Abstract: This paper introduces the characteristics of multi-way plunger valve and its configuration design from the perspective of piping design combined with the design experience and examples of slurry pipeline in a residue hydrocracking unit. There is no fixed configuration for multi-way plunger valve. The process flow requirements, equipment layout, installation and operation space and piping flexibility should be considered comprehensively in the piping design, the configuration of main plunger should be designed based on piping system on the premise of meeting the valve manufacturing requirements, and the design of valve support, flushing plunger valve and draining plunger valve should be perfected. Piping design and the configuration design of multi-way plunger valve influence each other and should be carried out synchronously.

Key words: residue hydrocracking, multic-way plunger valve, piping design