Richdon Koi UltraSieve MIDI User manual

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In ns st tr ru uc ct ti io on n M Ma an nu ua al l
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Ul lt tr ra aS Si ie ev ve e®
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MI ID DI I
Patent nr: NL 1026138 / EP 1593305 / US 2005/0258188-A1

1
Introduction
The MidiSieve is a pre-filterto filter waste solids from the water. Thistechnique is based upon the sieve-bend. A sieve-
bend consists of hundreds of sharp stainless steel profile wires with very small slot openings where the water can pass
through but the solids remain on the sieve bend (see picture below).
In practice it works as follows:
The water enters at Aand will go upwards and fall over the “auto-adjustable” weir (B). The water goes through the
sieve bend (C) and the waste solids will slowly go down to the waste area (D). At the waste outlet of the filter (E) you
can put a sliding valve to easily wash away the waste with water. When the water in the area underneath the sieve-
bend isnot pumped away fast enough the water level will raise which makes the floating system (F& B) go up to
reduce the incoming water flow. The pump will be connected to the 2" male threaded outlet (G).
An extra advantage of this pre-filter isthat the water will be provided with additional oxygen,
when it passes through the slots.
Waste solids and water
Waste solids
Water
B
C
DE
F
G
A

2
UltraSieve Installation instructions
Please read these instructions prior to installation.
If you have any questions after reading this manual, please contact your UltraSieve dealer before you start
installing to prevent mistakes.
The UltraSieve can be installed in 2 ways:
1. Gravity (pond fed), equal to the water level in a direct connection with the bottom drain (and/or skimmer)
2. Pump fed, above the ground with a free flow back to the pond.
A schematic drawing is shown below of a suggested gravity installation
Ensure the Ultrasieve is sited on an even level surface. The upper edge of the UltraSieve must be 1 cm above the
maximum water level. Between the bottom drain and the UltraSieve we strongly advise you to use a slide valve to
separate the UltraSieve from the pond when necessary. The inlet of the UltraSieve is made of 110mm Polypropylene
pipe so you can use a PVC push fit fitting. Since the UltraSieve is made of Polypropylene you cannot make glue
connections. Note: Do not install the UltraSieve directly in the soil! Make sure there is always enough room
around the unit. When there is too much pressure on the walls the unit will not function correctly.
110mm inlet
(use push fit fittings)
Outlet: PP 2” male
threaded -
PVC fitting 2” fem.
threaded/63mm
solvent
Pump connection
The pump outlet is made of a 2” PP male threaded connection. The UltraSieve
is supplied with a PVC fitting 2” fem. thread x 63mm solvent. Please use
Teflon tape or Loctite 5331 for the threaded connection. Maximum pump speed is
about 12m³/hour.
The pump connection
comes with a long
suction pipe which
draws
the water from under
the float to prevent air
suction.
Pond Water Level
NOTE: Make sure the edge of the UltraSieve is 1 cm higher than the
maximum water level
Pond
Filter
Valterra slide valve to purge the bottom drain
direct to waste without wasting the filter.
Slide valve between pond and
UltraSieve
pump
Bottom drain

3
The auto-adjustable weir with float
The UltraSieve has a floating system to prevent the water in the area under the
sieve from rising above the level of the sieve for low speed pumps and also to
prevent the water from going too low to be primed for high speed pumps. The
floating device can be installed at 3 different levels. You only have to do this
once when installing the UltraSieve or when you change pumps
Stainless Steel bolts (10 millimeter)
to adjust the height of the float
Procedure: loosen the 10mm bolts a little bit in order to move the floating device. Note: do not remove the
bolts completely, a few millimetres is enough!
Push the floating device to the left in order to move it in the vertical opening. Choose one of the 3 levels and
push the device to the right position. Fasten the bolts again. You’re done.
Level 2
This level gives the dam its middle
length, suitable for pump speeds to
± 12m³/hour.
This length prevents the water from
flooding the screen but also from
going too low which causes priming
problems.
Level 3
This level gives the dam its
minimum length, suitable for pump
speeds to ± 12m³/hour.
The minimumlength of the weir is
to have a high water level under the
screen to prevent a high speed
pump from priming air.
Level 1
This level gives the dam its
maximum length, suitable for pump
speeds to ± 6m³/hour.
The maximum length of the weir
prevents the water level underneath
the sieve from going too high for low
speed pumps.

4
Waste outlet
This 2” male threaded outlet is equipped with a 2” end cap with rubber gasket. (See left picture). You can mount a
slide valve (available at your UltraSieve dealer) on this outlet (see right picture) for easy clearance of the waste.
Pump fed application
When you want to use the UltraSieve above the water level
with a submersible pump from the pond you must connect the
pump hose to the 110mm inlet. The pump outlet will then be
used as the return flow to the pond. When this outlet is too
small in case of the pump speed you need to enlarge this
outlet.
In case the floating device is reducing the incoming water too
much because the adjustable dam is floating too high you
can remove the floating device completely. In this case you
will always have the maximum capacity.
Return to
pond
Inlet pump
Filling the floating device
Fill the unit with 1 litre of water for counter weight and put
the plug in the hole.
2” PVC cap

5
Maintenance
It is advisable to monitor the UltraSieve every day. Maintenance is very easy because of the waste outlet. In
fact maintenance is about two operations:
1. To remove the waste that is on the surface of the sieve (every day).
2. To remove the waste that has gone into the profile wires of the sieve (only when necessary).
1. Removing the waste that is on the surface of the sieve is very easy by opening the waste outlet and to
rinse the waste away with a normal hose pipe. Another method to have water run over the screen is
pushing down the adjustable dam which will flood the screen with water. When the adjustable dam is in
a low position already because of the pump speed you can pull up the dam for a short while and push
it back downwards again.
2. To remove the waste that has gone into the profile wires of the sieve you will need a hose pipe with a
powerful spray nozzle or a high-pressure machine. For this way of cleaning you have to place the sieve
in an upright position or take the sieve out of the unit.
After a certain period of time the sieve can get clogged (“fat”) and this will make it more difficult for the water to
go through. You can clean the sieve with i.e. alcohol.
Note: when you use the sieve for the very first time the surface of the sieve can also be covered with
a very thin film. Make sure you will clean the sieve very thorough with alcohol before using it
Technical Specifications
27 cm 56 cm
74 cm
SIZE MATERIAL EXTRA INFO
HOUSING 56 x 27 x 74 cm 6mm Polypropylene
INLET 110 mm spigot Polypropylene 1 x 110 mm inlet
OUTLET 2” male thread Polypropyleen Comes with PVC fitting 2“ x 63mm
WASTE 2” male thread Polypropyleen Comes with 2“ PVC end cap
SIEVE BEND 240 x 400 mm Stainless Steel 304 300 micron
CAPACITY ±12 m³/h
WEIGHT ±13 Kg. including sieve bend
Copyright SIBO 2008
Version 1.01