05/02/2021 Rev.1
9
3.6 Operation
The metering pump is activated by a Teflon diaphragm mounted on a piston enclosed into an
electromagnet, which is fed by continuous current producing a square wave moving the piston thus,
a pressure is produced in the pump body with an expulsion of liquid from the discharge valve. Once
the electric impulse is over, the return of the piston is spring assisted thus producing the suction action
to the initial position, with a recall of liquid through the suction valve. The material used for the
construction of the pump makes it particularly suitable for aggressive liquids.
We suggest you in any case to use the compatibility tables or our technical department.
Dimensions
Series HC899 pump - wall mounting
(Fig. 1)
Series HC899 pump - base mounting
(Fig. 2)
Connection and exploded views
Tubing connections on pump head
(Fig. 9)
Manual purge
(Fig. 10)
Low level switch connection (HC899)
(Fig. 11)
HC899 series exploded view
(Fig. 16)
HC899 Pump head ball
(Fig. 17- Fig. 19)
4.0 MAINTENANCE
4.1 General maintenance comments
Regular maintenance is essential if the pump has to give good service over a
long period.
The following advice should be strictly followed:
It is difficult to estimate the periods between maintenance operations,
because of the pumps operating conditions and the chemicals employed. It is
therefore the basic responsibility of the operator to check regularly the
appearance and condition of the pump and to clean and service it according
to his findings.
ENGLISH
