Item Description
Working basic principle
The vacuum in dry screw pumps is developed via 2 parallel-organized screw rotors that rotate in reverse directions. These rotors entice the gasoline coming in by way of the inlet and produce it to the gasoline discharge or stress facet. As the gas is receiving compressed, there is no make contact with among the rotors. This does away with any need for the compression chamber to have any working fluids or lubrication.
The lubricant utilised to lubricate the gears and shaft seal is sealed in the gearbox by the shaft seal. The pump can be cooled possibly directly by circulating cooling drinking water or by a cooling unit with enthusiast and radiator.
The dry screw vacuum pump adopts a special rotor pitch design, when compared with the normal rotor pitch style, decrease the power usage by about 30%, the temperature increase of the exhaust end is diminished by about one hundred ºC, the reliability and steadiness of the operation of the item is tremendously enhanced, can be appropriate for any working conditions of vacuum.
The dry screw pumps can be commonly employed in solvent recovery, vacuum drying, concentration, crystallization, distillation and other procedures in the chemical and pharmaceutical industries, vacuum extrusion and molding in the plastic and rubber industries, vacuum degassing in the metallurgical business vacuum degassing and drying in the photo voltaic vitality, microelectronics, lithium battery and other industries.
Pump body and end caps: large-power solid iron.
Pump human body and end caps: large strength forged iron.
Screw rotor: ductile cast iron.
Anti-corrosion coating: corrosion-resistant Hastelloy.
Synchronous gears: alloy metal.
Radial lip seal: imported PTFE mixture or
high-temperature resistant fluorine rubber
Seal bushings: stainless metal surface area protected with ceramic.
Movement chart
Main functions
one. The screw rotor is designed with variable pitch construction, the supreme vacuum can attain beneath 1Pa, which can fulfill all sorts of vacuum processing from environment to substantial vacuum.
2. Oil free of charge - Adapt to various specific operating circumstances for reliable use.
three. It can operate reliably in the stress assortment from environment to a number of Pa.
4. No friction in between shifting components, easy construction, reduced procedure and upkeep cost.
5. Nitrogen seal and CZPT seal layout is optional, which has the advantage of very good reliability, lower value of use, straightforward routine maintenance.
6. The rotor is dynamically balanced at high pace and the motor is linked by flange, with large concentricity, lower vibration and reduced sounds.
7. Hastelloy anti-corrosion coating is optional for rotor floor, condensable materials is not simple to condense in the pump cavity, better corrosion resistance.
eight. When compared with oil seal pump, liquid ring pump, there is no squander fuel, no waste liquid, no waste oil emission, vitality saving and environmental pleasant.
It can be employed alone or with Roots vacuum pump, air-cooled Roots vacuum pump, molecular vacuum pump, etc. to acquire an oil-free substantial vacuum technique.
The advantage of dry screw vacuum pump when compared to liquid ring vacuum pump:
-Shorten the procedure cycle and improve generation performance
-Lessen water consumption
-Save energy
-Improve product good quality
-Can recuperate solvent by lowering the drying time of merchandise
-Minimize the value of wastewater and waste gasoline remedy
A Circumstance in a pharmaceutical manufacturing facility
Process introduction:The penicillin sodium salt answer is fed into the crystallization tank by means of vacuum. By steam heating, agitator stirring, and incorporating butanol, the drinking water and butanol in the penicillin resolution are pumped into the condenser and condensed into the liquid amassing tank, which can be reused.
Process demands:
one. The volume of crystallization tank is 7.5mthree, and about 4.5m3 penicillin resolution is additional in the procedure.
two. Just before moving into the crystallization tank, the drinking water content material of penicillin resolution is about 20%, and after crystallization, the h2o articles is essential to be about 1%.
3. Vacuum feeding for 2h, then introducing butanol for 30min, and then starting up to crystallize. The method requires minimal temperature and quickly speed, and the decrease the temperature, the much better the quality of penicillin. The shorter the reaction time, the much better.
