Flange shield

Provide flange shields to prevent operator exposure... 

There are available flange shields (see Fig. 6.7) which are capable of retaining small drips and at the same time, giving warning. These shields are either fabricated in clear PVC or a material that will clearly discolour when drips occur. Shields are also available to encase many types of valves. 

Figure 7. Ion source and reaction chamber for the study of ion-molecule reactions at different temperatures. Notation used is same as in Figure 4 except CB = copper block, EL = electrode attached to pressure reducing capillary, TC = thermocouple, TS = thermal shield, ISP = evacuated space reduces thermal conductivity from CB to flange. From Klassen, J. S. Blades, A. T. Kebarle, P. ). Am. Chem. Soc. 1996, with permission.

In the present state of art, the CUORE cryostat will consist of a room temperature enclosure, radiation shields at 45 K and at 4K, both cooled by pulse tubes. The Still radiation shield at about 700 mK (including lead shielding), 50 mK and a mixing chamber shield will be cooled by the different stages of a DR. All shields and the crystal + lead will be suspended from the top flange (see Fig. 16.7). 

High vacuum flange Pump casing Forevacuum flange Safety valve for gas dixharge Thermal radiation shield Baffle... 

Figure 5 shows the displacer-crosshead assembly and the pressure vessel from which it has been removed. The pressure vessel is provided with a flange by which it is mounted to a vacuum chamber for experimental testing. This view shows the liquid-nitrogen coil around the heat exchanger and the intermediate level of the pressure vessel to intercept heat leaks from the room-temperature end. This coil also provides cooling to a radiation shield, not shown. The warm-end regenerator is housed within the warm-end displacer ... 

---