identify the valve in the figure

a typical relief valve will releives only ---------% of its opening pressure

Small valves with bodies made of bronze or brass cannot operate at temperatures above ?

During normal operation, what holds a Relief Valve in the closed position ?

Identify the normal direction of flow in a check valve...

What is the function of the check valves ?

What is the function of the 4 way valve ?

Valve internals such as stems, gates and balls are often made of ?

What are the most common materials used in Valve Seats ?

The 4 way valves are often used to...

When operating a manual valve, turning the handwheel back 1/4 turn after opening or closing is called?

identify the valve in the figure

What type of valve being used in this process as both control valves and bypass valves ?

What is the function of gate valves ?

mostly the PZVs relieve pressure to -----------

Identify the common valve leaks as C

What could be the problem if a valve gate does not move to open or close the valve when you raise or lower the stem ?

What type of valves are being used to control the flow of low pressure seawater in this process ?

identify the valve in the figure

How can an Operator help reduce the risk of mechanical damage to a valve stem ?

A Safety Valve is operated automatically...

how needle prevent from damage the refinery instruments?

The ball valves are often used on high pressure gas or liquid lines as...

See image

what are the characteristics of ball valve

On a Double Relief System, the upstream block valve on the Relief Valve not in service must be...

The block valves on a Relief Valve in service must be...

which material is used to deal with high temperature and pressure ?

What type of valves are installed on the discharge lines of these pumps to protect them from damage by backflow?

how to inspect a manual valve for leaks

identify the valve in the figure

how the reading is recorded when inspecting a pressure relief valve?

The globe valves are mainly used as --------in a

See image

What is the function of the needle valve ?

Refinery--------------systems often use the butterfly valves

when the hand-wheel is loose what will happen?

The check valves are often fitted ----------to prevent damage from back flows

What could be the cause of no flow pressure through a valve ?

why leak happen in the valve?

The gate valves must be operated...

Identify the common valve leaks as A

---------is the build up of dirt or sludge inside a valves prevents it from opening or closing completely

------------- valves are the most commonly used in the refinery

In this diagram, what type of valves are the upstream and downstream block valves A & B ?

Which --------valves cannot be throttled ?

In this diagram, what type of valve is Control Valve C and Bypass valve D ?

identify the valve in the figure

what is the disadvantage of globe valve?

Which systems use Safety Valves to relieve excess pressure ?

if any leak is found what should to do being an operator?

What actions can maintenance take to correct fouling ?

if there is no spare and the leak is large what should do?

being an operator when you operate or inspect the valve what should look for?

What systems use Relief Valves to relieve excess pressure ?

A Safety Relief Valve be used to relieve excess pressure on...

What can cause a leak around the valve Stem ?

The butterfly valves are mainly used as control valves in ------pipelines

when not stop due to tighten the bolts then what corrective action should be taken to stop the leaks between the flanges or between bonnet

How often do operators inspect relief valves to check they are working properly?

identify the valve in the figure

On manual rising stem valve, what is the status of the valve if the stem is above the handwheel

What color are the upstream and downstream block valves in a Relief System ?

The globe valves normally operate....

Some Valve internals are made of cheaper synthetic material such as...

why the gate valve is not operated partially?

when the pressure is more than the set pressure what will happen to the relief valve?

Identify the Relief Valves (PZVs) mentioned as C

What should an Operator do if he cannot stop a valve leak ?

the last step in inspection a relief valve is ----------

Relief Valves (PZVs) operate when the pressure in a system or vessel...

What extra PPE must be worn when working on a valve serving a line that contains chemicals?

Identify the Relief Valves (PZVs) mentioned as A

Identify the Relief Valves (PZVs) mentioned as D

What is the most common material used in Valve bodies ?

Identify the common valve leaks as B

In each situation to whom you will inform being an operator?

who will inform you to remove the pressure relief valve from service?

if there is a leak and a spare relief valve is available what should do?

check valve operate by -------------

What will happen if the liquid pressure pushing on the disc of a Relief Valve reaches the set pressure ?

If the discharge line of an in-service relief valve is hot or icy cold, what is this an indication of ?

What will happen if the upstream gas or vapor pressure pushing on the disc of a Safety Valve reaches the set pressure ?

What effect does hydrogen have on some metals?

How can an Operator attempt to stop a leak between the Flanges or between the Bonnet ?

Why do Vacuum Breakers open and allow air into a tank ?

why the inspection tag is checked on the pressure relief valve ?

Identify the Relief Valves (PZVs) mentioned as B

What type of relief valves are shown in this picture ?

In normal operations, which one of these 4 valves is throttled ?

when the line is hot what it mean?

What do operators check on a Relief valve

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At what pressure do Vacuum Breaker Valves open to prevent a tank from pulling a vacuum ?