Low Particle(LP) poppet valve was field tested and proven to improve yield in a harsh or corossive environment such as Etch or CVD processes. The entire mechanisms are shielded and completely cleared from gas flow, thus creating a very clean environment. Can be installed upstream of the chamber if necessary. Sizes available in 1.0″, 1.5″ and 2.0″. To specify LP style, add -LP at the end of part number. Example: AVP-KF25-LP.