vacuum pump system system included (1) s316 stainless steel double stage liquid ring vacuum pump ex proof (T4), (1) 316 stainless steel (1.4571) shell and tube heat exchanger, serial # 11940 rated shell side -1/6.2 bar @ 250 degrees C, volume 46 liter, rated tube side -1/6.2 bar @ 250 degrees C, volume 30 liter. (1) 316 stainless steel receiver.