Dairy Establishment Inspection Manual – Chapter 19 Appendices
Appendix 7 Valves

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Figure 1 - Close Coupled Outlet Valves

Image - Close Coupled Outlet Valves. Description follows.

Description of image - Close Coupled Outlet Valves

This figure shows the two types of close coupled outlet valves. In the first valve (Type 1), the smallest diameter of the large end of the flare (b) must be greater than the inside diameter of the outlet line (d) plus the depth of the flare (h). Also, the greatest distance from the valve seat to the small end of the flare (a) must not be more than the diameter of the outlet line (d). In the second close coupled valve (Type 2), the seat of the valve is flush with the inner wall of the pasteurizer. The greatest distance from the valve seat to the inner wall of the pasteurizer (a) must not be greater than the inside diameter of the valve outlet (d). The diameter of this passage must be uniform.

Figure 2 - Inlet Leak Protector Valve

Image - Inlet Leak Protector Valve. Description follows.

Description of image - Inlet Leak Protector Valve

This figure shows an inlet leak protector valve. This is a valve provided with a leak-detecting device, which when the valve is in any closed position, will prevent (redirect) leakage of milk or milk product past the valve.

Figure 3 - Importance of Proper Stops on Plug Valves

Image - importance of Proper Stops on Plug Valves. Description follows.

Desciption of image - Importance of Proper Stops on Plug Valves

These three figures show the importance of proper stops on plug valves. The first image shows the plug valve opened. The second image shows the plug valve closed. The third image shows the plug valve improperly closed.

Figure 4 - Air Space Heating

Image - Air Space Heating. Description follows.

Description of image - Air Space Heating

This figure shows an air space heating system. The system consists of a steam strainer, steam trap and an auxiliary steam trap - culinary steam set up. The system connects to the top of the pasteurizer and uses culinary steam to maintain minimum air space temperatures.

References

  • Grade "A" Pasteurized Milk Ordinance 1993
  • U.S. Department of Health and Human Services
  • Public Health Service, Food and Drug Administration

Note: For addition details see Part Two of the 3A Accepted Practices for Fittings Used on Milk and Milk Products Equipment and Used on Sanitary Lines conducting Milk and Milk Products Number 08-17 Rev.

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