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The condensate trickles through the inlet opening (1) and collects in the container (2). Initially, the valve is closed as, via the pilot supply line (3) and the solenoidvalve (4), pressure differential above the membrane (5) is effected. The larger surface area above the membrane results in a high closing force. The membrane seat remains closed and leak-proof. When the container is filled with condensate, so that the capacitive level sensor (6) gets a signal at the maximum point, the solenoid valve switches over and the area above the membrane is vented. As a result of the decreasing pressure above the membrane, the membrane lifts off the membrane seat (7) and the overpressure in the housing forces the condensate into the discharge pipe (8). |
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① Inlet Opening ② Container ③ Pilot Supply Line ④ Solenoid Valve ⑤ Membrane ⑥ Capacitive Level Sensor ⑦ Membrane Seat ⑧ Discharge Pipe
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Diagram 1 |
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With the increasing volume of the condensate in the container②, when the surface reaches to high level (Ni2), the capacitive level sensor⑥ would signal and the pilot-operated solenoid valve④ would actuate to close the pilot-operated controlled gas line③. It simultaneously relieves the pressure ( to atmospheric pressure) from the top of the diaphragm valve⑤, and the bottom of the diaphragm valve⑤ is still the system pressure. Therefore, the pressure at the bottom is higher than the pressure on the top, causing the diaphragm valve disc being pushed at the bottom away from the base of solenoid valve⑦ by the condensate. The condensate is then exhausted from the discharge passage⑧ due to the pressure in the container. At this time, the control system of the FA Automatic Electric Drain calculates the dropping speed to low level (Ni1), and figures the exact timing to open the diaphragm valve. Before the leakage of the compressed air, it would close the pilot-operated solenoid valve④. The system pressure is then back on the top of the diaphragm valve to close the diaphragm valve⑤ tightly in time. See Diagram 2.
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Diagram 2 |
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A type Tech. Spec.
| Northern Europe, Canada, North America and Central Asia, north China Heilongjiang region | |||
| Product Selection | Compressor region max. capacity m³/ min |
Freeze dryer area max. capacity m³/ min |
Filter area max. capacity m³/ min |
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FA11
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3 | 6 | 30 |
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FA12
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7 | 14 | 70 |
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FA13
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12 | 24 | 120 |
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FA13H
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12 | 24 | 120 |
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FA 21
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8 | 16 | 80 |
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FA 21H
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8 | 16 | 80 |
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FA 31
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35 | 70 | 350 |
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FA 31H
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35 | 70 | 350 |
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FA 51
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150 | 300 | 1500 |
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FA 51H
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150 | 300 | 1500 |
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FA 81H
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1700 | 3400 | |
| Remarks： unique requirements acceptable customization | |||
