Valve Stem Packing Product Type Valve Stem Packing Overall Length 3 in Ambient Temperature - Maximum 500 Degrees F Pressure for Pumps - Maximum 500 psi pH - Maximum 14 pH External Coating Not Applicable Temperature in Steam - Maximum 500 Degrees F Standards FDA Approved Seal Material PTFE Shaft Speed - Maximum Not Rated pH - Minimum 0 pH Packing Seal Size 7/32 sq in Pressure for Valves - Maximum 500 psi Ambient Temperature - Minimum -400 Degrees F Color White