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Control valves back-flush

A gas chromatograph is used for the primary separation of the components in gas oil. An automatic unit feeds the chromatograph with samples and a back-flushing unit has heen added in order to remove heavy hydrocarbons, which might otherwise choke the column. TTie carrier gas (nitrogen) is controlled by three electropneumatic valves, as shown in Fig. 4.4. In the normal mode with valve A open and valves B and C closed, carrier gas flows through columns 1 and 2 to the detector. [Pg.111]

The HPLC equipment consisted of a Milton Roy CM4000 ternary gradient pump, a lOOm Reodync sample injection valve, and a Reodyne valve for solvent back flushing, which was controlled by a Spectra Physics 4270 integrator to carry out the data acquisition. [Pg.260]

When pumping dirty water through a small ported control valve (1 inch or less), the valve may easily plug. I can back-flush the valve to blow the dirt out (refer to Fig. 38.5) ... [Pg.515]

See other pages where Control valves back-flush is mentioned: [Pg.78]    [Pg.402]    [Pg.270]    [Pg.313]    [Pg.111]    [Pg.112]    [Pg.402]    [Pg.211]    [Pg.163]    [Pg.254]    [Pg.237]    [Pg.630]    [Pg.181]    [Pg.478]    [Pg.4485]    [Pg.509]    [Pg.266]    [Pg.325]    [Pg.173]    [Pg.637]    [Pg.676]    [Pg.201]    [Pg.646]    [Pg.416]    [Pg.488]    [Pg.132]    [Pg.154]    [Pg.72]    [Pg.106]   
See also in sourсe #XX -- [ Pg.515 ]



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