acads (08-006) covered keywords description supporting material

ACADs (08-006) Covered

Keywords

Description

Supporting Material

PLANT STATUS

Stop when unsureAsk questions

Follow procedures

Evaluate your work area Take time to do it safely

You can leave it better than you found it!

What are the critical steps of the task I am going to perform? What document describes it? Do I understand it?

What is the worst thing that can happen and how can I prevent it?

What else could go wrong?

What safety and/or radiation protection considerations?

Is my training and are my qualifications up- to- date?

PVNGS Maintenance Training Feedback COURSE INFORMATION

Course No./Name: NMF35 Fire Protection Date: Today’s Date

PARTICIPANT INFORMATION INSTRUCTOR INFORMATION

Name:

Sta. No. Phone #

Name Bill Winn

Sta. No. 6190 Phone # 2514

Please provide feedback on the course to allow the training to continue to improve. Identify if your expectations were met and provide any specific comments or explanations as desired

If you were not required to attend, would you still have wanted this training? Yes No NA

Expectation Met? Circle One

Y N

EXPECTATION/COMMENTS

1. The training was relevant to my job. It was up-to-date, effective, and challenging

2. The training materials (handouts, transparencies, and equipment e.g.) were useful and helped in the learning.

3. Good work practices were properly emphasized, e.g., self-verification, Prevent Events, STAR and safety.

4. The training material was communicated well with a good learning environment. I felt comfortable participating in class.

5. The training setting (classroom and/or lab) was appropriate and the time was used efficiently (appropriate amount of time for the training)

Additional Comments/Suggestions (use the back if you need more room):

Return to the Instructor or to Station 6190

COURSE TERMINAL OBJECTIVE

Given a maintenance situation, the Maintenance Mechanic will describe the rework of Fire Protection system components. Mastery will be demonstrated by obtaining a score of 80% or more on an end of course examination.

LESSON TERMINAL OBJECTIVE

Without the aid of reference material, the Maintenance Mechanic will describe the safety precautions associated with the Fire Protection

system, as well as the basic operation of the subsystems on which the Mechanic performs maintenance. Mastery will be

demonstrated by obtaining a score of 80% or more on an end of course

exam.

LESSON ENABLING OBJECTIVESEO01 State the purpose of the Fire Protection system.

EO02 State the purpose of fire barriers.

EO03 List the subsystems of the Fire Protection system.

EO04 List the safety precautions associated with working around Carbon Dioxide.

EO05 List the areas protected by the Carbon Dioxide system.

EO06 List the safety precautions associated with working around Halon 1301.

EO07 List the areas protected by the Halon system.

EO08 Describe the operation of the Filled Pipe system.

EO09 Describe the operation of the Deluge system.

EO10 Describe the operation of the Pre-Action system.

EO01 State the purpose of the Fire Protection system.

The purpose of the Fire Protection System is to provide fire suppression actuation and annunciation in the event of fire conditions or FP system actuation.

EO02 State the purpose of fire barriers.

The purpose of Fire Barriers is to divide the plant into isolable fire restricting areas.

EO03 List the subsystems of the Fire Protection system.

•Carbon Dioxide (CO2)

•Halon

•Water systems

EO04 List the safety precautions associated with working around Carbon Dioxide.

A.CO2. Precautions

1.Carbon Dioxide extinguishes a fire by displacing oxygen and by formation of heat removal.

1.Carbon dioxide can cause suffocation. Do not enter areas flooded with CO2. Use SCBA if entry

is required.

1.Persons overcome by CO2 should be treated the

same as drowning victims. CO2 discharge

temperature may be as low as -110 degrees F and can cause severe skin damage.

A.CO2. Precautions



is required.




A.CO2. Precautions



is required.




• Carbon Dioxide extinguishes a fire by displacing oxygen and by formation of heat removal.

• Carbon dioxide can cause suffocation. Do not enter areas flooded with CO2. Use SCBA if entry is required.

• Persons overcome by CO2 should be treated the same as drowning victims. CO2 discharge temperature may be as low as -110 degrees F and can cause severe skin damage.

