Basic Info.
After-sales Service
Online Video Instruction
Nominal Pumping Speed(50Hz)
354 M3/H
Nominal Motor Rating(50Hz)
7.5 Kw
Nominal Motor Speed(50Hz)
2900 Rpm
Cooling Water Required
10 L/Min
Suction Connection Size
50 mm
Discharge Connection Size
40 mm
Weight (Without Motor) Approx.
400 Kg
Pitch Type
Third Generation Variable Pitch
Transport Package
Wooden Box or Per Customer Requirements
Product Description
Working principle
The vacuum in dry screw pumps is created through two parallel-arranged screw rotors that rotate in opposite directions. These rotors trap the gas coming in through the inlet and deliver it to the gas discharge or pressure side. As the gas is getting compressed, there is no contact between the rotors. This does away with any need for the compression chamber to have any operating fluids or lubrication.
The lubricant used to lubricate the gears and shaft seal is sealed in the gearbox by the shaft seal. The pump can be cooled either directly by circulating cooling water or by a cooling unit with fan and radiator.
The dry screw vacuum pump adopts a special rotor pitch design, compared with the ordinary rotor pitch design, reduce the energy consumption by about 30%, the temperature rise of the exhaust end is reduced by about 100 ºC, the reliability and stability of the operation of the product is greatly improved, can be suitable for any working conditions of vacuum.
The dry screw pumps can be widely used in solvent recovery, vacuum drying, concentration, crystallization, distillation and other processes in the chemical and pharmaceutical industries, vacuum extrusion and molding in the plastic and rubber industries, vacuum degassing in the metallurgical industry; vacuum degassing and drying in the solar energy, microelectronics, lithium battery and other industries.
Pump body and end caps: high-strength cast iron.
Pump body and end caps: high strength cast iron.
Screw rotor: ductile cast iron.
Anti-corrosion coating: corrosion-resistant Hastelloy.
Synchronous gears: alloy steel.
Radial lip seal: imported PTFE mixture or
high-temperature resistant fluorine rubber;
Seal bushings: stainless steel surface covered with ceramic.Flow chart
Main features
1. The screw rotor is designed with variable pitch structure, the ultimate vacuum can reach below 1Pa, which can meet all kinds of vacuum processing from atmosphere to high vacuum.
2. Oil free - Adapt to various special working conditions for reliable use.
3. It can operate reliably in the pressure range from atmosphere to several Pa.
4. No friction between moving parts, simple structure, lower operation and maintenance cost.
5. Nitrogen seal and composite seal design is optional, which has the benefit of good reliability, low cost of use, simple maintenance.
6. The rotor is dynamically balanced at high speed and the motor is connected by flange, with high concentricity, low vibration and low noise.
7. Hastelloy anti-corrosion coating is optional for rotor surface, condensable material is not easy to condense in the pump cavity, better corrosion resistance.
8. Compared with oil seal pump, liquid ring pump, there is no waste gas, no waste liquid, no waste oil emission, energy saving and environmental friendly.
It can be used alone or with Roots vacuum pump, air-cooled Roots vacuum pump, molecular vacuum pump, etc. to obtain an oil-free high vacuum system.
The benefit of dry screw vacuum pump compared to liquid ring vacuum pump:
-Shorten the process cycle and improve production efficiency
-Reduce water consumption
-Save energy
-Improve product quality
-Can recover solvent by reducing the drying time of products
-Reduce the cost of wastewater and waste gas treatmentA CASE in a pharmaceutical factoryProcess introduction:The penicillin sodium salt solution is fed into the crystallization tank through vacuum. By steam heating, agitator stirring, and adding butanol, the water and butanol in the penicillin solution are pumped into the condenser and condensed into the liquid collecting tank, which can be reused.Process requirements:1. The volume of crystallization tank is 7.5m3, and about 4.5m3 penicillin solution is added in the process.
2. Before entering the crystallization tank, the water content of penicillin solution is about 20%, and after crystallization, the water content is required to be about 1%.
3. Vacuum feeding for 2h, then adding butanol for 30min, and then starting to crystallize. The process requires low temperature and fast speed, and the lower the temperature, the better the quality of penicillin. The shorter the reaction time, the better.
4. Vacuum degree requirements: the vacuum degree shall be kept above -0.097MPa. High vacuum degree can reduce the reaction temperature and shorten the reaction time.The previous vacuum system was 2BE1252+air ejector, which is now transformed into a dry screw vacuum pump. The comparison table of test data is as follows: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 |
Economic benefit analysis: | 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 | |
Please contact us for a detailed report of economic benefit analysis for your applications!
Configuration
Standard configuration:
Machine base, pump head, coupling, motor, driving screen, air inlet connector, check valve, vacuum gauge, manual filling valve exhaust port muffler.
