Industry-leading Agilent manual injection valves are designed to ensure trouble-free operation of your HPLC system. Valves feature patented 'Make-Before-Break' architecture that allows switching between LOAD and INJECT positions without interrupting flow, so more samples may be analyzed in less time. Injection valves are available with different position and port injections, and deliver effective operation under different pressures, to ensure you get the right injection valve for your system and application.