There are hundreds of options at this time. What is the prime mover for this pump - air, electricity, diesel, other?

Electric, 400v, 60Hz, actually my problem was finding this pump of the given data with the FM approval.

A Google search for "Jockey pump" just returned 1.37e7 hits.

I may be showing my ignorance, but what are FM Approval and UL Listing? What part of the world are you in?

FM = Factory Mutual

UL = Underwriters Laboratories. refer to this link:http://answers.yahoo.com/question/index?qid=20091130005028AAih4K1

Obviously these are us standards, but currently I am working on a project for Saudi Arabia

ILME.....

Your jockey pump question seems to request a pump that would be far from the norm.

I sense a waste of time due to a typo or other mix-up....

Jockey pumps, i.e. small used to maintain pressure in a fire protection system, tend to be of smaller capacity and higher pressure.

50 gpm seems to be too much flow and 120 psi seems to be too little head.

You are not able to find such a FM/UL approved pump because you are so far out of a "normal" range for jockey pumps.

My opinion only...

I agree with you, but it is used for a 150000m2 project with 2 floor buildings, and the flow and head are based on the Hydraulic calculations. Even though the pressure maintenance pump does not need to be FM/UL but the contract's specs. requires it.

Here's one http://completewatersystems.com/wp-content/uploads/2011/04/A-8707.pdf from A-C Firepump that may work. It's listed as a fire pump, so it should be FM Approved. If Saudi Arabia is 50 Hz, it may be a little short on head unless you can use a VFD.

Oops, I see that in an earlier post you stated 60 Hz, so the A-C should be OK. Also, Grundfos now includes Peerless, who is known for fire pumps, so they can probably also supply your needs.

We have Grundfos where I work, the one installed has been in there since 1996. Don't know why it would have to be FM/UL approved unless that's an insurance company requirement. If it is, ask them for a source?

We use a Grundfos in line in our desal plant as a jockey pump and a Grundfos end suction as a jockey in our fire system. I would suggest going to their web and checking or you can also check Franklin Pumps.