Pressure regulators

Question 1

All regulator types, sizes, capacities, and makes have three essential elements in common

Answer 1

Restricting element(fixed orfice), the measuring element (diaphragm), and the loading element( spring)

Question 2

This portion of a regulator is the point at which gas entering a regulator goes through the greatest restriction, it limits the maximum flow capacity through the regulator

Answer 2

Restricting element( fixed orfice)

Question 3

This portion of a gas regulator is usually made of neoprene. It’s attached to the valve stem and measures the outlet pressure.

Answer 3

Measuring element(diaphragm)

Question 4

This portion of a regulator increases or decreases tension, acting on the diaphragm you can raise or lower the outlet pressure with the screw adjustment

Answer 4

The loading element( spring, sometimes weight)

Question 5

This device is simply an over pressure relief valve designed to relieve excess gas pressure in order to protect the regulator and equipment downstream

Answer 5

Internal relief device

Question 6

These devices are installed in a regulator vent to restrict the volume of gas, escaping from the regulator vent in the event of a diaphragm rupture

Answer 6

Ball check leak limiting device

Question 7

This will activate on a regulator if the desired outlet pressure in the piping becomes too low from a large pressure drop

Answer 7

Low pressure trip

Question 8

These regulators are used on natural gas service to a building where the regulator reduces the service pressure to the desired building pressure

Answer 8

Service regulator

Question 9

Regulator used where the gas pressure in the building is higher than required at the appliances, typically commercial and industrial systems

Answer 9

System regulator

Question 10

This regulator is found in the valve train or appliance manifold. Set to 3.5 inches water column.

Answer 10

Appliance regulator

Question 11

This regulator is the most common type of appliance regulator incorporated into a combination gas valve

It acts on the diaphragm gas inside the combination gas valve

Answer 11

Servo regulator

Question 12

What does the gas code state about permanent propane installation regulators

Answer 12

All permanent installations require two stage regulation

Question 13

What regulator is for temporary installations only with propane

Answer 13

Dual stage regulator

Question 14

Is the pressure in the gas line on the line pressure side of a gas valve without a pilot running

Answer 14

Line pressure

Question 15

Is the pressure in the gas line on the line pressure side of the gas valve with only the pilot running

Answer 15

Standing pressure

Question 16

Is the pressure in the gas line on the line pressure side of the gas valve with the appliance running

Answer 16

Operating pressure

Question 17

Is the difference between standing and operating pressures

Answer 17

Differential pressure(pressure drop)

Question 18

Is the pressure the gas flow has reduced the line pressure for the manifold

Answer 18

Manifold pressure

Question 19

How far must’ve been termination be from a moisture exhaust duct ( dryer vent)

Answer 19

3 feet