The valve shown in the illustration is designed to seal against positive pressure leaks around the valve stem by the use of __________. See illustration GS-0047.
A
a two piece rotating mechanical seal
B
rubber "O" rings
C
an external sealing line
D
adjustable packing gland
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Question 1 / 205eccef9bbacbc34ba4d4536a
Question 1 of 205eccef9bbacbc34ba4d4536a
The valve shown in the illustration is designed to seal against positive pressure leaks around the valve stem by the use of __________. See illustration GS-0047.
The valve shown in the illustration is designed to seal against positive pressure leaks around the valve stem by the use of __________. See illustration GS-0047.