Micro Control Valves

Micro - control valves can be used for a wide range of applications in chromatography, as well as analytical science. Generally, micro needle valves are used for fine control of gas or liquid flows. Most valves can be used at elevated temperatures over a wide range of pressures from high vacuum to a few atmospheres.

Two basic configurations exist in the valve product range, an "L" and a "T" configuration.

If the application requires in line, on / off control or metering of a single gas stream, choose an "L" configuration, i.e. BMCV, MCV, MOVP, MOV or SMOV.

If the application requires diversion or splitting from the main stream of gas to another column or detector and so on, choose a "T" configuration, i.e. MOVT, MOVPT or MCVT.

Effect of Viscosity

The flow of a gas through an orifice is affected by its viscosity. Different gases have different viscosities and so the flow through valves will vary according to the gas being used.

Effect of Temperature on Flow

As the temperature of a gas is raised, the collisional frequency of the gas molecules rises and the effective viscosity of the gas increases. While the effect varies from one gas to another, the overall effect is that increasing the temperature decreases the anticipated flow through the valve.

MCV 1
MCV 2
MCV 3
MCV 4
MCV 5

High Performance ON/OFF Valves

MOVT valves provide a quick and positive on/off response under high vacuum or pressure. This is suitable for solvent dumping. 1/16" OD flow lines or fused silica lines can be used.


Part No. Configuration / Material Description
1236071 MOVT - T Dual Outlet, Stainless Steel 50mm, 1/16" 300°C

Pneumatic Control ON/OFF Valves

The MOVP and MOVPT valves have a similar design to the MOVT except with these valves, the on/off function is actuated pneumatically. The pneumatic head assembly, which can be actuated remotely with a toggle switch or solenoid valve, is operated from a 50-55 psi air supply.


Part No. Configuration / Material Description
1236091 MOVP - L Single Outlet, Stainless Steel 50mm, 1/16" 300°C
1236103 MOVPT - T Dual Outlet, Stainless Steel 50mm, 1/16" 300°C
1236104 MOVPT(L) - T Dual Outlet, Stainless Steel 100mm, 1/16" 300°C

High Performance Flow Control Valves

High performance flow control valves MCV and MCVT valves have a fine tapered needle to give precision control through a wide flow range, to complete shut off. Ten turns provides control from fully open to fully closed for complete shut off.


Part No. Configuration / Material Description
1236012 MCV - L Single Outlet, Stainless Steel 50mm, 1/16" 300°C
1236020 MCV - L Single Outlet, Stainless Steel 100mm, 1/16" 300°C
1236032 MCVT - T Dual Outlet, Stainless Steel 50mm, 1/16" 300°C

Low Cost Stainless Steel ON/OFF Valves

The SMOV compact stainless steel on/off valve is ideal for use as an isolation/shut off valve. Suitable for solvent dumping. 1/16" OD flow lines or fused silica lines can be used. Can be used at temperatures from ambient to 100°C, ideal isolation/shut off valve.


Part No. Configuration / Material Description
1236283 SMOV - Single Outlet, Stainless Steel 1/16" 100°C

Low Cost Stainless Steel Control Valves

The BMCV, an inexpensive mini - valve, is ideal for on-line micro control for elevated pressures to 6 atmospheres (90 psi), and temperatures from ambient to 100°C. This valve is ideally used for septum purge and non - precision flow control. The valve accepts 1/16" OD flow lines.


Part No. Configuration / Material Description
1236281 BMCV - A - Single Outlet, Brass 1/16" 100°C
1236282 BMCV - 1 - Single Outlet, Brass 1/16" 100°C