180 Degree Pneumatic Rotary Actuator

Purchase Guide

1. Confirm Valve Type & Travel Angle

HPA 180° actuators mount directly onto 3-way (T-port/L-port) and 4-way ball valves to switch flow paths or swap pipe lines in one continuous 180° turn. (If you need other angles or mid-travel stopping, check the full HPA series table below.)

2. Calculate Required Operating Torque

Our 180° actuator fit multi-port valves with 4-seat drag and special 2-way valves. Start with the valve’s max break torque and add at least 30% safety margin. Output torque relies on cylinder size and air pressure (4 to 8 bar), so send us your valve details and air supply to let us size it for you.

3. Check ISO 5211 Direct Mount & Pipe Clearance

Match the valve top flange (ISO 5211 patterns like F05, F07, F10) and the square stem drive for direct bolt-on mounting without extra brackets. Check total 180° pneumatic actuator length before ordering to keep enough clearance from nearby pipes, skid frames, and walls.

Technical Comparison: 180° vs. Standard 90° Actuators

180° actuators differ from standard 90° models in body length, air demand, and drive type. Check the quick comparison below to verify your piping space and air supply before ordering.

HPA Series Stroke & Rotation Options

Looking for standard 90° shutoff, wider rotation, or multi-position control? Explore the other models in our HPA series below:

Stroke Options
HPA 90°	HPA 120°	HPA 135°	HPA 180°(Current Model)	HPA 3-Position
Standard quarter-turn for 2-way ball valves, butterfly valves, and dampers.	For special rotary valves and dampers that require wider opening angles than standard 90°	Designed for custom multi-way diverter valves and specific mixing setups.	Direct 180° turn to switch flow between two opposite ports on multi-way valves.	Dual-stage stroke control for batching, filling, and flow dosing. Standard stops at 0°–45°–90° or 0°–90°–180°, with custom intermediate angles to fit your process.

180 Degree Rotary Pneumatic Actuator FAQs

Q1: Do you offer a spring return 180 actuator (single-acting)?

No. The HPA 180° series comes only as a double acting. Turning a valve 180° needs twice the piston travel of a standard 90° HPA actuator. Springs across this stroke lose force near the end and can stall a multi-port valve. Using air to drive both ways keeps the torque steady across the whole turn.

Q2: Are the mounting sizes the same as a standard 90° rack and pinion actuator?

Yes. The bottom valve pad (ISO 5211) and top shaft (NAMUR) match standard 90° HPA actuators. Your existing valves, brackets, and accessories bolt right on. Note that this rack and pinion 180 degree rotary actuator has a body 30% to 50% longer to fit the longer gear racks.

Q3: Can you match different valve stem shapes for multiport valve actuator packages?

Yes. We supply standard ISO 5211 drive inserts, including double-square, flat-head, and keyway types. For custom OEM valve stems, we make custom star inserts and reduction sleeves for a tight fit without free play.

Q4: Do standard solenoids and limit switch boxes work on a 180 pneumatic valve actuator?

Yes. Standard 5/2-way NAMUR solenoid valves bolt directly to the side air ports. Standard limit switch boxes fit as well. You can adjust the switch cams by hand to send 0° and 180° position signals to your PLC.

Q5: How do we operate the valve if plant air pressure drops?

You can fit a declutchable manual gearbox between the 180° pneumatic rotary actuator and the valve flange. If air supply stops, turn the manual clutch lever to move the valve by handwheel. Visit our [Declutchable Gear Operator] page to pick the right model and flange size.

Q6: How do we reverse the actuator rotation direction on site?

You do not need extra parts or pipe changes. Take off both end caps, pull out the two pistons, flip them 180° horizontally, and put them back in. This switches the drive direction between Clockwise (CW) and Counter-Clockwise (CCW).

Q7: How can we make a 180 degree pneumatic actuator cycle faster (under 1 second)?

A 180° cylinder holds twice the air of a standard 90° HPA actuator, so it moves a bit slower. For fast speeds, use larger air lines, pick a high-flow solenoid valve, and fit Quick Exhaust Valves (QEV) directly on the actuator ports to dump exhaust air fast.

Q8: Does the longer rack stroke cause heavy mechanical shock at the end positions?

No. Two balanced pistons share the stop load evenly against the end bolts. For high-speed lines or large sizes, screw small exhaust speed controllers into the solenoid exhaust ports to soften the end stop.

Q9: Can we buy spare seal kits for routine field maintenance?

Yes. Pre-packed seal repair kits (with all dynamic O-rings, piston guide bands, and wear rings) can ship with your actuator order for plant repairs and spare stock.

Q10: What if our application requires electric automation instead of pneumatic control?

If you do not have air lines on site, an electric rotary actuator 180 degrees is the right choice. Visit our [HUS Series Electric Actuator] page for motor-driven 3-position valve control.

Q11: What is your MOQ and lead time for OEM / private-label orders?

We accept small trial orders with your metal tags, logo markings, or custom boxes. Standard batch orders ship in 15 to 25 days, backed by full OEM support.

HPA Series 180 Degree Pneumatic Rotary Actuator Technical Troubleshooting & Maintenance