4. Vacuum diploma demands: the vacuum degree shall be stored earlier mentioned -.097MPa. Large vacuum degree can decrease the reaction temperature and shorten the response time.
The earlier vacuum system was 2BE1252+air ejector, which is now remodeled into a dry screw vacuum pump. The comparison table of examination info is as follows:
| vacuum system | 2BE1252+ejector | DVP 1600 screw pump |
| Feeding time (h) | two | 1.five |
| Liquid temperature at the starting of crystallization (ºC) | 31.five | sixteen.6 |
| Crystallization time (h) | six | 4.5 |
| Time from crystallization to liquid coming out (min) | thirty | fifteen |
| Crystal quality | common | great |
| Energy use (KW) | forty five | 37 |
| H2o consumption (m3) | 26.4 | .seventy two |
Financial benefit evaluation:
| Price saving(USD) | Remark | |
| Drinking water consumption and therapy | one hundred thirty | Drinking water price: $.65/mthree, drinking water remedy: thirty/mthree |
| Power | 15 | $.15/Kwh |
| Labor, manufacturing effectiveness | forty three | Decreased from 6 hour to 4.5 hour |
| Sum up | 188 |
You should get in touch with us for a in depth report of economic gain investigation for your applications!
Configuration
Normal configuration:
Device base, pump head, coupling, motor, driving screen, air inlet connector, check valve, vacuum gauge, manual filling valve exhaust port muffler.
Optional add-ons:
Inlet filter, inlet condenser, solvent flushing device, nitrogen purging unit, nitrogen sealing system, exhaust port condenser, solenoid filling valve, cooling water movement change, temperature sensor, strain transmitter.
Apps
| Leak Detection | Metallurgy | Industrial furnace | Lithium Battery |
| Chemical, pharmaceutical | Wind tunnel test | Electricity Business | Vacuum coating |
| Microelectronics industry | Drying Process | Packaging and Printing | Solar Power |
| Exhaust fuel recovery |
Merchandise Parameters
Technological information of Variable pitch Dry screw vacuum pump
| Spec. Design |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor score (50Hz) | Nominal motor speed (50Hz) | Sound level Lp | Optimum cooling h2o essential |
Suction Relationship dimension | Discharge Link measurement | Bodyweight (Without having Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DVP-one hundred eighty | 181 | two | four | 2900 | 82 | eight | fifty | 40 | 280 |
| DVP-360 | 354 | two | seven.5 | 2900 | eighty three | ten | 50 | forty | 400 |
| DVP-540 | 535 | two | 11 | 2900 | eighty three | ten | 50 | forty | five hundred |
| DVP-650 | 645 | one | fifteen | 2900 | 84 | twenty | 65 | fifty | 600 |
| DVP-800 | 780 | 1 | 22 | 2900 | 86 | thirty | 100 | 80 | 800 |
| DVP-1600 | 1450 | 1 | 37 | 2900 | 86 | 40 | 125 | a hundred | 1200 |
Specialized information of Constant pitch Dry screw vacuum pump
| Spec. Product |
Nominal pumping velocity(50Hz) | Supreme stress | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Sound level Lp | Optimum cooling h2o essential |
Suction Relationship measurement | Discharge Relationship dimension | Excess weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DSP-140 | 143 | five | four | 2900 | 82 | ten | fifty | forty | 240 |
| DSP-280 | 278 | five | seven.5 | 2900 | 83 | twenty | 50 | forty | 350 |
| DSP-540 | 521 | 5 | fifteen | 2900 | 83 | thirty | 65 | fifty | 550 |
| DSP-650 | 617 | five | 18.five | 2900 | eighty four | 45 | sixty five | 50 | 630 |
| DSP-720 | 763 | five | 22 | 2900 | 85 | 55 | eighty | eighty | 780 |
| DSP-a thousand | 912 | five | 30 | 2900 | 86 | 70 | 100 | 80 | 880 |
Note: The cooling drinking water quantity of the dry screw vacuum pump provided in the desk is the amount beneath 20ºC place temperature drinking water. When the dry screw vacuum pump utilizes cooling gadget, the cooling h2o will be improved, the big difference of inlet and outlet water temperature is usually managed below 7ºC is suitable.
