General pump ZK7 flow sensitive unloader valve.

• All stainless and brass internal parts.
• No external moving parts or springs.
• Unique balance nozzle principle: Eliminates high pressure in all lines while unit is in bypass mode.
• Eliminates pressure peaks normally generated by conventionally designed unloaders.
• Unique unbalanced piston design permits precise pressure adjustment.
• Mounts in discharge line; flow-through design.
• Convenient bypass location.
• Dual gauge ports.
• MAX. 3500 PSI