Diffusion Pumps Catalog

Diffusion Pumps Catalog
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Diffusion Pumps Catalog

Product catalog summary
Features and Benefits
Agilent diffusion pumps offer customizable options such as Halo or custom baffles to minimize backstreaming and a Quick Cool Coil to reduce cycle times. They are designed for easy maintenance with features like a sight glass and gauge port for troubleshooting. The pumps are optimized for high throughput, pressure stability, and minimal backstreaming, providing a low cost of ownership due to efficient power usage and durable construction. Agilent also offers world-class service, training, and support to maximize system uptime and productivity.
Typical Applications
Agilent diffusion pumps are used in various applications including vacuum furnaces, metallizing, large area coating, thin film deposition, and molecular beams. They are favored for their high throughput, low backstreaming, and ability to handle high gas loads, making them suitable for continuous production and developmental systems.
Pump Models
The document details various pump models such as AX-65, HS-2, VHS-4, and others, highlighting their specifications like pumping speed, maximum throughput, forepressure, backstreaming rate, warmup and cooldown times, fluid charge, and electrical requirements. Each model is designed to meet specific operational needs, with options for different voltages and configurations.
Fluids and Baffles
Agilent provides various diffusion pump fluids like Santovac 5 and DC-704, along with internal baffle kits to enhance pump performance by reducing backstreaming and improving efficiency.
Technical Notes
The document includes technical specifications and performance graphs for different pump models, explaining measurements of pumping speed and backstreaming. It also provides ordering information for accessories and replacement parts, ensuring users can maintain and optimize their pump systems effectively.
Overview
This document provides detailed information on diffusion pumps, including specifications, fluid types, and ordering information. It also covers technical notes on the operation and design features of diffusion pumps.
Specifications
The document specifies that ISO pump versions include an inlet flange o-ring but do not include a foreline flange centering ring. It also mentions that diffusion pumps are controlled for export by the Nuclear Suppliers Group, requiring an export license from the U.S. Department of Commerce.
Fluids
Agilent offers various diffusion pump fluids, including NEOVAC SY, DC-702, DC-704, DC-705, and Santovac 5. Each fluid has specific chemical compositions, ultimate pressures, vapor pressures, viscosities, molecular weights, boiling temperatures, flash points, and thermal stability. Santovac 5 is recommended for leak detectors due to its ultra-low vapor pressure and cleanliness.
Ordering Information
The document provides part numbers and weights for different fluid types and container sizes, including NEOVAC SY, Dow Corning DC-702, DC-704, DC-705, and Santovac 5.
Baffles and Cold Caps
Water-cooled baffles and extended cold caps are available for various diffusion pump models. These components help reduce backstreaming and maintain pump speed. Technical specifications and ordering information are provided for each type.
Technical Notes
Diffusion pumps operate by transferring momentum from high-velocity vapor molecules to gas molecules. The document discusses the history, applications, and basic performance factors of diffusion pumps. It also explains the operation process, including the importance of rough pumping and maintaining proper heat and forepressure.
Design Features
Agilent diffusion pumps have unique design features, such as ejector stages, insulated jet drip shields, and water-cooled cold caps, which enhance performance and reduce backstreaming. The pumps also incorporate quick cool boiler coils and thermal protection switches.
Pumping Fluids
Effective pumping fluids must have high molecular weight and low vapor pressure at elevated temperatures. The document discusses the properties and synthesis of these fluids.
Introduction to Phenyl Ethers
Phenyl ethers like Neovac-SY and Santovac-5 are resistant to oxidation, making them suitable for use around electronic devices. They form a conducting film when exposed to electrons, preventing static charge build-up. Neovac-SY is cost-effective, while Santovac-5 is more durable with a lower vapor pressure.
Diffusion Pumps
The document discusses the performance of diffusion pumps, highlighting four operational regions: pressure ratio limit, normal operating range, throughput limitation, and backing pump effect. A typical performance plot is provided.
Silicone Fluids
Silicone fluids, such as DC-704 and DC-705, offer additional oxidation resistance. DC-705, with a lower vapor pressure, is suitable for low-pressure applications but less effective under high throughput conditions compared to DC-704.
Fluorinated Polyphenyl Ether
Fomblin® or Krytox is stable under reactive conditions and is used in mechanical oil-sealed pumps for handling large amounts of oxygen.
Speed Measurements
Speed values are measured according to ISO Standard 1608/1, differing from previous methods. The new method results in a 40% lower measured speed. Speed is calculated using the formula S = Q / (P – P0), where Q is the flow rate and P0 is the ultimate pressure.
Backstreaming Measurements
Backstreaming is measured using a dome method as per AVS Standard 4.5. The rate is determined by collecting condensed pumping fluid over a 72-hour period. The use of baffles can significantly reduce backstreaming.
Using Baffles
Baffles or traps are recommended to reduce backstreaming in sensitive applications. Options include water-cooled halo baffles, optically dense baffles, and cryotraps. The choice depends on the trade-off between backstreaming reduction, speed, size, and cost.
Estimating Baffle Effect on Pump Speed
The effective pumping speed with a baffle is estimated using the formula Seff = (Cbaffle * Spump) / (Cbaffle + Spump), where Cbaffle is the conductance of the baffle.
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Catalog excerpts

