Syringes with valves are ideal for sample storage and transportation or to pressurize sample prior to chromatography injection.rSGE offers 3 valve types:r- 'Push-pull': for low volumes (25µl-2,5ml).r- Septum: for higher volumes. Has a kind of key which must be rotated to open or close.r- 'Push-button': for higher volumes. Button is pushed from one side to another for open or close. Useful for syringes with luer lock or removable needle.rSyringes with valves and also valves are detailed below.