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Motor-driven Metering Pump Sigma/ 2 (Basic Type)

Capacity range 14.7 – 110.9 gph (56 - 420 l/h), 232 - 58 psi (16 - 4 bar)

Robust motor-driven metering pumps like the Sigma/ 2 Basic guarantee excellent process reliability with their patented multi-layer safety diaphragm. The diaphragm metering pump offers a number of power end versions, also suitable for use in areas at risk from explosion.

Product description

The robust pump for safe and reliable use.

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 4.49 - 272.1 gph (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.

Features and Benefits

Excellent process reliability:

  • 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

Flexible adaptation to the process:

  • 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
  • Customised designs are available on request
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    Changing Liquid Ends

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    Turndown Ratio

Field of application

The following list is a general representation of basically suitable applications for this product. Please contact your personal representative to discuss the use of the product in your individual application.

  • 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

    Technical Details

    • Stroke length: 5 mm,
    • Stroke length adjustment range: 0 – 100%
    • Stroke length adjustment: manually using self-locking rotary dial in 1% increments (optionally with actuator or control drive)
    • With the right, constant conditions, correct installation and calibration, precision exceeds ±1 %, based on maximum stroke volume.
    • Wetted materials: PVDF, stainless steel 1.4571/1.4404, special materials on request
    • Patented multi-layer safety diaphragm with optical diaphragm rupture display (as option 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 AC 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)
    • IP 55 degree of protection
    • High-strength fibreglass-reinforced plastic housing with excellent chemical resistance
    • For reasons of safety, provide suitable overflow devices during installation for all mechanically deflected diaphragm metering pumps.

    Technical Data

    Type

    Pump capacity at max. back pressure with 1800 rpm motor at 60 Hz

    Suction lift

    Perm. pre-pressure suction side

    Connector Suction/Discharge Side

    Shipping weight

    Max. stroke rate

    S2Ba

    gph | l/h

    psi

    ml/stroke

    Strokes/min

    ft | m WC

    psi

    inches

    lb | kg

    * For the Sigma types 07120, 07220 and 04350, the dosing head is fitted with DN 25 (G 1 1/2) valves. As DN 20 is generally sufficient for the pipework for these types (see technical data, suction/discharge side connector), the connector parts that can be ordered with the identity code (e.g. inserts) are already reduced to DN 20, i.e. DN 20 pipework and accessories can be installed.

    16050 PVT

    15.8 | 60.0

    145

    11.4

    87

    23 | 7

    44

    1/2 MNPT

    33.1 | 15

    16050 SST

    14.7 | 56.0

    232

    11.4

    87

    23 | 7

    44

    1/2 FNPT

    44.1 | 20

    16090 PVT

    28.0 | 106.0

    145

    11.4

    158

    23 | 7

    44

    3/4 MNPT

    33.1 | 15

    16090 SST

    25.9 | 98.4

    232

    11.4

    158

    23 | 7

    44

    1/2 FNPT

    44.1 | 20

    16130 PVT

    42.8 | 162.0

    145

    10.9

    238

    23 | 7

    44

    3/4 MNPT

    33.1 | 15

    16130 SST

    39.0 | 148.0

    232

    10.9

    238

    23 | 7

    44

    1/2 FNPT

    44.1 | 20

    07120 PVT *

    39.6 | 150.0

    102

    27.4

    87

    16 | 5

    15

    3/4 MNPT

    35.3 | 16

    07120 SST *

    39.6 | 150.0

    102

    27.4

    87

    16 | 5

    15

    3/4 MNPT

    52.9 | 24

    07220 PVT *

    69.7 | 264.0

    102

    27.7

    158

    16 | 5

    15

    3/4 MNPT

    35.3 | 16

    07220 SST *

    69.7 | 264.0

    102

    27.7

    158

    16 | 5

    15

    3/4 MNPT

    52.9 | 24

    04350 PVT *

    110.9 | 420.0

    58

    29.4

    238

    16 | 5

    15

    1 MNPT

    35.3 | 16

    04350 SST *

    110.9 | 420.0

    58

    29.4

    238

    16 | 5

    15

    1 MNPT

    52.9 | 24

    Performance data for TTT, see type PVT

    Materials in Contact with the Medium

    Identity code of material

    Dosing head

    Connection on suction/discharge side

    Seals/ball seat

    Balls

    Integral relief valve

    * With 07120, 07220, 04350

    ** Specifically for areas at risk from explosion

    PVT

    PVDF

    PVDF

    PTFE/PTFE

    Ceramic/glass *

    PVDF/FKM or EPDM

    SST

    Stainless steel 1.4404

    Stainless steel 1.4581

    PTFE/PTFE

    Stainless steel 1.4404

    Stainless steel/FKM or EPDM

    TTT **

    PTFE + 25% carbon

    Carbon-filled PTFE

    PTFE/PTFE

    Ceramic/glass *

    -

    PVF

    PVDF

    PVDF

    PTFE/PTFE

    Ceramic/glass *

    PVDF/FKM or EPDM

    SSF

    Stainless steel 1.4404

    Stainless steel 1.4581

    PTFE/PTFE

    Stainless steel 1.4404

    Stainless steel/FKM or EPDM

    SSG

    Stainless steel 1.4404

    Stainless steel 1.4581

    PTFE/stainless steel 1.4404

    Stainless steel 1.4404

    -

    SSH

    Stainless steel 1.4435

    Stainless steel 1.4435

    EPDM or FKM/stainless steel 1.4435

    Ceramic

    -

    Motor Data

    Identity code specificationPower supplyΔ/Y   
    M1-phase AC230 V50/60 Hz  
    N1-phase AC115 V60 Hz  
    S3-phase230 V/400 V50/60 Hz  

    Motor data sheets can be requested for more information. Versions 265/460V - 60Hz, special motors or special motor flanges are available on request.

    Motors less than 0.75 kW and motors designed for speed-controllable operation are not subject to the IE3 standard in compliance with the Ecodesign Directive 2009/125/EC.

    Information for use in areas at risk from explosion

    Only use pumps with the appropriate labelling in line with the ATEX Directive 2014/34/EC in premises at risk from explosion. Ensure that the explosion group, category and degree of protection specified on the label correspond to or are superior to the conditions prevalent in the intended application.

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    Overview

    The robust pump for safe and reliable use.

    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 4.49 - 272.1 gph (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.

    Features and Benefits

    Excellent process reliability:

    • 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

    Flexible adaptation to the process:

    • 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
    • Customised designs are available on request

    Video

    Application

    Technical Data

    Downloads

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    +1 412-787-2484 

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