Application scopes: Regulate and control the negative pressure that is used to assist venous drainage in the sealed venous blood reservoir during bypass. Features: Negative pressure regulation and monitoring are carried out simultaneously. Control range: -60~-20 mmHg. Tianjin Welcome Medical Equipment Co., Ltd. Add: Building 2, No. 19 Micro 4 Road, Microelectronics Industrial Area, TEDA, 300385, Tianjin, R R. China