Magnetically Coupled Pumps
Magnetically coupled pumps, or magnetic drive pumps1, vary from the traditional pumping style, as the motor is coupled to the pump by magnetic means rather than by a direct mechanical shaft. The pump works via2a drive magnet, 'driving' the pump rotor, which is magnetically coupled to the primary shaft driven by the motor. They are often used where leakage of the fluid pumped poses a great risk (e.g., aggressive fluid in the chemical or nuclear industry, or electric shock - garden fountains). They have no direct connection between the motor shaft and the impeller, so no gland3is needed. There is no risk of leakage, unless the casing is broken. Since the pump shaft is not supported by bearings4 outside of the pump's housing5, support6 inside the pump is provided by bushings7. The materials of construction of these bushings and the required clearances8 of the parts may restrict the kinds of fluids for which this kind of pump may be used.
Advantages
- There are no drive seals9, therefore the risk of leaks is completely eradicated. This means that hazardous liquids can be pumped without spillages10.
- No heat transfer from the motor—the pump chamber is separated from the motor by an air gap; this provides a thermal barrier.
- Complete separation of the liquid means that liquid cannot seep into the motor from the pump.
- Reduced friction.
- Magnetic coupling11 can be broken—if the load of the pump is too great. By the magnetic coupling 'breaking', it means the pump does not overload and get damaged.
1. magnetic drive pump –насос с электромагнитным приводом
2. via –через
3. gland –сальник
4. bearing –подшипник
5. housing –кожух
6. support –опора
7. bushing –втулка, вкладыш
8. clearance –зазор
9. seal –сальник, сальниковое уплотнение
10. spillage –утечка, разбрызгивание
11. magnetic coupling –индуктивная связь, электромагнитная муфта
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Piston Diaphragm Pump1
The ABEL Piston Diaphragm Pump Range has been especially developed for operations with increased flow rates combined with high operating pressures. During the last 15 years we have constantly developed our products to comply with the latest challenges and requirements in the industry.
ABEL Piston Diaphragm Pumps are available as single or double-acting models2 as well as assuring an increased performance, reliable functionality and especially low operating and maintenance costs3. They can be utilized for flow rates up to 100 ml/h, and up to 10.0 MPa operation pressure. The ABEL Pumps are equipped with pre-formed membranes which remain stable throughout the duration of the pumping operations. The ABEL construction method has been tested in many various industries, as well as with very difficult media, and has been proved to be operationally secure as well as providing a very high membrane service life time. The parts of the pump which will come into contact with the materials to be pumped are made of nodular cast iron4 (also rubber-coated), polypropylene, cast steel or stainless steel.
This pump model has developed into the first choice product for critical process operations, such as spray dryer5 feeding or also for the transport of highly abrasive slurries6 containing heterogeneous grain sizes. When utilized as a filter press feed pump7 with a pressure sensor control, this piston diaphragm pump model is very energy efficient, has a long service life8 and a high operational capacity9.
1. piston diaphragm pump – поршневой (плунжерный) диафрагменный насос
2. double-acting models –модели двойного действия
3. operating and maintenance costs – эксплуатационные расходы
4. nodular cast iron –чугун с шаровидным графитом
5. spray dryer –струйная сушилка
6. abrasive slurry –абразивная суспензия, абразивная пульпа
7. feed pump –питательный насос
8. service life –срок службы
9. operational capacity – действующие мощности
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