vacuum pump system system included (1) 316 stainless steel double stage liquid ring vacuum pump ex proof (G3), (1) 8.5 square meter 321 stainless steel (1.4541) shell and tube heat exchanger, serail # 7033/71, mfd by GESSNER GmbH, Germany, rated shell side -1/6.2 bar @ 350 degrees C, volume 89 liter, rated tube side -1/6.2 bar @ 350 degrees C, volume 56 liter. (2) s/steel reciever.