Valves & Actuation

Produced in two styles: Globe pattern (straight 180°) and Angle pattern (90°). NSF standard 14 & 61 compliant, FDA, USDA and USP standards met or exceeded. Fine metering control, excellent linearity of flow. No elastomer (O-rings) metals or lubricants. Working pressures to 250 psi @ 70°F. 

Marquest Scientific’s complete line of Throttle Master™ Needle Valves provide precise control with fine adjustment of corrosive and high purity fluids. The developed metering chamber provides for the most reliable stabilization and linearity of flow. Produced in two styles: Globe pattern (straight 180°) and Angle pattern (90°).  Needle finish, SPI/SPE No. 1. Bubble tight, low torque shutoff, long term performance. NSF standard 14 & 61 compliant, FDA, USDA and USP standards met or exceeded. Needle stem is PTFE sealed for excellent chemical resistance

This versatile, quarter-turn shut-off valve is ideally suited for a variety of laboratory, system monitoring and OEM applications. Available in IPS sizes 1/4” and 3/8” with choice of socket or threaded end connectors. Optional 1/4” valve & adapter kit provides multiple combinations of tubing and male pipe thread connections. Chemical and corrosion-resistant PVC or CPVC valves will never rust, scale or pit, providing exceptional corrosion resistance. Heat resistant CPVC allows higher temperature applications. All valves are assembled with a water soluble, silicone-free lubricant, for critical applications. Valves with socket end are available on request. Full 150 psi Maximum Internal Pressure at 73°F for the most demanding applications.

This versatile, quarter-turn shut-off valve is ideally suited for a variety of laboratory, system monitoring and OEM applications. Available in IPS sizes 1/4” and 3/8” with choice of socket or threaded end connectors. Optional 1/4” valve & adapter kit provides multiple combinations of tubing and male pipe thread connections. Chemical and corrosion-resistant PVC or CPVC valves will never rust, scale or pit, providing exceptional corrosion resistance. Heat resistant CPVC allows higher temperature applications. All valves are assembled with a water soluble, silicone-free lubricant, for critical applications. Valves with socket end are available on request. Full 150 psi Maximum Internal Pressure at 73°F for the most demanding applications.

This versatile, quarter-turn shut-off valve is ideally suited for a variety of laboratory, system monitoring and OEM applications. Available in IPS sizes 1/4” and 3/8” with choice of socket or threaded end connectors. Optional 1/4” valve & adapter kit provides multiple combinations of tubing and male pipe thread connections. Chemical and corrosion-resistant PVC or CPVC valves will never rust, scale or pit, providing exceptional corrosion resistance. All valves are assembled with a water soluble, silicone-free lubricant, for critical applications. Valves with socket end are available on request. Full 150 psi Maximum Internal Pressure at 73°F for the most demanding applications.