Main specification PN(Mpa) shell test(Mpa) Seal test (Mpa) work TEMP. MEDIUM 1.0 1.5 1.1 ≤100℃ paper pulp, coal ,mixture... 1.6 2.4 1.8 ≤100℃ ◆ material of main part body bonnet disc stem sealing S.S. Carbon steel.. S.S. carbon steel S.S Rubber ,PTFE, ALLOY,S.S