The 97/98-21000 series pneumatic single seat regulating valve is composed of the 21000 series single seat valve imported from Masoneilan Company in the United States and a self-developed pneumatic diaphragm multi spring actuator. It has the characteristics of small and lightweight actuator, as well as the wide application, good stability, and small leakage of the 21000 series single seat valve. It is one of the ideal pneumatic regulating valve products used in automatic control of industrial processes such as petroleum, chemical, and metallurgical industries.

Note: The flange connection standard follows ANSI B16.5-1981
Socket welding and threaded connection standards shall be in accordance with ANSI B16.11-1980
Welding connection standard according to ANSI B16.25-1979