Pneumatic internal thread ball valve is Roland Valve's introduction of foreign advanced technology based on updated design, carefully manufactured products. It is powered by compressed air. The valve stem rotates the valve body by 90° in the valve body, and it can realize valve commutation and one-in two-out or two-into-one function. The product's sealing performance is divided into metal seal and soft seal. It has the advantages of compact structure, small size, good sealing, reliable operation, easy maintenance, easy installation and strong adaptability.