The KOFLOC RK1650-SS-CC-1/4-AIR is a premier high-precision variable area flowmeter (Rotameter) featuring an extended long-scale design from the acclaimed RK1650 Series manufactured by KOFLOC (Kojima Instruments Inc., Japan). Designed specifically for rigorous industrial and research testing environments, the RK1650 series delivers exceptional readability, high measurement sensitivity, and unmatched flow stability.

Constructed with premium Stainless Steel (SUS) wetted parts, the unit ensures superior durability and resistance against corrosion and oxidation. The precision-formed Borosilicate Pyrex glass tube offers high pressure resistance and crystal-clear transparency, paired with fine laser-etched scale graduations that remain sharp and legible over extended service life. Equipped with a built-in precision micro needle valve (Type CC) at the bottom inlet, this model allows smooth, ripple-free regulation of compressed air flow, making it an indispensable instrument for cleanroom monitoring, semiconductor purge systems, optical chambers, and automated pneumatic testing cells.

• Manufacturer: KOFLOC (Kojima Instruments Inc.)
• Brand Origin: Japan
• Full Model Designation: RK1650-SS-CC-1/4-AIR
• Product Classification: High-Precision Long Scale Variable Area Flowmeter / Purge Rotameter
• Fluid Service: Clean Compressed Air
• Flow Range: Configurable based on requirements (from low mL/min up to 5L, 10L, 20L, 30L, 50L/min)
• Scale Length: Long scale 150 mm (Extended length provides superior graduation resolution and readability)
• Standard Calibrated Pressure: 0.1 MPa – 0.5 MPa (Depending on system configuration)
• Maximum Operating Pressure: 0.8 MPa (approx. 8 bar / 116 psi)
• Proof Pressure: 1.0 MPa (10 bar)
• Flow Measurement Accuracy: ±2% F.S. (Full Scale)
• Repeatability: ±0.5% F.S.
• Flow Adjustment: Integrated precision micro needle control valve (Type CC)
• Valve Placement: Integrated at bottom inlet (Bottom IN)
• Process Connections: 1/4 inch female threaded connection (Rc 1/4" or NPT 1/4" industrial standard)
• Flow Direction: Vertical bottom-inlet to top-outlet (Bottom IN - Top OUT)
• Body & Block Material: Stainless Steel (SUS304 / SUS316)
• Tapered Tube Material: High-grade Borosilicate Pyrex Glass
• Float Material: Precision-machined SUS316 Stainless Steel / High-grade glass
• Sealing Material: Chemical-resistant FKM (Viton) / NBR O-rings
• Operating Temperature Range: 0°C to 60°C (Fluid and Ambient)
• Mounting Configuration: Panel mount design with integrated rear mounting studs
• Typical Applications: Semiconductor clean purge flow, drying booth air monitoring, optical chamber inert blanket regulation, automated assembly air verification, and R&D pneumatic instrumentation