Figure 1 – Close coupled outlet valves
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) is 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) is not 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) is not greater than the inside diameter of the valve outlet (d). The diameter of this passage is uniform.
Figure 2 – Inlet leak protector valve
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
Description 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
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.
Reference:
- Grade "A" Pasteurized Milk Ordinance 1993, U.S. Department of Health and Human Services, Public Health Service, Food and Drug Administration