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Flowserve SIHI Dry System

PD | GD | CD

The truly dry vacuum pump with the lowest total cost of ownership.

Designed for chemical & pharmaceutical markets where an explosion-proof design is required (PD), and for a broad range of industrial applications (GD & CD). The PD is vertically orientated with a self-drainage system, and has a completely dry running vertical twin-screw machine with no mechanical shaft seals, making it ideal for chemical, pharmaceutical, and industrial applications that require uncontaminated vacuum, free from oil or service liquids. The GD & CD pumps are used in food & beverage and other industries. This range is also ideal for processes where there is a high possibility of liquids or solids carry-over, while the PD & GD series can also accommodate corrosive gases and vapours.

Features & Benefits

  • Zero service liquids required
  • Wear-free parts
  • Sufficiently robust for tough operating conditions
  • Easy service & maintenance (one-day onsite service)


  • ATEX Directive 2014/34/EU-certified
  • NEC & CEC Class 1 & 2-certified
  • Ultimate pressure: Down to < 0.1millibar
  • Size range: 100 to 1 500 m3/h


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    SIHI Dry: Chemical Dry Vacuum Pumps — Simple, Dry & Reliable – view its operation