Can a diaphragm pump be used as a circulating water pump?

　　Circulating water pumps are usually centrifugal pumps. Diaphragm pumps are like the principle of toadstool - like.

　　Ordinary circulating pump and diaphragm pump working principle, structural form are different, significant differences, should include centrifugal pumps do not have self-priming ability, while the diaphragm pump is there, so centrifugal pumps a lot of times to draw water; centrifugal pumps should be less noisy than the diaphragm pump, you can imagine that the diaphragm pump is a pulsating type of work; diaphragm pump drive is a compressed gas, centrifugal pumps and circulating pumps work is a rotary movement of most of the electric motors, Diesel engine can also be.

　　Diaphragm pump is a kind of pump, but its output is pulsating, generally used for dosing, etc., centrifugal pumps are generally rotating machinery, and the flow is stable.

　　Circulation pumps and diaphragm pumps in the nature of the seal.

　　Diaphragm pumps are able to transport media completely leak-free, from the media into the pump inlet to be discharged from the pump outlet, the pump structure is designed with no moving seals, the media and the atmosphere is separated by the diaphragm.

　　Circulating water pump must have a dynamic seal, sealing type has packing seal and mechanical seal. Both seals are inevitably leakage, packing seals, some mechanical seals are small.

　　At present, the circulating water pump with centrifugal pump more, but do not rule out some special circumstances can be replaced by a diaphragm pump.

　　Related articles: diaphragm pumps, circulating water pumps, oil pumps what is the difference between

　　Diaphragm vacuum pump is widely used in vacuum filtration, rotary evaporator, freezing, drying, vacuum concentration, molecular distillation and other research experiments, the series of products are well-designed, low noise, smooth operation, the highest vacuum value up to 700Kpa, strong pumping force, corrosion-resistant cavity, safe and reliable and other characteristics.

　　Circulating water vacuum pump in the vacuum pump on the basis of the laboratory area is small according to the characteristics of this, with reference to the Japanese desktop pump, a one-time molding shell, reduce the size of the improvement and become a small volume, light weight, beautiful appearance and so on, double-table, double-head pumping, four tables, four pumping, double-sided the same multi-purpose vacuum pumps, even if in the teacher's intuitive demonstration, the students can also be in any side of the boot, shutdown. The body adopts double pumping head, which can be used alone or in parallel with two vacuum tables. The host adopts stainless steel movement and corrosion-resistant material movement two types of manufacturing. Corrosion-resistant, non-polluting, low noise, easy to move, but also according to the user's needs to add a vacuum adjustment valve. Oil pump is a kind of lightweight and compact pump, there are three major categories: in-line, distribution and monoblock. The oil pump has to have a power source to operate, and its lower camshaft is driven by the engine crankshaft gear.

　　The oil pump proposes an oil pump having a housing made of an aluminum-containing material and a movable molded member provided in the housing, wherein the movable molded member is at least partially made of a sinterable, iron-based alloy comprising at least one austenite, and wherein the molded member made of the sinterable material has a coefficient of thermal expansion of at least 60% of the coefficient of thermal expansion of the housing.

　　Diaphragm vacuum pumps, circulating water pumps, oil pumps, these three vacuum pumps are for experimental instruments and equipment to extract vacuum, provide vacuum conditions, is the market pumping vacuum commonly used experimental instruments. So, what is the difference between these three?

　　1, the first circulating water pump medium is water, oil pump medium is oil (note that the vacuum pump special oil), diaphragm pumps do not use the medium, directly energized on the vacuum.

　　2, the full name of the circulating water pump is circulating water multi-purpose vacuum pump, desktop anticorrosive double table double pumping, two vacuum tables, two pumping head, can be used separately or in parallel, without affecting each other, and small size, beautiful appearance, is a lot of laboratory than the preparation of the instrument. The full name of the oil pump is rotary vane vacuum pump, rotary vane vacuum pump is also mostly small and medium-sized pumps. The full name of the diaphragm pump is diaphragm vacuum pump, no water, no oil, directly plugged into the vacuum can be vacuum, strong pumping force, corrosion-resistant cavity, safe and reliable, and most importantly, convenient and clean.

　　3, for three kinds of selection instructions, circulating water type multi-purpose vacuum pump (water pump) need to use water as the circulating medium, the precautions are, the water should not contain debris, otherwise the vacuum degree is not allowed. Rotary vane vacuum pump (oil pump) need to use oil as a medium, the precautions are, the pump can not enter the oil, the extracted instruments do not contain water, otherwise the pump is easy to bad, although the diaphragm vacuum pump is very convenient and clean, but the disadvantage is that the vacuum degree is relatively low, it can reach 700Kpa, the vacuum degree of the requirements of the choice can be careful, the precautions are, the diaphragm vacuum pump is suitable for pumping the dry instruments or utensils.