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
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.
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:
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.
| 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 |
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.
The Spirax Sarco SX80 is a 1/16 DIN panel mount process controller offering universal input for RTD and thermocouple signals, universal output with VMD 3-point, 4-20 mA analog, relay and logic, PID auto-tuning, 3 setpoints and a built-in 18 VDC transmitter power supply.
Spirax Sarco SP7-10, SP7-11 and SP7-12 smart positioners control pneumatic linear or rotary actuators and support 4-20 mA, HART, PROFIBUS PA or Foundation Fieldbus communication routes.
The Spirax Sarco SP500 is an enhanced loop-powered electro-pneumatic smart positioner for linear and rotary pneumatic valves. Building on the SP400 platform, it adds optional HART communication, diagnostic data logging, retransmission capability and a 24V power board, while retaining the same 4-20 mA input, Hall effect non-contact feedback and piezo valve technology.
The Spirax Sarco SP400 is a loop-powered electro-pneumatic valve positioner for linear and 90 degree rotary pneumatic valves. It uses a 4-20 mA input signal, non-contact valve position feedback and automatic air output correction to help the valve reach and hold the demanded position.
| Document | Reference | Language | Download |
|---|---|---|---|
| EP500 Advanced ATEX Electropneumatic Positioner | TI-P343-45-US | English | Download |
EP500 selection usually sits inside a pneumatic valve package decision that also includes the actuator, valve body and instrument air requirements.
Return to positioners, controllers and sensors when you need to compare EP500 with SP400, SP500, SP7, EP6 and other feedback products.
Review pneumatic actuators when the next step is confirming linear or rotary motion, mounting interface and direction of action.
Use control valve pages when the project needs the valve body, actuator, positioner and air preparation package considered together.
