Valve Accessories
Valve accessories are additional components that enhance the functionality and performance of valves in fluid control systems. These accessories are designed to provide other features, improve safety, or simplify maintenance of the valves. Valve accessories enhance the reliability, efficiency, and safety of valve operations, making them essential for various industries such as oil and gas, chemical processing, water treatment, and power generation.
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The ASCO Series 290, also known as 8290, is a pressure-operated, direct acting angle-body piston solenoid valve built for demanding applications. Its straight-through body design is available in bronze or stainless steel. The valve is suitable for general service applications (air, inert gas, water, oil, and light slurries), plus steam, hot water, and auxiliary fluids within the food and beverage industry. Many optional features available including a visual/electrical position indicator or a stroke limiter.
Requires Quote
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Electronic Module Posiflow % Plug (MPN: 8908A001) is a genuine OEM replacement component designed for use with compatible ASCO solenoid valve and fluid control assemblies. Engineered to ASCO's rigorous quality standards, this part ensures a precise fit and reliable long-term performance in industrial automation, process control, and fluid handling applications.
$843.65$921.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Elec Cntl Module Asco Cntls % Plu (MPN: 8908A003) is a genuine OEM replacement component designed for use with compatible ASCO solenoid valve and fluid control assemblies. Engineered to ASCO's rigorous quality standards, this part ensures a precise fit and reliable long-term performance in industrial automation, process control, and fluid handling applications.
Requires Quote
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Solenoid Valve Replacement Coil (MPN: 97600274-1) is a coil rated for rated voltage, designed as a direct-fit replacement for compatible ASCO solenoid valves. This OEM-grade coil delivers consistent electromagnetic actuation for reliable fluid control in industrial, commercial, and process automation applications, and can restore valve operation without the cost of full valve replacement.
$730.07$797.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Tubing 1/4 Od X 45" Length Clr Nylon 12 Plastic Tube / Ridg (MPN: AP3499-001) is a genuine OEM replacement component designed for use with compatible ASCO solenoid valve and fluid control assemblies. Engineered to ASCO's rigorous quality standards, this part ensures a precise fit and reliable long-term performance in industrial automation, process control, and fluid handling applications.
$70.53$77.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 908 electronic control unit converts analog input control signals to the coil current of a proportional solenoid valve by means of pulse-width modulation. The switch-off function occurs at less than 2% of the maximum control signal. The control unit is suitable for proportional valve applications in the automotive, tire manufacturing, chemical, food and beverage, medical and life science, and packaging industries. Equipped with an engineered plastics body material.
Requires Quote
Available for Purchase
Subject to factory lead times
The ASCO Series 016 solenoid operator is the same highly reliable RedHat II molded epoxy solenoid operator used on ASCO's general purpose valves. Models are rated at 6.1 W and 9.1 W. Designed with a solenoid actuation, 50 Hz frequency, and 110 VAC voltage.
$1,145.94$1,251.00
Available for Purchase
Subject to factory lead times
The ASCO Series 016 solenoid operator is the same highly reliable RedHat II molded epoxy solenoid operator used on ASCO's general purpose valves. Models are rated at 6.1 W and 9.1 W. This valve is configured with a solenoid actuation, 60 Hz frequency, and 120 VAC voltage.
$1,145.94$1,251.00
Available for Purchase
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Configured with a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, brass body material, 50 Hz frequency, and 110 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Built for a 2 way - 2/2 normally closed valve function and solenoid actuation, this valve features a brass body material, 50 Hz frequency, and 115 VAC voltage.
$818.92$894.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. This valve comes with a 2 way - 2/2 normally closed valve function, solenoid actuation, 50 Hz frequency, 120 VAC voltage, and brass body material.
