Actuation and Engineered Products
Actuation refers to the process of causing something to move or operate. This can be achieved by using an actuator, a device that converts a source of energy into motion. There are two types of actuators: linear ac...
Categories in Actuation & Engineered Products - Precision Solutions for Performance (6)
Actuators
Actuators are devices that convert energy into motion. They come in various shapes and sizes and can be powered by electricity, hydraulics, or pneumatics. Centro carries a complete selection of general actuators, including electric actuators, pneumatic actuators, and polymer actuators. We also offer a wide range of linear actuators, which are ideal for use in small spaces. No matter what the application, there is an actuator that can provide the perfect solution. Centro carries a complete selection of general actuators available to purchase online, making it easy to find the right product for any project.
Regulators
Regulators are devices that control the pressure of gases and liquids. Centro carries a complete selection of regulators available to purchase online, including compress air regulators, FRL compressed air regulators, and air regulators. Our compress air regulators are designed to maintain a constant output pressure, even as the input pressure changes. Our FRL compressed air regulators are ideal for applications where the inlet pressure is unstable or unknown. And our air regulators can be used to adjust the flow rate of gases. We have the perfect solution for your commercial or industrial application. Please browse our website today to find the suitable regulator for your needs.
Transducers
Transducers are devices that convert energy from one form to another. Pressure transducers are devices that convert pressure into an electrical signal. Signal transducers convert an electrical signal into another form of energy. Centro carries a complete selection of transducers available to purchase online. Centro's transducers are available in different models and sizes to suit your application needs. Whatever your transducer needs, Centro has the products to get the job done. Please browse our website today to learn more about our complete selection of transducers.
Washdown Systems
At Centro, we offer a full range of washdown systems designed to keep your facility clean and compliant. Whether you’re in food processing, manufacturing, or any industry that requires strict sanitation, we have the equipment to get the job done.
Our selection includes high-pressure hoses, nozzles, pumps, compact foamers, and sanitizing stations—everything you need to tackle tough grease, grime, and contaminants. A well-designed washdown system not only makes cleaning more efficient but also helps prevent the spread of bacteria and other pathogens.
Not sure what you need? Our experts are here to help you choose the right equipment for your operation. Plus, with our easy-to-navigate online store, you can find and order everything in one place.
Browse our selection today and upgrade your washdown process with the best solutions available.
Volume Boosters
Volume boosters are vital components used to amplify the output signals of control systems, enhancing their effectiveness in driving larger actuators or valves. These devices enable quicker response times and improved performance in various industrial applications by providing precise pressure control.
Positioners and Limit Switches
Positioners and limit switches are crucial in various industrial applications, ensuring precise control and safety measures. Positioners are devices designed to accurately control the position of a valve or actuator in response to an input signal. They are commonly used in pneumatic and hydraulic systems to regulate the flow of fluids or gases by adjusting the opening and closing of valves. Positioners enable operators to precisely control the process variables, such as flow rate or pressure, improving industrial operations' efficiency and accuracy. On the other hand, limit switches serve as safety devices that detect the presence or absence of an object and trigger an action when a predetermined limit is reached. These switches are often employed to monitor the position of mechanical components, such as valves, actuators, or machine parts, and ensure that they operate within safe limits. Limit switches can signal the end of travel, prevent overtravel, or initiate emergency shutdown procedures in case of abnormal conditions, enhancing operational safety and protecting equipment from damage. Positioners and limit switches contribute to the reliability, precision, and safety of industrial processes across various sectors, including manufacturing, petrochemicals, and utilities.
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81-20518-DCH TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20518-DCH, Standard Enclosure, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20518-DCH
$347.48$357.00
Available for Purchase
Subject to factory lead times
81-20523-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL, Extended Sensing, Model: 81-20523-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20523-A2
$520.73$535.00
Available for Purchase
Subject to factory lead times
81-20524-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20524-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20524-A2
$520.73$535.00
Available for Purchase
Subject to factory lead times
81-20524-A3 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20524-A3, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20524-A3
$535.32$550.00
Available for Purchase
Subject to factory lead times
81-20524-A4 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20524-A4, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20524-A4
$553.82$569.00
Available for Purchase
Subject to factory lead times
81-20526-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20526-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20526-A2
$466.22$479.00
Available for Purchase
Subject to factory lead times
81-20526-A3 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20526-A3, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20526-A3
$480.82$494.00
Available for Purchase
Subject to factory lead times
81-20528-8DD TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20528-8DD, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20528-8DD
$1,263.36$1,298.00
Available for Purchase
Subject to factory lead times
81-20528-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20528-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20528-A2
$418.53$430.00
Available for Purchase
Subject to factory lead times
81-20528-A3 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20528-A3, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20528-A3
$433.13$445.00
Available for Purchase
Subject to factory lead times
The TopWorx DVR Switchbox is a reliable, durable switchbox solution for use in confined spaces and across a wide range of industries, including water and wastewater, industrial utilities and food and beverage. Designed to be flexible and adaptable, this unit performs well in challenging conditions. Its patented cam design also makes the commissioning process quick and easy, while its direct-flush mount capabilities ensure secure linkage and operation.
