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.