TapFlo Sanitary Series, Руководство Iom

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1. INTSTALLATION
Tapflo sanitary pump series
12
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using elastomer valve balls (EPDM, NBR or polyurethane) instead of PTFE, ceramic or
stainless steel, provided that the elastomer is compatible with the pumped liquid.
1.7.5. Temperature hazards
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Raised temperature can cause damage on the pump and/or piping and may also be
hazardous for personnel in the vicinity of the pump/piping. Avoid quick temperature
changes and do not exceed the maximum temperature specified when the pump was
ordered. See also general max temperatures based on water in chapter 6. “DATA”.
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When the pump is exposed to ambient temperature variations or if there is big difference
between the temperature of the product and the surrounding, the tightening torques of
the housing nuts should be checked periodically as part of preventive maintenance. Please
contact Tapflo for tightening intervals recommendation.
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If a hot product is pumped, the pump should not stand still when filled for a longer period
of time. This could cause leakage from the valves and contamination and/or damage of
the air valve.
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Below 0°C (32°F) plastic materials become more fragile what can cause accelerated wear
of parts made of these materials. This is a hazard that has to be accepted when pumping
such cold products. Also in such case, when a pump is not operational it should be drained
of all liquid.
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Bear in mind that the viscosity of the product changes with temperature. This has to be
taken into consideration when selecting the pump.
1.8. Air connection
Screw the air hose into the air intake on the centre block of the pump with for example a
bayonet coupling. For best efficiency, use the same hose diameter as the internal diameter of
the connection on the air intake.
1.8.1. Air treatment system
The air valve is constructed for oil-free air. Lubrication of the air is not allowed. However, if
the air is very dry (laboratory air), the air may be lubricated with water. Maximum air pressure
is 8 bar. As prevention purpose, a filtration of the air by means of a 5 micron filter or finer is
recommended. Recommended air quality according to PN-ISO8573-1:2010 is particles class 6,
water class 4 and oil class 4. Dirt in the air can under unfortunate circumstances be the cause
of a breakdown.
To facilitate the operation of the pump we recommend an air treatment system connected to
the air supply. These components should be included:
1) Regulator to adjust the air pressure;
2) Manometer to read the actual pressure;
3) Needle valve to adjust the air flow (especially when operating the pump in the lower range
of performance);
4) Filter.
These components are included in Tapflo’s Air treatment system which can be ordered from
us.