic emptying devices require stands (4 C–F) instead of
legs. In some cases, wall brackets (4G) are preferred
to legs or stands.

A separate wall bracket is available for this unit and
must be installed when the FlexFilter is wall mounted.
Wall brackets are supplied in pairs, a left-hand and a
right-hand bracket. A FlexFilter Single requires one
pair and a Twin requires two.

9.2.1 Safety

The stand should be securely anchored to the found-
ation. The foundation should be level and firm. A con-
crete foundation and expanding bolts are recommen-
ded, particularly if the FlexFilter has been fitted with
an explosion relief panel. Should a dust explosion oc-
cur, strong side forces may be generated. The stand
is not a work platform and is not fitted with steps or a
rail.

The wall brackets should be anchored to a wall or pillar
that is sufficiently solid, with adequate bolts. A Single
FlexFilter can weigh 500 kg (1100 lbs) when the bin is
full. In extreme cases, the weight may be even high-
er if the material is heavy and emptying has been neg-
lected.

The automatic feeding out device (see

Figure 1

item

7H) weighs 86 kg (189 lbs).