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Self-washing injection apparatus [101] for liquid chromatography injection valves utilizes an interior chamber [105] with a penetrable seal [109] at the top end of the chamber and a needle sleeve seal [113] at the bottom end of the interior chamber. A wash port [145] in the body [103] of the apparat

Self-washing injection apparatus [101] for liquid chromatography injection valves utilizes an interior chamber [105] with a penetrable seal [109] at the top end of the chamber and a needle sleeve seal [113] at the bottom end of the interior chamber. A wash port [145] in the body [103] of the apparatus connects one or more sources of wash fluid to the interior chamber between the penetrable seal and the sleeve seal. The apparatus provides a simple and effective means to aspirate or pump wash fluids from one or more wash fluid reservoirs through the apparatus, the injection port of the injection valve, and associated components.

대표청구항 ▼

Self-washing injection apparatus [101] for liquid chromatography injection valves utilizes an interior chamber [105] with a penetrable seal [109] at the top end of the chamber and a needle sleeve seal [113] at the bottom end of the interior chamber. A wash port [145] in the body [103] of the apparat

Self-washing injection apparatus [101] for liquid chromatography injection valves utilizes an interior chamber [105] with a penetrable seal [109] at the top end of the chamber and a needle sleeve seal [113] at the bottom end of the interior chamber. A wash port [145] in the body [103] of the apparatus connects one or more sources of wash fluid to the interior chamber between the penetrable seal and the sleeve seal. The apparatus provides a simple and effective means to aspirate or pump wash fluids from one or more wash fluid reservoirs through the apparatus, the injection port of the injection valve, and associated components. sure compressor times the pressure ratio of the low pressure compressor. 11. A method of operating a recuperated gas turbine including a free turbine, comprising: providing valving between the recuperator and the gas turbine compressor; at high power, setting the valving to operate the gas turbine in a positive pressure mode; and at low power, setting the valving to operate the gas turbine in a subatmospheric pressure mode. 12. The method of operating a recuperated gas turbine including a free turbine of claim 11, and in addition, at mid power, setting the valving to operate the gas turbine in a transatmospheric pressure mode. 13. A method of operating a recuperated two spool gas turbine, comprising: providing valving between the recuperator, the first spool gas turbine compressor, and the second spool gas turbine compressor; setting the valving to operate the gas turbine in a positive pressure mode at high power; and setting the valving to operate the gas turbine in a subatmospheric pressure mode at low power. 14. The method of operating a recuperated two spool gas turbine of claim 13, and in addition, setting the valving to operate the gas turbine in a transatmospheric pressure mode at mid power between high power and low power. 15. The method of operating a recuperated two spool gas turbine of claim 13, and in addition, intercooling the compressed air between the first spool gas turbine compressor and the second spool gas turbine compressor. 16. The method of operating a recuperated two spool gas turbine of claim 13, and in addition, intercooling the recuperated air between the first spool gas turbine compressor and the recuperator. 17. The method of operating a recuperated two spool gas turbine of claim 13, and in addition, intercooling the compressed air between the first spool gas turbine compressor and the second spool gas turbine compressor; and intercooling the recuperated air between the recuperator and the first spool gas turbine compressor. 18. A method of operating a recuperated two spool gas turbine including a free turbine, comprising: providing valving between the recuperator, the first spool gas turbine compressor, and the second spool gas turbine compressor; setting the valving to operate both spools of the two spool gas turbine in a positive pressure mode at high power; setting the valving to operate one spool of the two spool gas turbine in a positive pressure mode and the other spool of the two spool gas turbine in a subatmospheric pressure mode at mid power; and setting the valving to operate both spools of the two spool gas turbine in a subatmospheric pressure mode at low power. 19. The method of operating a recuperated two spool gas turbine including a free turbine of claim 18, and in addition, intercooling the compressed air between the first spool gas turbine compressor and the second spool gas turbine compressor. 20. The method of operating a recuperated two spool gas turbine including a free turbine of claim 18, and in addition, intercooling the recuperated air between the first spool gas turbine compressor and the recuperator. 21. The method of operating a recuperated two spool gas turbine including a free turbine of claim 18, and in addition, intercooling the compressed air between the first spool gas turbine compressor and the second spool gas turbine compressor; and intercooling the recuperated air between the recuperator and the first spool gas turbine compressor. 22. A method of operating a recuperated two and one half spool gas turbine, comprising: providing valving between the recuperator, the first spool gas turbine compressor, and the second spool gas turbine compressor; at high power, setting the valving to operate the gas turbine in a positive pressure mode; and at low power, setting the valving to operate the gas turbine in a subatmospheric pressure mode. 23. The method of operating a recuperated two and one half spool gas turbine of cl