Optional accessories:
Inlet filter, inlet condenser, solvent flushing device, nitrogen purging device, nitrogen sealing device, exhaust port condenser, solenoid filling valve, cooling water flow switch, temperature sensor, pressure transmitter.
Applications
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 | | | |
Product Parameters
Technical data of Variable pitch Dry screw vacuum pump
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 |
Technical data of Constant pitch Dry screw vacuum pump
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 |
Note: The cooling water volume of the dry screw vacuum pump provided in the table is the amount under 20ºC room temperature water. When the dry screw vacuum pump uses cooling device, the cooling water will be increased, the difference of inlet and outlet water temperature is generally controlled below 7ºC is appropriate.
Dimension
FAQ
Q: What information should I offer for an inquiry?
A: You can inquire based on the model directly, but it is always recommended that you contact us so that we can help you to check if the pump is the most appropriate for your application.
Q: Can you make a customized vacuum pump?
A: Yes, we can do some special designs to meet customer applications. Such as customized sealing systems, speical surface treatment can be applied for roots vacuum pump and screw vacuum pump. Please contact us if you have special requirements.
Q: I have problems with our vacuum pumps or vacuum systems, can you offer some help?
A: We have application and design engineers with more than 30 years of experience in vacuum applications in different industries and help a lot of customers resolve their problems, such as leakage issues, energy-saving solutions, more environment-friendly vacuum systems, etc. Please contact us and we'll be very happy if we can offer any help to your vacuum system.
Q: Can you design and make customized vacuum systems?
A: Yes, we are good for this.
Q: What is your MOQ?
A: 1 piece or 1 set.
Q: How about your delivery time?
A: 5-10 working days for the standard vacuum pump if the quantity is below 20 pieces, 20-30 working days for the conventional vacuum system with less than 5 sets. For more quantity or special requirements, please contact us to check the lead time.
Q: What are your payment terms?
A: By T/T, 50% advance payment/deposit and 50% paid before shipment.
Q: How about the warranty?
A: We offer 1-year warranty (except for the wearing parts).
Q: How about the service?
A: We offer remote video technical support. We can send the service engineer to the site for some special requirements.
Address:
Room 101, Building No. 3, No. 288 Xinfu Road, Shanghai, China
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Agriculture & Food, Auto, Motorcycle Parts & Accessories, Bags, Cases & Boxes, Chemicals, Electrical & Electronics, Furniture, Industrial Equipment & Components, Manufacturing & Processing Machinery, Metallurgy, Mineral & Energy, Packaging & Printing
Management System Certification:
ISO 9001, ISO 14001
Company Introduction:
Shanghai SVC Technology Co., Ltd. is a company specializing in vacuum technologies. We provide custom-engineered solutions and premier products for vacuum applications.
Our company′s technical research and development, manufacturing, and management team come from many well-known vacuum pump manufacturing companies. They have decades of professional manufacturing experience in vacuum pumps and vacuum systems.
The company has a number of new four -axis, five -axis CNC processing equipment and testing equipment and standardized production workshops. Important components of all products use CNC processing and strict 3D detection. Advanced processing, inspection equipment and mature product structures, and a comprehensive quality management system ensure that the product has high reliability.
The Tri-lobe Roots vacuum pump independently developed by the company is an upgraded product of the traditional Roots vacuum pump. Compared with the traditional double lobe vacuum pump, the new Tri-lobe roots vacuum pump has performance advantages such as high volume efficiency, low noise, stable operation, small vibration, small temperature rise and high reliability.
Since 2008, we have been developing constant pitch screw pump rotor design, and our products have been upgraded for many times. We found out three kinds of variable pitch screw pump rotor designs, and gained a lot of practical experience. We have DSP Series constant pitch screw vacuum pump and DVP series variable pitch screw vacuum pump (The 3rd generation design).
The sealing system of the above dry vacuum pump can choose a variety of sealing types such as mechanical seal, PTFE lip seal, and FKM oil seal to meet the customer′s different process requirements.
The dry vacuum pump and various dry vacuum units are suitable for dry gases, condensable gas, corrosive gases, gas liquid mixture, and special gas containing granular dust. It can be widely used in vacuum concentration, vacuum distillation, vacuum crystals, vacuum drying in the chemical and pharmaceutical industry; Vacuum degassing, vacuum preservation of the food industry; Vacuum molding and vacuum extrusion in rubber and plastic industries; Vacuum refining and vacuum degassing of steel and gold industry; All kinds of vacuum furnace vacuum pumping, vacuum melting, vacuum welding, vacuum heat treatment, vacuum casting; Semiconductor, microelectronics, integrated circuit vacuum degassing; Aerospace wind tunnel simulation test vacuum and other fields.