... Material: Carbon steel Valve body: 20 mm to 220 mm. Standard: ASTM, JIS, BS, DIN Taiwan technic, more professionalThe ... This series can be divided into standard type, heat sink type, low temperature type, sylphon sealed type, jacket insulated type, etc. Product nominal pressure (PN): ... workplaces, reaching the leakage level of Class IV.ZXMQ type of soft sealing structure spool has reached the leakage ...