BBZS1 and BBZS5 are by-pass sanitary valves designed to be used in various types of applications in various industrial sectors. Adjustment of the pressure seal is intended to meet various applications and uses in different industrial sectors, as a feature of suitable versatility. The valves’ opening pressure is regulated via an internal spring, pre-loaded using an adjustment ring placed inside the protective cover (BBZS1), or in the pneumatic version (BBZS5). The pneumatic control features the advantage of being able to open the valve automatically for washing process. Explosion proof version available.