FAS Type W1 John Crane® Type 9 Replacement FeaturesSpecificationsQuote Request Features Technical Features Unbalanced Multi-spring Bi-directional Dynamic PTFE wedge Specifications Materials ROTARY FACES: Carbon Graphite, Silicon Carbide, Tungsten Carbide STATIONARY SEATS: Ceramic, Silicon Carbide, Tungsten Carbide PTFE wedge METAL PARTS: 316 SS SPRINGS: Hastelloy C-276 Operating Parameters Dimensions: 0.500” – 4.000” Max Pressure: 150 PSI / 10 BAR Max Temperature: 160°C / 320°F Velocity: 22.5 M/S – 4500 FPM Quote Request Request A Quote