Commission Pilot Operated Regulators

Question 1

It is also important to check and make sure the regulator(s) that have been installed are able to handle what

Answer 1

the inlet pressure

Question 2

increasing the restrictor setting gives you what

Answer 2

maximum stability (decreased opening speed, increased closing speed).

Question 3

by decreasing the restrictor setting it gives you what

Answer 3

tighter control (increased opening speed, decreased closing speed);
(Maximum control)

Question 4

A lower setting also provides what

Answer 4

narrower proportional band for better accuracy.

Question 5

What position has the largest flow, is most stable and easiest for startup

Answer 5

8

Question 6

What setting has the smallest (minimum) flow passage; at no point of rotation will the Type 112 restrictor be completely shut off.

Answer 6

0

Question 7

After initial adjustment, the restrictor does not need to be adjusted for maintenance or startup.
True or false

Answer 7

True

Question 8

In a Wide-Open Monitor System which regulator is the monitor regulator

Answer 8

Either

Question 9

the monitoring regulator is set to what pressure

Answer 9

Slightly higher pressure

Question 10

In the event of an open failure of the working regulator, the monitoring regulator does what

Answer 10

Takes over to ensure proper regulation

Question 11

What can occur if the monitor regulator pressure setting is adjusted too closely to the working regulator pressure setting and/or if the monitor pilot supply regulator pressure setting is adjusted too closely to the monitor regulator pressure setting.

Answer 11

Low amplitude/high frequency monitor trim oscillations

Question 12

The monitor pressure setting should be adjusted so it is at minimum is what

Answer 12

two times the pilot proportional band pressure above the working regulator pressure setting.

Question 13

When adjustments are made what she be kept in mind to not exceed

Answer 13

These adjustments must be made such that other governing pressure limits, such as casing ratings, pilot maximum differential pressures or regulatory limits, are not exceeded.

Question 14

How does a wide-open Type EZR monitoring system work

Answer 14

In a wide-open Type EZR monitoring system, system lockup will be that of the worker regulator on both an upstream monitor and a downstream monitor.

Question 15

How does a series wide-open monitoring system work

Answer 15

series wide-open monitoring system, the diaphragm of the monitor regulator will change position with every load change. On an upstream monitor with the upstream pilot exhaust piped to downstream intermediate pressure, lockup will occur at the monitor’s setpoint and the diaphragm of the monitor regulator will be fully open during normal conditions.

Question 16

For easy initial startup, set the restrictor to the what position

Answer 16

8

Question 17

What is the first step for Setup and Adjustment

Answer 17

Make sure all block and vent valves are closed.

Question 18

SLOWLY OPEN the valves in what order
(3)

Answer 18

Pilot supply and control line valve(s), if used
Inlet block valve
Outlet block valve

Question 19

For a 161 Series pilot with Type 112 restrictor, turn the restrictor to position “?” or to the desired run position.

Answer 19

2

Question 20

For wide-open downstream monitor how do you adjust the upstream and down stream pressures

Answer 20

Adjust the upstream working pilot until intermediate pressure is higher than the desired setpoint of the monitor pilot.

Adjust the downstream monitoring pilot to the desired monitoring takeover pressure.

Reduce the upstream working pilot to the normal outlet pressure setting.

Question 21

For a wide-open upstream monitor how do you adjust the upstream and downstream pressure

Answer 21

Adjust the downstream working pilot to a setpoint higher than the setpoint of the monitor pilot.

Adjust the upstream monitoring pilot to the desired monitor takeover pressure.

Reduce the downstream working pilot setting to normal outlet pressure setting.