OQ-6011 Mueller No-Blo Stopcock changer Flashcards
(16 cards)
What is a Mueller no- Blo stopcock changer used for?
To remove and replace a stopcock on a service riser without creating a gaseous atmosphere
What are the mueller No-Blo stopcock changer components ?
A. Shaft crank
B. Stuffing box
C. Plugging Unit
True or false
The safety clamp must be used at all times
True
What is the MAOP for using the Mueller NoBlo stopcock
The MAOP is 60 psig
This means the MUELLER NOBLO STOPCOCK changer cannot be used on any riser exceeding 60 psig
The riser will have 1 band steel installed if what
If pressure is between 61 and 125 PSIG
The riser will have 2 band steel installed if what
To identify pressure greater than 125 PSIG
Do you have close stopcock to remove it?
Yes
What lubricant do you use
Mueller Rubber Stopper Lubricant
When you prepare the plug-in unit for use, you measure the blank of the port opening to be sure that it is equal to or greater than the minimum and widths
Width
What are the sizes for the mhelper no Blo stopcock changer
Three-quarter to 2 inch
True or false when you turn the shaft tube until the small arrow on the tapered portion of the shaft tube is lined up with the head of the stock cock
True
How far down does the upper shaft tube clamp need to be from the top of the nut on the safety clamp
3 inches
The limit of travel occurs when the shop nut comes into contact with a shoulder on the shaft. This will occur when the end of the shaft is approximately blank inch to blank inch beyond the end of the shaft crank sleeve.
3/8 inch to 1/2 inch
What do you do if the stock comes in contact with the Lokee pin before making a tight connection with the pipe?
Unscrew the stock cock from the piping
Remove the locating pin
Reassemble the stop cock to the pipe
Rotate the shaft, crank counterclockwise until the number of blank noted above is exposed at the end of the threaded shaft
Threads
