Products

Sigma/ 2 Plunger Metering Pump


The Sigma/ 2 motor plunger metering pump with the solenoid diaphragm metering pumps type Sigma/1, Sigma/2 and Sigma/ 3 make up a universal product family. In this way the performance range covers 2 to 1,030 l/h, with one standard operating concept, control concept and spare parts management.  All three pumps are available in the basic version without their own internal electronic system and as the microprocessor version for a fast and reliable adaptation to changing dosage requirements.

Benefits

  • High processing quality: Reproducibility of dosage better than ±1%

  • Simple operation: Immediate adjustment and monitoring of dosage performance in full text via the large illuminated LC display (control version)

  • Smooth connection to complex processing management systems through optional fitting with PROFIBUS® DP interface (control version)

  • Simplified spare parts management and less stock storage with the same availability of pumps within the Sigma product family

  • Less training expenditure for operators when using the Sigma product family because the use the same operating mode

Features

  • Performance range 2 - 76 l/h, 320 - 12 bar

  • High strength metal internal housing for parts, which are subjected to stress as well as additional plastic housing for corrosion protection

  • Stroke length: 15 mm, adjustable using self-adjusting knob at 0.2% stages

  • Metering head materials: Stainless steel 1.4571/1.4404

  • Reproducibility of metering better under defined conditions and correct installation ± 1% (stroke length 30-100%)

Features Basic Type (S2Ba)

  • 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.

  • Protection class IP 55 (optional ATEX-T3/T4)

  • Stroke length setting: manual (optional with actuator or variable speed drive)

Features Control Type (S2Ca)

  • Microprocessor control: Optimum combination of rotational control and stop and go operation i.e. works in a wide control field with individual fine adjustment

  • Simple setting of the individual pump functions with five program keys

  • Large backlit LC display

  • Full text display of the pump capacity in l/h or US gal/h

  • 3 LED display for operational, warning and error signals

  • Alarm or timer relay

  • Control via contact or analogue signals (e.g. 0/4-20mA)

  • Optional integrated 2-Week-Process-Timer. The intelligent alternative to the time switch clock

  • Protection class IP 65

  • Interface for PROFIBUS®-DP

Applications

  • Metering of chemicals and additives in proportion to volume in treatment of boiler feed water

Capacity Data

TypeSigma/2 HK Capacities at 50 Hz at 60 Hz
psi (l/h) gph strokes/min.

Suction Lift mWS

Connector Size Rp
bar l/h strokes/min.
32002 320 1,9 71 4627 2,3 / 0,6 84 5 1/4
23004 230 4,0 129 3335 4,8 / 1,2 154 5 1/4
10006 100 6,4 195 1450 7,6 / 2,0 233 5 1/4
14006 140 6,1 71 2030 7,1 / 1,8 84 4 1/4
10011 100 11,0 129 1450 13,1 / 3,4 153 4 1/4
5016 50 16,7 195 725 20,0 / 5,2 233 4 1/4
7012 70 12,4 71 1015 14,8 / 3,9 85 4 1/4
4522 45 22,5 129 652 26,7/ 7,0 153 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/ 7,0 84 4 3/8
2541 25 41,5 129 363 49,2 / 18,0 153 4 3/8
1264 12 64,0 195 174 76,0 / 20,1 233 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