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The Powergenex SS5 Valve Positioner uses a hybrid HART communication protocol that simultaneously uses a 4–20mA analog signal and digital signal. Its special feature is a fail-freeze function that keeps the valve at the last position in the event of a power or pneumatic air supply failure.

This compact digital valve positioner can be used on both single or double acting actuators without needing further adjustments. It’s also capable of detecting whether the valve is reverse acting or direct acting despite wrong air connections.

This auto-calibrating positioner responds quickly and provides diagnostics for performance failures. It’s available with a NAMUR standard mount and various mounting brackets for rotary valves.

Technical specifications




SS5 (Fail-freeze)

Input signal

4–20mA DC

Air supply pressure

1.4–7 bar, filtered, compressed dry and non-oiled to meet Class 3 of ISO 8573-1

Protection class

IP66, intrinsically safe (IECEx / ATEX / KC Exia IIC T6/T5)

Output pressure range

0–100% of supply air pressure

Performance characteristics

Linear, equal percentage, quick opening, user set (17 points)

Operating temperature

-30°C to +80°C
(-40°C on request)

Material specifications


Aluminum die-cast/powder-painted

How we help you choose the right valves:

1. Tell us what you need

Talk to our experts about your application, which valves and controls you need, and any repair or maintenance concerns.

2. Choose the right solution

We’ll do all the analysis, discuss the options with you, and make a recommendation—the valves we’d choose in your shoes.

3. Get the job done

Get the right valves for the job, fitted out, tested, and ready to install. We’ve got your back with ongoing repairs and maintenance.

Talk to a valve specialist

Got questions? Need advice? Our valve specialists can give you practical advice to help you get on with the job.

Valve automation & repairs

Actuators. Positioners. Controls. Valve repairs. Whatever you need, our valve workshop can handle it.