Manufacturer: John Crane
Low emission, High pressure O ring Shaft Seal for Light Hydrocarbon Services
Type 48 seals evolved from the successful, proven John Crane Type 8B1 design, the preferred choice for safe, reliable, unpressurized tandem and pressurized dual seal arrangements in petroleum services for more than four decades. The Type 48 is a dependable, engineered mechanical seal developed specifically for single seal installations to attain MACT (Maximum Achievable Controllable Technology) compliance in light hydrocarbons and other VOCs (volatile organic compounds). Type 48 single seals control emissions to less than 500 ppm. Available in cartridge or optional shaft mounted seal arrangement.
Industrial applications involved in the processing of VOCs and similar hazardous materials
Lubrication liquids, aqueous solutions, chemicals, light hydrocarbons and water services
• Type 48 sealing package - Type 48 seals are application specific with the proper selection of primary ring, mating ring materials and flush arrangement.
• Computer optimized seal faces - computer modeling minimizes thermal and pressure caused distortion. For optimal performance, face materials are specified antimony filled carbon graphite versus silicon carbide as standard.
• Flush maximizes cooling - available with an extended flush with single point injection and a large percentage of the mating ring exposed to the process fluid for cooler running. For higher heat loads, a distributed flush with improved heat transfer characteristics is recommended.
TEMPERATURE LIMITS40°F to 500°F/ 40°C to 260°C
PRESSURE LIMITS300 psi(g)/20.7 bar(g) process pressure