New York Codes, Rules and Regulations › Title 1 - DEPARTMENT OF AGRICULTURE AND MARKETS › Appendices › Appendix 7

Current through Register Vol. 46, No. 28, July 10, 2024
AIR FOR DRYING EQUIPMENT AND AIR UNDER
				PRESSURE--PRODUCT-CONTACT SURFACES
(cf. Part 3)
I. Air
			 for Drying Equipment
Filter Media.--Intake air filter media shall consist of cotton
				flannel, wool flannel, spun metal, activated carbon, activated alumina,
				nonwoven fabric, absorbent cotton fiber, electrostatic, or other suitable
				materials which, under conditions of intended use, are non-toxic and non-
				shedding and which do not release toxic volatiles or other contaminants to the
				air, or volatiles which impart any flavor or odor to the product. Chemical
				bonding materials contained in the media shall be non-toxic, non- volatile and
				insoluble under all conditions of use. Disposable media are not intended to be
				cleaned and re-used.
Filter Performance.--The air supply system and/or ducting shall
				be such that the air supply is caused to pass through suitable air filters
				properly installed before coming in contact with product-contact surfaces of
				the drying system. Supply air filters for air which will be heated before it
				comes in contact with the product shall be of a design selected to operate at a
				face velocity, and installed in a manner which will allow the filter
				manufacturer's rating to be 90 percent or higher, when tested in accordance
				with the ASHRAE Synthetic Dust Arrestance test.A
Supply air filters for air which will not be heated before it
				comes in contact with the product shall be of a design, selected to operate at
				a face velocity, and installed in a manner which will allow the filter
				manufacturer's rating to be 85 percent or higher when tested in accordance with
				the ASHRAE Atmospheric Dust Spot Method.A
II. Air Under Pressure--Product-Contact
			 Surfaces
MATERIAL
Filter Media.--Air intake and pipeline filters shall consist of
				fiberglass, cotton flannel, wool flannel, spun metal, electrostatic material,
				or other equally acceptable filtering media, which are non- shedding and which
				do not release to the air, toxic volatiles, or volatiles which may impart any
				flavor or odor to the product.
Disposable media filters shall consist of cotton flannel, wool
				flannel, spun metal, nonwoven fabric, U.S.P. absorbent cotton fiber, or
				suitable inorganic materials which, under conditions of use, are non-toxic and
				nonshedding. Chemical bonding material contained in the media shall be
				nontoxic, nonvolatile, and insoluble under all conditions of use. Disposable
				media shall not be cleaned and reused.
Filter Performance.--The efficiency of intake filters shall be
				at least 50 percent as measured by the National Bureau of Standards' "Dust Spot
				Method"B using atmospheric dust as the test aerosol.
The efficiency of either air pipeline filters or disposable
				filters shall be at least 50 percent as measured by the DOP (Dioctyl
				1-phthalate fog) testC.
Piping.--Air distribution piping, fittings, and gaskets between
				the terminal filter and any product or product-contact surface shall be
				sanitary milk piping, except where the compressing equipment is of the fan or
				blower type. When the air is used for such operations as removing containers
				from mandrels, other nontoxic materials may be used.
FABRICATION AND INSTALLATION
Air Supply Equipment.--The compressing equipment shall be
				designed to preclude contamination of the air with lubricant vapors and fumes.
				Oil-free air may be produced by one of the following methods or their
				equivalent:
1. Use of a carbon ring
			 piston compressor.
2. Use of
			 oil-lubricated compressor with effective provision for removal of any oil vapor
			 by cooling the compressed air.
3.
			 Water-lubricated or nonlubricated blowers.
The air supply shall be taken from a clean space or from
				relatively clean outer air and shall pass through a filter upstream from the
				compressing equipment. This filter shall be located and constructed so that it
				is easily accessible for examination, and the filter media are easily removable
				for cleaning or replacing. The filter shall be protected from weather,
				drainage, water, product spillage, and physical damage.
MOISTURE REMOVAL EQUIPMENT.--If it is necessary to cool the
				compressed air, an aftercooler shall be installed between the compressor and
				the air storage tank for the purpose of removing moisture from the compressed
				air.
FILTERS AND MOISTURE TRAPS.--Filters shall be constructed so as
				to assure effective passage of air through the filter media only.
The air under pressure shall pass through an oil-free filter
				and moisture trap for removal of solids and liquids. The filter and trap shall
				be located in the air pipeline downstream from the compressing equipment and
				from the air tank, if one is used. Air pipeline filters and moisture traps
				downstream from compressing equipment shall not be required where the
				compressing equipment is of the fan or blower type.
A disposable media filter shall be located in the sanitary air
				pipelines upstream from and as close as possible to each point of application
				or ultimate use of the air.
AIR PIPING.--The air piping from the compressing equipment to
				the filter and moisture trap shall be readily drainable.
A product-check valve of sanitary design shall be installed in
				the air piping downstream from the disposable media filter to prevent backflow
				of product into the air pipeline, except that a check valve shall not be
				required if the air piping enters the product zone from a point higher than the
				product overflow level which is open to the atmosphere.
The requirements of this section do not apply when the
				compressing equipment is of the fan or blower type. See illustrations depicting
				various air supply systems.
Note.--For additional details, see 3-A Accepted Practices for
				Supplying Air Under Pressure in Contact With Milk, Milk Products, and
				Product-Contact Surfaces.
References
A The method of making these tests will be found in the
				following reference: Method of Testing Air Cleaning Devices, ASHRAE Standard
				52-76. Available from The American Society of Heating, Refrigerating, and Air-
				Conditioning Engineers, Inc., 345 E. 47th St., New York, New York 10017.
B Dill, R. S., A Test Method for Air Filters. Transactions of
				the American Society of Heating and Ventilation Engineers, 44:379, 1938.
C DOP-Smoke Penetration and Air Resistance of Filters, Military
				Standard No. 282, section 102.9.1 Naval Supply Depot, 5801 Tabor Avenue,
				Philadelphia, Pennsylvania 19120.
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