Building off its long history of pneumatic controllers, Emerson offers its first zero-bleed controller offering: the Fisher™ 4680 pilot controller. This fully-mechanical instrument provides customers in the midstream and downstream natural gas industry a reliable and versatile option for performing pressure control regulation with a sliding-stem or rotary control valve while achieving zero emissions in the steady state.
主要功能
Zero steady state emissions.
Modular construction allows for direct and reverse configurations.
Simplified tuning with intuitive setpoint screw and deadband adjustment drum.