Dimension
FAQ
Q: What info must I supply for an inquiry?
A: You can inquire based mostly on the model immediately, but it is constantly advisable that you get in touch with us so that we can help you to check if the pump is the most appropriate for your application.
Q: Can you make a personalized vacuum pump?
A: Of course, we can do some special styles to meet up with consumer purposes. These kinds of as customized sealing methods, speical area treatment can be utilized for roots vacuum pump and screw vacuum pump. You should contact us if you have specific needs.
Q: I have problems with our vacuum pumps or vacuum programs, can you supply some support?
A: We have application and design and style engineers with far more than 30 several years of encounter in vacuum purposes in diverse industries and assist a lot of clients take care of their troubles, this kind of as leakage concerns, strength-saving solutions, far more environment-friendly vacuum systems, and many others. Please make contact with us and we'll be extremely content if we can supply any support to your vacuum technique.
Q: Can you design and style and make personalized vacuum systems?
A: Sure, we are very good for this.
Q: What is your MOQ?
A: 1 piece or 1 established.
Q: How about your shipping time?
A: 5-ten doing work days for the regular vacuum pump if the quantity is beneath 20 items, twenty-thirty functioning days for the conventional vacuum program with significantly less than 5 sets. For far more quantity or specific demands, please contact us to verify the lead time.
Q: What are your payment terms?
A: By T/T, 50% progress payment/deposit and fifty% compensated just before shipment.
Q: How about the warranty?
A: We provide 1-yr warranty (apart from for the wearing parts).
Q: How about the services?
A: We supply remote video technical assist. We can deliver the provider engineer to the site for some special requirements.
|
US $21,000-23,000 / Piece | |
1 Piece (Min. Order) |
###
| After-sales Service: | Online Video Instruction |
|---|---|
| Warranty: | 1 Year |
| Nominal Pumping Speed(50Hz): | 780 M3/H |
| Ultimate Pressure: | 1 PA |
| Nominal Motor Rating(50Hz): | 22 Kw |
| Nominal Motor Speed(50Hz): | 2900 Rpm |
###
| vacuum system | 2BE1252+ejector | DVP 1600 screw pump |
| Feeding time (h) | 2 | 1.5 |
| Liquid temperature at the beginning of crystallization (ºC) | 31.5 | 16.6 |
| Crystallization time (h) | 6 | 4.5 |
| Time from crystallization to liquid coming out (min) | 30 | 15 |
| Crystal quality | average | good |
| Power consumption (KW) | 45 | 37 |
| Water consumption (m3) | 26.4 | 0.72 |
###
| Cost saving(USD) | Remark | |
| Water consumption and treatment | 130 | Water cost: $0.65/m3, water treatment: 30/m3 |
| Power | 15 | $0.15/Kwh |
| Labor, production efficiency | 43 | Reduced from 6 hour to 4.5 hour |
| Sum up | 188 |
###
| Leak Detection | Metallurgy | Industrial furnace | Lithium Battery |
| Chemical, pharmaceutical | Wind tunnel test | Power Industry | Vacuum coating |
| Microelectronics industry | Drying Process | Packaging and Printing | Solar Energy |
| Exhaust gas recovery |
###
| Spec. Model |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Noise level Lp | Maximum cooling water required |
Suction Connection size | Discharge Connection size | Weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DVP-180 | 181 | 2 | 4 | 2900 | 82 | 8 | 50 | 40 | 280 |
| DVP-360 | 354 | 2 | 7.5 | 2900 | 83 | 10 | 50 | 40 | 400 |
| DVP-540 | 535 | 2 | 11 | 2900 | 83 | 10 | 50 | 40 | 500 |
