It is not as simple as that, the power supply is a replacement for a compact PSU that fits into a HP Pavillion computer, the replacement PSU is more widely available and generally cheaper in America, but would need to know that it would be okay to use on the UK power system.
Reading between the lines of your question - I think you're asking whether the PSU transformer bought here will work OK on a US PC. The answer would have to be yes in that a US PSU would convert 110 voltage to the correct current required by the PC, motherboard etc. A UK PC, motherboard etc would require the same current/amperage whatever - regardless of whether it was converted from a 110 source or a 240 source.
Several years ago I had to replace a failed PSU in a PC I bought in the US with a new PSU in the UK. As long as the PSU is the correct one for the PC model it should work fine.
Check the spec of the PSU it will tell you what it can handle. Be aware of the fuse ratings, these normally have to be changed to suit the voltage it's being run on, in other words if it's run on 110 Volts the fuse rating will be twice the rating that is required on 240 Volts. The power is constent, therefore if the voltage changes the current has to change to maintain the same power.
It is actually a Delta power supply unit DPS-160GB, a replacement power supply over here would cost about £80, whereas a replacement over in America would cost $39.95 plus shipping. I know they have a switch on the PSU to switch it between 115 and 230, this is what blew it in the first place as my brother switched it to 115v.
These power supplies are also difficult to locate over here even though the it is an UK machine.