COMPETITIVE INITIATIVE POWDER COATING SPRAY SYSTEM SUPPORT EQUIPMENT TECHNICAL SPECIFICATION

Transcription

1 COMPETITIVE INITIATIVE POWDER COATING SPRAY SYSTEM SUPPORT EQUIPMENT TECHNICAL SPECIFICATION The Support Equipment (SE) Powder Coating Spray System consists of a convection-type curing oven, powder coating booth, and manual spray equipment. 01 Convection-Type Curing Oven The EPCON Direct Gas Fired Industrial Oven No. 461 is a batch-style oven with double doors at each end that is designed for operating temperatures of 130 º F to 500 º F. Specifically, the unit is used to cure powder coatings on SE. The unit shall incorporate the following features: Overall Dimensions: Approximately 14'5" wide x 15'5" high x 20'10" deep Power Requirements: 460V, 60 Hz, 3 phase Gas Requirements: 1,200 cfh service at 8" WCP at burner; natural gas at 1,080 Btu/ft 3 Space Requirements: A clear door opening of 12' wide x 14' high for installation of the oven Other: Installation drawings and instructions are provided with the units. Interior Dimensions: 10' wide x 10' high x 20' deep Shipping Weight: Approximately 10,000 lb. Operating Temperature Range: From 130 º F to 500 º F; maximum operating temperature is 500 º F +/- 10 º F in work area after oven normalizes Lighting: One fixture per module, for a total of eight Air Recirculation: Blower is furnished with extra heavy shaft, belts, drives, heat slinger, and heavy-duty bearings with expansion shields. One plug-type recirculation fan shall deliver 8,000 cfm against 2" S.P. in order to provide approximately four air changes per minute. Supply air is through two wall ducts, 20' lengths of oven and return air is through ceiling duct. All ducts are made of #18-gauge aluminized steel and shall have 5" square adjustable ports on approximately 15" centers, with all ports adjustable to regulate airflow. A belt guard is included and installed on the blower drive. The recirculation fan is driven by a 7.5-hp motor controlled with a variable pitch pulley mounted on an adjustable base. Exhaust System: The exhaust blower is an 8"-diameter wheel unit powered by a 1/3-hp, 3 phase, 230/460V, 60-cycle motor with a fan mounted on the oven roof with a steel frame. Exhaust ductwork shall consist of an 8"-diameter roof pickup connected to an exhaust fan plenum chamber. The exhaust blower shall deliver 750 cfm at ½" SP.

2 Burner: The burner shall deliver 1,200,000 Btu and is equipped with a variable orifice to regulate Btu input. Operation at 500 º F shall require an hourly input of less than 800,000 Btu. The burner is located in the combustion chamber, separate from the work chamber. Construction: Oven panels and framing constructed from #10-gauge steel channels. Door borders capped with #14-gauge steel channels. Oven panels assembled over a steel interior framework of welded 3" x 3" x 3/16" steel angle. Panels are fabricated from #18-gauge aluminized steel on the interior and #18- gauge corrosion-resistant steel on the exterior, spot-welded and interlocked construction. Oven panels are 5" thick, reinforced with steel ribs, with rib sections perforated for minimum heat transfer. Panels are constructed with tongue-and-groove seams. Doors are fabricated from #18-gauge, 5" insulated panels with #14-gauge steel interior framing and borders. The oven is designed for installation on a level concrete floor. The exterior of the oven is painted with two coats of gray enamel; the interior surface is unpainted. Insulation: Panels and doors are filled with mineral wool insulation, with 5" of insulation in the corners. Doors: One set of doors is located at each end to allow for batch-style operation. The full clear door opening is at least 10' wide x 10' high. Doors are furnished with heavy-duty hinges, explosion latches, tadpole seals, and wipers at the floor line. The controller, switches, and indicating lights are mounted on the faces of the doors. Standards: All equipment is in conformance with NFPA Bulletin No. 86 for Class A ovens and IRI codes. The control panel is U.L.-listed. Operator Safety: Operator safety controls shall include, but not be limited to, electronic flame supervision, high temperature cutoff, process timer, and alarm. Doors are equipped with explosion-relief latches. Air Heater: A direct-fired air heater is included. The air heater is enclosed in a #18-gauge insulated housing with a housing 4' wide x 4' high x 10' long and mounted on the roof of the oven with steel framing. A removable inspection panel is furnished on the roof of the air heater and a 5" fresh air filter is located on one side of the air heater to provide fresh makeup air. Electrical Control Panel: The control panel is completely wired and shall require only that the receiving activity provide 3-phase electrical service for connection to the panel board. The control panel is attached to the oven sidewall. The following controllers are incorporated into the system: One thermocouple in the sidewall One high-temperature limit One temperature display for the selectable thermocouples Combustion air blower Fan interlock Power supply.

