The KOFLOC RK1710-Air/N2-50L/min is a high-precision variable area flowmeter (Rotameter) belonging to the acclaimed RK1710 Series manufactured by KOFLOC (Kojima Instruments Inc., Japan). This model is engineered to provide reliable monitoring and smooth regulation for Compressed Air and Nitrogen (N2) streams across medium-to-high flow ranges (up to 50 L/min), combining compact dimensions with outstanding flow repeatability.

Featuring a robust, precision-machined metal body, the unit delivers high structural integrity suitable for rigorous industrial and laboratory environments. The transparent Borosilicate Pyrex glass metering tube offers high resistance to pressure and thermal stress, paired with finely laser-etched scale graduations that remain sharp and legible over extended operating lifetimes. Additionally, the unit incorporates an integrated micro precision needle valve at the inlet, enabling operators to achieve smooth, ripple-free flow rate adjustments. It serves as an optimal solution for cleanroom supply systems, optical purge tunnels, inert gas packaging, semiconductor manufacturing tools, and automated pneumatic testing cells.

• Manufacturer: KOFLOC (Kojima Instruments Inc.)
• Brand Origin: Japan
• Full Model Designation: RK1710-Air/N2-50L/min
• Product Classification: Precision Variable Area Flowmeter / Purge Rotameter
• Applicable Fluids: Clean Compressed Air or Nitrogen Gas (N2)
• Full Scale Flow Range: 5 – 50 L/min (Standard Air / N2 calibration)
• Standard Operating Pressure: 0.1 MPa – 0.5 MPa (Depending on calibrated setup)
• Maximum Operating Pressure: 0.8 MPa (approx. 8 bar / 116 psi)
• Proof Pressure: 1.0 MPa (10 bar)
• Measurement Accuracy: ±2% F.S. (Full Scale)
• Repeatability: ±0.5% F.S.
• Flow Adjustment Mechanism: Integrated precision micro needle control valve
• Valve Configuration: Built-in bottom control valve (Inlet side regulation)
• 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) or high-grade chrome-plated brass
• Tapered Metering Tube: High-grade Borosilicate Pyrex Glass
• Float Material: Precision-machined SUS316 Stainless Steel
• Sealing Material: High-performance FKM (Viton) / NBR chemical-resistant O-rings
• Operating Temperature Range: 0°C to 60°C (Fluid & Ambient)
• Mounting Configuration: Panel mount design with integrated rear mounting studs
• Typical Applications: Component drying air blowers, cleanroom air shower booths, heat-treatment inert atmosphere control, optical shielding gas purge, laboratory sparging systems, and factory pneumatic automation lines