Description
ZK7 Flow Actuated Unloader Valve
The ZK7 series by General Pump is a line of flow actuated unloader valves designed to regulate pressure in high-performance pressure washer systems. Unlike standard pressure actuated unloaders, these valves respond to the water flow, eliminating high-pressure spikes in the lines when the unit is in bypass mode.
Key Specifications and Models
The ZK7 series is divided into 4 models based on the specific flow rate (GPM) of your pump. All models share a maximum pressure rating of 3500 PSI and a maximum temperature of 165°F.
Ports- 3/8″ BSP inlet, 3/8″ BSP outlet, 3/8″ BSP bypass
UN-K7.0 – 2.1 to 3 GPM
UN-K7.1 – 3 to 4.2 GPM
UN-K7.2 – 4.2 to 6.6 GPM
UN-K7.3 – 6.6 to 10 GPM






