Motor-Driven Metering Pumps - Sigma/ 3 (Basic Type) Get latest price

The Sigma/ 3 diaphragm metering pump together with pumps of type Sigma/ 1 and Sigma/ 2 represent 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 areas at risk from explosion. It also offers a wide range of power end versions, such as three-phase or 1-phase AC motors, also for use in ATEX areas.

Applications for Motor-Driven Metering Pumps - Sigma/ 3 (Basic Type)

• 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

Features 

• The entire Sigma product range is available as standard in a "Physiologically safe in respect of wetted materials" 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 146 – 1,030 l/h, 12 – 4 bar
• Stroke length: 6 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
• A wide range of power end versions is available: Three-phase standard motor, 1-phase AC motor, motors for use in Exe and Exde areas 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)
• Degree of protection IP 55
• For reasons of safety, provide suitable overload protection mechanisms when installing all mechanically deflected diaphragm metering pumps.