Here we have provided comprehensive lists of commonly asked questions regarding our fluidics products and related applications. This information is designed to support your inquiries, but if you don’t find the answers you are looking for we encourage you to contact us for further assistance.
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If the needle seal located in the rotor seal is not sealing around the needle, some of the sample will come out of the injection port. The outer diameter and length of the needle must be the correct size for the valve in order for the needle seal to function. If the OD and needle length are correct, the needle seal may have expanded through frequent use. The needle seal can be reformed by pushing down on the needle guide, which in turn pushes on the seal and closes it up.
Note: Never use a beveled, pointed, or tapered needle. Always use a square cut needle. This can permanently damage the rotor seal and stator face assembly.