EO05 List the areas protected by the Carbon Dioxide system.

Battery rooms - A, B, C, and D of all three units.

ESF (Engineered Safety Features) Switchgear Rooms

Non-Essential Switchgear rooms

EO06 List the safety precautions associated with working around Halon 1301.

• Halon Fire Protection system provides unique challenges due to the nature of the gas.

• It replaces hydrogen atoms with halogen atoms.

• Gas is Pressurized to 600 psig and requires caution during testing. No "odorizer" due to Halon's non-toxicity at low concentrations.

•Safe to breathe in concentrations less than 10% and periods less than 1 minute. •Decomposition occurs at approximately 900 degrees F which can produce harmful products.

•Reentry after discharge should not be attempted without respiratory protection or until area has been properly vented.

EO07 List the areas protected by the Halon system.

Rooms which are vulnerable to fire or water spray damage are:

• Computer Rooms, 140'CB

• Communication Room, 120'CB

• Inverter Room, 120' CB

• Remote Shutdown Rooms A & B, 100'CB

EO08 Describe the operation of the Filled or Wet Pipesystem.

• When a fire occurs, the heat produced will fuse a sprinkler causing water to flow.

•Alarm valve clapper is opened by the flow

and allows pressurized water to fill the retarding chamber.

•Flow overcomes the retarding chamber's small capacity drain and fills, thus increasing pressure, which closes the pressure switch and sounds an electric alarm bell.

•Alarms will continue to sound as long as there is a flow of water in the system. water will flow until it is shut off manually.

• Water flow must be manually reset.

EO09 Describe the operation of the Deluge system.

• The Deluge valve prevents water from entering the sprinkler piping until required; this then is termed a dry pipe system.

• The deluge valve has three chambers, top Pressurized, outlet (normally dry) and inlet (pressurized).

INLET

OUTLET

UPPER

•The chambers under normal conditions are separated by the valve clapper.

•In the set (normal) position, supply water pressure is transmitted through an external by-pass line, check valve and restriction orifice from the inlet chamber to the top chamber.

•The pressure is trapped in the top chamber by a normally closed solenoid valve, normally closed P.O.R.V., normally closed hydraulic manual release valve.

•The pressure trapped in the top chamber holds the clapper on the seat because of the two-to-one area differential design.

•The center chamber remains dry. Upon detection the control panel energizes the solenoid valve which opens, or manual release, the pressurized water in the top chamber escape more rapidly than it can be supplied through the by-pass restricted orifice.

•The deluge valve remains open until the flow from the top chamber is stopped manually, water supply valve is shut and control unit reset.

•The water pressure in the lower chamber then raises the clapper and allows water to enter the center chamber, sprinkler piping and piping to the pressure operated relief valve.

•During this time the control panel is providing power for audible alarms.

Deluge Systems

Bronze seat

EPDM rubber diaphragmBronze clamp ring

Teflon coated ductile iron clapper Ductile iron body

EPDM & stainless steel seat rubber

Deluge Systems

•Deluge valves can be equipped with a Strainer, located on the inlet side of the deluge valve, that is designed to screen out any solid contaminates in the system.

•Turning the strainer hand wheel removes debris collected on the screen.

•The strainer is equipped with a flush valve which allows flushing of the system while the operator turns the hand wheel.

•Each deluge valve is equipped with an isolation valve.

•Most of these valves can have packing addedwith the valve in-service. •Located on the side of the valve at the packing gland is a bolt and packing injector. •By removing the bolt from the packing injector individual sticks of packing may be added.

•It is recommended that the sticks be cut in half and added one half at a time by inserting the stick and reinstalling the bolt, tightening using good mechanical judgment.

•With the Fire Departments assistance you may operate the valve to make sure the valve stem will move without binding.

•Continue to add sticks and operate the hand wheel until the leak is stopped.

Packing bolt (item 29)

Packing injector (item 28)

Deluge Systems

Model E-1 Deluge Valve & Conventional Deluge Valve Trim

Note: Deluge valve MUST be installed above a water supply control valve.

