Advantage Seal Type 91B Replaces:
John Crane® Type 59B,
AESSEAL® M04U,
Eagle Burgmann® BT-C56.KB,
VULCAN® 1659B
Type 91B mechanical seal for pump is widely used, and it is a multi-spring PTFE wedge mechanical seal, which is used for general medium and low pressure work in processing, oil refining and petrochemical industries. Various materials are selected and combined to meet different media conditions. Widely used in corrosive, low-temperature and high-temperature applications.
Single seal, multi spring,balanced, arbitrary rotation, PTFE wedge seal
Design standard： DIN 24960 ISO 3069 API 610
A. A versatile design with multiple material options for the widest range of liquids and temperatures.
B. Optimized design with hydraulically balanced seal face gives low face loading at high pressure.
C. Maximum face surface exposure to liquid for heat dissipation.
D. Multiple S-rings ensure even face loading while compensating for acceptable shaft misalignment.
Pressure：p1 = 50 bar (725 PSI)
Temperature：t = -50 °C … 400 °C
Sliding velocity：vg = 25 m/s (82 ft/s)
Corrosive solvents, low and high temperature solvents.
Compact design permits use in all types of rotating equipment centrifugal pumps, mixers and agitators.
Type 91
Type 81
Type 37F
Type 81B
Type 37
Type 846B
Type 846
Type 852
Type 850B
Type 850
