Sigma/ 2 Plunger Metering Pump (Basic Type)
The Sigma/ 2 (Basic Type) is a plunger metering pump with a capacity of 0.61 – 20.08 gph (2 – 76 l/h) at pressures of 4,641 – 174 psi (320 – 12 bar) and comes with the option to adjust the pump capacity in 0.2% increments, either manually or optionally with an electric actuator. It offers a wide range of power end versions, such as three-phase or 1-phase AC motors, even for Exe and Exde areas with ATEX certification.
Benefits
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Metering reproducibility is better than ± 1% within the 10 – 100% stroke length range under defined conditions and with correct installation.
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Wide range of power end versions, also for use in Exe and Exde areas and different flange designs for the use of customized motors
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Customized designs are available on request
Excellent process safety and reliability:
Flexible adaptation to the process:
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Features
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Performance range 0.61 - 20.08 gph (2 - 76 l/h), 4,641 - 174 psi (320 - 12 bar)
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High strength metal internal housing for parts, which are subjected to stress as well as additional plastic housing for corrosion protection
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Stroke length: 15 mm, adjustable using self-adjusting knob at 0.2% stages
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Metering head materials: Stainless steel 1.4571/1.4404
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Reproducibility of metering better under defined conditions and correct installation ± 1% (stroke length 30-100%)
Features Basic Type (S2Ba)
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Wide selection of drive variations: Three-phase standard motor, single-phase alternating current motor, motors for use in the EXe and EXde area, different flange designs for use with customer-specific motors.
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Protection class IP 55 (optional ATEX-T3/T4)
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Stroke length setting: manual (optional with actuator or variable speed drive)
Applications
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Volume-proportional metering of chemicals in the treatment of boiler feed water
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Metering of reactants and catalysts in the chemical industry
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Level-dependent metering of auxiliary agents in industrial production engineering, for instance hot wax metering in the production of adhesive strips
Capacity Data
| TypeSigma/2 HK | Capacities at 50 Hz | at 60 Hz | ||||||
|---|---|---|---|---|---|---|---|---|
| psi | (l/h) gph | ml/stroke | Suction Lift mWS |
Connector Size Rp | ||||
| bar | l/h | strokes/min. | ||||||
| 32002 | 320 | 1.9 | 71 | 4,641 | 2.3 / 0.61 | 84 | 5 | 1/4 |
| 23004 | 230 | 4.0 | 129 | 3,336 | 4.8 / 1.27 | 154 | 5 | 1/4 |
| 10006 | 100 | 6.4 | 195 | 1,450 | 7.6 / 2.01 | 233 | 5 | 1/4 |
| 14006 | 140 | 6.1 | 71 | 2,031 | 7.1 / 1.88 | 84 | 4 | 1/4 |
| 10011 | 100 | 11.0 | 129 | 1,450 | 13.1 / 3.46 | 153 | 4 | 1/4 |
| 5016 | 50 | 16.7 | 195 | 725 | 20.0 / 5.28 | 233 | 4 | 1/4 |
| 7012 | 70 | 12.4 | 71 | 1,015 | 14.8 / 3.91 | 85 | 4 | 1/4 |
| 4522 | 45 | 22.5 | 129 | 652 | 26.7/ 7.05 | 153 | 4 | 1/4 |
| 2534 | 25 | 34.1 | 195 | 363 | 40.8 / 10.78 | 233 | 4 | 1/4 |
| 4022 | 40 | 22.4 | 71 | 580 | 26.5/ 7.00 | 84 | 4 | 3/8 |
| 2541 | 25 | 41.5 | 129 | 363 | 49.2 / 13.00 | 153 | 4 | 3/8 |
| 1264 | 12 | 64.0 | 195 | 174 | 76.0 / 20.08 | 233 | 4 | 3/8 |
Liquid end materials in contact with media
| Version | Liquid End | Suction/Discharge valves | Seals | Valve balls | Diaphragm* |
|---|---|---|---|---|---|
| SST | Stainless steel | Stainless steel | PTFE or PTFE w/graphite | Ceramic | Stainless steel |