• During trouble shooting for leaks, the maintenance technician may want to use an Ultra Sound device to locate the leak. Most of the deluge type valves are connected to a common drain line with several others and finding the specific valve or component that is leaking can involve considerable disassembly.

CONVENTIONAL DELUGE VALVE TRIM

•INSTALLATION &

PURPOSE

Deluge Systems

Install the Deluge Valve above a water supply control valve

Deluge Systems

A flow test valve is connected to the inlet chamber of the deluge valve

NFPA 25 (1992 ed) recommends “Main Drain Test” to be performed quarterly to determine if there has been a change in the water supply piping or control valves.

Deluge Systems

Priming line

Connect priming line supply below water supply control valve

Strainer

Priming valve (normally open)

Restricted orifice

Check valve

Deluge Valve Trim

1/16” Restricted orifice prevents the priming chamber from re-filling at the same rate as the water is being released through the orifice of the releasing device.

Spring loaded check

1/16 Restricted orifice

¼” Strainer

¼” Priming line ball valve

Deluge Systems

Auxiliary drain (normally Closed) Open to drain outlet & system piping after operation

Drip check allows moisture to escape from outlet chamber. It seals against notched seat when outlet chamber is pressurized. To open drain cup

Trim piping connected to outlet chamber

Deluge Systems

½” (15mm) NPT for alarm pressure switch

Alarm shut off valve (normally open)

¾” (20mm) NPT for water motor alarm

Viking drain check valve

Alarm Connections

Deluge Systems

Alarm test connections & supply pressure connections

Water supply pressure gauge

Alarm test valve normally closed

Deluge Systems

To open drain cup

Priming pressure gauge

To release system

Emergency release

Release connections & priming pressure gauge

Deluge SystemsDrain loop

PORV outlet (normally closed)

To open drain cup

From releasing device

RELEASE SYSTEMS

Our systems have the following types:

Hydraulic release deluge system (Manual)

Electric release deluge system

Deluge valves are held shut by their release system. Because of this, deluge systems are normally defined by their release system.

HYDRAULIC RELEASE SYSTEMS

Hydraulic release systems are sometimes referred to as wet pilot lines. The hydraulic release line is connected to the valve trim, normally near the priming connection. Hydraulic release lines are installed in the hazard area, and are laid out like the sprinklers that protect the area.

Release Systems To hydraulic

release system

Electric Release

Electric release systems are the most prevalent type deluge release systems. Electric release offers the most flexibility, as the detection system can be configured in many ways, and the choices in release devices are greater than hydraulic or pneumatic.

Solenoid Valves

Solenoid valves are described by their position when non-powered:

1) Normally OpenWhen non-powered the solenoid valve is open

2) Normally ClosedWhen non-powered the solenoid valve is closed

Electric Release Normally Closed 24 volt DC Solenoid

Non-powered state-Solenoid is closed-Deluge ValveIs primed closed

Release System Operates-Powers open Solenoid-Relieves pressure from Priming chamber of Deluge Valve-Deluge Valve opens fully

EO10 Describe the operation of the Pre-Action system.

• The Deluge valve prevents water from entering the sprinkler piping until required.

• The primary difference between other systems is the use of Supervisory air pressure to insure piping integrity.

•If air supply leaks or is lost, an alarm will sound. Air is supplied through a regulatorat 20 psi. (15-25psi). Air alarm will activate at 3 psi. indicating a failure in piping integrity.

•Fusible element sprinkler heads open on temperature increase and deluge valve opens on receipt of detector alarm signal.

Pre-Action Systems

Are: Fixed fire protection systems with CLOSED sprinklers connected to piping pressurized with air or nitrogen (generally for supervision) with a dependable water supply controlled by a normally closed Deluge Valve activated by a release system.

Preaction Systems

Are Recommended :

For hazards where fast application of water in fire conditions is important.

Preaction Systems

Are Recommended :

To prevent water damage due to mechanical damage to system piping.

