A-A-2963
3. SALIENT CHARACTERISTICS
3.1 Standard Commercial Product. The sealing machines shall be the manufacturer’s standard commercial product except for any changes necessary for compliance with this commercial item description. A standard commercial product is a product which has been sold or is currently offered for sale in the commercial market through advertisements, manufacturer’s catalogs or brochures, and represents the latest production model.
3.1.1 UL 499 Conformance. Acceptable evidence of compliance with the requirements of UL 499 shall be a UL label or listing mark; or a certified test report from an independent’ testing laboratory acceptable to the Government, indicating the electrical materials and components offered have been tested and conform to UL 499. Canadian Standards Association CAN/CSA-C22.2 No. 68 certification may also be accepted as evidence of compliance in lieu of the UL label or listing.
3.1.2 NFPA Conformance. Acceptable evidence of compliance with the requirements of the National Fire Protection Association (NFPA) National Electrical Code Standard No. 70 or the Canadian Electric Code CAN/CSA-C22.2 No. 0-M91, shall be the manufacturer’s certified statement that the sealing machine conforms to the applicable NFPA or CSA-C22.2 requirements.
3.2 Construction. All sealing machines shall heat-seal supported or unsupported sealable material (see 2.1) by the application of heat, dwell time, and sealing pressure, with guides for accomplishing straight seals and a separate switch for energizing the heating elements. The design of the machines shall allow for easy accessibility of parts and lubrication of friction points.
3.3 Thermostat. Thermostats for the sealing machines shall be capable of maintaining a selected surface temperature, be capable of maintaining a uniform temperature on the sealing surface of a preset temperature 20 OF (± -6 OC), and shall have a heat recovery capability of 50 OF (10 OC) within 80 seconds. Temperature markings of the thermostat shall be in accordance with industry practice.
3.4 Power source. The sealing machines shall be furnished with a minimum 6 foot (1.8 m) length electric cable for connection to an electrical power source and suitable for operation on a system voltage as specified in the contract or order.
3.5 Pressure controls. The sealing machines shall
have adjustable pressure controls capable of rapid adjustment of sealing
pressures for producing effective heat-seals.
3.6 Pneumatic hose. Sealing machines requiring air pressure shall have a minimum 10 foot (3.05 m) length hose with an air-hose connector.
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