| DVP-650 | 645 | 1 | 15 | 2900 | 84 | 20 | 65 | 50 | 600 |
| DVP-800 | 780 | 1 | 22 | 2900 | 86 | 30 | 100 | 80 | 800 |
| DVP-1600 | 1450 | 1 | 37 | 2900 | 86 | 40 | 125 | 100 | 1200 |
###
| Spec. Model |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Noise level Lp | Maximum cooling water required |
Suction Connection size | Discharge Connection size | Weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DSP-140 | 143 | 5 | 4 | 2900 | 82 | 10 | 50 | 40 | 240 |
| DSP-280 | 278 | 5 | 7.5 | 2900 | 83 | 20 | 50 | 40 | 350 |
| DSP-540 | 521 | 5 | 15 | 2900 | 83 | 30 | 65 | 50 | 550 |
| DSP-650 | 617 | 5 | 18.5 | 2900 | 84 | 45 | 65 | 50 | 630 |
| DSP-720 | 763 | 5 | 22 | 2900 | 85 | 55 | 80 | 80 | 780 |
| DSP-1000 | 912 | 5 | 30 | 2900 | 86 | 70 | 100 | 80 | 880 |
|
US $21,000-23,000 / Piece | |
1 Piece (Min. Order) |
###
| After-sales Service: | Online Video Instruction |
|---|---|
| Warranty: | 1 Year |
| Nominal Pumping Speed(50Hz): | 780 M3/H |
| Ultimate Pressure: | 1 PA |
| Nominal Motor Rating(50Hz): | 22 Kw |
| Nominal Motor Speed(50Hz): | 2900 Rpm |
###
| vacuum system | 2BE1252+ejector | DVP 1600 screw pump |
| Feeding time (h) | 2 | 1.5 |
| Liquid temperature at the beginning of crystallization (ºC) | 31.5 | 16.6 |
| Crystallization time (h) | 6 | 4.5 |
| Time from crystallization to liquid coming out (min) | 30 | 15 |
| Crystal quality | average | good |
| Power consumption (KW) | 45 | 37 |
| Water consumption (m3) | 26.4 | 0.72 |
###
| Cost saving(USD) | Remark | |
| Water consumption and treatment | 130 | Water cost: $0.65/m3, water treatment: 30/m3 |
| Power | 15 | $0.15/Kwh |
| Labor, production efficiency | 43 | Reduced from 6 hour to 4.5 hour |
| Sum up | 188 |
###
| Leak Detection | Metallurgy | Industrial furnace | Lithium Battery |
| Chemical, pharmaceutical | Wind tunnel test | Power Industry | Vacuum coating |
| Microelectronics industry | Drying Process | Packaging and Printing | Solar Energy |
| Exhaust gas recovery |
###
| Spec. Model |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Noise level Lp | Maximum cooling water required |
Suction Connection size | Discharge Connection size | Weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DVP-180 | 181 | 2 | 4 | 2900 | 82 | 8 | 50 | 40 | 280 |
| DVP-360 | 354 | 2 | 7.5 | 2900 | 83 | 10 | 50 | 40 | 400 |
| DVP-540 | 535 | 2 | 11 | 2900 | 83 | 10 | 50 | 40 | 500 |
| DVP-650 | 645 | 1 | 15 | 2900 | 84 | 20 | 65 | 50 | 600 |
| DVP-800 | 780 | 1 | 22 | 2900 | 86 | 30 | 100 | 80 | 800 |
| DVP-1600 | 1450 | 1 | 37 | 2900 | 86 | 40 | 125 | 100 | 1200 |
###
| Spec. Model |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Noise level Lp | Maximum cooling water required |
Suction Connection size | Discharge Connection size | Weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DSP-140 | 143 | 5 | 4 | 2900 | 82 | 10 | 50 | 40 | 240 |
| DSP-280 | 278 | 5 | 7.5 | 2900 | 83 | 20 | 50 | 40 | 350 |
| DSP-540 | 521 | 5 | 15 | 2900 | 83 | 30 | 65 | 50 | 550 |
| DSP-650 | 617 | 5 | 18.5 | 2900 | 84 | 45 | 65 | 50 | 630 |
| DSP-720 | 763 | 5 | 22 | 2900 | 85 | 55 | 80 | 80 | 780 |
| DSP-1000 | 912 | 5 | 30 | 2900 | 86 | 70 | 100 | 80 | 880 |
Types of vacuum pumps
A vacuum pump is a device that draws gas molecules from a sealed volume and maintains a partial vacuum. Its job is to create a vacuum in a volume, usually one of several. There are several types of vacuum pumps, such as root pumps, diaphragm pumps, rotary piston pumps, and self-priming centrifugal pumps.
