Limit switches: For remote position indication & sequencing.

• Electric or pneumatic
• Watertight or explosion proof
• SP-DT or DP-DT
• Low power
• AS-Interface and Device Net

Pressure switches: A device which transmits an electrical signal at a preset pressure.

Positioners: Utilize plant air as the power source to precisely position an actuator relative to a control signal (such as 3 to 15 psig instrument air) from a remote device.

Transducers: Convert an electrical control to a pneumatic control signal (e.g., 4 to 20 ma 3 to 15 psig).

Filters and lubricators: Filters are recommended when the condition of plant or instrument air could affect the performance of control devices. Lubricators are recommended in all systems not operated by positioners.

Solenoid valves: For remote electrical actuation:

• General purpose or explosion proof
• Voltage (AC or DC)
• 2-way
• 3-way (1 for spring return actuator)
• 4-way (1 for double acting actuator)
• Maximum pressure and temperature

Pneumatic pilot valves: For remote pneumatic actuation.

Check valves and shuttle valves: To allow flow in only one direction or to divert flow to another direction.

Quick exhaust valves: To permit fast opening and/or closing by exhausting the cylinder directly to atmosphere.

Speed control valves: To throttle the air flow to and from the actuator to meet the operational characteristics of the system.

Regulators and relief valves: To regulate the supply pressure to the actuator.