Waterjet Group

JWaterhouse · Member

Pump psi

Jetman · Newbie

All pumps have a safe rated maximum operating pressure from the manufacturer. Flow International for example has a Hyperjet pump that operates at 87k while cutting.

Pressure alone is not the only item you must take into account, you must also consider water volume since a pump can only supply rated pressure at a max given volume of water flow.

For example 87k of dead headed pressure (NO water flow) would not do you any good because no work can be performed without water flow.

On the other hand, if the pump cannot keep up with the volume of water demanded of it once the jet is enabled, the water pressure will plummet because any pump regardless of manufacture will reach a point where it can no longer maintain the pressure it was designed to produce once water volume goes beyond design parameter limitations.

Bottom line, your waterjet pump should provide you many years of safe operating pressure as long as you remain with the pressures and volumes it was designed to produce.

Jetman · Newbie

All pumps have a safe rated maximum operating pressure from the manufacturer. Flow International for example has a Hyperjet pump that operates at 87k while cutting.

Pressure alone is not the only item you must take into account, you must also consider water volume since a pump can only supply rated pressure at a max given volume of water flow.

For example 87k of dead headed pressure (NO water flow) would not do you any good because no work can be performed without water flow.

On the other hand, if the pump cannot keep up with the volume of water demanded of it once the jet is enabled, the water pressure will plummet because any pump regardless of manufacture will reach a point where it can no longer maintain the pressure it was designed to produce once water volume goes beyond design parameter limitations.

Bottom line, your waterjet pump should provide you many years of safe operating pressure as long as you remain with the pressures and volumes it was designed to produce.

Topend1 · Member

J-
Our newest sysem from Flow is rated at 94,000 PSI but operates at 87,000 psi. when the pump is idle or deadhead as jetman states it is at 94,000 then runs at the lower psi.

Bud Weiser · Newbie

We just bought a TechniJet with a 60,000 psi pump . It normally runs at 55,000 but it needs 45psi constant water pressure to hold that . I think they are trying to overcome volume with pressure though to achieve that .

Anyone experienced with Techni? We have an OMAX which I think is a much more user friendly machine , but the pump is high maintenance.

Jtorva · Newbie

All depends on the brand of pump that you are using. We run three Omax machines all with Omax's Enduromax pumps. Two of the machines have a 50 hp motor while the other machine has a 40 hp motor. Here at Karice Enterprises I run all three pumps at 55,000 psi but have a substancial difference in cutting speed between the 40hp and 50hp pumps. The myth is that high psi will cut faster but that isn't entirely true. With the 50hp pump I am able to use a 0.016" orifice at the nozzle with a 0.042" mixing tube and an abrasive flow of 1 lbs per minute. Now on the 40 hp pump I use a 0.014" orifice with a .030" mixing tube and an abrasive flow rate of 0.75 lbs per minute. If you were to run the same part on the two machines the 50hp machine will cut up to 30% faster in some cases. Now the new Enduro max pump is capable of running at 60,000 psi but as many people know if you run a high pressure pump at its max you will tend to have less seal life. If you back the pressure off a bit (in my case I run at about 92%) you can prolong the life of your pump and other components.

Jordan

http://www.karice.net/

Jtorva · Newbie

All depends on the brand of pump that you are using. We run three Omax machines all with Omax's Enduromax pumps. Two of the machines have a 50 hp motor while the other machine has a 40 hp motor. Here at Karice Enterprises I run all three pumps at 55,000 psi but have a substancial difference in cutting speed between the 40hp and 50hp pumps. The myth is that high psi will cut faster but that isn't entirely true. With the 50hp pump I am able to use a 0.016" orifice at the nozzle with a 0.042" mixing tube and an abrasive flow of 1 lbs per minute. Now on the 40 hp pump I use a 0.014" orifice with a .030" mixing tube and an abrasive flow rate of 0.75 lbs per minute. If you were to run the same part on the two machines the 50hp machine will cut up to 30% faster in some cases. Now the new Enduro max pump is capable of running at 60,000 psi but as many people know if you run a high pressure pump at its max you will tend to have less seal life. If you back the pressure off a bit (in my case I run at about 92%) you can prolong the life of your pump and other components.

Jordan

http://www.karice.net/

yh75847584 · Member

the regular is 55,000psi, 60,000psi, some pumps can reach 72,000psi, 90,000psi, and 120,000psi

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