$818.92$894.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Designed with a brass body material, this model provides a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 50/60 Hz frequency, and 110/120 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Key details include a brass body material, 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 60 Hz frequency, and 120 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Equipped with a brass body material, this valve is configured with a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 50 Hz frequency, and 220 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. This model features a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 50/60 Hz frequency, 220/240 VAC voltage, and brass body material.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Specifications include a 2 way - 2/2 normally closed valve function and solenoid - direct acting actuation, with a brass body material, 60 Hz frequency, and 240 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Configured with a 2 way - 2/2 normally closed valve function, solenoid actuation, brass body material, 50/60 Hz frequency, and 440/480 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Built for a 2 way - 2/2 normally closed valve function and solenoid actuation, this valve features a brass body material, 60 Hz frequency, and 480 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. This valve comes with a 7/16" orifice, 3 way - 3/2 normally closed valve function, solenoid actuation, and 100 VAC voltage.
$1,597.54$1,744.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Designed with a 7/16" orifice, this model provides a 3 way - 3/2 normally closed valve function, solenoid - direct acting actuation, 50 Hz frequency, and 110 VAC voltage.
$1,341.97$1,465.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Key details include a 7/16" orifice, 3 way - 3/2 normally closed valve function, solenoid actuation, 60 Hz frequency, and 110 VAC voltage.
$1,597.54$1,744.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Equipped with a 7/16" orifice, this valve is configured with a 3 way - 3/2 normally closed valve function, solenoid actuation, 50 Hz frequency, and 115 VAC voltage.
$1,597.54$1,744.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. This model features a 7/16" orifice, 3 way - 3/2 normally closed valve function, solenoid - direct acting actuation, 50/60 Hz frequency, and 110/120 VAC voltage.
$1,341.97$1,465.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Specifications include a 3 way - 3/2 normally closed valve function, solenoid - direct acting actuation, and 7/16" orifice, with a 60 Hz frequency and 120 VAC voltage.
$1,341.97$1,465.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 290, also known as 8290, is a pressure-operated, direct acting angle-body piston solenoid valve built for demanding applications. Its straight-through body design is available in bronze or stainless steel. The valve is suitable for general service applications (air, inert gas, water, oil, and light slurries), plus steam, hot water, and auxiliary fluids within the food and beverage industry. Many optional features available including a visual/electrical position indicator or a stroke limiter.
Requires Quote
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Electronic Module Posiflow % Plug (MPN: 8908A001) is a genuine OEM replacement component designed for use with compatible ASCO solenoid valve and fluid control assemblies. Engineered to ASCO's rigorous quality standards, this part ensures a precise fit and reliable long-term performance in industrial automation, process control, and fluid handling applications.
$843.65$921.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Elec Cntl Module Asco Cntls % Plu (MPN: 8908A003) is a genuine OEM replacement component designed for use with compatible ASCO solenoid valve and fluid control assemblies. Engineered to ASCO's rigorous quality standards, this part ensures a precise fit and reliable long-term performance in industrial automation, process control, and fluid handling applications.
Requires Quote
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Solenoid Valve Replacement Coil (MPN: 97600274-1) is a coil rated for rated voltage, designed as a direct-fit replacement for compatible ASCO solenoid valves. This OEM-grade coil delivers consistent electromagnetic actuation for reliable fluid control in industrial, commercial, and process automation applications, and can restore valve operation without the cost of full valve replacement.
$730.07$797.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Tubing 1/4 Od X 45" Length Clr Nylon 12 Plastic Tube / Ridg (MPN: AP3499-001) is a genuine OEM replacement component designed for use with compatible ASCO solenoid valve and fluid control assemblies. Engineered to ASCO's rigorous quality standards, this part ensures a precise fit and reliable long-term performance in industrial automation, process control, and fluid handling applications.
$70.53$77.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 908 electronic control unit converts analog input control signals to the coil current of a proportional solenoid valve by means of pulse-width modulation. The switch-off function occurs at less than 2% of the maximum control signal. The control unit is suitable for proportional valve applications in the automotive, tire manufacturing, chemical, food and beverage, medical and life science, and packaging industries. Equipped with an engineered plastics body material.
