The robust pump for safe and reliable use
The Sigma/ 3 diaphragm metering pump together with pumps of type Sigma/ 1 and Sigma/ 2 represent an integrated product range. They cover the capacity range from 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 areas at risk from explosion.
Your 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 entire Sigma product range is available as standard in a "Physiologically safe in respect of wetted materials" 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
Technical Details
- Stroke length: 6 mm,
- Stroke length adjustment range: 0 – 100%
- Stroke length adjustment: manually by self-locking rotary dial in 1 % increments (optionally with actuator or control drive)
- Metering reproducibility is better than ± 2% in the 30 – 100 % stroke length adjustment range under defined conditions and with correct installation.
- Wetted materials: PVDF, stainless steel 1.4571/1.4404, special materials on request
- Patented multi-layer safety diaphragm with optical diaphragm rupture display (optionally 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 motor, 1-phase AC motor, motors for use in Exe and Exde areas 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)
- Degree of protection IP 55
- Highly rigid fibreglass-reinforced plastic housing with excellent chemical resistance
- For reasons of safety, provide suitable overload protection mechanisms when installing all mechanically deflected diaphragm metering pumps.
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 |
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| Max. stroke rate |
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S3Ba | l/h | bar | ml/stroke | Strokes/min | l/h | psi | gph (US) | Strokes/min | m WC | bar | G-DN | kg |
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* Only available for 50 Hz. |
** DN32 plate valves with valve spring |
120145 PVT | 146 | 10 | 33.7 | 72 | 174 | 145 | 45.9 | 86 | 5 | 2 | 1 1/2–25 | 22 |
120145 SST | 146 | 12 | 33.7 | 72 | 174 | 174 | 45.9 | 86 | 5 | 2 | 1 1/2–25 | 26 |
120190 PVT | 208 | 10 | 33.7 | 103 | 251 | 145 | 66.3 | 124 | 5 | 2 | 1 1/2–25 | 22 |
120190 SST | 208 | 12 | 33.7 | 103 | 251 | 174 | 66.3 | 124 | 5 | 2 | 1 1/2–25 | 26 |
120270 PVT | 292 | 10 | 33.8 | 144 | 351 | 145 | 92.7 | 173 | 5 | 2 | 1 1/2–25 | 22 |
120270 SST | 292 | 12 | 33.8 | 144 | 351 | 174 | 92.7 | 173 | 5 | 2 | 1 1/2–25 | 26 |
120330 PVT * | 365 | 10 | 33.8 | 180 | - | - | - | - | 5 | 2 | 1 1/2–25 | 22 |
120330 SST * | 365 | 12 | 33.8 | 180 | - | - | - | - | 5 | 2 | 1 1/2–25 | 26 |
070410 PVT | 410 | 7 | 95.1 | 72 | 492 | 102 | 129.9 | 86 | 4 | 1 | 2–32 ** | 24 |
070410 SST | 410 | 7 | 95.1 | 72 | 492 | 102 | 129.9 | 86 | 4 | 1 | 2–32 ** | 29 |
070580 PVT | 580 | 7 | 95.1 | 103 | 696 | 102 | 183.8 | 124 | 4 | 1 | 2–32 ** | 24 |
070580 SST | 580 | 7 | 95.1 | 103 | 696 | 102 | 183.8 | 124 | 4 | 1 | 2–32 ** | 29 |
040830 PVT | 830 | 4 | 95.1 | 144 | 1,000 | 58 | 264.1 | 173 | 3 | 1 | 2–32 ** | 24 |
040830 SST | 830 | 4 | 95.1 | 144 | 1,000 | 58 | 264.1 | 173 | 3 | 1 | 2–32 ** | 29 |
041030 PVT * | 1,030 | 4 | 95.1 | 180 | - | - | - | - | 3 | 1 | 2–32 ** | 24 |
041030 SST * | 1,030 | 4 | 95.1 | 180 | - | - | - | - | 3 | 1 | 2–32 ** | 29 |
Performance data for TTT, see type PVT
Materials in Contact With the Medium
Identity code of material | Seals | Suction/pressure connector on dosing head DN 25 | Suction/pressure connector on dosing head DN 32 |
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* The valve spring is coated with CTFE (resistance similar to PTFE) |
** With design “F”, the ball seat is made of PVDF, only for DN 25 ball valves |
*** Specifically for areas at risk from explosion |
PVT | PTFE | PVDF | Glass | PTFE ** | PVDF | Ceramic/Hastelloy C + CTFE * | PTFE | PVDF/FKM or EPDM |
SST | PTFE | Stainless steel 1.4581 | Stainless steel 1.4404 | PTFE ** | Stainless steel 1.4581 | Stainless steel 1.4404/Hastelloy C | PTFE | Stainless steel/FKM or EPDM |
TTT *** | PTFE | PTFE + 25% carbon | Ceramic | PTFE ** | PVDF | Ceramic/Hastelloy C + CTFE * | PTFE | - |
Motor Data
| Identity code specification | Power supply | Δ/Y | | | Remarks |
| S | 3-phase, IP 55 | 220 - 240 V/380 - 420 V | 50 Hz | 0.37 kW | |
| T | 3-phase, IP 55 | 220 - 240 V/380 - 420 V | 50 Hz | 0.37 kW | With PTC, speed control range 1:5 |
| R | 3-phase, IP 55 | 220 - 240 V/380 - 420 V | 50 Hz | 0.55 kW | With PTC, speed control range 1:20 with external fan (1-phase 230 V; 50/60 Hz, 134 W) |
| M | 1-phase AC, IP 55 | 230 V ± 5 % | 50/60 Hz | 0.55 kW | |
| N | 1-phase AC, IP 55 | 115 V ± 5 % | 60 Hz | 0.55 kW | |
| L1 | 3-phase, II2GExellT3 | 220 – 240 V/380 – 420 V | 50 Hz | 0.37 kW | |
| L2 | 3-phase, II2GExdllCT4 | 220 – 240 V/380 – 420 V | 50 Hz | 0.37 kW | With PTC, speed control range 1:5 |
| P1 | 3-phase, II2GExellT3 | 250 – 280 V/440 – 480 V | 60 Hz | 0.37 kW | |
| P2 | 3-phase, II2GExdllCT4 | 250 – 280 V/440 – 480 V | 60 Hz | 0.37 kW | With PTC, speed control range 1:5 |
Motor data sheets can be requested for more information. Versions 265/460V - 60Hz, special motors or special motor flanges are available on request.
In accordance with the Eco Design Directive 2009/125/EC, motors of less than 0.75 kW and motors designed for operation with variable speed are not subject to the IE3 standard.
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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