Double, pusher design used in applications where no emissions of hazardous pumped product can be tolerated. Seal uses inert gas barrier, such as nitrogen or clean shop repair, for lubrication. Eliminates contamination of pumped product by a buffer fluid. Provides total containment, even if outer seal fails. Extremely reliable and economical alternative to seal less pump.

Type of seal: Double, pusher design,

Pressure: To 200 psig (1380 kPa)

Temperature: To 250F (121C)

Velocity: To 2600 fpm (13 mps)

Standard sizes: 1” to  2¾”