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double stage vacuum pump

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2TW-2E double stage vacuum pump

Price Range:0

Details: VACUUM PUMP,PUMP,ROTARY PUMP,DOUBLE STAGE VACUUM PUMPIT IS 2TW-4EDOUNLE FREQUENCE DOUBLE VOLTAGE ROTARY VACUUM PUMP,REFRIGERATION TOOL IF YOU HAVE...

Jinan Bestar Inc.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Vacuum Pump (VP215) (CE,CCC,UL)

Model / Specifications:VP215

Brand Name:SEASKY

Theory:Vacuum Pump

Structure:

Usage:Air Pump

Details: Products/Services: vacuum pump, single stage vacuum pump, double stage vacuum pump, double voltage stage vacuum pump, oil vacuum pump, oil less...

Hangzhou Seasky Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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double stage vacuum pump

Model / Specifications:VP245

Details: Double Stage Vacuum Pump (CE, ROHS) Free air displacement: 5CFM... Place of Origin: CN;ZHE

Hangzhou Gulun Refrigeration Equipment Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Double Stage Vacuum Pump (NPTC-VE215N)

Model / Specifications:NPTC-VE215N

Details: Detailed introduction to Double Stage Vacuum Pump (NPTC-VE215N): Double Stage Vacuum Pump (NPTC-VE215N)Integrated pump body structure,15 m...

Ningbo Partsnet Co.,Ltd

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Double Vacuum Pump

Model / Specifications:NPTC-2TW0.5CV;NPTC-2TW1CV

Details: We can supply Double stage vacuum pump with gauge,two stage vacuum pump,vacuum pump with gauge Specification:

Ningbo Partsnet Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2SK-1.5B liquid ring vacuum pump

Details: double-stage liquid ring vacuum pump 2SK-B This is a excellent two stage water loop vacuum pump.Being droved by trap, adopted with cooper impello...

Shanghai Yulong Vacuum Pump Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Vacuum pump(VPA230)

Model / Specifications:VPA230

Details: Double stage, oil sealed, rotary vane vacuum pump, manufactured with the latest technology and specifically designed for technic... ...

Taizhou Greentech Machinery & Electric Equipment Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Double Stage Vacuum Pump(VE225SV)

Model / Specifications:VE225SV

Brand Name:VALUE

Theory:Vacuum Pump

Structure:Double Stage Vacuum Pump

Details: Products/Services: Rotary vane vacuum pumps,Recovery machine,Tube tools,Electronic charge/recover scale,Industrial vacuum pump

Zhejiang Value Mechanical and Electrical Products Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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VP double-stage vacuum pump

Model / Specifications:VP

Price Range:US $10 - 115 / Set

Brand Name:China Coal

Theory:Vacuum Pump

Structure:double stage

Usage:vacuum pump

Details: Products/Services: rock drill, hoisting equipment, shotcrete machine, railway parts, mine car, pneumatic rock drill, tramcar, drill rod, drill bit,...

Jining China Coal Industrial Equipment Corp., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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37CFM vacuum pump

Model / Specifications:FX16

Brand Name:FIRST

Theory:vacuum pump

Structure:double stage vacuum pump

Usage:

Details: SpecificationsDetails as follows : Mode FX16( 2XZ-4B )Free Air Displacement 4.4L/s16 m³/hCFM :9.0 Inlet DiamI.D. 25mmO.D. 25mmCooling ...

VACUUM PUMP OF SHANGHAI FIRST

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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double stage vacuum pump

Model / Specifications:564502

Brand Name:HARPOW

Details: double stage vacuum pump...

SINOMAST INT'L CO LTD

Business Type:Manufacturers

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Hong KongHong Kong

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Direct couping Double-stage Vacuum pump

Model / Specifications:2XZ

Brand Name:TBT

Theory:Vacuum Pump

Structure:dual stage vacuum pump

Usage:Vacuum Pump

Details: 2XZ Direct couping Double-stage Vacuum pump Specifications:Model2XZ-12XZ-22XZ-42XZ-8Voltage(V/Hz)220V/50Hz380V/50Hz220V/50Hz380V/50Hz220V/ 50Hz380...

Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Double Stage Hight Speed Vacuum Pump

Model / Specifications:AC-4E

Brand Name:ACTEXMAX

Theory:Vacuum Pump

Standard or Nonstandard:Standard

Details: Vacuum Pump Double Stage Hight Speed Vacuum Pump (ISO 9001 / CCC / CE )...

Ningbo Jiangdong Anchor Auto Parts Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Two Stage rotary vane 1/3HP 2.5CFM Double Stage Vacuum Pump for refrigerating system VP225

Details: Two Stage rotary vane 1/3HP 2.5CFM Double Stage Vacuum Pump for refrigerating system VP225 Description: Voltage 220V/50HZ 110V/60HZ Free A...

Poly Run Enterprise Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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WATER-RING VACUUM PUMP, DOUBLE STAGE

Model / Specifications:PVW-T

Details: PROMIVAC WATER-RING VACUUM PUMP DOUBLE STAGE For Confectionary, Extrusion, Ceramics, Garment & Leather Processing, Packaging... ...

PROMIVAC ENGINEERS

Business Type:Manufacturers

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IndiaIndia

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double stage vacuum pump

Model / Specifications:2GVP-3C

Price Range:US $0 - 500

Brand Name:GREATCOOL

Details: double stage vacuum pump 1) Low noise and quiet operation 2) High limited pressure 3) Oil-returning prevention design...

Hangzhou Greatcool Refrigeration Equipment Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Double Stage Vacuum Pump

Details: Quick Details Place of Origin: China (Mainland) Model Number: VP260 Theory: Vacuum Pump Structure: Double Stage Pump Usage: Air Conditioning Power...

Hubei Aikeshi Import & Export Co., Ltd

Business Type:Distributor/Wholesaler

Free Member

China (Mainland)China (Mainland)

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Luxurious vacuum waste transformer oil purification

Details: ZYD adopts advanced double stage vacuum system, including vacuum pump and roots pump, which can rapidly and effectively remove water, trace water,...

Chongqing Nakin Electromechanical Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2X Double-stage Rotary Vane Series Vacuum Pump

Theory:2X Double-stage Rotary Vane Series Vacuum Pump

Structure:Double stage pump

Usage:Water

Power:Hydraulic

Details: Application: The 2X series vacuum pump is of double-stage structure, whose operation performance consists of two parts, that is high-pressure stag...

Ningbo longcheng valve co.,Ltd

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2SK Double Stage Liquid Ring Vacuum Pump

Details: 2SK Double Stage Liquid Ring Vacuum Pumpvacuum pump,vacuum pumpsFeatures:2SK type double stage water ring vacuum pump is used for sucking air or o...

Hangzhou Chinabase Machinery Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2X double stage rotary vane vacuum

Model / Specifications:2X

Price Range:US $100 - 10,000 / Set

Brand Name:kolda

Theory:Vacuum Pump

Structure:double stage

Usage:air

Details: Products/Services: Pump

Shanghai Kolda Pumps Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2X double stage rotary vane vacuum pump

Details: 2X double stage rotary vane vacuum pump The 2X series vacuum pump is of double stage structure, whose operation performance consists of two ...

Yongjia ChenDa Pump&Valve Manufacture Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2X Double Stage Rotary Vane Vacuum Pump

Details: 2X Double Stage Rotary Vane Vacuum Pump Application:2X series vacuum pump is of double-stage structure, whose operation performance consists of tw...

Yongjia Welldone Machine Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2X double stage rotary vane vacuum pump

Model / Specifications:2X-70

Details: Detailed introduction to 2X double stage rotary vane vacuum pump: Brief introduction of 2X series two stage rotary vane vacuum pump 2X series ...

Foshan DongShan Vacuum Equipment Co., Ltd

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Double Stage Vacuum Pump

Details: Products/Services: Solid Pharmaceutical Machinery, Post-Packaging, Weighing Packing, Water Purification, Dryer, Man's Garment, Baby's Clot...