3 02 Powder Coating Spray Booth The Abrasive Blast Systems powder coating spray booth is a self-contained work environment that includes lighting, dust collection apparatus, a shallow reclaimable floor (optional), and an electrical control panel. Specifically, the unit shall be used to apply powder coating to SE. The unit shall incorporate the following features: Overall Dimensions: Not to exceed 16'5" wide x 22'9" deep x 8'6" high (without reclaiming floor: not to exceed 11'5" wide x 17'8" deep by 7'6" high) Power Requirements: 460V, 60 Hz, 3 phase for booth; 120V, 60 Hz for controls/lighting Air Requirements: 6 90 psi Other: Installation drawings and instructions shall be provided with the units Inside Work Area: 135" wide x 180" deep x 87" high Shipping Weight: Approximately 5,100 lb. Design Cross-Flow Air Circulation: 106 ft./min. Air Volume: 4,500 cfm Air Velocity/Airflow: 140 fpm, seasoned filters; 160 fpm, clean measured at face of booth; airflow is from front to rear in a slightly downward horizontal direction Fans: Three, each with individual controls Blower Motor: 5 hp, 460V, 60 Hz, 3 phase TEFC Power Modules: Two each, located at the rear of the booth Dust Collection Modules: Two modules are included with the unit. Modules shall contain a 5-hp, 3,450 rpm, /3/60 TEFC motor and aluminium fan Dust Drawers: 1.5-ft 3 capacity per dust collection module, for a total of 3 ft 3 Electrical Control Panel: The electrical control panel shall be designed to enable cartridges to be cleaned by continuous pulsing, pulsing through pressure drop control, and after-shift cleaning. The control panel shall be installed at the 460-V power source and shall include flange-mounted disconnect, magnetic motor starters, control power transformer with 100 -A extra capacity, timer, photohelic gauge mounted in the door, start/stop button, push to test light, all necessary fuses, and starter heaters Lighting: One 40-W, two-bulb, fluorescent light fixture approximately 4' long per dust collection module Filtration: % filtration efficiency for a total of 48 filter cartridges (six per module); filters shall be cleanable via automatic pulsing using compressed air; filters contain no outer liner; minimum 226-ft 2 filter area per cartridge. System filters 4,500 cfm/minute/module (clean filters), 3,900 cfm/minute/module (seasoned filters)

4 Reclaiming Floor (Optional): Floor shall be a full vacuum floor approximately 11' wide by 12' deep with a 2"-thick grating to support a 5,000-lb. distributed load. The recovery ductwork shall include a 1,600-cfm cyclone separator stand and recovery barrel. In addition, one dust collector with automatic reverse-pulse cartridge cleaning and a 7.5-hp exhauster with a muffler shall be included. Construction: NEMA-12 enclosure constructed from 12- and 16-gauge steel, ASA 61 gray enamel finish, allowing for entry and exit from one side only. The enclosure does not include doors. The interior lining shall be of galvanized steel. Panels shall be designed to resist sparks, abrasion, oil, dust, and dirt. 03 Manual Powder Spray System The Ransburg-Gema MPS-1F manual powder system is a stand-alone manual electrostatic powder coating application system that includes a stand and interconnecting hoses and fittings. The manual powder system shall include a PG-1 powder paint spray gun, PGC control unit, hopper, and PI-3 pump as specified below. Specifically, the unit is used to apply powder coating on SE. The unit shall incorporate the following features: Power Requirements: 110V, single phase, 50/60 Hz Compressed Air Requirements: psig, 15 cfm Maximum Oil Vapor in Compressed Air: 0.1 ppm Maximum Water Vapor in Compressed Air: 48 grains/ft 3 Other: Coalescing filter and oil separator for the air line are recommended Dimensions: Not to exceed 18"wide x 43" high x 28" deep Rated Input Voltage to Gun: 10V Rated Output Current to Gun: 140 ma Maximum Air Consumption: 8 cfm Minimum Air Pressure Supplied by System: 25 cfm Hopper: Fluidized Flow: 400 gpm Polarity: Negative Cable Length: 19.7 feet Construction: NEMA -2 enclosure constructed from 12- and 16-gauge steel, ASA 61 gray enamel finish; check valves and quick disconnects are included with injector pump; connection to hopper is plug-in type. All components of the system is compatible with each other. Shipping Weight: Approximately 510 lb.

5 Minimum Requirements Gun: Gun: One per unit, including integrated cascade power supply and self-cleaning electrode Trigger: One finger reed switch Rated Input Voltage: 10V eff Rated Output Voltage: 98 kv Gun Weight: 25 oz., not including cable Minimum Requirements Control Unit: Controls: Voltage 100-kV analog meter, 100-A analog current meter, conveying air meter Displays: 100-kV voltage LED, 100µA LED current Conveying Air: 0-4 bar/2-8 m 3 /hr Supplementary Air: m 3 /hr/flowmeter Rinsing Air: Flowmeter Minimum Requirements Injector/Pump: Pump: 400-gpm flowrate. All necessary check valves and quick disconnects shall be included. Minimum Requirements Hopper: Capacity: 50 lbs. Construction: Stainless steel, with porous membrane for powder fluidization