KOSO Positioner EPA804-L10 Nihon KOSO Co., Ltd VIỆT NAM

KOSO – Japanese Control Valve & Instrumentation Technology

Nihon KOSO Co., Ltd. is a Japanese manufacturer specializing in automatic control valves, actuators, instrumentation and valve accessories. Founded in 1965, KOSO has developed extensive expertise in process control and industrial automation, providing solutions for demanding applications across power generation, chemical, petrochemical, steel, oil & gas and other process industries.

The KOSO EPA804-L10 belongs to the EP800 Electro-Pneumatic Positioner family. It receives a 4–20 mA DC control signal, converts the signal into pneumatic output pressure and uses valve-position feedback to accurately position a pneumatic control valve. KOSO documentation confirms that EP800 positioners can be used with both single- and double-acting pneumatic actuators.

KOSO EPA804-L10 – Application & Key Technology

The EPA804 series is particularly suitable for rotary-motion pneumatic actuators, while the broader EP800 family covers linear-motion, rotary-motion and long-stroke valve applications. This makes the positioner suitable for control valves used to regulate flow, pressure, temperature and process level.

Typical applications include power plants, steel mills, chemical and petrochemical plants, oil & gas facilities, water treatment, steam systems and other severe industrial process-control environments.

Main Technical Features

These specifications are based on KOSO's EP800 documentation; exact performance depends on actuator, valve and selected configuration.

KOSO Positioner Series Comparison

The EP800 series supports weatherproof, explosion-proof and intrinsically safe configurations, making it suitable for applications where operational safety and environmental resistance are critical. KOSO also offers intelligent KGP positioners for applications requiring more advanced digital functionality.

Why Choose KOSO EPA804-L10?

The combination of mechanical valve-position feedback, stable pneumatic control, low air consumption and robust enclosure options provides reliable valve positioning in demanding process environments. Its split-range capability also allows greater flexibility when configuring multiple control valves within a process loop.

LTĐ – Authorized KOSO Distributor in Vietnam

LTĐ is an authorized KOSO distributor in Vietnam. We provide professional support for product selection, system design, installation, commissioning, configuration, calibration, warranty and fast repair services.

From KOSO EPA804-L10 Positioner to complete KOSO control valve and actuator systems, LTĐ supports customers in selecting the correct configuration according to valve type, actuator, process conditions and required control accuracy.

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