The KOFLOC RK1250-SS-CC-1/4-AIR-50L/MIN is a premier high-precision variable area flowmeter (Rotameter) featuring an extended scale length from the renowned RK1250 Series manufactured by KOFLOC (Kojima Instruments Inc., Japan). Designed with an elongated metering tube compared to standard purge meters, the RK1250 series provides superior reading resolution and fine adjustment capability for compressed air flow rates up to 50 L/min.

Constructed with premium Stainless Steel (SUS304/SUS316) wetted parts, this instrument demonstrates remarkable resistance against corrosion, wear, and mechanical fatigue across demanding plant conditions. The heavy-duty Borosilicate Pyrex glass tube offers high pressure tolerance, paired with precision laser-etched scale graduations that ensure long-lasting legibility. With its integrated precision needle valve and factory calibration for compressed air at 0.1 MPa inlet pressure and 0 MPa outlet (atmospheric exhaust), this rotameter represents an optimal flow control choice for cleanroom benches, semiconductor purge lines, analytical instrumentation, packaging machines, and automated pneumatic production cells.

• Manufacturer: KOFLOC (Kojima Instruments Inc.)
• Brand Origin: Japan
• Full Model Designation: RK1250-SS-CC-1/4-AIR-50L/MIN-(0.1MPa-0MPa)
• Product Classification: High-Precision Long Scale Variable Area Flowmeter / Rotameter
• Fluid Service: Clean Compressed Air
• Full Scale Flow Range: 5 – 50 L/min (Standard Air calibration)
• Calibrated Operating Conditions: Inlet Pressure 0.1 MPa, Outlet Pressure 0 MPa (Atmospheric)
• 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.
• Scale Length: Long scale 150 mm (High readability and fine flow division)
• Flow Adjustment Valve: Integrated micro precision needle control valve (Type CC)
• 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")
• 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
• O-Ring / Sealing Material: Chemical-resistant FKM (Viton) / NBR
• Operating Temperature Range: 0°C to 60°C (Fluid & Ambient)
• Mounting Configuration: Panel mount design with integrated rear mounting studs
• Industrial Applications: Component drying purge monitoring, cleanroom air shower booths, heating chamber blanketing, laboratory sparging systems, and automated industrial test benches