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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Limit Switches

Limit Switches: electrical switches which may be applied to manual or automated valves to signal that the valve cycle has been completed. When applied to manual or pneumatically actuated valves, it is most common to provide two switches in a Nema-rated enclosure. Each switch is activated by an adjustable tripping device driven by the actuator or valve system. Normally one switch is adjusted to trip in the open position and one is adjusted to trip in the closed position. Optional additional switches are available to perform other functions (i.e., pump start-up or shut-down). All electric actuators have Open/Close limit switches.