Preaction Systems

Are Recommended :

Where water entering the system piping could harm the system, such as a freezer.

PREACTION SYSTEMS

The building block of a pre-action system is the deluge valve and trim. Additions to the deluge valve and trim will be a riser check valve, an air supply, and closed head sprinkler piping.

Preaction Systems

Pre-Action ComponentsDeluge valveValve trimRiser Check valveSystem piping Air supply

Tank mounted aircompressor

Air maintenance device

Supervisory airpressure switch

Typical Air Supply for Dry pipe system

PREACTION SYSTEM TYPESInterlock and Release

NOTE: The release system must be designed to operate before the sprinkler head on the system piping. The idea behind pre-action is the “pre” part. Prior to a sprinkler activating, the deluge valve should be open or waiting to open, depending upon the interlock of the system.

OPERATION

Activation of the Release System will cause the Deluge Valve to trip open.

Water will enter the closed sprinkler piping.

When (if) a sprinkler operates,

-Water will flow from the open sprinkler immediately.

-Similar to a WET system!

Pre-action Systems Pre-Action Electric

Release

= Direction ofAir flow

LESSON OBJECTIVE

Given a maintenance situation, the Maintenance Mechanic will describe the rework of the Fire

Protection System components. Mastery will be demonstrated by obtaining a score of 80% or more on an end of course examination.

LESSON ENABLING OBJECTIVES

EO01

Describe the function of individual components in Fire Protection Systems.EO02

Describe the rework process of the Pressure Operated Relief Valve (P.O.R.V.).EO03

Describe the process of changing desiccant in the Pre Action System.EO04

Describe the rework process of the Deluge Valve.

EO01 Describe the function of individual components in Fire Protection Systems.

EO02 Describe the rework process of the Pressure Operated Relief Valve (P.O.R.V.)

EO03 Describe the process of changing desiccant in the Pre Action System.

EO04 Describe the rework process of the Deluge Valve.

EO01 Describe the function of individual components in Fire Protection

Systems.

EO02 Describe the rework process of the Pressure Operated Relief Valve (P.O.R.V.)

The P.O.R.V. is adjusted to operate when the outlet chamber pressure reaches 5 psi. and will continue to drain the upper chamber until the system is reset (inlet isolation valve is manually closed).

Deluge Systems

PORV

Inlet sensing end of PORV

To open drain cup

PORV outlet (normally closed)

Pressure Operated Relief Valve (PORV)

Deluge SystemsPORV

Clapper

Schrader valve

Diaphragm

Valve seat

inlet

From deluge outlet

Schrader valve drain

Prime line

Upper chamber drain line

Drain valve

Deluge SystemsPORV Orifice

From priming line

Priming line is pressurizing the deluge valve upper chamber and resetting the drain valve to establish the standby condition

The orifice allows water to pressurize the back side of the drain valve diaphragm

Drain valve

Deluge SystemsPORV

Diaphragm

Schrader valve

The upper chamber is pressurized and the deluge valve is now in the standby condition

Deluge Systems

Listed to 250psi

A manual or solenoid actuation has occurred and the deluge outlet chamber is filling to provide fire suppression

At least 5 psi has been applied to the schrader valve diaphragm. The diaphragm is depressing the valve and relieving water from the back side of the drain valve

Drain valve

Deluge Systems

Water pressure from the back side of the upper chamber drain valve is passing through the schrader valve

Schrader valve

Drain valve and drain line

This allows the valve to open relieving pressure from the upper chamber

This allows the drain valve to open and relieve pressure from the upper chamber. The deluge valve will now continue to provide fire suppression until manually reset

Deluge Systems

The PORV is now fully operating. It will continue until Fire Department personnel manually reset the system by closing the isolation valve

Once the deluge valve is isolated the outlet chamber pressure will drop causing the schrader valve to close. The priming line water will refill the upper chamber and pressurize the back side of the drain valve resetting the system for the standby condition

EO03 Describe the process of changing desiccant in the Pre Action System.

