Micro-Splitter Valves

Micro-Splitter Valves


  • For interfacing LC-MS systems
  • Adjustable split stream flow rates
  • Medium and high pressure versions


The Upchurch ScientificR line of Micro-Splitter Valves is designed to accurately split and control a low-flow stream off a single incoming supply.


Choose between 1/4-28 flat-bottom and 10-32 coned threaded versions. A valve is also available to accommodate applications involving capillary tubing with a 6-32 coned threaded fitting for MicroTightR tubing sleeves.


The High Pressure Micro-Splitter Valves are designed to operate successfully up to 4,000 psi (276 bar) and the medium pressure Micro-Splitter valves are pressure rated to 800 psi (55 bar).


Graduated Valves offer many of the benefits and features of Micro-Splitter Valves, plus the ability to adjust and set the split flow to repeatable settings. This allows documentation of settings and the resulting flow rates for easier method development. The graduations also make it easier to employ the valve in a system used to run multiple analyses that require different split flow rates. Choose from regular High Pressure and Capillary versions.


Application NOTE:

  • With an incoming flow rate of 1mL/min using room temperature water and equal pressures on both outlet lines, the minimum split flow rate is 2 μL/min for the medium pressure micro-splitter valves and 4.8 μL/min for the high pressure micro-splitter valves.
  • All Micro-Splitter Valves have been tested at flow rates to 100 mL/min, with a maximum resulting pressure drop of only 45 psi (3.1 bar) when the valve is fully opened.



Serial Number Description
M-405S Micro-Splitter Valve 6-32
M-472 Graduated Micro-Splitter 10-32 Coned, for 1/16" OD
P-450 Micro-Splitter Valve Assembly 1/4-28 Flat-Bottom
P-451 Micro-Splitter Valve Assembly 10-32 Flat-Bottom
P-452 Micro-Split Valve Assembly 10-32/6-32 Flat-Bottom
P-460S High Pressure Micro-Splitter Valve 10-32 Flat-Bottom PEEK/Stainless Steel
P-460T High Pressure Micro-Splitter Valve 10-32 Flat-Bottom PEEK/Titanium
P-470 Graduated Micro-Splitter Valve 10-32 Coned