| 1. | A diaphragm pump uses a diaphragm to pump a fluid.
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| 2. | For larger scale extractions, diaphragm pumps are most common.
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| 3. | Diaphragm pumps can also be made which discharge at fairly high pressure.
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| 4. | LEWA applied for a patent for the " sandwich diaphragm " for diaphragm pumps in 1968.
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| 5. | Slow diaphragm pumps use a large diaphragm operated by a cam or lever to generate suction with each stroke.
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| 6. | Fast diaphragm pumps use a diaphragm that is acted on by a lever, with thousands of cycles per minute.
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| 7. | Diaphragm pumps have a "'diaphragm "'through which repeated compression / decompression motion is transmitted.
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| 8. | Diaphragm pumps have the advantage that they pump relatively lightly due to the lack of pulling rods and are corrosion resistant.
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| 9. | Because this is usually complicated and costly, diaphragm pumps operating in poor rural areas are often abandoned once the diaphragm wears out.
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| 10. | In electric diaphragm pumps, the motor drives a hydraulic piston pump that transmits the oil displaced by the piston, to move the diaphragm.
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