PSB21/B21

● Pressure：0~3.0 MPa

● Temperature：-120~400℃

● Speed：≤25m/s

√ Ideal for cryogenic and high temperaturemedium with higher safety requirements

√ Secondary seal as a safety seal, preventing media directly leaking into the atmospheric

√ Rotary bellows to prevent medium particles from depositing between wave plates , self-cleaning function

● Welded metal bellows, rotary

● Compaction installation

● Flexible graphite as secondary seal

√ Refinery& petrochemical

√ Coal chemical

√ Chemical

● Process side:API682 PLAN 11, 13, 14, 21, 23, 32

● Between seals:API682 PLAN 52, 53A, 53B, 53C, 54, 55

● Atmospheric side:API682 PLAN 61, 62