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> Varian vankel VK808 vk-808 filter changer VK8000 8000
Varian vankel VK808 vk-808 filter changer VK8000 8000
This listing is for a filter changer, for a pill/tablet dissolution station.
* Make: Vankel (now part of Varian)
* Model / Part #: VK-808 (VK808)
* Description: Filter Changer
* Automatic filter changing between each sampling timepoint
* Special 25 mm filters designed for automation
* Standard nylon and PVDF filters other membrane materials available
* Pore sizes down to 0.45 m
The Filter Changer is used in conjunction with an autosampler such as the VK 8000. This unit can easily be added to an existing autosampler (a Syringe Pump and new chip for the VK 8000 are required).
The Filter Changer is available in two models. One version is designed to filter six, seven or eight lines simultaneously as would typically be done when using the VK 8000. Another version utilizes a single line and is used with the VK 8000. In this setup, only one filter is placed in line. In this application, a sequential injection onto an HPLC column is filtered prior to injection.
The Filter Changer can store up to 200 filters at a time. The filters come prepackaged in tubes of 25 for easy loading.
When used with the VK 8000, all of the parameters are set using the VK 8000 keypad. The sequence of events is as follows:
* The Filter Changer is in line between the Syringe Pump and the VK 8000.
* Once the sampling manifold is lowered, a multichannel Syringe Pump pulls media from the vessel.
* A series of pulls is required to fill the lines of the VK 8000.
* Once the lines are full, the valves in the VK 8000 are opened and the Syringe Pump fills the tubes or vials in the sample tray with filtered sample.
* The valves in the VK 8000 are then closed and the remaining media in the line is pushed from the lines.
* Then the filters are ejected from the lines and new filters are rotated into position.
You are assured of the proper sample being withdrawn due to the accuracy of the Syringe Pumps. These syringes have an accuracy of 2% when used with the Filter Changer and 1% when used without the Filter Changer.
You can order the Filter Changer to retrofit existing VK 8000s. For these systems a new chip is installed in the VK 8000 and the unit is retrofitted with a Syringe Pump to replace the existing Peristaltic Pump.
Varain's online product page is located at http:// /cgi-bin/nav?products/dissolution/systems/fc&cid=LKNPLNILFJ
