Modular unloading sequencing switching valve assembly for hydraulic system

摘要

An improved unloading and sequencing control valve for a two pump hydraulic system is adapted to be mounted directly onto the bearing carrier of a two section gear pump or at a remote location and connected to the pumps by plumbing and is capable of operating in a flow sensing mode only, a pressure sensing mode only, or a combination flow sensing and pressure sensing mode. The control valve includes a removable adjustable flow sensing orifice and is adapted for remote pressure sensing and remote pressure adjustment as well as multiple selective preset flow sensing pressure to provide any desired unloading or sequencing pressure within limits of pump capacity.