Key valve peripheral and instrumentation products include: 1) Electro-Pneumatic Positioners: EP1000 Series. 2) Air Filter Regulators: PRF300 and PRF400 Series.3) Lockup Valves: CL420 and CL523 Series.4) Loop Testers: HC S400 (Current Simulator).

We provide multiple actuation solutions engineered for diverse plant power sources: 1) Pneumatic Diaphragm Actuators: 5200LA, 526LLA, and 5200RA Series. | 2) High-Thrust Electro-Hydraulic Actuators: REXA Electraulic Actuators & Drives. | 3) Pneumatic Cylinder & Electric Actuators: Tailored for heavy-duty quarter-turn and linear operations.

1) Cage Guided Control Valves: 501G Series and 526LL / 550G Series (Multi-hole Cage) | 2) Ball Valves: 6300R / 301K Series (Straight-Through Full Bore) and 6300RA / 331L / 331T (3-Way) | 3) Butterfly Valves: 6400R / 710C Series (Concentric PARA-SEAL Valve).

KOREA KOSO's product portfolio is structured into three primary engineering categories: 1) Valves: Precision industrial control valves and tight shutoff valves. 2) Actuators: Pneumatic diaphragm, cylinder, and electro-hydraulic valve drivers. 3) Accessories: Smart positioners, regulators, and signal instrumentation units.