Grieve Ovens Cure, Dry Parts

Originally titled 'Ovens Cure, Dry Parts'

Grieve’s No. 889 is a 350°F gas-heated walk-in oven used for curing carbon/epoxy components hung on monorail tracks. No. 922 is an electrically-heated, 500°F cleanroom cabinet oven used for drying precision parts in baskets.

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Grieve’s No. 889 is a 350°F gas-heated walk-in oven used for curing carbon/epoxy components hung on monorail tracks. It features workspace dimensions of 36 × 282 × 48 inches, and 350,000 Btu/hr installed in a modulating natural gas burner to heat the oven chamber, while a 10,000-cfm, 7 ½-hp recirculating blower provides combination airflow to the workload.

The oven also offers 4-inch insulated walls, a top-mounted heating chamber, and aluminized steel interior and exterior, as well as five monorail tracks mounted at the top of its workspace. All safety equipment required by IRI, FM and NFPA Standard 86 for gas-heated equipment are installed, including a 325-cfm, 1/3-hp powered forced exhauster. Controls include a digital programming temperature controller and six-point strip chart recorder with one-point air temperature, two-point vacuum and three-point load temperature recording capability.

No. 922 is an electrically-heated, 500°F cleanroom cabinet oven used for drying precision parts in baskets. It features 30 Kw installed in Incoloy sheathed tubular heating elements to heat the load and workspace dimensions of 36 × 36 × 51 inches. A 1,500-cfm, 2-hp recirculating blower provides horizontal airflow to the oven, and two 30 × 24 × 6-inch stainless steel, high-temperature, HEPA recirculating filters further purify the air. The ductwork is easily removable to expose filters for inspection or replacement.

The No. 922 also offers 4-inch insulated walls, aluminized steel exterior, and type 304 2B-finish stainless steel interior with continuously backwelded seams. The exterior is finished in white epoxy paint with a #4 brushed-finish stainless steel door cover and control panel face. The oven is also equipped with double doors and positive-latching door hardware. 

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Can Electroplated Fe-C be an Environmentally Friendly Alternative to Hard Chromium and DLC Coatings?

Electroplated FeC is an efficient surface treatment based on non-aggressive chemicals with a deposition rate of ~20 μm/h at a process temperature of 50°C.  The FeC coating is carbide-free and temperature stable up to ~250°C with a hardness of 750 HV, which is comparable to frequently applied hardened steels.  The FeC coating has reasonable friction properties and have high affinity towards lubricants because of incorporated amorphous carbon.  Hence, for certain applications, the FeC coating might be an interesting wear-protective alternative to hard chromium and to PVD-deposited low-friction diamond-like carbon coatings (DLC’s), which are rather difficult and costly to deposit on larger items.