The diaphragm pump is a dry positive displacement vacuum pump
Diaphragm pumps are a versatile type of vacuum pump. They can be installed in a variety of scenarios including container emptying, positive suction, and simultaneous fluid mixing. Their performance depends on the stiffness and durability of the diaphragm, which in turn depends on the material.
They have good performance when running in dry mode. Diaphragm pumps work very similarly to the human heart, which is why they are often used to create artificial hearts. In addition, the diaphragm pump is self-priming and has high efficiency. They are also capable of handling the most viscous liquids and are used in almost all industries.
However, this type of pump has several disadvantages. One of them is that they are difficult to restart after a power outage. Another disadvantage is that they can generate a lot of heat. Fortunately, this heat is carried away by airflow. However, this heat builds up in the multistage pump. If this happens, the diaphragm or motor may be damaged. Diaphragm pumps operating in two or more stages should be fitted with solenoid valves to maintain vacuum stability.
Diaphragm pumps are a good choice for drying processes where hygiene is important. These pumps have check valves and rubber or Teflon diaphragms. Diaphragm pumps are also ideal for high viscosity applications where shear sensitivity is important. 
Roots pumps are dry method centrifugal pumps
Roots pumps use a vane rotor pump with two counter-rotating vanes that move in opposite directions to move the gas. They are often the first choice for high-throughput process applications. Depending on the size and number of blades, they can withstand up to 10 Torr.
Centrifugal pumps have several advantages, including the ability to handle corrosive fluids and high temperatures. However, when choosing a pump, it is essential to choose a reputable manufacturer. These companies will be able to advise you on the best pump design for your needs and provide excellent after-sales support. Roots pumps can be used in a wide range of industrial applications including chemical, food, and biotechnology.
The Roots pump is a dry centrifugal pump whose geometry enables it to achieve high compression ratios. The screw rotors are synchronized by a set of timing gears that allow gas to pass in both directions and create a compressed state in the chamber. The pre-compressed gas is discharged through a pressure connection and cooled with water. Some pumps are also able to accept additional cooling gas, but this should be done with caution.
The size of the impeller plays an important role in determining the pump head. The impeller diameter determines how high the pump can lift the liquid. Impeller speed also affects the head. Since the head is proportional to the specific gravity of the liquid, the available suction pressure will be proportional to the density of the liquid. The density of water is about 1.2 kg/m3, and the suction pressure of the centrifugal pump is not enough to lift the water.
The rotary vane pump is a self-priming centrifugal pump
A rotary vane pump is a centrifugal pump with a circular pump head and a cycloid cam that supports the rotor. The rotor is close to the cam wall, and two side plates seal the rotor. Vanes in vane pumps are installed in these cavities, and the rotor rotates at high speed, pushing fluid in and out of the pump. The pump offers several advantages, including a reversible design and the ability to handle a wide variety of clean fluids.
Agknx Pumps manufactures a wide range of vane pumps that combine high performance, low cost, and easy maintenance. These pumps handle medium to high viscosity liquids up to 500 degrees Fahrenheit and 200,000 SSU.
