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Introduction.
The Topline Peristaltic PolyAluminium Chloride (PAC) dosing pump offers low capacity precision
output pump for the dosing of PAC directly from the carboy in which it is delivered, without further
need for diluting or decanting.
PAC is applied to swimming pools, and all such filtered water systems, to improve filtration efficiency
by increasing the size of small particles of suspended solids in the water, binding them together to
produce larger masses. A typical pool sand filter can produce a filtrate of around 20 microns. Many
small particles, including cryptosporidium, can pass straight through the filter bed at this size.
Correctly optimised PAC systems can increase the efficiency of the pool filter down to some 5
microns. Solids are backwashed away, following the filter manufacturer’s instructions for correct
backwashing rates, and results in crystal clear swimming pool.
Lowering the amount of suspended solids in the pool with PAC dosing can often lead to a marginal
lowering of chemical consumption, as there is a lower demand for chlorine from these solids, a
lowering of combined chlorine and can act as a phosphate remover, reducing algae growth.
Swimming pool PAC chemicals are normally designed only for sand filters up to a maximum filter rate
of 35m3/m2/hr.
PAC is not normally suitable for use with Diatomatious Earth filters, Cartridge filters or Zeolite filters.
PAC should only be installed pre-filter, in a full flow section of pipe work, as far from the filter as
possible, but after any chemical sample draw-off point.
PAC can only coagulate solids in stable pH conditions. pH levels between 7.0 and 8.0 should be
maintained at all times. Topline do not recommend that pre-filter chlorination (or pH correction) be
applied with PAC installations as the pH will locally fluctuate during injection, leading to poor
efficiency of ‘floc’ production.
Specification.
Topline Peristaltic Dosing Pump
Model Topline Peristaltic Dosing Pump
Capacity 1.5 –150 ml/hr
Suction Lift Max 2 m
Back Pressure 1.5 bar max.
Hose Connections: 6 mm x 4mm ID OD Soft PVC
Initial Accuracy ±10%
Operating Temperature: 5 - 55°C
Running Time 100%
Protection Rating IP65
Dimensions (W x H x D): 95 x 175 x 130 mm
Weight: 1.25 kg (approx.)
Power AC 230 V ±10%, 50/60 Hz
Fuses 0.2 A MT (fitted)
Current consumption 5 VA max
