Pneumatic and Electronic Controls - ControlAir
We provide various products, including valves, motion control, electrical enclosures, HMIs, power tools, and electric control systems. In addition to these products, we offer compressed air products to power pneuma...
Categories from ControlAir (2)
Control Relays
Control relays are electrical devices that control and switch electrical circuits in industrial automation and control systems. These relays act as electromechanical switches, allowing a low-power control signal to control a higher-power circuit. Control relays are commonly used to control motors, solenoids, lights, and other electrical loads. They provide reliable and efficient control by isolating the control circuit from the higher-voltage or higher-current circuits. Control relays are available in various configurations, such as electromechanical and solid-state relays, offering different features and capabilities. They play a crucial role in automating processes, ensuring proper sequencing, and enhancing the safety and reliability of control systems.
Related categories: Motor Control | Soft Starters | Contactors | Motor Control Parts | Manual Starters
Rotary Actuators
Rotary actuators turn air or electric power into rotation for turning, indexing, flipping and operating valves. They're common in automation for rotating parts, opening gates and positioning tools.
Rotary Actuator Types
- Rack and pinion – precise angles and high torque
- Vane actuators – compact and lightweight
- Rotary tables – handle offset loads
- Electric rotary actuators – programmable positions
Choosing an Actuator
Calculate torque from load and inertia, select rotation angle and consider cushioning for smooth stops. Position sensors confirm end points.
Centro supplies rotary actuators for automation and valve control.
Related categories: Pneumatic Cylinders and Actuators | Linear Cylinders | Pneumatic Cylinder | Clamps | Electric Linear Actuator
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The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$371.20
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$371.20
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
US-CAB-1/2 BEARING KIT
$99.68
Low Stock (1)Ships within 1 business day
US-CAB-3/4 BEARING KIT
$135.14
Low Stock (5)Ships within 1 business day
High pass or low pass pneumatic selecting relay. The Super Mite 71 will automatically select the higher or lower of two pneumatic inputs and pass it downstream while blocking the other. Capable of almost instantaneous selection, the Super Mite 71 can separate pressure differentials as low as a tenth of a psi. Although ordered as either high or low pass, the Super Mite 71 can easily be converted in the field from one to the other. The Super Mite 71 can be relied on to open or close valves when a signal pressure drops or rises past a determined value. They can also be used to prevent a valve from opening or closing beyond a critical point.
$374.35
Available for Purchase
Subject to factory lead times
High pass or low pass pneumatic selecting relay. The Super Mite 71 will automatically select the higher or lower of two pneumatic inputs and pass it downstream while blocking the other. Capable of almost instantaneous selection, the Super Mite 71 can separate pressure differentials as low as a tenth of a psi. Although ordered as either high or low pass, the Super Mite 71 can easily be converted in the field from one to the other. The Super Mite 71 can be relied on to open or close valves when a signal pressure drops or rises past a determined value. They can also be used to prevent a valve from opening or closing beyond a critical point.
$374.35
Available for Purchase
Subject to factory lead times
MITE 71 REPAIR KIT
$230.77
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
MITE 74 REPAIR KIT HI TRP/HI
$411.27
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$371.20
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$371.20
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders.
$511.65
Available for Purchase
Subject to factory lead times
US-CAB-1/2 BEARING KIT
$99.68
Low Stock (1)Ships within 1 business day
US-CAB-3/4 BEARING KIT
$135.14
Low Stock (5)Ships within 1 business day
High pass or low pass pneumatic selecting relay. The Super Mite 71 will automatically select the higher or lower of two pneumatic inputs and pass it downstream while blocking the other. Capable of almost instantaneous selection, the Super Mite 71 can separate pressure differentials as low as a tenth of a psi. Although ordered as either high or low pass, the Super Mite 71 can easily be converted in the field from one to the other. The Super Mite 71 can be relied on to open or close valves when a signal pressure drops or rises past a determined value. They can also be used to prevent a valve from opening or closing beyond a critical point.
$374.35
Available for Purchase
Subject to factory lead times
High pass or low pass pneumatic selecting relay. The Super Mite 71 will automatically select the higher or lower of two pneumatic inputs and pass it downstream while blocking the other. Capable of almost instantaneous selection, the Super Mite 71 can separate pressure differentials as low as a tenth of a psi. Although ordered as either high or low pass, the Super Mite 71 can easily be converted in the field from one to the other. The Super Mite 71 can be relied on to open or close valves when a signal pressure drops or rises past a determined value. They can also be used to prevent a valve from opening or closing beyond a critical point.
$374.35
Available for Purchase
Subject to factory lead times
MITE 71 REPAIR KIT
$230.77
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
Snap-acting control relay with integral 3-way valve. The Mite 74 combines the Mite 70 control relay with a precision 2-way or 3-way valve in a single compact package. Either an increasing, decreasing or remote signal can be used to channel air as needed. The Mite 74 can also be used in combination with either of the Super Mite 71’s so that it will trip when either of two signals drops or rises beyond a set pressure. Once tripped, the Mite 74 will hold its settings until the proper control signal is reestablished and the reset button is pushed.
$928.19
Available for Purchase
Subject to factory lead times
MITE 74 REPAIR KIT HI TRP/HI
$411.27
Available for Purchase
Subject to factory lead times
FAQS
- Selecting the right pneumatic cylinder starts with defining the four core parameters of your application. Define four core parameters: bore size (force output = pressure × piston area, plus a 25–50% safety factor), stroke length (match to required travel, avoid excess), mounting style (fixed, flange, or pivot to suit your mechanical arrangement), and environment (standard, washdown, or food-grade seals). Speed is controlled by external flow valves, not cylinder selection. For precise positioning, consider a guided or rodless cylinder with position sensing rather than a standard unit.
- A soft starter ramps voltage at startup to limit inrush current and reduce mechanical shock, then steps aside once the motor reaches full speed. Use one when smooth starting is your only requirement. A VFD controls motor speed continuously throughout operation, making it the right choice whenever the process needs variable speed — conveyors, pumps, fans — and it delivers significant energy savings in centrifugal applications. If you only need a gentle start, use a soft starter. If you need speed control at any point during operation, invest in a VFD.
- PLCs are purpose-built for industrial environments — they tolerate heat, vibration, and electrical noise while executing control logic in deterministic millisecond scan cycles. They replace hardwired relay logic with reprogrammable software, making process changes fast and inexpensive. Built-in diagnostics centralize fault visibility and cut troubleshooting time. Modern PLCs integrate with HMIs, SCADA, and enterprise networks via standard protocols, enabling real-time data collection. Modular architecture means the system scales as the application grows.
- Start with the NEMA or IP rating: NEMA 1 for basic indoor use, NEMA 4/4X for washdown and outdoor exposure (4X adds corrosion resistance), NEMA 7/9 for hazardous classified locations. Size the enclosure with 20–30% spare interior space for future additions and adequate heat dissipation. Choose material based on environment — painted steel for standard indoor use, stainless for washdown or chemical exposure, fiberglass for highly corrosive areas. Verify any required certifications (UL, CSA, ATEX) before specifying.
- Solenoid valves are electrically actuated and can be triggered instantly by a PLC or control system, making them essential for automated, repeatable, or high-cycle applications. Manual directional control valves require a person to physically shift the valve and are appropriate for infrequent operations, manual overrides, or applications with no control system. In practice, most automated systems use solenoid valves for normal operation with a manual override built in for setup, maintenance, and emergency use. If the valve must respond to a signal, cycle repeatedly, or operate unattended, solenoid is the correct choice.