Self-priming centrifugal pump for liquefied gases
The pumps usually used to handle liquefied gases, such as ammonia, liquefied petroleum gas (LPG) and refrigerants, are self-priming with a side-channel design from this company’s TBH or TBA series. The suction and discharge casings of these pumps are designed to withstand higher pressures (up to 40 bars) and the pumps are able to transfer liquids with the presence of gas. In particular the TBA (photo), with an additional centrifugal stage at the suction, achieves very low net positive suction head (NPSH) values and it is particularly suitable for pumping fluids close to their boiling point. To ensure no leakage to the outside when handling toxic and hazardous fluids, the company’s magnetic drive pump (TBK or TBKA series) is an alternative to pumps with double mechanical seals. — Pompetravaini S.p.A., Castano Primo, Italy