Requires Quote
Available for Purchase
Subject to factory lead times
The ASCO Series 016 solenoid operator is the same highly reliable RedHat II molded epoxy solenoid operator used on ASCO's general purpose valves. Models are rated at 6.1 W and 9.1 W. Designed with a solenoid actuation, 50 Hz frequency, and 110 VAC voltage.
$1,145.94$1,251.00
Available for Purchase
Subject to factory lead times
The ASCO Series 016 solenoid operator is the same highly reliable RedHat II molded epoxy solenoid operator used on ASCO's general purpose valves. Models are rated at 6.1 W and 9.1 W. This valve is configured with a solenoid actuation, 60 Hz frequency, and 120 VAC voltage.
$1,145.94$1,251.00
Available for Purchase
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Configured with a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, brass body material, 50 Hz frequency, and 110 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Built for a 2 way - 2/2 normally closed valve function and solenoid actuation, this valve features a brass body material, 50 Hz frequency, and 115 VAC voltage.
$818.92$894.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. This valve comes with a 2 way - 2/2 normally closed valve function, solenoid actuation, 50 Hz frequency, 120 VAC voltage, and brass body material.
$818.92$894.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Designed with a brass body material, this model provides a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 50/60 Hz frequency, and 110/120 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Key details include a brass body material, 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 60 Hz frequency, and 120 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Equipped with a brass body material, this valve is configured with a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 50 Hz frequency, and 220 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. This model features a 2 way - 2/2 normally closed valve function, solenoid - direct acting actuation, 50/60 Hz frequency, 220/240 VAC voltage, and brass body material.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Specifications include a 2 way - 2/2 normally closed valve function and solenoid - direct acting actuation, with a brass body material, 60 Hz frequency, and 240 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Configured with a 2 way - 2/2 normally closed valve function, solenoid actuation, brass body material, 50/60 Hz frequency, and 440/480 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 200 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It is available in four standard wattages, AC or DC. Built for a 2 way - 2/2 normally closed valve function and solenoid actuation, this valve features a brass body material, 60 Hz frequency, and 480 VAC voltage.
$563.35$615.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. This valve comes with a 7/16" orifice, 3 way - 3/2 normally closed valve function, solenoid actuation, and 100 VAC voltage.
$1,597.54$1,744.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Designed with a 7/16" orifice, this model provides a 3 way - 3/2 normally closed valve function, solenoid - direct acting actuation, 50 Hz frequency, and 110 VAC voltage.
$1,341.97$1,465.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Key details include a 7/16" orifice, 3 way - 3/2 normally closed valve function, solenoid actuation, 60 Hz frequency, and 110 VAC voltage.
$1,597.54$1,744.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Equipped with a 7/16" orifice, this valve is configured with a 3 way - 3/2 normally closed valve function, solenoid actuation, 50 Hz frequency, and 115 VAC voltage.
$1,597.54$1,744.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. This model features a 7/16" orifice, 3 way - 3/2 normally closed valve function, solenoid - direct acting actuation, 50/60 Hz frequency, and 110/120 VAC voltage.
$1,341.97$1,465.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
The ASCO Series 329 is the same RedHat II molded epoxy solenoid operator used on general purpose ASCO valves. It has a 3-way solenoid operator and can be used with air, inert gas, water, and light oil media. The 329 Series enables equipment designers to use ASCO coils and operators in customized manifolds and equipment configurations. Specifications include a 3 way - 3/2 normally closed valve function, solenoid - direct acting actuation, and 7/16" orifice, with a 60 Hz frequency and 120 VAC voltage.
