ZJHJ pneumatic membrane angle control valve is specially used in medium viscosity, easy to crystallize, containing suspended particles, 90 degree bend joint, because the angle control valve angle valve body has no dead angle, easy to purge, maintenance is simple and widely used. Single-seat or balanced sleeve discs can be used, and multi-stage adjustment is also available in some differential pressure applications. Multi-spring pneumatic membrane mechanism or electric actuator can be selected.