Requires Quote
Available for Purchase
Subject to factory lead times
The TopWorx DX PST switchbox with HART® protocol is a reliable, user-friendly solution for performing Partial Stroke Test and Emergency Shut Down for critical applications. Units provide valuable valve data and diagnostic information, relaying feedback to Industrial Internet of Things (IIoT) systems via digital and analog signals. Expanded options for sensor redundancy up to 4 GO™ Switches and pilot redundancy up to 2 integrated pilots all protected within a single enclosure .Thanks to the integrated PST button, operators can test valves without any additional devices, simplifying maintenance.
Requires Quote
Available for Purchase
Subject to factory lead times
TopWorx™ DX-Series Controllers are certified for use in every world area.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
Requires Quote
Available for Purchase
Subject to factory lead times
The TopWorx™ DXR packs all the versatility of the single platform DXP into a rugged, corrosion-proof Valox® resin enclosure. The DXR is perfect for use in corrosive environments.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
Requires Quote
Available for Purchase
Subject to factory lead times
The TopWorx™ DXS is a 316 stainless steel valve controller that combines bus networking, pilot valve, and position sensors into a single globally certified, explosion proof enclosure that attaches to any automated valve package.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
Requires Quote
Available for Purchase
Subject to factory lead times
TopWorx™ ESD Valve Controllers provide a complete Partial Stroke Test Solution with unique features and functionality that enable partial stroke testing of emergency shutdown valves without disrupting or shutting down the process.
Requires Quote
Available for Purchase
Subject to factory lead times
The DXN discrete valve monitor is qualified for use in containment and is the best solution for quarter-turn AOVs. It contains two GO Switches to give open/close indication, a ceramic terminal block and it mounts onto the actuator.
Requires Quote
Available for Purchase
Subject to factory lead times
The GO™ Switch Model 11 features sealed gold flashed contacts, no-touch sensing and snap action response in a square switch design with a 3/8™ sensing range.
Requires Quote
Available for Purchase
Subject to factory lead times
A slight modification to an all-time favorite, model 12 was designed to meet ATEX/IECEx Zone 1, Ex ’de’ flameproof and increased safety hazardous area classification.
Requires Quote
Available for Purchase
Subject to factory lead times
Offering the same features as the GO™ Switch Model 11, The Model 21 GO™ Switch provides a smaller design. All GO™ Switch wiring options include A/C, D/C, N/O or N/C, consumes no power to operate and has no current leakage or voltage drop.
Requires Quote
Available for Purchase
Subject to factory lead times
A lower profile version of model 12, model 22 is also available with ATEX/IECEx Zone 1, Ex ’de’ flameproof and increased safety hazardous area classification in a smaller package.
Requires Quote
Available for Purchase
Subject to factory lead times
TopWorx™ 52M is a low profile, dry contact, proximity sensor with a 316L sensing face in an industry standard 12mm package. The 52M does not require power to operate and is polarity insensitive with zero need to specify NPN or PNP circuits and maintains the ability to be a plug-and-play replacement for inductive proximity sensors. Also, the 52M can handle a wide current range from 5mA to 2A @ 24VDC and a wide temperature range from -40°F to 212°F (-40°C to 100°C).
Requires Quote
Available for Purchase
Subject to factory lead times
A lower profile version of model 12, model 22 is also available with ATEX/IECEx Zone 1, Ex ’de’ flameproof and increased safety hazardous area classification in a smaller package.
Requires Quote
Available for Purchase
Subject to factory lead times
The GO™ Switch Model 72 has the smallest diameter (3/8") of any round leverless limit switch, and is used extensively in factory automation applications.
