Spirax Sarco EP500 Electro-pneumatic Positioner
Control systems > Positioners, controllers and sensors
Spirax Sarco EP500 Electro-pneumatic Positioner
The Spirax Sarco EP500 is a standard electro-pneumatic positioner for linear and rotary pneumatic control valves. It uses a 4-20 mA input signal with split-range capability, integral pressure gauges, central or offset mounting and a quick-fit electrical connection cap to deliver reliable position feedback correction without the communication and diagnostic features of the SP400 and SP500 smart positioners.
Quick facts
Where EP500 sits in the control range
EP500 belongs in the Spirax Sarco positioners, controllers and sensors range. It is a standard, non-smart electro-pneumatic positioner designed for pneumatic control valve applications that need reliable position correction and split-range capability without digital communication, diagnostic logging or automatic commissioning.
If the application requires HART communication, diagnostic data logging or auto commissioning, consider the SP400 or the SP500 smart positioners instead.
Product position: EP500 versus SP400 and SP500
The EP500 is the straightforward choice for standard positioning duties where 4-20 mA input, split-range operation and integral pressure monitoring are the main requirements. It does not include:
- HART communication for remote configuration and asset management integration.
- Diagnostic data logging for valve travel and operating hours.
- Automatic commissioning routines with LCD menu setup.
- Hall effect non-contact feedback (the EP500 uses a conventional feedback mechanism).
The SP400 adds non-contact feedback, LCD menu setup and automatic commissioning. The SP500 extends that further with optional HART communication, diagnostic data logging and retransmission capability.
Features and specifications
| Parameter | Value |
|---|---|
| Input signal | 4-20 mA |
| Split-range capability | Yes |
| Actuator stroke range | 10 to 100 mm (linear and rotary) |
| Enclosure rating | IP65 |
| Pressure gauges | Integral supply and output gauges |
| Mounting options | Central or offset |
| Access | Ergonomic access hatch with hinged cover |
| Electrical connection | Quick-fit connection cap |
| Actions | Direct and reverse |
| Valve compatibility | 2-way and 3-way valves |
Installation and selection tips
Before specifying the Spirax Sarco EP500, confirm the actuator type and series, the required stroke or rotation range, supply pressure availability and whether split-range operation is needed. Also confirm the enclosure environment, air connection thread and whether the positioner is being ordered alone or as part of a complete control valve package.
The EP500 supports central and offset mounting configurations. The ergonomic access hatch and hinged cover allow straightforward wiring and maintenance access. The quick-fit electrical connection cap simplifies field installation.
Related routes
- Return to positioners, controllers and sensors to compare EP500 with SP400, SP500, SP7, EP6 and adjacent feedback products.
- Review pneumatic actuators when the immediate decision is the actuator platform.
- Review control valves when the valve body, actuator and positioner need to be selected together.
Installation and Maintenance
| Document | Reference | Language | Download |
|---|---|---|---|
| EP500 Standard Electropneumatic Positioner | IM-P343-44 | English | Download |
Continue your EP500 selection route
EP500 selection usually sits inside a pneumatic valve package decision that also includes the actuator, valve body and instrument air requirements.
Compare the positioner range
Return to positioners, controllers and sensors when you need to compare EP500 with SP400, SP500, SP7, EP6 and other feedback products.
Match the pneumatic actuator
Review pneumatic actuators when the next step is confirming linear or rotary motion, mounting interface and direction of action.
Build the complete valve package
Use control valve pages when the project needs the valve body, actuator, positioner and air preparation package considered together.