MODEL 2412 SERIES
Precision Needle Valve w/Non-rotary Needle MODEL 2412 SERIES. This needle valve has been designed to control minute gas and liquid flows with precision and ease. Design allows the rotation of the regulating screw to transform into linear motion of the needle without subjecting the needle to gaps and/or vibrations produced by the screw, so smooth, stable flows can be ensured.
■Fluid：
Gas N₂,Air,H₂,He,Ar,O₂,CO₂ etc.
Liquid H₂O
■Flow range：
Gas 5mL/min～100L/min(Air at 20℃ DP:0.1MPa)
Liquid 5mL/min～2L/min(H₂O at 20℃ DP*:0.1MPa )
*DP means Operating differential pressure condition.
Feature:
Capable of controlling ultra-minute flows
Very accurate, stable control of ultra-minute flows up to 1 ML/MIN possible
□ Wide variations of needle type
15 types of needles are available for your choice of the type that best suits your needs.
□ Needle of non-rotary structure
Because this valve is constructed so that the rotation of the regulating screw is transformed into linear motion of the needle, the valve has a longer life in addition to superior control performance.
□ Superior temperature characteristic (15-35°C)
The valve counts on an outstanding temperature characteristic (flow fluctuations remain within an insignificant range of 0.3%/°C to ambient temperature variations) thanks to the temperature compensation system incorporated in the valve’s needle and orifice. This temperature compensation system is a utility model of KOFLOC
registered at the United States Patent and Trademark Office. (Optional specification for needles #SS1 to #3B-BS) This temperature compensation system is applicable to gases only, and not to liquids, because the viscosity of a liquid may fluctuate depending upon the temperature conditions.
Application:
For accurate control of minute flows of gases and liquids.
Releted Products
Principle of Flow Control Valve
A needle valve is the typical flow control valve that controls the flow rate based on the change of resistance of the flow channel using an acicular or rod-shaped needle to adjust the opening of the flow channel that functions as a small orifice. KOFLOC offers simple-type, precision-type and various other needle valves, and also manufactures flow controllers having a combination of a needle valve and diaphragm as well as proportional solenoid valves that electrically control the flow rate.
MODEL 2412M SERIES
Multidial Type Precision Needle Valve (Ideal for restriction of flows by dial control operation) MODEL 2412M SERIES. This is an enhanced model of the KOFLOC Precision Needle Valve Model 2412 (see page 116), which now incorporates a multidial that allows the user to set desired flow rates by dial operations. This valve makes the most of the rotation-to-flow linearity and repeatability performance of the 2412 needle.
■Fluid：
Gas N₂,Air,H₂,He,Ar,O₂,CO₂ etc.
Liquid H₂O
■Flow range：
Gas 5mL/min～100L/min(Air at 20℃ DP:0.1MPa)
Liquid 5mL/min～2L/min(H₂O at 20℃ DP:0.1MPa)
*DP means Operating differential pressure condition.
MODEL 2203 SERIES
Variable Secondary Pressure Flow Controller MODEL 2203 SERIES.A flow controller is a differential pressure regulator designed to control minute gas flows with precision and keep a certain constant flow rate. Model 2203 Variable Secondary Pressure Flow Controller is a control valve that keeps mass flows at a constant rate under a given constant level of supply pressure even when the load pressure on the secondary side (outlet side) fluctuates, and its construction is designed so that the performance of its precision control over flows to the set flow rate is maintained by the incorporated precision needle valve without being affected by such fluctuations.
■Fluid：N₂,Air,H₂,He,Ar,O₂,CO₂ etc.
■Frow range：10mL/min～20L/min(Air at 20℃)
MODEL 2204 SERIES
Variable Primary Pressure Flow Controller MODEL 2204 SERIES.Model 2204 Variable Primary Pressure Flow Controller is a control valve that always keeps flows at a constant rate under a given constant level of secondary pressure (outlet pressure) even when the primary pressure (inlet pressure) fluctuates. The built-in precision needle valve accurately controls flows to the set flow rate, including ultra-minute flows.
■Fluid： Gas： N₂,Air,H₂,He,Ar,O₂,CO₂ etc.
■Flow range： Gas 10mL/min～10L/min(Air at 20℃)
MODEL 3000 SERIES
Small Proportional Solenoid Valve MODEL 3000 SERIES.The Model 3000 Series maintains flow control characteristics with hysteresis of 15% or less (full-scale current). This ultra-compact proportional solenoid valve is perfect for automatic gas flow control of gas chromatographs and various other analyzers. With its high resolution, the Model 3000 is also suitable for precision pressure control.
■Fluid：Gas：N₂,Air,H₂,He,Ar,O₂,CO₂ etc.