ACTUATORS
• Electric
• Pneumatic
• Hydraulic
• Electro-hydraulic

VALVES
• Control
• Butterfly
• Ball and Gate
• Plug

POSITIONERS
• Pneumatic
• Electric Pneumatic

LIMIT SWITCHES

MANUAL VALVE GEARING
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Control Valves

Control Valves:  a valve used to automatically maintain a constant flow rate. They can be controlled by a calibrated flow meter or temperature and pressure gages. The gages can be preset to the desired flow rate. When the actual flow rate varies from the preset value, the gages will adjust the flow. These devices are used in complex chemical and petrochemical plants where manual adjustment of flow is not feasible, since there may be thousands of such valves.