for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another

Full Title

Arrangements for supervising or controlling working operations > for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another

Child Classifications

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• F17D 3/05 the different products not being separated (separation of contaminants by distillation B01D3/00)
• F17D 3/08 the different products being separated by "go-devils", e.g. spheres (cleaning devices moved along inside a pipe-lines by fluid pressure B08B9/04; )