Diffusion Pumps Catalog-1

Agilent Diffusion Pumps 2-3 Typical Applications Pump Models Technical Notes

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Diffusion Pumps Catalog-2

Diffusion Pumps Features and Benefits Agilent has earned its position as the leading diffusion pump manufacturer in the world by listening to customer needs and by continuously improving the performance and reliability of our benchmark designs. Throughout our more than forty years of leadership in the industry, we have consistently produced pumps that provide the most efficient means of converting heat into pumping throughput. Our experience has allowed us to optimize the design of every element of the pump. As a result, Agilent diffusion pumps offer you the lowest cost of ownership available...

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Diffusion Pumps Catalog-3

Diffusion Pumps World-class Service, Training and Support Agilent’s application consulting capability makes use of our unparalleled experience to identify the optimal solution for you. And we invite you to take advantage of our industry leading worldwide service and support programs and award winning vacuum training classes to maximize system uptime and productivity. Diffusion Pumps Low Cost of Ownership By providing the highest throughput available per unit of power, reduced cooling water requirements, and rugged, durable stainless steel construction, Agilent delivers large volume pumping at...

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Diffusion Pumps Catalog-4

Typical Applications Courtesy of Mill Lane Engineering Courtesy of Materials Research Furnaces, Inc. As the worldwide diffusion pump market leader, Agilent produces the most comprehensive family of pumps, ranging from 2 in. to 35 in. in diameter, and is the only broad-line, U.S.-based manufacturer. Diffusion pumps are in wide use because they have several advantages: They are reliable, simple in design, operate without noise or vibration, and are relatively inexpensive to operate and maintain. In fact, diffusion pumping is still the most economical means of creating high-vacuum environments....

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Diffusion Pumps Catalog-5

Diffusion Pumps Diffusion Pumps for large area coating systems. The large pumps used in this application come equipped with sight glass and drain assemblies and are also available with ASA or ISO flanges. Vacuum Furnaces Vacuum furnace applications require pumps that are capable of achieving stable pressures in high gas flow environments. Additionally, furnace operators need shorter cycle times to accomplish efficient processing of heat-treated material batches. Coatings (Optical, Electronics, Protective) With low ultimate pressure, high speed, high throughput and high tolerable forepressure,...

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Diffusion Pumps Catalog-6

Previous model number Pumping speed*, l/s (operating range) Air Helium & hydrogen Pumping speed AVS 4.1 (1963)* Maximum forepressure, Torr (mbar) No load Full load Maximum throughput, T-l/s (mbar-l/s) In operating range @1 x 10-2 Torr (1.3 x 10-2 mbar) Minimum recommended backing pump for maximum throughput, cfm (m3/hr) Warmup time, minutes Cooldown time, minutes with quick cool coil, where applicable Backstreaming rate at inlet flange mg/cm2/min (standard cold cap)* Fluid charge Electrical requirements Power, watts Cooling water, U.S. gpm (l/hr) at 60-80 °F (15-26 °C) ** For descriptions of...

