Vacuum pumps are commonly used for circulating water

This product uses circulating water as the working fluid,A new type of multi-purpose vacuum pump designed based on the principle of negative pressure generated by jet flow,This pump is divided into two types: stainless steel pump and plastic pump.Provide vacuum conditions for chemical laboratories,And can provide circulating cooling water to the reaction device.Widely used for evaporation,distillation,crystallization,filter,Sublimation and other assignments.It's a college,Medical Chemical Engineering,Ideal equipment for laboratories in fields such as food processing.

1.Significant water-saving effect.Due to the use of water cycle operation,The water added to the water tank can be used in a cyclic manner,Overcoming the phenomenon of wasting a large amount of water when obtaining vacuum by directly flushing tap water.Through actual testing,Calculated based on continuous work for one working day,Under the same vacuum conditions,Using this product can save water8Over tons,And adding water once can be used for a long time,This is particularly applicable in laboratories with insufficient water sources or water pressure.
2.Multi functional comprehensive use.This machine can provide vacuum conditions,It can also perform automatic water circulation simultaneously,Provide circulating cooling water for the reaction device.Connect the machine to the incoming water source,By supplementing the water source appropriately, it is possible to operate continuously for a long time,Keep the temperature of the circulating water constant,It can ensure that the vacuum degree does not decrease,It can also achieve the supply of circulating cooling water.
3.novel design,easy to use.The pump head of this machine is directly immersed in water,No water kettle installed,The overall height of the machine is relatively low,compact size,lightweight,Easy to move,Can be placed on the workbench,Easy to operate and observe.The upper cover of the water tank is a movable installation,Can be opened,Easy to add water and conduct maintenance.
4.This machine is equipped with two exhaust nozzles,Can be operated separately or simultaneously for air extraction,Each exhaust nozzle is equipped with an exhaust meter,It is convenient to observe the vacuum degree.There is a check valve installed on the exhaust passage,Can prevent circulating water from flowing back into the evacuated equipment when the vacuuming operation is stopped.
5.corrosion-resistant,pollution-free.The water pump components of this machine are made of stainless steel,The water tank isABSplastic,One time forming is not affected by corrosive substances such as acid and alkali,At the same time, there is no pollution such as oil stains in the laboratory.
6.The machine works stably and reliably,low noise.

真空度：-0.098mpa(Circulating water temperature)0~25Degree) pump delivery:60L/min
Single nozzle pumping rate:10L/minElectric motor power:180W
Working voltage:~220V +10% 50HZWater tank capacity:15L
Noise:<45DBLift:8rice
dead weight:15kg
Instructions for use
1.preparation.Place the machine flat on the workbench,When first used,Open the top cover of the water tank,Inject clean cold water(Water can also be added through a drain hose)Stop adding water when the water level is about to rise to the height of the overflow nozzle behind the water tank,Repeatedly turning on the device will no longer require adding water.
`2.Vacuum pumping operation.Tightly connect the suction sleeve of the equipment that needs to be evacuated to the suction nozzle of this machine,Check the shape of the circulating water,The switch should be turned off.Connect the power switch,You can start the vacuum pumping operation now,The vacuum degree can be observed through the vacuum gauge corresponding to the suction nozzle.
3.When the machine needs to operate continuously for a long time,The water temperature inside the water tank will rise,Affects vacuum degree.at this moment,Can connect the drain hose to the water source(tap water)Jiedao,Overflow spout as drainage outlet,Properly control the flow of tap water,It can keep the water temperature in the tank from rising,Stabilize the vacuum degree.
4.When it is necessary to provide secondary cooling circulating water for the reaction device,At the front3On the basis of the operation, the water inlet of the device that needs to be cooled will be adjusted,The water outlet pipes are respectively connected to the circulating water pressure nozzles at the rear of the machine,On the inlet nozzle,Rotary circulating water switch,It can achieve the supply of circulating cooling water.

Common faults and troubleshooting methods
（1） Low vacuum degree:
1. There are foreign objects inside the vacuum bottle, clean them up
2. If the thread at the connection between the two sections of the vacuum bottle is loose, tighten it by hand
3. There are foreign objects inside the check valve, remove and clean them
4. The inlet under the pump head is blocked, just clean it up
（2） Vacuum gauge not moving or jumping:
1. The vacuum gauge does not move, which may be caused by the blockage of the rear air hole of the vacuum gauge. Remove the vacuum gauge and clean it
2. If the needle jumps, it indicates that the check valve or vacuum bottle is leaking air. The check valve should be cleaned and the screw thread at the connection between the two sections of the vacuum bottle should be tightened
（3） Abnormal motor startup
1. The motor does not start, which may be caused by the power not being connected or the fuse wire being disconnected
After the motor is connected, if it makes a buzzing sound and does not start, the power should be immediately cut off, and then the fan inside the motor cover should be manually turned a few times
（4） Attention:
Do not let the pump head idle for a long time away from the water to avoid wear on the mechanical seal. The motor should be well grounded, and the circulating water should be kept clean to prevent blockage of the vacuum pump