Requires Quote
Available for Purchase
Subject to factory lead times
81-20518-DCH TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20518-DCH, Standard Enclosure, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20518-DCH
$347.48$357.00
Available for Purchase
Subject to factory lead times
81-20523-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL, Extended Sensing, Model: 81-20523-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20523-A2
$520.73$535.00
Available for Purchase
Subject to factory lead times
81-20524-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20524-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20524-A2
$520.73$535.00
Available for Purchase
Subject to factory lead times
81-20524-A3 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20524-A3, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20524-A3
$535.32$550.00
Available for Purchase
Subject to factory lead times
81-20524-A4 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20524-A4, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20524-A4
$553.82$569.00
Available for Purchase
Subject to factory lead times
81-20526-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20526-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20526-A2
$466.22$479.00
Available for Purchase
Subject to factory lead times
81-20526-A3 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: CSA, Extended Sensing, Model: 81-20526-A3, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20526-A3
$480.82$494.00
Available for Purchase
Subject to factory lead times
81-20528-8DD TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20528-8DD, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20528-8DD
$1,263.36$1,298.00
Available for Purchase
Subject to factory lead times
81-20528-A2 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20528-A2, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20528-A2
$418.53$430.00
Available for Purchase
Subject to factory lead times
81-20528-A3 TopWorx GO Switch, Dry Contact Proximity Sensor / Leverless Limit Switch - Ferrous or Magnetic Target , Certification: UL General Purpose, Extended Sensing, Model: 81-20528-A3, Stainless Steel, Regional Cert: n/a, PNP, NPN, NO, NC, No Power Consumption - 81-20528-A3
$433.13$445.00
Available for Purchase
Subject to factory lead times
The TopWorx DVR Switchbox is a reliable, durable switchbox solution for use in confined spaces and across a wide range of industries, including water and wastewater, industrial utilities and food and beverage. Designed to be flexible and adaptable, this unit performs well in challenging conditions. Its patented cam design also makes the commissioning process quick and easy, while its direct-flush mount capabilities ensure secure linkage and operation.
Requires Quote
Available for Purchase
Subject to factory lead times
The TopWorx DX PST switchbox with HART® protocol is a reliable, user-friendly solution for performing Partial Stroke Test and Emergency Shut Down for critical applications. Units provide valuable valve data and diagnostic information, relaying feedback to Industrial Internet of Things (IIoT) systems via digital and analog signals. Expanded options for sensor redundancy up to 4 GO™ Switches and pilot redundancy up to 2 integrated pilots all protected within a single enclosure .Thanks to the integrated PST button, operators can test valves without any additional devices, simplifying maintenance.
Requires Quote
Available for Purchase
Subject to factory lead times
TopWorx™ DX-Series Controllers are certified for use in every world area.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
Requires Quote
Available for Purchase
Subject to factory lead times
The TopWorx™ DXR packs all the versatility of the single platform DXP into a rugged, corrosion-proof Valox® resin enclosure. The DXR is perfect for use in corrosive environments.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
Requires Quote
Available for Purchase
Subject to factory lead times
The TopWorx™ DXS is a 316 stainless steel valve controller that combines bus networking, pilot valve, and position sensors into a single globally certified, explosion proof enclosure that attaches to any automated valve package.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.
Engineered with our GO Switch sensing technology, our D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.
Requires Quote
Available for Purchase
Subject to factory lead times
TopWorx™ ESD Valve Controllers provide a complete Partial Stroke Test Solution with unique features and functionality that enable partial stroke testing of emergency shutdown valves without disrupting or shutting down the process.
Requires Quote
Available for Purchase
Subject to factory lead times
The DXN discrete valve monitor is qualified for use in containment and is the best solution for quarter-turn AOVs. It contains two GO Switches to give open/close indication, a ceramic terminal block and it mounts onto the actuator.
Requires Quote
Available for Purchase
Subject to factory lead times
The GO™ Switch Model 11 features sealed gold flashed contacts, no-touch sensing and snap action response in a square switch design with a 3/8™ sensing range.
Requires Quote
Available for Purchase
Subject to factory lead times
A slight modification to an all-time favorite, model 12 was designed to meet ATEX/IECEx Zone 1, Ex ’de’ flameproof and increased safety hazardous area classification.
Requires Quote
Available for Purchase
Subject to factory lead times
Offering the same features as the GO™ Switch Model 11, The Model 21 GO™ Switch provides a smaller design. All GO™ Switch wiring options include A/C, D/C, N/O or N/C, consumes no power to operate and has no current leakage or voltage drop.
Requires Quote
Available for Purchase
Subject to factory lead times
A lower profile version of model 12, model 22 is also available with ATEX/IECEx Zone 1, Ex ’de’ flameproof and increased safety hazardous area classification in a smaller package.
