A6H Space Simulators
Bemco offers up-to-date space simulators incorporating all of the preferred features needed for reliable combined temperature and high vacuum testing.
The A6H series includes a fully integrated and appropriately sized PCL-III Portable Liquid Chiller utilizing liquid nitrogen for cooling. The PCL-III is mounted within the A6H system structure and permanently attached to the chamber thermal shroud. Mechanical cooling is available as an option. Please see the PCL section of this Web Site for additional information.
HPG-II High Pressure Gas Conditioners can be substituted for the standard PCL-III Portable Liquid Chiller if nitrogen gas circulation in the thermal shroud is desired. Bemco HPG Conditioners are similar to the Bemco PTS Portable Temperature Conditioners except they are designed for continuous operation at up to two atmospheres (29.4 psia) of pressure. This higher base operating pressure doubles the gas density per cfm of circulating gaseous nitrogen allowing the use of smaller connecting tubes while also increasing thermal capability. Please see the HPG section of this Web Site for additional information.
Each A6H system includes:
- A machined, 304 Series stainless steel vacuum vessel designed in accordance with the ASME code. Interior chamber surfaces are ground smooth and polished for low emissivity and to minimize outgassing.
- A replaceable “O” ring seal.
- Testing with a helium mass spectrometer sensitive to 1 x 10 -9 Torr.
- Exterior chamber reinforcement, enclosures, and structures, with the exception of the door sealing face, made from high strength steel and carbon steel finished with a preventative primer and a Bemco Blue overcoat.
- An optically dense, electropolished, right angle elbow to support the pump stack and protect the face shield on the cryopump from excessive thermal load.
- A high conductance pneumatic aluminum slide valve to isolate the cryopump.
- A matching cryopump with a regeneration heater and a digital cryo-array temperature indicator.
- Two, 3 inch ASA style, access ports.
- Pneumatic roughing and cryopump isolation valves.
- A rotary vane pump roughing system with a heated regeneration molecular sieve foreline filter.
- Two Convectron digital display gauge controllers and tubes, one on the roughing foreline and one on the cryopump roughing line.
- A Stabil-Ion gauge controller and tube. One unit is standard. Additional Stabil-Ion gauge tubes to act as a backup, if needed, are available as an option.
- High vacuum rated vacuum system components.
- Automatic electrical interlocks to assure proper vacuum system operation.
- Six cold plate hard points to support an optional base plate test item frame and four roof mounted hard points.
- A Bemcoil thermal shroud with a stepped plate baffle at the rear of the workspace. The inside of the shroud is finished with a high vacuum rated paint with an emissivity in excess of 0.93. A door shroud plate is included and the interior workspace is optically dense. Covers are furnished for all penetrations.
The photo at left illustrates a standard A6H control panel complete with a microprocessor based, programmable, 1/4-DIN solid state, 256-step ramping temperature controller with a 4-line LCD interface display and a large red LED display. This instrument includes an RS232 and RS485 interface. The protocol is Modbus™. LabVIEW™ drivers are available. Also shown are Factory Mutual Approved high and low temperature safety controls with audible and visual alarms, added at no extra cost, and a Brooks Automation, Granville Phillips 375 Convectron Gauge Controller with its gauge tube.
The Granville Phillips 375 Convectron Gauge Controller is an industry standard that all similar gauges are compared to. This instrument includes individual gauge calibration by Granville Phillips, an easy to read 3 digit green LED display that automatically ranges, and optionally, an RS232 or RS485 interface. In addition there is a Stabil-Ion gauge controller and a graphic panel to allow convenient monitoring of system status.
Standard A6H Models
Model |
A | B |
C |
D |
Temperature
(1) |
Pressure
(2) |
A6H4 |
18 | 45.7 | 24 | 61 | -55 to +150 C |
5 x 10-6 Torr |
A6H6 |
24 | 61.0 | 24 | 61 | -55 to +150 C | 5 x 10-6 Torr |
A6H10 |
24 | 61.0 | 36 | 91.4 | -55 to +150 C | 5 x 10-6 Torr |
A6H15 |
30 | 76.2 | 36 | 91.4 | -55 to +150 C | 5 x 10-6 Torr |
A6H20 |
30 | 76.2 | 48 | 121.9 | -55 to +150 C | 5 x 10-6 Torr |
A6H28 |
36 | 91.4 | 48 | 121.9 | -55 to +150 C | 5 x 10-6 Torr |
A6H35 |
36 | 91.4 | 60 | 152.4 | -55 to +150 C | 5 x 10-6 Torr |
A6H48 |
42 | 106.7 | 60 | 152.4 | -55 to +150 C | 5 x 10-6 Torr |
A6H63 |
48 | 121.9 | 60 | 152.4 | -55 to +150 C | 5 x 10-6 Torr |
A6H75 |
48 | 121.9 | 72 | 182.9 | -55 to +150 C | 5 x 10-6 Torr |
| Code |
Description
|
| A |
Inside Diameter, Inches |
B |
Inside Diameter, cm |
C |
Inside Length, Inches |
D |
Inside Length, cm |
A6H Table Notes:
- Standard temperature range is based on a PCL-III Portable Fluid Chiller system range circulating d-Limonene using liquid nitrogen for cooling. Mechanical cooling and High Pressure Gas (HPG) using nitrogen gas with either liquid nitrogen cooling or mechanical cooling is optional.
- The pressure quoted is the working pressure. Ultimate pressure with a clean, dry, and empty system is 5 x 10-7 Torr. Higher ultimate vacuums using bakeout, dual or metal seals, and other high vacuum techniques are optionally available.
