Plunger Metering Pump Sigma/ 2 (Basic Type)

Capacity range 2 – 76 l/h, 320 – 12 bar

The plunger metering pump Sigma SBKa is an extremely robust plunger metering pump with high-performance plunger and the option to adjust the pump capacity in 0.2% increments. 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.

Sigma Plunger Pump – Durable and High-Performance

The plunger metering pump Sigma/ 2 (Basic Type) (SBKa) is a metering pump, the pump capacity of which can be precisely adjusted in 0.2% increments, either manually or optionally with an electric actuator or control drive. A wide range of power end versions is available for use in areas at risk from explosion with ATEX certification.

Your benefits

Excellent process safety and reliability:

  • Metering reproducibility is better than ± 1% within the 10 – 100% stroke length range under defined conditions and with correct installation

Flexible adaptation to the process:

  • Wide range of power end versions, also for use in Exe and Exde areas and different flange designs for the use of customised motors
  • Customised designs are available on request

Technical Details

  • Stroke length: 15 mm
  • Stroke length adjustment range: 0 – 100%
  • Stroke length adjustment: manually by self-locking rotary dial in 0.2% increments (optionally with electric actuator or control drive)
  • The dosing precision is better than ± 1 % within the 10-100 % stroke volume adjustment range under defined conditions and with correct installation
  • Wetted materials: Stainless steel 1.4571/1.4404, special materials are available on request
  • High-performance oxide ceramic plunger
  • A wide range of power end versions is available: Three-phase standard motor, 1-phase AC motor, motors for use in areas at risk from explosion and different flange designs for use in customer-specific motors
  • Degree of protection IP 55
  • High-strength fibreglass-reinforced plastic housing with excellent chemical resistance
  • For safety reasons, provide suitable overflow equipment with all plunger metering pumps during installation

Control of Sigma Basic type SBKa

Stroke length actuator/control drive

Actuator for automatic stroke length adjustment, actuating period approx. 1 second for 1 % stroke length, return potentiometer 1 kΩ degree of protection IP 54.

Control drive consisting of an actuator and an integral servo controller for stroke length adjustment via a standard signal. Standard current input 0/4-20 mA corresponds to stroke length 0 – 100%. Switch-over for manual/automatic operation, key switch for stroke adjustment in manual mode, mechanical position display of actual stroke length value output 0/4-20 mA for remote display.

Variable speed motors with integrated frequency converter (identity code specification V)

Power supply 1-phase 230 V, 50/60 Hz, 0.37 kW

Externally controllable with 0/4-20 mA (see Fig. pk_2_103).

Speed controllers in metal housing (identity code specification Z)

The speed controller assembly consists of a frequency converter and a variable speed motor of 0.37 kW.

Technical Data

Type Capacity at max. back pressure with 1500 rpm motor at 50 Hz 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 Plunger Ø
  Max. stroke rate   Max. stroke rate
l/h bar ml/stroke Strokes/min l/h psi gph (US) Strokes/min m WC bar G-DN kg mm
32002 1.9 320 0.46 71 2.3 4,641 0.61 84 5.0 160 1/4 24 8
23004 4.0 230 0.52 129 4.8 3,336 1.27 154 5.0 115 1/4 24 8
14006 6.1 140 1.42 71 7.1 2,031 1.88 84 4.0 70 1/4 24 12
10006 6.4 100 0.55 195 7.6 1,450 2.01 233 5.0 50 1/4 24 8
10011 11.0 100 1.43 129 13.1 1,450 3.46 153 4.0 50 1/4 24 12
07012 12.4 70 2.90 71 14.8 1,015 3.91 85 4.0 35 1/4 24 17
05016 16.7 50 1.43 195 20.0 725 5.28 233 4.0 25 1/4 24 12
04022 22.4 40 5.26 71 26.5 580 7.00 84 4.0 20 3/8 25 23
04522 22.5 45 2.91 129 26.7 653 7.05 153 4.0 22.5 1/4 24 17
02534 34.1 25 2.92 195 40.8 363 10.78 233 4.0 12.5 1/4 24 17
02541 41.5 25 5.37 129 49.2 363 13.00 153 4.0 12.5 3/8 25 23
01264 64.0 12 5.45 195 76.0 174 20.08 233 4.0 6 3/8 25 23

Materials in Contact with the Medium

Identity code of material Dosing head Suction / discharge connection on dosing head DN 25 Seals/ball seat Balls Ball seat
SST Stainless steel 1.4404 Stainless steel 1.4404 PTFE or PTFE +25 % carbon Ceramic Stainless steel 1.4404

Motor Data

Identity code specification Power supply Remarks
S 3-phase, IP 55* 230 V/400 V 50 Hz 0.25 kW
R 3-phase, IP 55* 230 V/400 V 50/60 Hz 0.37 kW With PTC, speed control range 1:20 with external fan 1-phase 230 V; 50/60 Hz
V0 1-phase, IP 55* 230 V 50/60 Hz 0.37 kW Variable speed motor with integrated frequency converter
M 1-phase AC, IP 55 230 V ± 5 % 50/60 Hz 0.18 kW
N 1-phase AC, IP 55 115 V ± 5 % 60 Hz 0.18 kW
L1 3-phase, II 2G Ex e II T3 220 – 240 V/380 – 420 V 50 Hz 0.18 kW On request
L2 3-phase, II 2G Ex de IIC T4 220 – 240 V/380 – 420 V 50 Hz 0.18 kW With PTC, speed control range 1:5

Motor data sheets can be requested for more information.

Special motors or special motor flanges are available on request.

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.