valve actuators

A valve actuator is a device that opens or closes a valve. These components are the muscle behind precise HVAC and hydronic control. Whether regulating hot water flow or steam pressure, quality valve actuators deliver the consistent torque required for modern building automation.

Midwest Supply is your trusted partner for end-to-end HVAC solutions. We offer a complete selection of valves and actuators to contractors and experienced technicians working on specialized equipment and system installations. Our team delivers five-star customer service, and you can benefit from quantity discounts and free shipping on orders over $999.

Our fail-safe and non-fail-safe models are manufactured by global market leaders such as Belimo, Siemens and Honeywell, and range from 24 to 240 volts. Valve actuators are used in power plants, refineries, water and wastewater treatment plants and commercial HVAC systems to guide and control fluid flow through pipelines.

Fail-Safe Actuators for Critical Protection

Fail-safe actuators combine mechanical reliability with fail-safe operation. They compress or extend an internal spring using external power during normal operations. If power is lost or interrupted, the spring's stored energy is immediately released, driving the actuator valve back to a fail-safe position.

This fail-safe functionality prevents hazards, protects equipment and ensures operational security. Their reliable, automatic operation reduces manual intervention, simplifies control systems and boosts system performance and safety. Key applications of fail-safe actuators include Emergency Shutdown (ESD) systems, HVAC and fire safety, process control automation and subsea and marine operations.

Non-Fail-Safe and Electronic Actuation

Non-fail-safe actuators are electrical devices. When power is cut, the actuator remains in its current position until power is restored or a manual override is engaged. They offer highly precise control and modulation, which are crucial for applications that require exact positioning or incremental adjustments.

They can be more energy-efficient in applications where a position needs to be held for extended periods, as power is primarily consumed only when changing position. Applications include HVAC systems, water treatment, and industrial automation.

Pneumatic Valve Actuators and Electro-Hydraulic Solutions

If you're working on a legacy HVAC system with high force and torque requirements, Midwest Supply offers a wide range of actuator components for your exact needs. 

Pneumatic valve actuators use compressed air to generate mechanical motion, enabling them to open, close or position valves. They convert air pressure into linear or rotary force using components such as pistons or diaphragms and can be configured as fail-safe or double-acting. They offer speed, reliability and safe operation in explosive environments.

Electro-hydraulic actuators (EHAs) combine the power density of hydraulics with the precision of electrical systems. They simplify installation, reduce leak points, and handle high shock loads in harsh industrial conditions.

Shop Valve Actuators Online

Valve actuators are the muscles that enable hydronic control in HVAC systems. Whether regulating hot water flow or steam pressure, these components deliver the consistent torque required for modern building automation.

Browse our extensive selection of high-quality valve actuators from top brands like Belimo, Siemens and Honeywell. With nearly six decades of MRO expertise, we help you find exactly what yfou need the first time. We supply genuine OEM parts and offer fast shipping for emergency repairs. Order online today with secure payment. You can call us at 224-276-5557 or contact us online for assistance finding the right valve actuator for your project.