Hydraulic control system for weighing and two-way valve therefor

A two-way valve connected in a hydraulic lifting apparatus between a main operating valve for a hydraulic cylinder and the lift line to the hydraulic cylinder, said two-way valve being connected to a return line of the lift apparatus separate from said main operating valve, said two-way valve comprising a flow-through chamber with a normally open valve therein for permitting hydraulic fluid flow therethrough from said main operating valve;

• a bypass chamber means communicating with said flow through chamber to either side of said normally open valve wherein upon closing said normally open valve fluid flow is directed through said bypass chamber means, and said bypass chamber means having flow control means therein for reducing the flow of hydraulic fluid from said main operating valve;
• a second bypass chamber fluidly communicates with said flow through chamber between said normally open valve and the lift line, the second bypass chamber having therein a normally closed valve and flow control means for controlling flow therethrough when lowering the lifting apparatus, and the second bypass chamber capable of directing flow therethrough outwardly of the two-way valve to the return line to lower lifting apparatus independently of the main operating valve.