SIGMA S2Ba - Manual (Page 15)

Dulcodes UV-Desinfektionsanlage
Page 15 Pr o Minent ®
Product description S2Ba/S2Ca
Fig. 1
2 Product description S2Ba/S2Ca
WARNING
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 explosion-threatened workplaces in zone 1, device category II 2G of explosion group II
C the pump may not be operated without the corresponding rating plate (and the corre-
sponding EC conformity declaration) for pumps for explosion-threatened workplaces in
accordance with guideline 94/9/EC of the European guidelines.
• From July 1st, 2003 on, only pumps with the corresponding marking according to EC-Ex-
directive 94/9 may be used in industrial premises with potentially explosive atmospheres.
The explosion group, category and type of protection shown on the marking must
correspond to or exceed the conditions prevailing in the intended area 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 (catalogue or homepage))!
• All other applications or conversion are prohibited!
• The pump is not designed to meter gaseous media as well as solids.
• For pumps without EX protection: The pump is not suitable for metering combustible
liquids!
• Pumps may never be operated in explosion-threatened workplaces without a corre-
sponding rating plate (and the corresponding EC conformity declaration) for pumps for
explosion-threatened workplaces.
• Only specifically trained and authorized personnel are permitted to operate the pump!
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).