Products

New Technology, Durable Design

The ProMinent® Sigma/ 3 is a mechanically-actuated diaphragm metering pump is capable of flow rates from 46 to 274.7 gph (174 - 1040 l/h) and pressures up to 174 psig (12 bar). The entire Sigma motor-driven metering pump product range, control type S1Cb/S2Cb/S3Cb, has been equipped with intelligent features to provide a high level of operating convenience, safety and efficiency. The Sigma X features a removable HMI control unit with innovative click-wheel and 4 operating buttons. Also available in basic (non-microprocessor based version) and explosion-proof models.

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Applications

• Time-controlled chemical addition in cooling water circuits
• Proportional chemical addition in water treatment (e.g. Sodium Hypochlorite for drinking water disinfection)
• Measurement-dependent chemical addition (e.g. acid & caustic metering for pH neutralization in wastewater treatment)
• Pulse-controlled metering from variable flow meters
• Chemical process, Mining, Petrochemical, Heavy industrial, Pharmaceutical, Water and Wastewater Treatment

Features

• Certified to NSF/ANSI 61 (PVDF liquid ends)
• Universally compatible PVDF liquid ends
• Variable AC frequency combined with digital stroking frequency
• Removable HMI unit with illuminated LCD, clickwheel and 4 operation buttons
• A large backlit LCD indicates the current operating status.
• 3-LED-function as operation indicators, alarm indicator and fault indicator
• Integrated Timer (standard) and Data Logger
• Connection to complex process control systems with PROFIBUS®-DP interface
• Control via contact or analog signals (e.g. 0/4-20 mA)
• Integrated multi-layer safety diaphragm (standard) with visual rupture indicators

Sigma/ 3 Types

Basic type:

The pump may be operated manually by adjusting the stroke length knob (displacement per stroke). Automatic control of displacement per stroke via a 4-20 mA analog or 3P signal is possible with optional servomotor. Control of stroke frequency via analog signal is possible with variable speed drives (DC/SCR or AC inverter).

Control type:

Pump settings are programmable on a removeable HMI operating unit. Functions include stroke frequency, batch delivery and external control by pulse or analog signal. The Sigma/ 3 control version features information displays for flow rate (in gph or l/h) and totalized flow (gallons); accumulative stroke count with clear/reset capabilities; and stroke length adjustment displayed in increments of 1%. Three LED lights indicate operating status. Options include a programmable access code, flow monitoring, fault and pacing relays, calibration, timer and 4-20 mA output.

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