A standard vacuum pump designed for evacuation and dehydration can be used as a recovery device only when used with what configuration?

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Multiple Choice

A standard vacuum pump designed for evacuation and dehydration can be used as a recovery device only when used with what configuration?

The key idea is that a vacuum pump pulls refrigerant vapor into a receiver by creating low pressure. That works best when the receiving container is at atmospheric pressure—a non-pressurized container—so the pump’s suction can move the vapor into it without fighting against internal pressure. If the container is pressurized, sealed, or otherwise not at low pressure, the pressure inside resists entry, making recovery inefficient or unsafe and potentially stressing the equipment. A water-filled container isn’t appropriate as a refrigerant receiver and would complicate handling and separation. So, the setup must be a non-pressurized container to allow proper vapor capture.

The key idea is that a vacuum pump pulls refrigerant vapor into a receiver by creating low pressure. That works best when the receiving container is at atmospheric pressure—a non-pressurized container—so the pump’s suction can move the vapor into it without fighting against internal pressure. If the container is pressurized, sealed, or otherwise not at low pressure, the pressure inside resists entry, making recovery inefficient or unsafe and potentially stressing the equipment. A water-filled container isn’t appropriate as a refrigerant receiver and would complicate handling and separation. So, the setup must be a non-pressurized container to allow proper vapor capture.

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