Dehydrator/Moisture separator and Desiccant

Note: Only Oven Dry Desiccantonce, replace after first oven dry

Changing Desiccant• Close the system air supply valve• Close the Dehydrator outlet valve• Open the drain valve• Remove the Dehydrator and replace the

desiccant• Re-install the Dehydrator • Close the drain valve• Open the system air supply and check for

leaks• Open the Dehydrator outlet valve

EO04 Describe the rework process of the Deluge Valve.

•If required maintenance on a deluge valve involves removing the trim piping, the mechanic must consider contacting the electricians for determ of the solenoid valve to prevent damage to the wiring.

Air maintenance devices are “air regulators” that once set, automatically maintain air pressure on the sprinkler system.

Air maintenance devices are used on Dry Pipe,Deluge, and Pre-action

An Air Maintenance device is a listed assembly that includes a pressure regulator, ¼” air control valves, and a ½” air bypass valve.

Air Maintenance Device

¼” air control valves

½” air bypass valve

Pressure regulator

Pressure Regulator

½” Air Supply to System

½” Bypass Shutoff Valve

¼” Isolation Valve

Air Maintenance Device components

½” From Air Compressor

(optional air pressuregage location)

Air Maintenance Device (pressure regulator)

The air maintenancedevice must be fieldadjusted to set the initialpressure setting. To adjustthe pressure, the lock nutis loosened, then the adjustment screw is either turned clockwise toincrease air pressure in the system piping or counterclockwise to lower air pressurein the system piping.


The air pressure setting is checked by reducing the air pressure slightly belowthe desired setting, thenallow the air maintenancedevice to open and pressurize the system piping to set pressure. Air pressure can be reduced on the systempiping by opening the priming water level valve.


Ball checkSchrader valve

Outlet

Incoming air

DiaphragmSpringThe spring pressure pressesdown on the diaphragm, whichallows the Schrader valve to open.Air pressure passes through theSchrader valve to the outlet of the air maintenance device.


After the air pressure reachesthe pre-set spring pressure, the diaphragm is lifted up fromthe stem of the Schrader valve.Once the stem of the SchraderValve is lifted, the valvecloses and stops the flow ofair through the regulator.

Dry Barrel Sprinkler

Upright Sprinkler

Horizontal SidewallSprinkler

Sprinkler types

MATERIALS OF CONSTRUCTION Viking Sprinklers utilize a low zinc

content brass alloy. This reduces the probability ofde-zincafication. De-zincification is where the zinc is leached from the brass casting due to a chemical reaction between the water supply, or the piping materials, and the zinc content of the brass casting. This reaction often makes the sprinkler appear that it is weeping, or corroding. There is a new UL test for dezincification that is now in effect for all sprinkler manufacturers. Viking sprinklers also utilize a metal to metal sealing mechanism in the water wayof the sprinkler. The bellville spring seals the sprinkler as well as accepts the load of the bulb against the pip cap.

Viking bulb sprinklers utilize a high strength bulb to ensure that the sprinkler is more rugged.

Belleville Spring

Viking Corporation- Confidential

When the glass bulb reaches its operating temperature, the bulb shatters. The belleville spring propels the pip-cap assembly out of the waterway.

Belleville Spring

Nickel AlloyTeflon Coated

–(both sides)Does NOT require water pressure to clear the waterway!

Viking Corporation- Confidential

Viking Brass Upright Sprinkler

Viking Fixed Temperature

Release

TEMPERATURE RATINGSFOR GLASS BULB HEADS

• ORDINARY: ORANGE OR RED• INTERMEDIATE: YELLOW OR GREEN• HIGH: BLUE• EXTRA HIGH: MAUVE• ULTRA HIGH: BLACK

OrdinaryIntermediateHighUltraHigh

Orange:135 oF (57º C )

Red: 155 oF (68 oC)

Yellow: 175 oF (79 oC)

Green: 200 oF (93 oC)

Blue: 286o F (141 oC)

Mauve: 360o F (182 oC)

