Controlair Type Transducer
Marsh Bellofram Type Transducer
Fairchild Type Transducer
Flowserve Type TransducerEPC Type Transducer
The EPC Type is EAA's own design rather than a pattern instrument. The EPC1000 is a direct moving electropneumatic converting unit with a pneumatic power amplifying relay, built to push enough air to move a large-bore control valve quickly.
What Goes Wrong
A large pneumatic actuator strokes slowly when it is fed from an ordinary transducer output. Increasing the actuator size does not help; what the loop needs is more pneumatic power behind the signal, without buying an electric valve positioner for every valve on the plant.
How This Range Solves It
The EPC1000 carries a pneumatic power amplifying relay that gives the output signal a higher power, which increases the acting speed of the actuator it drives. It can also be used in conjunction with a pneumatic valve positioner to realise the function of an electric valve positioner, which turns positioners the plant already owns into electrically controlled ones.
Why Buyers Choose This Pattern
Power amplifying relay
Higher output power to the actuator, and therefore faster actuator movement.
Doubles as an E/P positioner
Paired with a pneumatic positioner it realises the function of an electric valve positioner.
Action changed on site
Direct and reverse action are both catalogued, and the mode of action can be changed directly in the field.
Temperature compensation and wide supply range
A thermistor in the internal circuit compensates automatically, and a wide range of air supply suits various occasions.
Who Orders From This Range
- Large-bore control valves that stroke too slowly
- Plants that already own pneumatic positioners
- Output loops where pneumatic power matters more than closed-loop precision
- Areas requiring flameproof or intrinsically safe protection grades
Where It Is Applied
Questions About The EPC Type Transducer Range
Why choose the EPC1000 over a standard transducer
Because of the pneumatic power amplifying relay. It gives the output a higher power, which is what increases the acting speed of a large pneumatic actuator.
How is the model code built
EPC1, the input signal digit, the output pressure digit, a zero, then the accessory code and the protection grade. EPC1110-AS-OG/I is a 4-20 mA DC input, 20-100 kPa output unit with united filter regulator, output gauge and intrinsic safety.
Does it have feedback
No. It is a direct-acting non-feedback instrument, which is why it reaches high output power and why its precision is described as medium.
Which protection grades are available
G for general, Ex for flameproof and I for intrinsic safety.
Get A Part Number For Your EPC Loop
Send the nameplate data and the actuator spring range and the matching configuration comes back with a price and a lead time.