Under what process conditions are barrel bag pumps used? What are the advantages and disadvantages?

Bucket bag pumps are suitable for the following process conditions: 1. Low-temperature processes: Bucket bag pumps can operate normally at low temperatures, such as for the transportation of low-temperature liquids like liquid oxygen and liquid nitrogen； 2. Special media: Bucket bag pumps can handle certain special media, such as liquids containing particles and corrosive liquids. The advantages of bucket bag pumps include: 1. Simple and easy operation: Bucket bag pumps are usually operated manually or via built-in compressed air supply, making them simple to use without the need for electric power. 2. Cost savings: Compared to other types of pumps, bucket bag pumps have relatively lower costs, as well as lower maintenance and replacement expenses. 3. Safe and reliable: The barrel bag pump has a simple structure with no moving parts, resulting in a low failure rate and making it safe and reliable to use. The disadvantages of bucket bag pumps include: 1. Limited conveying capacity: Bucket bag pumps have a low conveying capacity, resulting in a limited range of applications. 2. Dependence on compressed air: Bucket pump requires an external supply of compressed air; if this supply is unstable or interrupted, it will affect the proper operation of the bucket pump. 3. Unable to operate continuously for long periods: Bucket pump systems generally require intermittent operation and cannot run continuously for extended periods, making them suitable for transporting small quantities of material. .

“2. Special media: Bucket bag pumps can handle certain special media, such as liquids containing particles and corrosive liquids. ”Is there some special structure? Why rely on compressed air?

For some liquids containing particulate matter or corrosive liquids, bucket pump systems typically use bag filters made of special materials or rubber sleeves to handle them. Bag filters can effectively remove particulate matter, preventing blockages in the pump or damage to its components ； Rubber sleeves can protect against the erosion of corrosive liquids, thereby extending the pump’s service life. A bucket bag pump relies on compressed air because it operates on pneumatic principles. A barrel bag pump has a pneumatic motor that uses the thrust generated by compressed air to drive the pump to operate. Compressed air is controlled by a pneumatic valve, which enables the pump to be turned on, off, and to have its flow rate adjusted. The supply of compressed air can be provided through an external compressed air system or manually. Its design based on compressed air makes the bucket pump simpler, safer, and more reliable, and it is not dependent on an electric power supply. .

Then what you’re referring to must be a bag pump powered by compressed air; I’ve never seen one before. All those I’ve seen are motor-driven

Use when the net positive suction head is low

Mainly used for liquefied gas and volatile media； Tubular bag pumps operate stably and are easy to use, but they are inconvenient to disassemble for maintenance and have a high price

Is it true that medium temperatures and volatile substances are generally used more often?