The coal chemical control valve has bad working conditions, high temperature, frequent opening and closing, large opening and closing pressure difference, dry friction of coal powder and easy locking, which cause the valve to fail to open or close. The comprehensive requirements for the actuator are very high, the main shaft is easily deformed or even broken, the seal is prone to failure and air leakage, and the valve cannot be switched or the switching time is slow due to long-term use. Bigtork is equipped with multiple torque test benches to ensure that the torque of the actuator is truly up to standard. The cylinder barrel is processed with 3 precision grinding processes and thickened hard chrome plating. Seals, grease, shaft material and heat treatment are all in accordance with high standards. It is required to be selected to ensure the safety of use in harsh working conditions.

For some working conditions that require quick cutoff, Bigtork can meet the emergency cutoff requirements of user devices through special gas circuit design and unique module configuration.

Bigtork actuators and control systems can customize flexible fire domes, metal fire domes and other fire protection solutions to work in fire or extremely high temperature environments. In the control of ESD emergency shutdown system, the use of low-temperature fusible accessories can automatically reset the valve to a safe position according to the design requirements when a fire occurs.

For some important control valves (including emergency shut-off valves) that keep running in a certain state for a long time, due to the long-term "dormancy" state, they may not be able to respond to the operating instructions of the SIS (safety instrumented system) in emergency situations, resulting in the failure of the SIS system. Brings risks and hazards to safety. PST Partial Stroke Testing is a very good safety measure to set up periodic partial stroke action tests to ensure proper operation of the control valve.

The control system is an important part of the actuator, which can realize various functional requirements of the actuator. Bigtork has extensive experience in meeting the various needs of users in switching control, frequent regulation control and ESD (emergency shutdown) control. Bigtork provides industry-leading control accessories and control accessories designed and manufactured by us, including limit switches, quick exhaust valves, hydraulic manual modules, broken pipe protection systems, and travel limiting devices.