$1,341.97$1,465.00
Should ship between 17 Nov and 01 Dec
Subject to factory lead times
FAQS
- Valve accessories are additional components that enhance the functionality, safety, monitoring, and integration of valves in fluid control and automation systems. While the valve itself provides the basic flow control function, accessories extend its capabilities to meet the demands of modern automated process and manufacturing systems. Common valve accessories include solenoid connectors and cable assemblies (that provide the electrical connection between the control system and the solenoid coil on pilot-operated and solenoid valves), limit switches and position indicators (that confirm whether the valve is open, closed, or at an intermediate position and report that status back to the control system), mounting brackets and adapters (that allow valves to be installed on actuators, manifolds, or piping), manual overrides (that allow operators to manually actuate a valve during testing, commissioning, or control system failures), and speed controllers, flow sensors, and other inline accessories. Centro carries a range of valve accessories from multiple manufacturers to support the valves in their product line.
- Solenoid valve connectors are the electrical plug-and-cable assemblies that connect the solenoid coil on a valve to the plant's control wiring. They matter because a reliable electrical connection is essential for the valve to operate when commanded — a failed, corroded, or water-damaged connector can prevent the valve from energizing, causing process upsets, safety issues, or production downtime. Industrial solenoid connectors are available in standardized form factors (DIN 43650 Form A, B, and C are the most common, as well as M12 circular connectors) with different electrical ratings, ingress protection levels, and features. Key selection criteria include the voltage and current rating (must match the solenoid coil), the ingress protection rating (IP65 or IP67 for outdoor and washdown environments to prevent water and dust from reaching the electrical contacts), whether the connector includes a built-in LED indicator (for visual confirmation that the valve is energized), whether it includes a built-in surge suppression circuit (to protect the control system from voltage spikes when the solenoid de-energizes), and the cable length and type needed for the installation.
- Valve limit switches and position indicators are devices mounted on a valve or actuator that detect and report the valve's position (open, closed, or intermediate) back to the plant control system. They serve several important functions: confirming that the valve has actually reached the commanded position (so the control system knows the valve responded to its signal), providing input for safety interlocks (for example, verifying that an isolation valve is fully closed before allowing maintenance personnel to enter a confined space), triggering sequential operations (opening a downstream valve only after confirming the upstream valve has closed), and providing visual indication to operators in the field (colored dome indicators that show red for closed and green for open at a glance). Mechanical limit switches use a physical contact that is actuated by the valve stem or actuator shaft rotation. Proximity switches (inductive or magnetic) detect the valve position without physical contact, providing longer service life in high-cycle applications. Visual indicators provide a colored dome or flag visible from a distance.
- A manual override is a mechanical device built into a solenoid valve that allows an operator to manually actuate the valve without an electrical signal to the solenoid coil. It typically consists of a push button, push pin, or small lever accessible on the outside of the valve body. When pressed or turned, it mechanically shifts the valve's internal element to the actuated position, just as the solenoid would. Manual overrides are needed in several situations: during commissioning and testing when the control system may not yet be connected or programmed, the manual override allows technicians to verify that the valve and connected equipment function correctly. During control system failures or power outages, operators can manually operate critical valves to maintain safe plant conditions or perform an orderly shutdown. During troubleshooting, the manual override allows maintenance personnel to determine whether a valve problem is electrical (solenoid or wiring) or mechanical (stuck valve element) by testing the valve independently of its electrical circuit.
- A complete automated valve package typically includes the valve body, actuator, and several accessories that provide control, feedback, and safety functions. A solenoid pilot valve (if not integral to the actuator) provides the control air signal to operate the pneumatic actuator based on electrical commands from the control system. A valve positioner (for modulating/throttling applications) precisely positions the valve based on a 4-20 mA control signal. Limit switches or position indicators confirm the valve position and report it to the control system for interlock and sequence logic. A solenoid connector with appropriate IP rating, LED indicator, and surge suppression provides the electrical connection. Mounting brackets and hardware connect the accessories to the actuator. An air filter-regulator ensures clean, properly pressurized instrument air supply to the actuator and accessories. A manual override provides backup manual operation capability. Tubing and fittings connect the air supply, pilot valve, and actuator. The specific accessories needed depend on the application — simple on/off isolation may only need a pilot valve and limit switches, while modulating control requires a positioner and potentially a transducer as well.