The suction side of the rotary vane pump has a discharge port, and the valve prevents the backflow of the discharge air. When the maximum pressure is reached, the outlet valve closes to prevent the backflow of exhaust gas. The mechanical separation step separates the oil from the gas in the pump circuit and returns the remaining oil particles to the sump. The float valve then reintroduces these oil particles into the oil circuit of the pump. The gas produced is almost oil-free and can be blown out of a pipe or hose.
Rotary vane pumps are self-priming positive displacement pumps commonly used in hydraulic, aeration, and vacuum systems. Unlike gear pumps, rotary vane pumps can maintain high-pressure levels while using relatively low suction pressures. The pump is also very effective when pumping viscous or high-viscosity liquids. 
Rotary piston pumps are dry method positive displacement pumps
Rotary piston pumps are dry positive displacement pumps designed to deliver high-viscosity fluids. They are capable of pumping a variety of liquids and can run dry without damaging the liquid. Rotary piston pumps are available in a variety of designs. Some are single shafts, some are two shafts and four bearings.
Positive displacement pumps operate slower than centrifugal pumps. This feature makes the positive displacement pump more sensitive to wear. Piston and plunger reciprocating pumps are particularly prone to wear. For more demanding applications, progressive cavity, diaphragm or lobe pumps may be a better choice.
Positive displacement pumps are typically used to pump high-viscosity fluids. This is because the pump relies on a mechanical seal between the rotating elements and the pump casing. As a result, when fluids have low viscosity, their performance is limited. Additionally, low viscosity fluids can cause valve slippage.
These pumps have a piston/plunger arrangement using stainless steel rotors. Piston/piston pumps have two cavities on the suction side. The fluid then flows from one chamber to the other through a helical motion. This results in very low shear and pulsation rates. The pump is usually installed in a cylindrical housing.
Rotary vane pump corrosion resistance
Rotary vane vacuum pumps are designed for use in a variety of industries. They feature plasma-treated corrosion-resistant parts and anti-suck-back valves to help reduce the number of corrosive vapors entering the pump. These pumps are commonly used in freeze dryers, vacuum ovens, and degassing processes. The high flow rates they provide in their working vacuum allow them to speed up processes and reduce the time it takes to run them. Plus, they have energy-efficient motors and silent volume. <br/While rotary vane vacuum pumps are relatively corrosion resistant, they should not be used for aggressive chemicals. For these chemicals, the most suitable pump is the chemical mixing pump, which combines two types of pumps to improve corrosion resistance. If the application requires a more powerful pump, a progressive cavity pump (eg VACUU*PURE 10C) is suitable.
Oil seals used in rotary vane pumps are important to pump performance. The oil seal prevents corrosion of the aluminum parts of the rotary vane pump and prolongs the service life. Most rotary vane vacuum pumps have a standard set of components, although each component may have different oil seals.
Rotary vane vacuum pumps are the most common type of positive displacement pump. They provide quiet operation and long service life. They are also reliable and inexpensive and can be used in a variety of applications. 
Roots pumps are primarily used as a vacuum booster
Root vacuum pumps are mainly used as vacuum boosters in industrial applications. They need a thorough understanding of operating principles and proper maintenance to function properly. This course is an introduction to Roots vacuum pumps, covering topics such as pump principles, multi-stage pumps, temperature effects, gas cooling, and maintenance.
Roots pumps have many advantages, including compact and quiet operation. They do not generate particles and have a long service life. They also don't require oil and have a small footprint. However, Roots pumps have several disadvantages, including relatively high maintenance costs and low pumping speeds near atmospheric pressure.
Root vacuum pumps are often used with rotary vane vacuum pumps. They work on the same principle, the air enters a conveying unit formed by two rolling pistons in the housing. The piston heads are separated from each other, and the air passes through the unit without being reduced until it is discharged. When the air in the next unit reaches a higher absolute pressure, it is expelled from the last unit.
Roots pumps can be classified as sheathed or sealed. Roots pumps with sealed motors are suitable for pumping toxic gases. They have less clearance between the stator and motor rotor and have a sealed tank.
editor by czh 2022-12-31