Requires Quote
Available for Purchase
Subject to factory lead times
TopWorx™ 52M is a low profile, dry contact, proximity sensor with a 316L sensing face in an industry standard 12mm package. The 52M does not require power to operate and is polarity insensitive with zero need to specify NPN or PNP circuits and maintains the ability to be a plug-and-play replacement for inductive proximity sensors. Also, the 52M can handle a wide current range from 5mA to 2A @ 24VDC and a wide temperature range from -40°F to 212°F (-40°C to 100°C).
Requires Quote
Available for Purchase
Subject to factory lead times
A lower profile version of model 12, model 22 is also available with ATEX/IECEx Zone 1, Ex ’de’ flameproof and increased safety hazardous area classification in a smaller package.
Requires Quote
Available for Purchase
Subject to factory lead times
The GO™ Switch Model 72 has the smallest diameter (3/8") of any round leverless limit switch, and is used extensively in factory automation applications.
Requires Quote
Available for Purchase
Subject to factory lead times
FAQS
- The right actuator type depends on your application's speed, force, control precision, and environment. Pneumatic actuators use compressed air and are the most common choice for on/off valve service — they are fast, simple, reliable, and inherently safe in hazardous areas since they produce no electrical sparks. Electric actuators convert electrical energy into mechanical motion and offer precise positioning, modulating control, and easy integration with digital control systems — ideal for applications requiring accurate throttling or remote operation where compressed air is not available. Hydraulic actuators deliver the highest force output in the most compact size, making them the choice for very large valves or high-pressure applications where pneumatic or electric actuators cannot generate sufficient torque. Also consider the fail-safe requirement: pneumatic spring-return actuators provide inherent fail-open or fail-close capability on loss of air supply, while electric actuators require battery backup or a spring-return mechanism for fail-safe operation.
- Fail-open and fail-close describe what position the valve moves to when the actuator loses its power source — air supply for pneumatic actuators or electrical power for electric actuators. A fail-close actuator drives the valve to the fully closed position on loss of signal or power, which is critical in applications where an uncontrolled open valve could release hazardous materials or cause a safety incident. A fail-open actuator drives the valve to the fully open position on loss of power, which is essential in cooling water systems, relief paths, or any application where flow must continue during a power failure. The fail-safe action is typically achieved with a spring-return mechanism — compressed springs store energy and drive the actuator to the safe position when air or power is removed. Selecting the correct fail-safe mode is one of the most important safety decisions in valve automation and must be defined during the engineering phase based on a process hazard analysis.
- Valve automation replaces manual handwheel or lever operation with an actuator — pneumatic, electric, or hydraulic — that opens, closes, or modulates the valve in response to signals from a control system. You should automate a valve when the application requires remote operation from a control room, fast or precise response to process changes, frequent cycling that would be impractical by hand, operation in hazardous or hard-to-reach locations, or integration into an automated process sequence controlled by a PLC or DCS. An automated valve package typically includes the valve body, actuator, mounting hardware (often to ISO 5211 standard), and accessories such as solenoid valves for pneumatic control, positioners for modulating service, and limit switches for position feedback. Automating even a few critical valves in a process can significantly improve safety, consistency, and throughput while reducing the labor required for routine operations.
- ISO 5211 is an international standard that defines the flange dimensions, bolt patterns, and drive interfaces for mounting actuators to quarter-turn valves such as ball valves, butterfly valves, and plug valves. It matters because it enables interchangeability — an ISO 5211 compliant actuator from one manufacturer can be mounted directly onto an ISO 5211 compliant valve from a different manufacturer without custom adapters or machining. The standard specifies a series of flange sizes (F03 through F40) that correspond to increasing torque capacities and valve stem dimensions. When specifying an actuator, matching the ISO 5211 flange pattern to the valve ensures a bolt-on fit with proper alignment between the actuator drive and the valve stem. This standardization reduces lead time, simplifies spare parts management, and makes future actuator replacements straightforward because the mounting interface remains the same regardless of brand.
- Sizing an actuator requires matching the actuator's torque output to the valve's torque requirement with an appropriate safety factor. Start by obtaining the valve's required operating torque from the valve manufacturer — this includes the breakaway torque (force needed to unseat the valve from fully closed), the running torque (force to move the valve through its travel), and the dynamic torque (force from fluid pressure acting on the disc or ball during operation). The actuator's available torque must exceed the highest of these values by a safety factor — typically 25% to 50% above the maximum required torque to account for friction increase over time, temperature effects on seals, and supply pressure variations. For pneumatic actuators, torque output varies with supply air pressure, so always calculate at the minimum expected air supply pressure, not the nominal. For electric actuators, verify the torque rating at the specific voltage available. Undersized actuators stall or fail to close tightly; oversized actuators waste energy and can damage valve seats and stems.