Overview

Edwards, a leader in vacuum pump technology with over 95 years of expertise, presents the GXS Dry Screw Vacuum Pumps. These pumps are engineered for high performance, reliability, and cost efficiency across diverse industrial applications.

Key Features and Benefits

• Fast Performance: Achieves vacuum levels down to 5 x 10^-4 mbar, reducing pump down times and enhancing productivity and product quality.
• Robust Design: Suitable for harsh industrial environments with low maintenance and extended service intervals.
• Intelligent Control: On-board controller supports Ethernet, Profibus, RS232 communications, enabling automated, safe, and consistent operation with easy integration.
• Economical Operation: Low capital investment, energy-efficient operation, and small footprint reduce total cost of ownership.
• Environmental Considerations: Quiet operation with no contaminated oil disposal, minimizing environmental impact.

Innovative Screw Technology

• Double Ended Shaft Support: Non-cantilever design reduces vibration and improves starting reliability, handling liquid and powder slugs effectively.
• Advanced Shaft Sealing: Non-contacting long-life seals with oil-blocking labyrinth and purge protect gearbox and vacuum space from contamination.
• High-Efficiency Motor and Drive: Hermetically sealed, water-cooled motors with electronic drives deliver maximum torque and reliability, lowering service costs.
• Oil-Lubricated Gears and Bearings: Use of advanced bearings and low vapor pressure oil enhances durability and compatibility.

GXS Booster and Control Panel

• Intelligent on-board control panel with soft button control, automatic start/stop, power saving modes, and remote monitoring.
• Advanced screw rotor design ensures smooth compression, thermal control, and capability to pump argon gas at full concentration.
• Quiet operation without silencers due to improved design and manufacturing.
• Roots booster optimized for high efficiency and automatic thermal management.

Applications

Suitable for a broad range of industrial vacuum applications including metallurgy (brazing, welding, nitriding), coating (CVD/DLC, plasma spray), drying (freeze drying, battery drying), plasma processes, and solar/LED manufacturing.

Customization and Accessories

Edwards offers tailored solutions from single pumps to complete systems. Accessories include shaft seal purge options (light to high flow), inlet filters, silencers, and more to meet specific application needs.

Technical Specifications Summary

Note: Variants with different pumping speeds and power ratings, including booster combinations, are available.

Operational Parameters and Requirements

• Operating temperature: 5-40°C (41-104°F), with some low voltage variants limited to 5-30°C.
• Maximum cooling water pressure: 6.9 bar (100 psig).
• Minimum differential pressure across pump: 0.75 to 1.0 bar depending on model.
• Purge gas pressure: 2.5-6.9 bar (36-100 psig) with flow rates varying by duty level.
• Vacuum couplings: ISO standard inlets and NW exhaust connections.
• System IP rating: Standard 21D.
• Lubrication: PFPE Drynert® 25/6 oil, volume varies by model.

Control and Monitoring Options

• Standard front panel dashboard with RS232 serial communication.
• Ethernet webserver for remote monitoring.
• Optional Profibus DP, Pump Display Terminal (PDT), and FabWorks® software control.

Pump Configurations and Dimensions

The GXS series includes models GXS160, GXS250, GXS450, and GXS750, with booster combinations (e.g., 1750, 2600, 4200). Pumps come with side-exit exhaust on skids or rear-exit exhaust on castors. Earthquake restraints are provided for castor-mounted units. Detailed dimensional data (length, width, height, mounting) are specified for installation planning.

Performance Curves

Performance graphs illustrate pumping speed versus pressure for all models, including standard and high-flow purge configurations, aiding in selecting the appropriate pump for specific vacuum requirements.

Accessories

Inlet and Exhaust Accessories

• Foreline spool adapters for instrumentation
• Integrated inlet isolation valves
• Inlet filter housings with polyester or stainless steel elements
• Exhaust silencers (drainable and cleanable)
• Exhaust check valves

Control and Monitoring Accessories

• Handheld terminals and virtual pump display terminals
• Profibus and digital interface modules
• Water and nitrogen flow monitoring kits
• Pressure and temperature transmitters and gauges

Inlet Vacuum Filters

Filters prevent solid ingress, extending pump life. They feature helium leak testing to 1x10⁻⁶ mbar/l/sec, >99% efficiency to 5μm for polyester elements, rugged carbon steel construction, with stainless steel options.

Automatic Inlet Isolation Valves

Integrated with GXS control system, these valves close on alarms or power failure, enabling energy-saving modes. Constructed from stainless steel and EPDM, pneumatically actuated with spring return, and low pressure drop.

Harsh Duty Exhaust Silencers

Reduce noise by over 15 dBA, constructed from painted carbon steel or stainless steel, with drain valves and mounting kits available.

Inlet Spools

Facilitate connection of valves, filters, and instrumentation ports. Made from painted carbon steel or stainless steel with BSP ports.

Ordering Information

Ordering codes specify application type, pump/booster model, lubrication (PFPE Drynert 25/6), electrical supply voltage, installation type (side/rear exhaust), purge options (light, medium, high flow/solvent flush), and cooling options (standard or enhanced TMS+).

Complementary Accessories

• Control and communication devices: Pump Display Terminals (PDT), Virtual PDT, MicroTIM, Profibus modules
• Instrumentation: water/nitrogen flow monitors, pressure indicators, temperature transmitters
• Ancillary equipment: quick connectors, adaptors, connector plugs, Drynert fluid supplies

Service and Support

Edwards provides comprehensive service solutions including overhaul and repair with OEM parts, rapid spare parts dispatch, remanufactured products, global field engineer network, extended warranties, and Expert Advantage Service Plans for operational efficiency.

Contact Information

Global contact details for Edwards offices in Europe, USA, Brazil, Israel, and Asia Pacific are provided for customer support.

Critical Information Highlights

• Careful consideration of pump dimensions and installation options is essential for site layout and access.
• Performance curves with purge options are critical for selecting the correct pump model.
• Accessories optimize pump performance, protection, and monitoring.
• Inlet filters and isolation valves significantly extend pump life and protect processes.
• Noise reduction silencers are available for installations with strict acoustic requirements.
• Ordering codes enable customization to application needs including purge levels and electrical configurations.
• Comprehensive service and support ensure long-term reliability and cost efficiency.