Pharmatek Filtration Systems Pvt. Ltd manufactures Self Contained Automatic Air Shower. Pharmatek Filtration Systems Pvt. Ltd is an ISO 9001:2000 certified company offering a wide range of Laminar Flow Work Station, Air filters, Prefilters and other Clean Air Equipments. The Self Contained Automatic Air Shower is available in varying sizes to suit site conditions and is designed to deliver a spray of HEPA filtered air of approximately 6000 FPM from adjustable nozzles in the ceiling.