Orders & Support: +44 (0) 1543 500 044
Orders & Support: +44 (0) 1543 500 044
Our own-brand MegaCold water vapour cryopumps are the most cost effective addition to an existing vacuum system or as part of a vacuum pumping solution for new systems. It can dramatically reduce pump down times and significantly improve product quality and throughput. In production this means more cycles per day.
Typically 50-100% throughput improvements are achievable. MegaCold products work on the principle of Meissner trapping, whereby water vapour is captured by condensing onto a cryogenically cooled surface (a cryocoil) that is placed inside the vacuum chamber so pumping is not limited by pumping ports.
The MegaCold range is controlled by an industry standard PLC with a touchscreen local interface for ease of use and graphing of current or historic data. It has a full set of remote options. The equipment is available in a range of configurations including single & dual output cooling circuits giving independent control over a cryocoil and baffle.
The Megacold is a cryogenic closed loop refrigeration system used to capture water vapour in a vacuum system. Generally, pumps are not very effective at removing moisture and can be limited by the pumping port size. By using the Megacold, pumpdown speed is improved as well as the ultimate vacuum level achieved.
They are used across a range of applications to improve product quality and process speed by allowing more production runs within a day. Industries include thin-film, semiconductor, automotive, medical, ophthalmic, food & beverage, aerospace, and defence. Examples of the applications include the production of car headlights, food packaging, and jet engines.
Selecting and sizing the appropriate model for the application is dependent on many variables. Based on our years of experience we have established some baseline principles to simplify this task. Typically, when adding water vapour pumping on an open load system, pump down times are reduced in the range 50-75%. To accomplish this, we take existing Water Vapour Pumping speed of the pumping system (in chamber) and multiply by a minimum factor of 4. Taking this value we are able to determine the cryocoil surface area. Knowing the ultimate vacuum level of the process chamber we can look up the coil temperature required from the featured table. Now knowing the temperature required we can determine the cooling capacity required and select the appropriate model. Allowances may need to be made for any additional heat sources within the chamber or if the Cryopump is placed a significant distance from the vacuum chamber.
In addition to the standard features found on the MegaCol units, the following component can be manufactured to your specification as required:
Cryocoil
The cryocoil will be designed to fit the specific vacuum chamber, based on information you supply, or you may choose to design and build your own cryocoil. Typical cryocoils have helical, spiral, serpentine or other simple shapes.
Feedthrough
The standard cryogenic feedthrough provides thermal isolation between the feed/return tubes and the O-ring seal. The dual pass feedthrough requires a two-inch diameter hole in the vacuum chamber.
Refrigerant line
A standard refrigerant line set consists of a copper feed and return line, each with stainless steel couplings on both ends for connection to the MegaCold unit and to the feedthrough. Optional vacuum insulated lines are available if required.
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| MegaCold™ 12A
| MegaCold™ 20A
| MegaCold™ 32A
| MegaCold™ 50A
|
| Power requirements | 380v - 460v, 50/60Hz | |||
| Maximum power (KW)
| 9.7
| 11.7
| 14.1
| 18.1
|
| Electric current (A)
| 17.7
| 21
| 24
| 31
|
| Theoretical max pumping speed (l/s)
| 89,400
| 149,000
| 238,400
| 372,500
|
| Conservative Pump Speed (l/s)
| 60,000
| 100,000
| 160,000
| 250,000
|
| Maximum Cooling Capacity (w)
| 1,500
| 2,100
| 3,200
| 4,000
|
| Cryocoil Tube Length (M)
| 12
| 20
| 32
| 50
|
| Cryocoil Surface m2
| 0.6
| 1
| 1.6
| 2.5
|
| Pre-Cooling Time (Min)
| 25 | |||
| Cooling Time (Min)
| <3
| <3
| <4
| <5
|
| Defrost Time (Min)
| <3
| <3
| <3;
| <3
|
| Return Cooled (Min)
| --
| --
| <5
| <5
|
| Cooling water max flow (l/min)
| 25
| 30
| 42
| 55
|
| Refrigerant
| Environmental mixed refrigerant
| HFC blend | ||
| Control Systems
| PLC + touch-screen interface | |||
| Dimensions A x B x C (mm)
| 750 x 850 x 1550
| 750 x 950 x 1650
| ||