Mechanical Diaphragm Pumps
SEKO Spring MS1 Mechanical Diaphragm Metering Pump
Spring-return mechanical diaphragm pump, leak-free. Flow 5.5–1200 L/h, max 10 bar.
Max flow
5.5 – 1200 L/h
Max pressure
10 bar
Turndown / accuracy
—
Wetted materials
PVDF / PVC / SS316L · PTFE diaphragm
Protection
—
Power
—
Features
- Leak-free mechanical diaphragm
- Manual or electronic stroke control
- PVDF / PVC / SS316L heads; PTFE diaphragm
- Includes high-speed (232 spm) high-flow models
Specifications
| Flow | 5.5 – 1200 L/h |
| Max pressure | 10 bar |
| Motor power | 0.18 – 0.55 kW |
| Wetted parts | PVDF / PVC / SS316L · PTFE diaphragm |
| Brand | SEKO |
Applications
Materials & media
| Wetted parts | PVDF / PVC / SS316L · PTFE diaphragm |
Common chemicals: NaOCl, acids, alkalis, polymers — confirm compatibility when inquiring.
Controls & communication
Control options are listed in notes or confirmed on inquiry.
Models & specs
| Model | Flow | Pressure | SPM | Power | Weight | Tube | Notes | |
| MS1A064A | 5.5 L/h | 10 bar | 58 | 0.18 kW/4P | 15/13 kg | 1/4" GF / DN15 | diaphragm Ø64 mm · stroke 2 mm | |
| MS1A064B | 8 L/h | 10 bar | 78 | 0.18 kW/4P | 15/13 kg | 1/4" GF / DN15 | diaphragm Ø64 mm · stroke 2 mm | |
| MS1A064C | 11 L/h | 10 bar | 116 | 0.18 kW/4P | 15/13 kg | 1/4" GF / DN15 | diaphragm Ø64 mm · stroke 2 mm | |
| MS1A094A | 20 L/h | 10 bar | 58 | 0.25 kW/4P | 16/14 kg | 3/8" GF | diaphragm Ø94 mm · stroke 2 mm | |
| MS1A094B | 26 L/h | 10 bar | 78 | 0.25 kW/4P | 16/14 kg | 3/8" GF | diaphragm Ø94 mm · stroke 2 mm | |
| MS1A094C | 40 L/h | 10 bar | 116 | 0.25 kW/4P | 16/14 kg | 3/8" GF | diaphragm Ø94 mm · stroke 2 mm | |
| MS1B108A | 60 L/h | 10 bar | 58 | 0.37 kW/4P | 19/16 kg | 3/8" GF / DN15 | diaphragm Ø108 mm · stroke 4 mm | |
| MS1B108B | 80 L/h | 10 bar | 78 | 0.37 kW/4P | 19/16 kg | 3/8" GF / DN15 | diaphragm Ø108 mm · stroke 4 mm | |
| MS1B108C | 120 L/h | 10 bar | 116 | 0.37 kW/4P | 19/16 kg | 3/8" GF / DN15 | diaphragm Ø108 mm · stroke 4 mm | |
| MS1C138A | 155 L/h | 7 bar | 58 | 0.37 kW/4P | 23/18 kg | 3/4" GF / DN20 | diaphragm Ø138 mm · stroke 6 mm | |
| MS1C138B | 220 L/h | 7 bar | 78 | 0.37 kW/4P | 23/18 kg | 3/4" GF / DN20 | diaphragm Ø138 mm · stroke 6 mm | |
| MS1C138C | 310 L/h | 7 bar | 116 | 0.37 kW/4P | 23/18 kg | 3/4" GF / DN20 | diaphragm Ø138 mm · stroke 6 mm | |
| MS1C165A | 230 L/h | 5 bar | 58 | 0.37 kW/4P | 27/21 kg | 1" GF / DN25 | diaphragm Ø165 mm · stroke 6 mm | |
| MS1C165B | 330 L/h | 5 bar | 78 | 0.37 kW/4P | 27/21 kg | 1" GF / DN25 | diaphragm Ø165 mm · stroke 6 mm | |
| MS1C165C | 530 L/h | 4 bar | 116 | 0.37 kW/4P | 27/21 kg | 1" GF / DN25 | diaphragm Ø165 mm · stroke 6 mm | |
| MS1C138Q | 750 L/h | 4.5 bar | 232 | 0.55 kW/4P | 25/20 kg | 3/4" GF / DN20 | diaphragm Ø138 mm · high type W2 | |
| MS1C165Q | 1200 L/h | 2 bar | 232 | 0.55 kW/4P | 29/23 kg | 1" GF / DN25 | diaphragm Ø165 mm · high type W2 |
Dimensions & installation
Dimensional drawings available on request (CAD / PDF).
Downloads
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