The KOFLOC Model 3810-SE-V(1/4-RC)-AIR or N2-d0=0.1-V(1/4-RC) is an ultra-precision mechanical metering needle valve belonging to the renowned Model 3810 Series manufactured by KOFLOC (Kojima Instruments Inc., Japan). It is widely regarded as a benchmark flow regulation valve engineered specifically for critical ultra-micro gas flow applications requiring strict linearity and zero backlash.

Constructed entirely with SUS316 stainless steel wetted parts (Code SE), this valve delivers superior corrosion resistance, high structural purity, and maximum longevity across harsh analytical environments. Its non-rotating needle design paired with fine screw threading prevents galling and wear against the orifice seat, ensuring smooth, drift-free regulation over repeated adjustments. Featuring a nominal orifice diameter of d0 = 0.1 mm, high-performance FKM Viton seals (Code V), and standard Rc 1/4" female threaded ports, this unit provides optimal metering performance for compressed Air and Nitrogen (N2) carrier lines in chromatography, cleanroom test benches, and semiconductor process chambers.

• Manufacturer: KOFLOC (Kojima Instruments Inc.)
• Brand Origin: Japan
• Full Model Designation: 3810-SE-V(1/4-RC)-AIR or N2-d0=0.1-V(1/4-RC)
• Product Classification: Ultra-Precision Micro Metering Needle Valve
• Service Fluids: Clean Compressed Air or Nitrogen Gas (N2)
• Needle Construction: Non-rotating needle mechanism (Prevents seat galling and ensures smooth linear control)
• Nominal Orifice Diameter: d0 = 0.1 mm (Specially designed for ultra-micro flow control)
• Flow Control Range: Smooth, continuous micro-flow regulation from low mL/min ranges with linear flow characteristics
• Maximum Operating Pressure: 1.0 MPa (10 bar / approx. 145 psi)
• Proof Pressure: 1.5 MPa (15 bar)
• Process Connections: Rc 1/4" female thread (1/4-RC industrial standard)
• Body Material: High-grade SUS316 Stainless Steel (Code SE)
• Needle & Seat Material: Precision-ground SUS316 Stainless Steel
• Sealing Material: Chemical-resistant FKM / Viton elastomer (Code V)
• Operating Temperature Range: 0°C to 60°C (Fluid and Ambient)
• Adjustment Mechanism: Multi-turn fine-pitch control knob for smooth micro regulation
• Locking Mechanism: Integrated lock nut to secure needle position against plant vibrations
• Mounting Style: Inline piping or panel mount configuration
• Target Applications: Gas chromatography carrier gas metering, semiconductor purge systems, precision gas mixing benches, optical device purging, and high-purity laboratory research instrumentation