A&M Technology Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2X sliding vane rotary vacuum pump

Model / Specifications:2X sliding vane rotary vacuum pum...

Price Range:US $380 - 1,800 / Unit

Brand Name:SZ

Theory:Vacuum Pump

Structure:double stage

Usage:Oil

Details: Products/Services: vacuum pump,set of vacuum pump,vacuum obtained equipments

Shanghai Vacuum Pump Works Co., Ltd.

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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2RS-1.5 Two Stage Vacuum Pump

Model / Specifications:2RS-1.5

Brand Name:Hong Bao Shi

Theory:Vacuum Pump

Structure:double stage pump

Usage:Air Pump

Details: Products/Services: Vacuum pump,pump part,motor,Vacuum meter

Wenling Hongbaoshi Vacuum Equipment Factory

Business Type:Manufacturers

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China (Mainland)China (Mainland)

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Zhensheng cigar lighter vacuum pump 2Z-1.5BD

Model / Specifications:2Z-1.5BD

Price Range:US $50 - 100 / Set

Brand Name:zhensheng

Theory:Vacuum Pump

Structure:double-stage pump

Usage:Oil

Details: Products/Services: Refrigerant parts,Copeland compressors,vacuum pumps,refrigerants,cold storage parts

Shanghai Zhuoli Refrigerant Equipment Co., Ltd.

Business Type:Manufacturers

Free Member

China (Mainland)China (Mainland)

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2SK series liquid-ring vacuum pump

Model / Specifications:2SK-12

Brand Name:East pearl

Theory:Vacuum Pump

Structure:double-stage

Usage:Air Pump

Details: Products/Services: Centrifugal pump, stainless steel pump, vacuum pump, submersible pump, chemical pump, multistage pump, diaphragm pump, sewage...

Chengdu Pearl Pump Industry Co., Ltd.

Business Type:Manufacturers

Free Member

China (Mainland)China (Mainland)

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Vacuum Pump

Model / Specifications:High-quality vacuum pump

Price Range:US $1 - 1,000 / Piece

Theory:Vacuum Pump

Structure:singl/double stage

Usage:Oil

Power:Electric

Details: vacuum pump Features: 1) Low noise and quiet operation2) High limited pressure3) Oil-returning prevention design4) Forced-feed lubrication systemC...

Ningbo Iceage Imp. & Exp. Co., Ltd.

Business Type:Manufacturers

Free Member

China (Mainland)China (Mainland)

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Product Summary

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The double stage vacuum pump, or two stage vacuum pump, or dual stage vacuum pump, has a first stage of vacuum pump constituted by a screw-type vacuum pump and a second stage vacuum pump constituted by an oil-sealed rotary vacuum pump operative to maintain the back pressure of the first stage vacuum pump at a level ranging from 1 to 100 Torr., whereby a high level of vacuum can be attained in a system to be evacuated without any risk of contamination of the evacuated system by oil. Also disclosed is a method of operating the two-stage vacuum pump apparatus.

In general, it comprises: a first stage screw-type vacuum pump having a suction port connected to a system to be evacuated and adapted to be driven by a first electric motor; a second stage vacuum pump connected to a discharge port of said first stage vacuum pump and adapted to be driven by a second electric motor; a first pressure sensing means for sensing the pressure in said suction port of said first stage vacuum pump; a second pressure sensing means for sensing the pressure in said discharge port of said first stage vacuum pump; and a control unit including a reference suction pressure setting means for presetting a first reference level for the suction pressure at said suction port, a reference back pressure setting means for presetting a second reference level for the back pressure at said discharge port of said first stage vacuum pump, a first comparator for comparing said first reference level with the level of the suction pressure sensed by said first pressure sensing means to generate a first speed changing signal for said first electric motor, a second comparator for comparing said second reference level with the level of the back pressure sensed by said second pressure sensing means to generate a second speed changing signal for said second electric motor, and a speed controlling means responsive to said first and second speed changing signals from said first and second comparators to control the

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