I have been asked to wire a 200 amp single phase panel which will be a sub panel that is 150 feet from the power source what size feeder do i need to run

This is a great mixer and comes in single phase are well as 3 phase. If you have three wires, it is live, neutral and ground and is single phase. It it has 4 wires, it has a ground, two live and a neutral it is 3 phase 220 volts.

MOTOR: 3 ?4 H.P., Hobart designed, permanently lubricated ball bearings, totally enclosed, internally ventilated. Single-phase is capacitor-start, induction-run type. Three-phase is squirrel cage, induction-run type. Single Phase 115V 11.6 Amps 200V 6.3 Amps 230V 5.8 Amps Three Phase 200V 2.5 Amps 460V 1.0 Amps ELECTRICAL: 115/60/1, 200/60/1, 230/60/1, 200/60/3, and 460/60/3 - U L Listed. Also available in 220/50/1, 200/50/3 and 220/50/3 - not submitted for U L Listing.

Here are the full specs
http://www.acitydiscount.com/specs/Hobart-D300.pdf

And here is the full manual
https://www.alfaco.com/wp-content/uploads/2016/11/D300-D300T-D300DT-Manual.pdf

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Diesel generator set: www.dieselgeneratortech.com

Every 100 feet run the next larger size

Some of these numbers don't make sense?
I have Never heard of 440v and 220v in a residential application, they are two different systems, 480 volt is typically 3 phase power, and 240v is typically single phase, more in likely you have a 200- 400 amp main service, and a 100- 200 amp secondary service for the welder, that can't be 110 @ 200 amps?
I would need more info, and pictures of actual nameplates of the equipment,
and then I could advise a safe NEC electrical code answer...

The short answer is: Yes, you can. But, read the rest of this first.

Usually, you would want to move other smaller ampacity breakers up / down / over / as needed to create the required space for the larger ampacity feeder breaker to reach the feeder wires that supply power to the sub-panel. This is preferable because these circuit have small amp loads (hence small wires) and it is easier to splice those wires with simple wirenuts instead of splicing the feeders.

I can't see your installation, and you didn't give a great deal of details - so this last part may not apply to you. If you must splice the feeders, make sure it is an electrical box - if not done in the panel itself, a junction box that is approved for the location type, size and number of conductors that enter and leave the box can be used.

Good luck!

200 amp is 3/0 copper wire up to 100 feet.
Use size 250 wire up to 150 feet.
Use size 350 wire up to 200 feet.
Be sure to put wire in conduit.
http://waterheatertimer.org/images/Wire-size-and-amp-chart-700.jpg
http://waterheatertimer.org/How-to-install-a-subpanel.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Copy following link:
Scroll down to '120 volt subpanel'
http://waterheatertimer.org/How-to-install-a-subpanel.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

This work requires a license (or qualified person) everywhere that the National Electrical Code is enforced.

If you're asking how to wire a single phase 200 amp panel from a larger, 3 phase panel of the same voltage - ONE way is to install a 2 pole - 200 amp breaker into the 3 phase panel. Provide 4 correctly sized conductors with the correct insulation in a cable or conduit between the 3 phase panel and the 200 amp single phase panel. Two of these conductors should be black and red (for 120/208 volt system) and connect to the 2 pole - 200 amp circuit breaker terminals, the third should be white and connected to the neutral bus bar. The forth should be green and is connected to the neutral bus bar as well but *only if* it is "service equipment" If it is a "main or sub panel", the green wire should be connected to the ground bus bar. The other end of the conductors should be terminated in a "main lug only" 200 amp panel. The back and red connect to "line 1" and "line 2" bus lugs, the white to the neutral bus bar that is NOT electrically connected to the panel enclosure (do not install the screw or strap between the bar and enclosure). The green must be connected by installing a separate bar that is securely fastened both mechanically and electrically to the enclosure for ground connections.

There is a great deal going on here - and plenty of variables that can change how to do this work, safely and correctly. This is an example of just ONE of many different ways to do the work for a particular installation. There is no one way that works for all situations. If your situation does not support this method - you will have an unsafe installation and subject the building and people in it to a dangerous fire / safety hazard.

Please, consult a licensed electrician before attempting this work.

There should be a full load amps or rated load amps on each of these units on the rating or nameplate. The ampacity or fuse size and wire size, which I think that's what you are wanting to know . The fuse size would be full or rated load amps times 125% and the wire size depending on the length of the run, 50 feet or less, (15 amps 14 gauge wire), (20 amps 12 gauge), (30 amps 10 gauge), and (40 amps 8 gauge).

Run 1 1/2" to 2" gray pvc conduit.