Curlew Powder Coating Oven QA.pdf

-What type of items will be finished in the oven?

The oven will be used for drying and curing any objects that have been powder coated. There is a wide range of projects that it will be used for, example: making signs for the center, Forest Service, or community.

-What type of coatings will you be applying?

Powder coating

-Is it solely being used to cure powders?

As far as I am aware, yes.

As per our partner OEM, looking at the specification it seems quite odd that there is a requirement of 160 KW with a 240-volt single phase power supply. This would require at least an 800-amp 240-volt single phase power supply. We just want to confirm that this is in fact what you are looking for.

From what I understand, the power supply was a requirement due to one companies specifications found online. The shop already has that power supply in there for the current oven.

We are unsure if these power supplies are required for other products. We do have an electrician on contract, if we must do electrical work to get it working properly, we can.

Also, the requirement of a delivery of 1/31/25 is quite aggressive for such a special design.

Can we please advise if it is possible to have a longer delivery time?

The delivery date can be pushed to whenever is appropriate. We need the item, but it isn’t urgent.

Using our nearest standard oven size to the interior dimensions requested, we will be larger than the exterior dimensions requested. The insulation a structure alone makes it larger in all directions, not to mention the obvious ductwork that would be involved. So, are there any dimensional restrictions around the oven to be aware of?

The dimensions that were listed are the minimum requirement that we are looking for. If we can get a larger one, that would be great. The area in mind for this oven is in an old vehicle maintenance bay. There is plenty of room for a larger item if needed.

Regarding ductwork, we were hoping to use the existing system in place. If additional modifications are needed, our maintenance personnel could make that happen.

The request for two completely different controllers to simply display in “degrees F” and “degrees C” seems like overkill. This can simply be switched on one controller and is very unnecessary to have 2 units to do this. Is it OK to use just 1 unit to show both F and C?

Having one display controller will be sufficient.

For an oven this size, and per our standard design, we use bi-parting doors in lieu of a single swing door. It makes the doors lighter as well. Is it OK to use the standard bi-parting doors?

This is acceptable and I like this idea to potentially prevent workplace injuries.

160 kW in an oven this size is nearly double of what our standard design is. I believe it’d be difficult to even fit this much. Is it OK to use our standard design and amount? Please note, our amount is calculated based on load size and oven size. Knowing the oven size, I’d just need the load size.

I am unsure of the load size. This will have to be discussed between the electrician, the trade instructor, and our AWPO.

Galvanized steel interior is an irregular choice for an oven. Oven companies I know of use aluminized steel as an industry standard. OK to do this?

This is ok.

What is the product and what are the parts? (steel, aluminum, etc? wheel rims, shelving, etc?)

All of the above. Products vary on a regular basis.

What are the approximate dimensions of the product?

Size also varies on a regular basis. They have created small projects such as a metal rose and large projects such as vehicle bumpers. As an example, I know we have painted signs for the Natl. Forest that were 6-7 feet in length and 4-5 feet wide.

What is the approximate weight of the product? (maximum in a batch in the oven at a single time is needed)

Products can weight anywhere between a pound or two to a few hundred pounds.

How will you be loading & unloading the parts? (ie, loaded onto carts & carts wheeled in, parts loaded onto pallets and pallets loaded by fork truck, etc.)

Most parts will be hand carried into the oven and more than likely hung from the ceiling. Some products may be carted or forklifted into place.

Standard concrete is rated to 500F. It’s one reason ovens typically have a max temp of 500F. I see this also requests 500F max oven. However, it states the oven must be 2” off the ground. Not only is this unnecessary to have it 2” off the ground, but it will make it more difficult to load. We can offer a 12-gauge aluminized floor to protect the floor and still make it so you can wheel in a cart of parts or easily walk into the oven. Does that work?

This would be great!!!

If parts will be loaded onto rack or shelf of some kind, is it open or perforated (grated) to allow air to pass vertically through/around the product freely to the ceiling? Or are the parts hanging to allow air to pass around them?

Most of the time, parts are hung to allow consistent curing all the way around. Larger products will be cured in sessions and need the space to allow air to flow freely.

What is the normal operating temperature?

400 Degrees F

What is the process time? (How long will the parts be in the oven?)

15 Minutes

Will the parts be loaded into a preheated oven or will the oven be starting from “cold” every batch?

Pre-Heated

Do you have any specific temperature uniformity requirements?

No, it’s always 400 degrees with powders

What is the maximum amount of powder that will be in the oven during a single batch?

(this is critical for NFPA and safety reasons)

This question is confusing. They will spray a piece of steel until it is coated, then place the project into the oven. Maybe a lb or two of powder?

What are the dimensional restrictions? (Smallest door size the oven will be going through and ceiling height where oven will be located)

There is a 12’ bay door and the ceilings are roughly 15’ tall.

1. Does it need to be 2-inch walls? Our standard (industry standard) is 4-inch walls.

2. What do you mean by "2” off of the ground"? Do you need a floor? So, no flat floor for a parts cart, but an insulated floor with a designed track for a cart?

These dimensions were found online from a specific vendor. Industry standard will be fine.