How does shipping work for orders on MRO Exchange?

Most orders ship within 1–2 business days via UPS. Larger equipment ships via freight carrier, and customers can use the shipping estimator on the product page for a location-specific quote. Local pickup is also available at the Fairfield, IL facility, typically ready within 4 hours.

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MRO Exchange accepts all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available, with payment due prior to shipment. Custom terms are available for established accounts.

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Pfeiffer DUO 3 / PK D57 711 A Rotary Vane Vacuum Pump 3600 RPM Max 2.9 m3/h Pumping Speed

$999.00 USD

Sale Sold out

ConditionSurplus - Untested MPNDUO 3 / PK D57 711 A Stock #0426-02000

Photos reflect current condition. Items differing from description may be eligible for return or refund — see our condition guide.

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Estimated package weight: 35.0 lbs

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The Pfeiffer Vacuum DUO 3 is a two-stage rotary vane vacuum pump with a maximum pumping speed of 2.9 m3/h for nitrogen. The pump carries part number PK D57 711 A and serial number 22056595. Manufactured in Germany in August 2018, this unit operates on 115/230 V single-phase power at both 50 Hz and 60 Hz, drawing 2.90/1.45 A at 50 Hz and 3.90/1.95 A at 60 Hz. Maximum rotor speed is 3600 RPM. The oil charge is 0.4 liters, specified as P3 grade. Unit mass per nameplate is 11.5 kg. The integrated drive motor is an ATB Series P71 single-phase AC motor, model PBF 71/2B-11RQ, rated 0.15 kW (0.20 HP) at 50 Hz and 0.18 kW (0.24 HP) at 60 Hz, Class 155 (F) insulation, IP 55 enclosure, with a run capacitor of 2x25 MFD at 240 VAC. The DUO 3 is commonly used in laboratory, pharmaceutical, semiconductor, and light industrial vacuum applications requiring a compact, oil-sealed roughing pump. The unit is equipped with an exhaust filter assembly and an inline valve visible on the inlet side. The Pfeiffer Vacuum brand is manufactured by Pfeiffer Vacuum GmbH, headquartered in Asslar, Germany, a recognized supplier of vacuum technology for scientific and industrial markets.

Stock # 0426-02000

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Frequently Asked Questions

Shipping & Handling

Most orders ship within 1–2 business days via UPS, but expedited same-day handling is available as an add-on to orders in cart. Larger equipment ships via freight carrier. Use the shipping estimator above for a location-specific quote. Local pickup is also available at our Fairfield, IL facility, typically ready within 4 hours.

Returns & Condition

All items are sold as-described based on the photos and condition listed. If an item arrives differing from its description, it may be eligible for return or refund. See our full condition guide for details on our grading terms.

Payment Options

We accept all major credit cards, PayPal, and Shop Pay. Purchase order and wire transfer payment is also available by selecting "Purchase Order / Wire Transfer" at checkout. Payment is due prior to shipment. Contact us for custom terms on established accounts. Tax exemptions are honored if proper documentation is provided.

Pfeiffer DUO 3 / PK D57 711 A Rotary Vane Vacuum Pump 3600 RPM Max 2.9 m3/h Pumping Speed