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Diffusion Pumps Catalog-8

Pump Models Agilent AX-65 Dimensions: inches (millimeters) Technical Specifications Pumping speed*, operating range Maximum throughput Compression ratio Operating range Maximum forepressure Backstreaming rate** Recommended backing pump Warmup time Cooldown time Fluid charge Electrical requirements Pump power Air cooling 65 l/sec air, 90 l/s He and H2 0.19T-l/s (0.25 mbar-l/s) in operating range, 0.30T-l/s (0.40 mbar-l/s) @ 0.01 Torr 4 x 107 (air), 2 x 106 (helium) 3 x 10-3 to <5 x 10-8 Torr (3.9 x 10-3 to 6.5 x 10-8 mbar) No load: 0.75 Torr (1.00 mbar) Full load: 0.60 Torr (0.78 mbar) With cold...

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Diffusion Pumps Catalog-9

Diffusion Pumps AX-65 - Pumping Speed - Air/N2 Throughput (Torr-l/sec) Inlet pressure (Torr) Pumping speed/Cold cap Pumping speed/Halo baffle Throughput Ordering Information Description AX-65 with standard cold cap, 115 V, 250 W AX-65 with internal baffle, 115 V, 250 W AX-65 with standard cold cap, 220 V, 250 W AX-65 with internal baffle, 220 V, 250 W AX-65 with standard cold cap, 115 V, 200 W AX-65 with internal baffle, 115 V, 200 W AX-65 with standard cold cap, 220 V, 200 W AX-65 with internal baffle, 220 V, 200 W AX-65 with standard cold cap, 90 V, 250 W AX-65 with internal baffle, 90 V, 250...

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Diffusion Pumps Catalog-10

Pump Models Agilent HS-2 .84 DIA O.D. (21.3) Dimensions: inches (millimeters) Technical Specifications Pumping speed, operating range Pumping speed*, AVS 4.1 (1963) Maximum throughput Operating range Maximum forepressure Recommended backing pump Backstreaming rate**, standard cold cap Warmup time Cooldown time Fluid charge Electrical requirements Pump power Cooling water requirements Water connections 160 l/s air, 200 l/s He and H2 285 l/s air 0.60 T-l/s (0.80 mbar-l/s) in operating range, 0.70 T-l/s (0.93 mbar-l/s) @ 0.01 Torr 3.7 x 10-3 to < 5 x 10-8 Torr, (4.9 x 10-3 to < 6.5 10-8 mbar) No...

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Diffusion Pumps Catalog-11

Diffusion Pumps HS-2 Pumping Speed - Air/N2 Inlet pressure (Torr) Pumping speed Throughput Ordering Information Description With standard cold cap, 120 V With standard cold cap, 240 V Description Water-cooled baffle with ASA flanges Santovac 5 diffusion pump fluid, 500 cc pump fluid, 500 cc DC-702 diffusion pump fluid, 500 cc DC-704 diffusion pump fluid, 500 cc DC-705 diffusion pump fluid, 500 cc Instruction manual Replacement Parts (one heater required per pump) 350 W, 120 V heater (HS2A) 1.0 (0.5) 350 W, 240 V heater (HS2A) 1.0 (0.5) 450 W, 120 V heater 1.0 (0.5) 450 W, 240 V heater 1.0 (0.5)...

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Diffusion Pumps Catalog-12

Pump Models Agilent VHS-4 Dimensions: inches (millimeters) Technical Specifications Pumping speed*, operating range Pumping speed*, AVS 4.1 (1963) Maximum throughput Operating range Maximum forepressure Recommended backing pump Backstreaming rate**, standard cold cap Warmup time Cooldown time Fluid charge Electrical requirements Pump power Cooling water requirements Water connections 750 l/s air, 940 l/s He/H2 1,200 l/s air 1.5 T-l/s (2.0 mbar-l/s) in operating range, 2.5 T-l/s (3.2 mbar-l/s) @ 0.01 Torr 2 x 10-3 to <5 x 10-9 Torr (2.7 x 10-3 to <6.5 x 10-9 mbar) No load: 0.65 Torr (0.86 mbar)...

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