Need to break my pressure washer pressure ( 3000 psi) into different level 500,1200,1800,2200, 2500,2800 psi?

Question

I am sending 3000 psi through pipe and need to break and obtain differnt psi strength at different point because I need to test my device in different psi level. Please help me to do so. Do I need to buy differnt psi checking meter or I can use valves at different check point. Kindly help me giving easy way

Answer 1

Since a pressure washer uses a positive displacement pump you will need to keep a flow of water through the pump.

This is done by installing a recirculating relief valve from the discharge to the inlet side of the pump.

When pressure rises above a preset limit the relief valve opens and returns some of the high pressure water back to the inlet, recirculating.

Most pressure washers come with such a pressure setting device already installed. You either need to adjust it OR it may be damaged and stuck closed.

You may also add a relief valve to the inlet of your device to protect it from over pressure and to allso testing at different pressures. Just let this valve blow off to the ground or a drain...

Answer 2

3000 psi will compress water volume by 1% , the stream from that can cut through stuff so yes it is dangerous. we use a vac trailer to dig holes for water lines were i work and on it is a pressure hose that we have even cut through 2 by 6 plancks with.