The SBFS system performs all thebasic functions of a buffer/barriersystem for the operation of doubleseals: to pressurize the buffer chamber leakage compensation buffer/barrier fluid is circulated bythermosiphon effect or forced circulation system to cool the seal to selectively absorb product leakageand prevent dry running (tandem arrangement)Use compressed air or nitrogen forpressurization; pressurization ismonitored by a pressure switch.The incorporated level switch issues asignal whenever the level ofbuffer/barrier fluid is too low.