NPT CONNECTION CAPSULE FILTER. Capsule filter with NPT fittings are widely used in pharmaceutical industries. Filter media available in PES,PTFE.PVDF,NYLON and Polypropylene. Micron ratings available in 0.2um.0.45um,1um,3um,5um, 10um,20um and 30um. Maximum operating pressure: Liquid 6bar@ 25°C, Gas: 4.1bar@25 °C. Minimum burst pressure:8.5bar