WHU Roots pump

NegotiableUpdate on 05/06

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Nature of the Manufacturer: Producers

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Overview

WHU Roots Pump Technology Advantages $r $n Oil free Sealing Design $r $n Fully Sealed Motor+Fluororubber Seals, Isolating Lubricating Oil Pollution, Suitable for High Purity Processes such as Semiconductors and Photovoltaic Coatings $r $n Efficient Bypass System $r $n New Control Valve Shortens Evacuation Time, Supports Atmospheric Pressure Start, Response Speed Superior to Variable Frequency Speed Control $r $n Water Cooling Collaborative Temperature Control $r $n Dual Water Cooling Design for Motor and Oil Pool $r $n Oil Temperature Reduction of 50%, Extended Bearing Life, Reduced Heat Dissipation (Suitable for Cleanroom) $r $n Variable Frequency Compatibility $r $n Optional Variable Frequency Converter can increase pumping speed by 140% (such as WHU 251 reaching 4200rpm), optimize energy consumption by 30%

Product Details

WHU Roots pumpCore models and technical parameters

Model number	Extraction speed (m ³/h)	Ultimate pressure (mbar)	Power (kW)	Cooling method	Core Features
‌ WHU 1001 ‌	22.5	0.5	0.9	Water cooled fully sealed motor	Compact horizontal design, integrated bypass system, supports atmospheric pressure start-up
‌ WHU 2001 ‌	65	<0.05	1.5-2.2	Water cooling (anti-corrosion of stainless steel components)	Vertical/horizontal optional, equipped with pressure balance pipe, suitable for oil sealed front-end pump (such as D65B)
‌ WHU 251 ‌	100-250	<0.01	4-7.5	Water cooling+oil pool cooling	Variable frequency compatibility (20-100Hz), fluorine rubber seal resistant to chemical corrosion 89
‌ WHU 4400 ‌	4400-7040*	0.008	11/18.5	Integrated water cooling system	Three blade rotor noise reduction (<75dB), bypass valve speed increased by 30%, DN250 inlet flange
‌ WHU 501 ‌	>300	<0.005	11-15	Dual circuit water cooling	High voltage differential tolerance（ 80mbar@80Hz ）Suitable for multi-stage series systems

Note: The pumping speed of WHU 4400 can be increased with frequency (50Hz: 4400m ³/h 80Hz: 7040m ³/h)）

WHU Roots pumpTechnological advantages

1. Oil free sealing design

Fully sealed motor+fluororubber seal, isolated from lubricating oil pollution, suitable for high-purity processes such as semiconductor and photovoltaic coating

2‌. Efficient bypass system

The new control valve shortens the evacuation time, supports atmospheric pressure start-up, and has a response speed better than variable frequency speed regulation

3. Water cooling collaborative temperature control

Dual water cooling design for motor and oil tank, reducing oil temperature by 50%, extending bearing life, and reducing heat dissipation (suitable for dust-free workshops)

4. Frequency conversion compatibility

Optional frequency converter can increase pumping speed by 140% (such as WHU 251 reaching 4200rpm) and optimize energy consumption by 30%

Maintenance and Fault Prevention

1‌. Regular maintenance

Replace bearings and mechanical seals every 2000 hours, using designated lubricating oil (mineral oil LVO 100/synthetic oil LVO 210/perfluorooil LVO 400)

2‌. Anti blocking measures

Install a secondary low-temperature condenser at the entrance to prevent organic matter from sticking to the rotor; Regularly clean the pump chamber with 5% acid-base solution

3‌. Operation taboos

The opening time of the bypass valve is ≤ 3 minutes, and a continuous pressure difference greater than 100mbar can easily cause the rotor to overheat and deform