EXAMPLES OF COLOR CODING FOR GLASS BULB SPRINKLERS

• Proper Care and Handling:– Sprinklers must be stored in a cool, dry place in their

original shipping container• To prevent heating• To prevent inadvertent chipping or cracking of

bulbs

Importance of Care and Handling

EO05 Describe the rework process for the alarm check valve

EO05 Describe the rework process for the alarm check valve

Valve Body

Cotter Pin

Slotted hex nut

Washer

Clapper Arm

Clapper Rubber

Clapper arm shaft, seat

Clamp Plate

SS ScrewClapperBody insert MODEL F-1Alarm Check Valve

Handhole Cover

Cover Gasket

Hex head capscrew

Auxiliary Valve Cap

Cup Point screw [not shown] & spring

Nylon Ball [not shown]

Auxiliary Valve Sleeve

Auxiliary Valve Clapper

Auxiliary Valve Seat

O-Ring

Lockscrew

Auxiliary Valve Cap

Socket Setscrew

Aux Valve Sleeve

LESSON OBJECTIVE

When presented with training aids or illustrations, the Fire Protection Mechanic will, describe valve: terms, function, components, inspection IAW Manufacturer

Technical Manual and Plant procedures, as demonstrated by scoring 80% or more on a written

examination.

LESSON ENABLING OBJECTIVES

EO01 State the (5) principle functions of valves

EO02 Identify the components and their function on a gate valve

EO03 Identify the pre-requisite prior to valve rework

EO04 State the steps to perform an external valve inspection

EO05 Identify the list of terms associated with various valves

EO1 State the (5) principles functions of valves.

Starting and stopping flow is the function of most valves. Gate Valves are the type best suited for this purpose. When open, gate Valves permit fluid to move in a straight line through the Valve with minimum turbulence to restrict flow or lose pressure.

1 Starting & Stopping

Regulating or throttling flow is done most efficiently with Globe Valves. The Disc construction of a globe valve permits closer regulation.

2 Regulating or Throttling Flow

3 Preventing Back Flow

Check Valves perform the single function of preventing flow in one direction. Positive flow keeps these valves open, and reverse flow closes the check automatically.

4 Regulating Pressure

Pressure regulators are used in lines where it is necessary to reduce incoming pressure to the required service pressure. They not only reduce pressure, but maintain it at the required point. Fluctuations in inlet pressure to a regulator do not affect the outlet pressure.

PAVEMENT NARROWS

5 Relieving Pressure

Boilers and other equipment subject to damage from excessive pressure are equipment with Safety or Relief Valves. They are usually spring loaded valves which open automatically when pressure exceeds a set limit.

Exit

EO2 Identify the Components and their function on a Gate Valve

Valve Components

The area where disc/wedge closes on the valve body to stop or reduce

flow.

Directs flow, and attachment component to system

Provides a seal between the stem and bonnet. Keeps pressure off packing when valve is open.

Body to bonnet seal.

Upper part of valve. Support for, yoke actuator, handwheel, etc..

BackseatGasket

Bonnet

Body

Seat

Valve Components

Wedge/Disc

Component part of the valve that opens or closes against the seat to start or stop flow.

Transfer motion of Handwheel to the disc.Attached to disc by: Split Joint

ThreadedOne piecePins/cotter keys.

Stem

HandwheelControls the position of the disc.

Valve Components

Support element connection between bonnet and handwheel.

Yoke bushing or stem nut

Yoke

Valve Components

Seal between the stuffing box and stem.

The location for packing to be

placed.

Compresses packing..

Gland Flange is attached to the bonnet to compress the packing.

Stuffing Box

Gland / Gland follower

Gland FlangePacking

Valve Components

EO3 Identify the pre-requisite prior to valve rework

EO4 State the steps to perform an external valve inspection

PurposeConfirm identified external problems.

Identify any new problems

Evaluate resources needed.

