Seal-Procast Solutions-Procast Solutions

Double metal bellow seals

Performance capabilities:

● Pressure：0~3.0 MPa

● Temperature：-120~400℃

● Speed：≤25m/s

Descriptions:

√ Applied for cryogenic and high temperature condition

√ Prevent medium leaking into the atmospheric

√ Compact designs, resistance for pump housing evacuation

Features:

● Welded metal bellows, rotary

● Shrink fitted seal face

● Compaction installation

● Flexible graphite as secondary seal

Recommended applications:

√ Refinery&Petrochemical

√ Coal chemical

Piping plans:

● Process side:API682 PLAN 01, 21, 32

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

● Atmospheric side:API682 PLAN 61, 62

Pumps Mechanical Seals - PSB21D

Categories	Components	Standard Materials	Optional Configurations (Depending on specific working conditions or applications)
Seal rings	Primary ring	Carbon graphite	TC
Seal rings	Mating ring	SiC	TC
Flexible elements	Metal bellows	Inconel718	Hast.C
Metal parts	Sleeve ,gland	316L	2205/17-4PH
Secondary seals	Rectangular ring	Flexible graphite	/