Operating instructions

Page 14
ProMinent
®
Product description S2Ba/S2Ca
2Product description S2Ba/S2Ca
Use for intended purpose
• The pump is designed as a liquid medium metering pump; it serves the purpose of metering
liquid medium within the specified line system!
• In potentially explosive atmospheres in zone 1, device category II 2G of explosion group II C,
the pump must only be operated according to the relevant type plate (and the respective EC
Declaration of Conformity) for pumps for potentially explosive atmospheres complying with
Directive 94/9/EC in accordance with the European guidelines.
• As of 01.07.2003, only pumps are permitted to be used in potentially explosive atmospheres
that have the respective markings according to EG-Ex-RL 94/9. The explosion group, category
and protection class declared on the marking must correspond with or be better than the given
conditions in the intended field of application.
• Operate the pump only within the conditions described in the technical data!
• General restrictions with regard to viscosity limits, chemical resistance and density must be
observed (refer to ProMinent
®
chemical resistance list (equipment catalogue or
www.prominent.com))!
• All other applications or conversion are prohibited!
• The pump is not designed to meter gaseous media as well as solids.
• The pump is not suitable for metering combustible liquids!
• Pumps without respective type plate (and the respective EC Declaration of Conformity) for
pumps for potentially explosive atmospheres must never be operated in potentially explosive
atmospheres.
• Only specifically trained and authorized personnel are permitted to operate the pump!
• You are obliged to observe the data in the operating instructions on the various life phases of
the device!
2.1 Identification of pump type
The identity code and serial number are given in addition to the standard technical specifications.
These two numbers must always be quoted when making any enquiries as they enable distinct
identification of the type of metering pump.
2.2 Design/Functional description
2.2.1 Functional description, drive
The ProMinent
®
Sigma/ 2 diaphragm-type metering pump is an oscillatory displacement pump
with the stroke length adjustable in steps of 0.5 %. It is driven by electric motor (1). The rotary
drive of the electric motor is stepped down by worm gear and transmitted via the eccentric roller
(3) to the push rod (4) connected to fork (8) and converted into oscillatory movement. Return
spring (5) presses the fork with push rod positively against the eccentric roller thus producing the
return stroke. The stroke is adjusted by means of stroke adjustment knob (6) and spindle (7) by
limiting the return stroke. Stroke movement is transmitted directly to the displacement diaphragm.
Interacting with the valves, this diaphragm produces the overpressure and vacuum in the liquid
end necessary for delivery. Flow is pulsating.
In the basic type, the electric motor is normally a 3-ph extended-range AC motor (refer to Section 3
for other options).
Fig. 4
BA_SI_036_06_10_EN.p65 08.06.2010, 11:38 Uhr14