Dual Cartridge Version of 609 High Temperature Metal Bellows Seal
The inboard seal is designed to run with either ID or OD pressure and in the case of the 3609 the barrier is pressurised above suction pressure of the pump. The out board seal is balanced for OD pressure only and has a pumping scroll incorporated in the drive collar to provide circulation of the barrier fluid.
To comply with the requirements of API 682 pumping scrolls can be incorporated on the inboard seal to accommodate plan 23 cooling of the product and occasionally connections and throttle bushing may be applied to the outboard seal to allow the use of a steam quench.
High Performance edge welded metal bellows, Temperature range of -70 oC to 425 oC without the need to condition the process fluid, Speeds up to 25m/s, Pressures upto 25 Bar with a single ply bellows and 69 Bar with double ply bellows, Patented nested ripple bellows with 45 degree tilt angle for reduced stress and improved fatigue life. Self cleaning non clogging design. API 682 qualified seal. Options of Carbon / Tungsten Carbide / Silicon Carbide faces. High Quality Silicon Carbide seats.