Inverted Bucket Traps have remained popular with the process industries for years. Spirax IB's can be serviced on-line and are best suited for the continuous removal of condensate from high pressure heat exchangers, In-built strainers are standard.  Thermodynamic Traps The thermodynamic design was patented by Spirax in 1953 : today it is still the world's most versatile and reliable trap. Their compact design features a mirror-polished, differently hardened disc and seat for long life and a tight seal. They also provide excellent resistance resistance to water hammer.