The Delta single cartridge product family offers a range of designs that targets 85% of the non-cartridge world population by adapting to U.S. ANSI and European DIN standards for pump seals without pump modifications. Delta's cartridge single seals provide value laden design features with superior leading edge technologies, such as narrow face technology and finite element analysis, at competitive price levels to set the standard for all other cartridge seal manufacturers to attempt to achieve. End users can benefit from dramatic seal maintenance cost reductions on two levels. First, an affordable high technology cartridge seal for conversion of packed stuffing boxes without modification, non-cartridge seals and old high cost / low technology design cartridge seals. Second, the use of design features with benefits that provide maximized seal performance in 90% of all seal applications with resulting long term seal maintenance cost control and reduction.	Double seals and Tandem seals are required for process fluids containing abrasive slurries or hazardous / toxic chemicals and require an externally supplied barrier buffer fluids to pressurize, lubricate and cool the Inboard and Outboard seal faces. The Delta double cartridge product family targets 85% of the non-cartridge world population by adapting to U.S. ANSI and European DIN standards for pump seals without pump modifications. Delta's double cartridge seals provide value laden design features with superior leading edge technologies, such as advanced pumping feature designs and finite element analysis, at competitive price levels to set the standard for all other cartridge seal manufacturers to attempt to achieve. End users can benefit from dramatic seal maintenance cost reductions on two levels. First, an affordable high technology cartridge seal for conversion of packed stuffing boxes without modification, non-cartridge seals and old high cost / low technology design cartridge seals. Second, the use of design features with benefits that provide maximized performance in 90% of all seal applications with resulting long term seal maintenance control and reduction.	Only two major components assemble and install in three easy steps setting a new standard for split seal ease of installation. New design eliminates installation problems commonly associated with current designs! The gland and rotary unit come preassembled; seal installation takes minutes! The gland has all components, including the stationary seal face, preinstalled. The rotating unit has all components, including: the rotary seal face, preinstalled. Seal available in off the shelf rugged heavy duty gland casting with robust face and rotary construction in sizes from 1.437" to 5.250". Provides reliable operation and eliminates assembly and installation related failures. Accommodates the widest range of applications with cost effective availability. .