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APS PartsSKU: UV-ZK1

ZK1 UL; Valve - Flow Sensitive Unloader Valve UV-ZK1

$134.00

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Overview

The UV-ZK1 is a flow-sensitive unloader valve rated at 3,600 PSI and a flow range of 2.3 to 10.8 GPM. An unloader valve diverts water into bypass when you close the trigger gun, protecting the pump from dead-heading; a flow-sensitive design responds to the change in flow rather than a rise in pressure alone. It also handles variable pressure adjustment, so you can dial pressure down at the valve. Rated to 165°F, it suits hot-water machines. Ports are 3/8" BSP-F inlet, 1/2" BSP-M outlet, and 1/2" BSP-M bypass. A good fit for pressure washers running within its pressure, flow, and thread specs.

What's included

  • Flow-sensitive design responds to change in flow, not just pressure rise
  • Rated to 3,600 PSI maximum
  • Wide 2.3 to 10.8 GPM flow range
  • Doubles as a variable pressure adjustment valve
  • Rated to 165°F for hot-water use
  • 3/8" BSP-F inlet, 1/2" BSP-M outlet and bypass ports
  • Diverts flow to bypass when the trigger gun closes to protect the pump

Specifications

Max PSI
3,600
Min GPM
2.3
Max GPM
10.8
Max Temperature
165°F
Inlet
3/8" BSP-F
Outlet
1/2" BSP-M
Bypass
1/2" BSP-M

Frequently asked questions

A flow-sensitive unloader responds to the change in flow when you release the trigger, rather than reacting only to a rise in pressure. When the trigger gun closes, it diverts water into bypass to protect the pump. This valve can also be used for variable pressure adjustment.

It fits machines operating within its ratings: up to 3,600 PSI, a flow range of 2.3 to 10.8 GPM, and up to 165°F. Confirm your pump's PSI and GPM fall in that range and that the port threads match: 3/8" BSP-F inlet, 1/2" BSP-M outlet and bypass.

Yes. The UV-ZK1 is rated to a maximum temperature of 165°F, so it works on hot-water pressure washers operating within that limit.

The inlet is 3/8" BSP-F, and both the outlet and bypass are 1/2" BSP-M. Match these threads to your plumbing before ordering.

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