Zero Governor sensing lines and over pressure protection

Question 1

Preferred tubing for sensing line

Answer 1

stainless steel or black iron

Question 2

Describe Over pressure protection

Answer 2

Device under abnormal conditions will reduce, restrict or shut off the supply to gas

Question 3

What is a series regulator function

Answer 3

Functions as a second regulator in series with the primary gas regulator

Question 4

What is the most common over pressure protection

Answer 4

Relief device

Question 5

What is a monitoring regulator

Answer 5

Over pressure device in series with a primary gas regulator both sensing downstream pressure. Acts as the regulator if the first one fails

Question 6

Monitoring regulator should be set slightly higher than primary gas regulator

Answer 6

true

Question 7

Downside to a monitoring regulator and way to fix this issue

Answer 7

Monitoring regulator could seize from lack of movement.
To fix this the regulators should change jobs periodically

Question 8

Working monitors

Answer 8

Takes control in failure of primary reg
Is tied into upstream and down stream via sensing line
Uses elements from series and wide open monitors
Primary reg must be pilot or direct reg
Upstream reg must be pilot