Safety precautions for atex pumps, Ac6 & 8 capabilities – Finish Thompson AC8/8H User Manual
Page 5
Safety Precautions for ATEX Pumps
CAUTION: Proper o-ring material must be chosen for the fluid being pumped. Improper material selection could lead to swelling
and be a possible source of leaks. This is the responsibility of the end user.
WARNING: The pump must be checked for leaks on a regular basis. If leaks are noticed, the pump must be repaired or re-
placed immediately.
WARNING: The pump must be cleaned on a regular basis to avoid dust buildup greater than 5 mm.
WARNING: ATEX pumps must use a power monitor, flow switch, pressure switch or similar device to help protect against run-
ning dry or closed discharge valve. Any of these conditions could lead to a rise in surface temperature of the pump.
WARNING: The surface temperature of AC6 & 8 Series pumps is completely dependent on operating conditions. Pump will
transfer heat from the piping system, motor and fluid. These items must be considered as a system when assessing an ATEX ap-
plication.
WARNING: In the event of a motor bearing failure, the ceramic stationary seal face will protect the pump shaft from making
metal on metal contact until the power monitor shuts the pump down. Pump must be fitted with a power monitor that will shut down
the pump within 3 seconds of a motor bearing failure.
AC6 & 8 Capabilities
Maximum Working Pressure: AC6 - 100psi (6.9 bar)
AC8 - 120psi (8.3 bar)
Maximum Temperature: 300°F (149°C)
NOTE: Maximum temperature is application dependent. Consult a chemical resistance guide or the chemical manufacturer for chemical compatibility and
temperature limits.
Solids: Maximum particle size is 100 microns for slurries and 1/64 (0.4 mm) for occasional solids.
Maximum hardness is 80 HS. Maximum concentration is 10% by weight.
NOTE: If solids are being pumped, it is recommended that the pump have a Silicon Carbide mechanical seal. Pumping solids may lead to increased wea
r.
Minimum Allowable Flow Rate: AC6 = 10 gpm (2.3 m
3
/hr)
AC6H = 3 gpm (0.7 m
3
/hr)
AC8 = 20 gpm (4.5 m
3
/hr)
AC8H = 5 gpm (1.1 m
3
/hr)
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