Spring MSA Mechanical Diaphragm Pump
- Flow range: 10-120 L/h, max. pressure 5 bar
- Wetted materials: PVC, SS316L (pump head), PTFE (diaphragm), EPDM or FPM (seals), and ceramic & stainless steel (valve balls)
- MSA is a new member of our Spring series. It is a mechanical diaphragm pump with stable operation, high efficiency and excellent cost-effectiveness, featuring a spring-return mechanical device and PPS housing.
- MSA adopts a built-in dual-cam mechanical structure, ensuring stable and quiet operation with efficient and precise dosing. The housing material offers excellent resistance to acid and alkali corrosion and outstanding high-temperature creep resistance.
- MSA is a classic product that balances cost investment and quality assurance, developed based on actual market demands.
| Performance Features | |
| Flow rate | 10-120 L/h |
| Max. pressure | 5 bar |
| Stroke frequency | 30-50-100-150-166 strokes/min |
| Diaphragm diameter | 70 mm |
| Motor | Standard power 0.18-0.25 KW (IP55) |
| Stroke length | 4-5-7 mm |
| Max. medium temperature | 40℃ |
Technical Specifications:
| Model | Diaphragm diameter [mm] | Stroke length [mm] | Stroke frequency [strokes/min] |
Flow rate [L/h] |
Max. pressure [bar] | Connection type |
Motor [KW/pole] |
Weight [kg] | Carton dimensions | |||||
| SS316L | PVC | SS316L | PVC | SS316L | PVC | L x W x H [mm] | ||||||||
| MSAF070P | 70 | 4 | 30 | 10 | 5 | 5 | 3/8" GF | 8X12 (standard) DN15 (optional) |
0.06/4 (X) | 11 | 8 | 430X280X370 | ||
| MSAF070O | 50 | 20 | ||||||||||||
| MSAF070N | 100 | 40 | ||||||||||||
| MSAF070M | 150 | 60 | ||||||||||||
| MSAF070R | 5 | 166 | 90 | |||||||||||
| MSAH070R | 7 | 120 | 3 | 3 | ||||||||||
Model Code:
| Model | ||||||||||
| M | Diaphragm pump | |||||||||
| Mechanical device type | ||||||||||
| SA | ||||||||||
| Stroke length [mm] | ||||||||||
| F | 5 | |||||||||
| Diaphragm diameter [mm] | ||||||||||
| 070 | 70 | |||||||||
| Stroke frequency (strokes/min) | ||||||||||
| M | 150 | |||||||||
| N | 100 | |||||||||
| O | 50 | |||||||||
| P | 30 | |||||||||
| R | 166 | |||||||||
| Wetted end | Pump head | Valve ball | Diaphragm | Seals | ||||||
| 21 | SS316L | SS316L | PTFE | FPM | ||||||
| 24 | SS316L | SS316L | PTFE | EPDM | ||||||
| 31 | PVC | Ceramic | PTFE | FPM | ||||||
| 34 | PVC | Ceramic | PTFE | EPDM | ||||||
| Motor | Power | Voltage | ||||||||
| XT | 0.18-3ph | 380Vac/50Hz | ||||||||
| XD | 0.25-1ph | 220Vac/50Hz | ||||||||
| Stroke adjustment | ||||||||||
| 0 | Manual adjustment knob | |||||||||
| Customized | ||||||||||
| 8 | Standard | |||||||||
| Optional | ||||||||||
| 0 | Standard | |||||||||
| M | SA | F | 070 | M | 31 | XT | 0 | 8 | 0 | |
Case Studies
Municipal Wastewater Treatment · SPRING MSA — Application Case
Application Context
the inlet, biological and outlet stages of a municipal plant is a typical Municipal Wastewater Treatment duty. The project started from SPRING MSA, focusing on mechanical multi-head dosing with SPRING MSA.
Process Constraints
effluent parameters drift and probes foul with sludge and biofilm, and high solids and corrosive fractions, with large diurnal flow swings only amplify it. The SPRING MSA specification must therefore cover configured by head count, individual flow rates and interlocking.
Delivery Approach
Delivery was handled as the mechanical diaphragm series — selecting for mechanically driven continuous dosing. Execution centred on configured by head count, individual flow rates and interlocking, together with stable compliance with Grade 1A discharge limits and online data reporting.
Field Results
Operation shows the benefit clearly — one unit dosing several lines, saving cabinet space, with confidence in this measuring point improving markedly.
Food & Beverage · SPRING MSA — Application Case
Customer Profile
The typical setting in Food & Beverage is dosing, pasteurising, filling and CIP stages. The measuring point is SPRING MSA; the focus is mechanical multi-head dosing with SPRING MSA.
Key Difficulties
Conditions are syrups, dairy and beverages that scale easily, under strict hygienic requirements and, on top of that, frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, which a standard configuration cannot handle for long. The design therefore starts with configured by head count, individual flow rates and interlocking.
Implementation
The scope ran through the mechanical diaphragm series: selecting for mechanically driven continuous dosing. Technically it hinges on configured by head count, individual flow rates and interlocking, and on these requirements: food-safety and hygienic design per 3-A / EHEDG.
Customer Benefit
In practice this means one unit dosing several lines, saving cabinet space, which cut the workload on the site maintenance team.
Chemical & Pharmaceutical · SPRING MSA — Application Case
Project Background
The project covers reactors, metering vessels and finished-product tanks. The work centres on SPRING MSA and the core task is mechanical multi-head dosing with SPRING MSA.
Operating Challenges
The medium and duty are characterised by highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. So SPRING MSA cannot be specified generically — it calls for configured by head count, individual flow rates and interlocking.
Solution
The Ainstru engineering team worked through the mechanical diaphragm series: selecting for mechanically driven continuous dosing. The configuration involves configured by head count, individual flow rates and interlocking, with these requirements in view: Ex certification and GMP traceability of records.
Results
Since start-up the system has run steadily; the practical result is one unit dosing several lines, saving cabinet space.
Power & Energy · SPRING MSA — Application Case
Project Overview
The site is boiler feedwater, turbine condensate and FGD/DeNOx systems. The customer wanted SPRING MSA properly configured on the existing plant, with the aim of mechanical multi-head dosing with SPRING MSA.
Technical Challenges
What actually causes trouble is high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. All of this means the SPRING MSA configuration has to involve configured by head count, individual flow rates and interlocking.
Configuration
Supply and installation were organised through the mechanical diaphragm series: selecting for mechanically driven continuous dosing. On site this meant configured by head count, individual flow rates and interlocking, checked line by line against: compliance with power-industry codes and unit availability targets.
Performance
After commissioning the outcome is one unit dosing several lines, saving cabinet space, and the readings are now used for process tuning.