HPLC valve 7125

stainless steelwhiteblack

Mode! 7125 is a six-port sample injection valve in which the sample is loaded through a built-in needle port in the front ofthe valve. Figure 1 shows the flow diagram of the valve. The cireles represent the ports in the valve stator. The dark and white grooves represent the connecting passages in the rotor seal. The large circle represents the needle port. The sample loop is loaded through the needle port in the LOAD position. Rotation of the knob 60" switches the valve from LOAD to 1NJECT. In 1NJECT the mobile phase flows through the loop. 2.0 SUPPLIED WITH THE VALVE Supplied with the valve in a separate bag are RheFlex* fitting sets for ail ports and the items shown below. A 20 yL sample loop is standard with the valve. • Hex Keys • Needle Port Cleaner • Mounting Screws • Vent Tubes The #22 gauge needle supplied in the valve should be removed from the needle port before using the valve. 3.0 SPECIFICATIONS • Maximum Temperature: 80°C • Maximum Operating Pressure: 48 MPa (482 bar. 7000 psi) • Flow Passage Diameters: 0.6 mm (0.024") and 0.5 mm (0.018") • Wetted Surfaces: stainless Steel, ceramic. and an inert polymer 4.0 IMPORTANT SAFETY NOTICES 4.1 Warning: When using sample loops larger than 100 |iL, shield yourself from mobile phase coming out of the needle port when the valve is tumed from INJECT to LOAD. Example: 1 mL loop ejects 20 pL upon décompression from 19 MPa (200 bar. 2898 psi).