The Sigma/ 2 diaphragm metering pump, together with pumps of type Sigma/ 1 and Sigma/ 3, represents an integrated product range. They cover the capacity range from 17 to 1,030 l/h, with a consistent operating concept, control concept and spare parts management.
A wide range of power end versions is available, including some for use in ATEX areas.
Applications for Motor-Driven Metering Pumps - Sigma/ 2 (Basic Type)
Suitable for use in areas at risk from explosion.
Volume-proportional addition of chemicals in water treatment, e.g. sodium-calcium hypochlorite for the disinfection of potable water
Addition of chemicals depending on the measured value, e.g. metering of acid and alkali for pH neutralisation in waste water treatment
Time-controlled addition of chemicals in the cooling water circuit
Pulse-controlled metering in the bottling of different volumes e.g. glycerin filling of manometers
The Sigma product range is available as standard in the "Physiologically safe in respect of wetted materials" “F” design.
Metering pumps with electro-polished stainless steel metering head enable them to be used in hygienically challenging applications
Wide range of power end versions, also for use in areas at risk from explosion, and different flange designs for the use of customised motors
Highly rigid fibreglass-reinforced plastic housing with excellent chemical resistance
Why Choose This Product
In the event of an accident, the feed chemical does not escape to the outside nor into the pump's power end, thanks to the patented multi-layer safety diaphragm with optical (optionally electric) signalling
Integrated relief valve protects the pump against overloading
Reliable operation by bleed option during the suction process
Specifications of this product
Capacity range 50 – 420 l/h, 16 – 4 bar
Stroke length: 5 mm,
Stroke length adjustment range: 0 – 100%
Stroke length adjustment: manually by self-locking rotary dial in 1 % increments (optionally with actuator or control drive)
Metering reproducibility is better than ± 2% in the 30 – 100 % stroke length adjustment range under defined conditions and with correct installation.
Wetted materials: PVDF, stainless steel 1.4571/1.4404, special materials on request
Patented multi-layer safety diaphragm with optical diaphragm rupture display (optionally with diaphragm rupture warning system via a contact)
Integrated hydraulic relief and bleed valve
Degree of protection IP 55
A wide range of power end versions is available: Three-phase standard motor, 1-phase AC motor, motors for use in areas at risk from explosion and different flange designs for use in customer-specific motors
For areas at risk from explosion II 2G Ex h IIC T3 Gb X or II 2G Ex h IIC T4 Gb X (optional)
For reasons of safety, provide suitable overload protection mechanisms when installing all mechanically deflected diaphragm metering pumps.
ProMinent Australia | Fluid Controls | Pump Equipment
ProMinent is a manufacturer of equipment and systems for chemical fluid metering and monitoring. With headquarters in Heidelberg, Germany, the ProMinent Group has over 2,000 employees worldwide. With ...