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Rebuilt Dry Claw Vacuum Pumps

Dry claw vacuum pumps 100% rebuilt, restored to original equipment manufacturers specifications.

Edwards GV400 Dry Claw Vacuum Pump Rebuilt, Refurbished

Edwards GV400 Dry Claw Vacuum Pump Rebuilt, Refurbished
    Item Number: EDWARDS-GV400-DRYSTAR

    Warranty: 1 year past the documented date of installation.

    *Product images are for reference purposes only and do not necessarily correspond to the actual product.  

    Please call for price and availability

    IN STOCK - Please call for price and availability 855-466-6822

    Edwards GV400 Dry Claw Vacuum Pump Rebuilt, Refurbished

    Edwards IDX and GV/GVM Pumps

    Edwards is a market leader in dry pump technology and has pioneered the use of dry vacuum in some of the harshest applications.

    The IDX uses the very latest in double ended screw pumping technology, whilst the GV and GVM ranges utilize a reverse claw mechanism, proven over more than 10 years and 100,000 installations worldwide. Both provide reliable and economical solutions to the demands of today's industrial processes.

    The product range is available from 80 m3hr-1 / 47 ft3min-1 to 1300 m3hr-1 / 766 ft3min-1 with capacity expandable to 7000 m3hr-1 / 4120 ft3min-1 using directly mounted boosters and is ideal for backing large booster arrays or diffusion pumps.

    Why Dry?

    Dry Vacuum pumps - why not you? The competitive nature of today's business means changes are required to improve performance, lower costs, and provide optimal process solutions. The GV /IDX Dry pumping solution is the change from traditional oil sealed pumps to a proven technology for this industry. Edwards, a world leader in dry pump technology, has demonstrated the ability to provide a low-cost, custom tailored solution to your vacuum application. The benefits offered by the GV Dry/IDX Dry pumping solutions are:

    • Maintenance
      - Low capital cost and minimal maintenance requirements lead to lowest cost of ownership
      - Extended periods between user intervention
      - Lower consumable costs
    • Environmental
      - No oil disposal
      - No oil emissions into atmosphere
    • Performance
      - Very stable pumping speed gives repeatability to processes
      - Continuous pumping at atmosphere
      - Ability to handle particulates
      - Dry eliminates back-streaming, thus protecting reactive alloys from contamination
      - Significantly higher capacity for water vapor pumping than traditional oil sealed pumps
    • Safety
      - Unobtrusive noise levels
      - No unsightly oil spills
      - No hazardous oil vapors

    Cost Effective Technology

    In addition to the elimination of the costs of handling effluent and frequent oils changes, the IDX and GV/GVM ranges are designed to be 'fit and forget' products. The IDX and GVM range incorporates oil lubricated bearings (GV are grease packed) and high performance seals, proven on the EH booster range, to provide extended service intervals.

    The IDX utilize the latest double ended screw profile technology whilst the GV pumps are multi-stage claw pumps with the GVM range having an additional roots stage to enhance both pumping speed and ultimate pressure. All Edwards dry pumps are designed to minimize the amount of power they consume.

    All Edwards dry pump ranges are ideally suited to:

    • Metallurgy
      - Vacuum Induction Melting (VIM)
      - Precision Investment Casting (PIC)
      - Vacuum Arc Refining (VAR)
      - Electron beam welding
      - Vacuum sintering
      - Steel degassing
    • Heat treatment
      - Hardening
      - Plasma & LP nitriding
      - LP carburization
      - Vacuum brazing
    • Coating
      - Roll coating
      - Glass coating
      - Optical filters & lenses
      - Vacuum metallizing
      - Hard drive & CD mastering
      - Solar cell production
    • Drying
      - Transformers, capacitors & cables
      - Leather
      - Spices & fragrances
      - Nuclear industry
      - Chamber hogging

    and many more.

    With such a range of pumping speeds combinations and applications available, Edwards retains a comprehensive Applications Engineering capability and are able to offer a solutions package that includes:

    • Process design
    • Equipment specification and selection
    • Safety and operating procedures
    • Vacuum system and control integration
    • Commissioning advice

    Solutions Engineering

    The range and complexity of industrial applications means a 'one size fits all' policy does not result in system optimization. A detailed appreciation of the process, environmental and safety issues is required to tailor systems to match performance and process.

    Applications Design & Support

    Edwards comprehensive design service is based on in-depth knowledge of the industries and applications involved. This expertise is held in the highly focused and experienced applications team, which consists of a Central Applications Group supported by a regional network of Applications Specialists. Proprietary software is used to define pumping requirements and a suite of optional accessories or modules are available. For larger or more unusual applications a custom engineering service is available.

    Solutions could cover:

    • Process design
    • Equipment selection
    • Safety and Operating Parameters
    • Integration with plant control system(s)
    • Commissioning advice and more...

    Contact your local office to request an initial discussion with an Applications Specialist. Typically, discussions will include gases / materials to be pumped, cycle times and duty pressures, system capacities, control systems, utilities, system footprint and all other aspects of the vacuum system to ensure that we are able to offer the most effective solution for your application.

    Modular & Custom Accessories

    Accessory modules allow systems to be produced that address customer requirements without impacting on system lead times and allow a highly flexible approach to solutions engineering.

