Its synthetic seating material provides a bubble-tight seal to prevent migration

reducing diagnostic and installation labor

this is a designated York OEM part

ensuring compatibility with most standard thermostats and actuators

providing a tight close-off in high-head pressure systems

Armstrong Fluid Technology 89975001-83702K Seal 321894-708 Its synthetic seating material providesThe Armstrong Fluid Technology 89975001 83702K Seal is a precision engineered silicon carbide mechanical seal designed for high performance fluid handling. This shaft seal replacement is the direct successor to the 89975001 837, offering enhanced durability for abrasive environments. Built to handle abrasive glycol and high temperature water applications, the 89975001 83702K features silicon carbide faces that provide exceptional hardness and wear