    Accessory modules offered include:

    Gas Purges

    Gas purge can be nitrogen, CDA (Clean Dry Air) or atmospheric air. They are used to protect seals, clean/blow through dust and particulates, cooling the gas load, etc. Options available are shown below and all are available with a control panel.

    • Shaft seal purge
    • Gas ballast purge
    • Exhaust purge
    • Atmospheric purge
    • High flow air purge (see filtration)

    Utilities Control Panel

    Water and gas may be monitored and controlled by the addition of a gas panel. The panel also allows full integration with supervisory control systems.

    GV/GVM Temperature Control

    The pumps are supplied as directly cooled as standard but, where poor quality cooling water is available or increased temperature control is required, an indirect cooling system can be specified. This module uses an external heat exchanger and an adjustable TCV (Temperature Control Valve) to set operating temperature. Options are:

    • Direct cooled -pump only
    • Direct cooled -pump and booster
    • Indirectly cooled -pump only
    • Indirectly cooled pump, directly cooled booster

    All of the above options are available with a control panel.

    • Air blast cooling may be specified and sized to suit the system heat load

    IDX Temperature Control

    These pumps are supplied with indirect cooling as standard fitting.

    Mechanical Boosters

    Addition of a booster provides increased pumping speed & improved ultimate. The GV and GVM ranges are available with EH hydro-kinetically driven boosters and Stokes 6" series direct drive mechanical boosters directly mounted onto the pump. The pumps are also suitable for backing larger boosters, such as Edwards HV range.

    Boosters are available with:

    • Cooling options
    • Rotation & pressure sensors
    • Variable speed drives
    • By-pass valve technology for shortened pump down times


    Silencers reduce pulsations in the exhaust and hence noise in the exhaust line.

    They also act as a dust trap and can accumulate condensates. All silencers are drainable and for high dust loads, a cleanable unit is available. This allows the silencer to be cleaned without breaking the process line. Enclosures are lined by foam panels with absorbance frequencies that match the pumping system and reduce system noise by >5dB(A).

    • Silencers - stainless steel, drainable
    • Silencer - stainless or mild steel, cleanable and drainable
    • Full system enclosures


    Many industrial processes produce large quantities of dust of varying particle size that may also be wet, pyrophoric or corrosive. Edwards recommend that the main dust load is removed before the inlet of the pump and offer the following:

    • ITF filters for dry dust
    • ITM filters for wet dust or backing diffusion pumps
    • High flow air purge (700 mbar) to blow dust build up though the pump as required

    Local Control Panels

    For all systems supplied by Edwards a range of control panels are available. They vary in sophistication and are designed to offer basic control through to complete plc-based control.

    Edwards have pioneered the use of dry vacuum pumps in some of the most harsh applications. With over 20 years experience and more than 100,000 Drystar pumps installed world-wide.

    Our GV Drystar pumps are designed to handle large volumes of dust and water vapor without the risk of process contamination while maintaining high levels of repeatability, performance and reliability.

    The GV400 Drystar pumps have a displacement of (425m3hr-1) and can be coupled with the Edwards EH series mechanical booster for increased pumping performance.

    Features & Benefits

    • Robust ductile iron construction
    • Repeatable pumping performance
    • Ability to control pump temperature
    • Excellent dust and vapor handling capability
    • Fit and forget performance


    • Vacuum Induction Melting (VIM)
    • Precision Investment Casting (PIC)
    • Vacuum Arc Refining (VAR)
    • Vacuum Coating
    • Electron beam welding
    Construction 3 claw
    Displacement (swept volume) 540 m3 h-1 / 318 ft3 min-1
    Pumping speed* 380 m3 h-1 / 225 ft3 min-1
    Ultimate pressure < 0.4 mbar / < 0.3 Torr
    Power consumption at 10 mbar/7.5 Torr 7 kW / 9.4 hp
    Motor Rating 18 kW / 24.1 hp
    Cooling-water flow at 20 °C 4 l min-1 / 1.1 gal min-1
    Seal purge (dry air) < 22 l min-1 @ 0.4 bar
    < 0.6 ft3 min-1 @ 6 psig
    Noise level 82 dB(A)
    Inlet connection ISO100
    Outlet connection ISO63
    Weight 820 kg / 1804 lbs
    Gear box oil capacity 1.5 liter / 0.4 gal
    Electrical supply 380-400/415V 50 Hz 3ø

    * Measured in accordance with Pneurop 6602 at 40 °C

    IVS is committed to your complete satisfaction.  To ensure the greatest success and performance of your new vacuum equipment purchase, please call an IVS representative today at 855-466-6822 or simply fill out our contact form here: Contact IVS and a Sales Engineer will contact you within 24 hours.

    Not exactly what you're looking for? Innovative Vacuum Solutions is a total solutions provider and can customize or configure your vacuum equipment. Call us toll free at 855-466-6822 and speak to a Sales Engineer to determine your specific needs.


    Our precision vacuum pump rebuild process restores worn or damaged equipment back to the original manufacturers specifications and
    costs a fraction of purchasing new components. Each unit reconditioned by IVS is supported by the most competitive,
    practical warranty in the business: one year from the documented date of installation, not shipment.

    Click here to see the full IVS Business Practical Warranty
    • IVS will safely package your product for shipment at no additional charge.
    • Buyer is responsible for all shipping arrangements and charges.
    • Please allow ten days for delivery from order date to allow for certification and shipping of your equipment.

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