Checklist

Stem Severe nicks gouges

Body/Bonnet Joint. Sign of leakage

Packing Gland Sign of leakage, missing gland nuts, stuffing box engagement

Nuts/Stud. Proper thread engagement, missing tightness

Handwheel Bent Broken

Reach-Rod (If Applicable) Hard/Stiff Operation, Loose/Sheared Roll Pins,

Misalignment

Reach-Rod Problems and Solutions

• Problems with valve reach rods is an industry wide problem.

• Roll pins back out and shear causing valve misalignment or failure to operate

• A generic problem was recently identified at PV – Reach rod universal joints were not properly installed

• Misaligned universal joints can cause increased applied torque required to operate valve

Universal Joint Alignment

What Should I Check When Doing a PM on a Reach Rod

• Check to see if all roll pins are firmly in place• Check to see if the universal joints are loose or

tight• Check for any abnormal wear• Check the universal joint alignment on the vertical

and horizontal drive components. Note any misalignment.

• Grease all lube fittings

Corrective Action

• Do we need to “fix” all misaligned universal joints?– If there is no angle between the drive shaft,

connecting shaft and driven shaft then the misalignment is acceptable.

– Figures 3-1 through 3-3 of VTD-R397-00001 show “Acceptable Regions” and “Unacceptable Regions” of UJ misalignment as a function of in-plane drive angle for three valve size ranges.

VTD-R397-00001

“fix” (Cont)

– If a reach rod assembly is measured (in-plane drive angle and UJ misalignment) and is found to be in the “Acceptable Region”, then no repairs are necessary to the reach rod assembly. However, if a reach rod assembly is measured and is found to be in the “Unacceptable Region”, then the reach rod assembly must be repaired so that there is zero UJ misalignment.

“fix” (Cont)

– Reach rods that experience roll pin failures or have experienced past roll pin failures are considered “Unacceptable” and must be repaired so that there is zero UJ misalignment. Roll pin retaining wires shall be installed in all exposed roll pins whenever UJ misalignment is repaired.

Maximum Angles [per VTD]

E05 Identify the list of terms associated with various valves.

Accumulation Accumulator

Actuator Angle Valve

ANSI ASME

ASTM Backpressure

Ball Valve Bellows Seal

Blowdown Blueing

Actuator The part of a regulating

valve that applies the force to open or close the valve.




ANSI ASME

ASTM Backpressure


Blowdown Blueing

Angle Valve A type of

globe valve in which the inlet and outlet are at right angles to each other.




ANSI ASME

ASTM Back pressure


Blowdown Blueing

Ball Valve A type of plug

valve having a spherical disc.




ANSI ASME

ASTM Back pressure


Blowdown Blueing Blueing

A method of checking surface contact between mating surfaces; blueing shows the amount of disc/seat contact, and whether or not contact is continuous.


Bonnet Bridge wall marking

Butterfly Valve Cavitation

Check Valve CWP

Deformation Diaphragm Valve

Disc Diaphragm Actuator

Disc Holder Elongation

Bonnet With the body, the

upper pressure boundary of the valve, often containing the valve stem and packing.




Check Valve CWP




Bridge wall marking

Symbol on body of valve showing the relationship of the disc to the inlet and outlet ports to identify direction of flow




Check Valve CWP




Butterfly Valve A quarter - turn

valve having a plate like disc which stops flow by the outside area of the disc sealing against the inside of the body.




Check Valve CWP




Cavitation The formation and subsequent collapse of air or steam bubbles in a system, which can cause deterioration of surrounding metal.

E05 Identify the list of terms associated with various valves.Bonnet Bridge wall marking


Check Valve CWP




Check Valve A valve

that allows flow in one direction only.

E05 Identify the list of terms associated with various valves.Bonnet Bridge wall marking


Check Valve CWP




CWP Cold working pressure




Check Valve CWP




Diaphragm Valve A valve that utilizes a flexible material to

separate the valve bonnet from the system fluid and may also use the flexible material to control flow through the valve.




Check Valve CWP




Disc Part of a valve that

mates with the seat in the body to control the flow of system fluid.

E05 Identify the list of terms associated with various valves.Flanged Bonnet Gasket

Gate Valve Globe Valve

Gland Gland Follower

Hanger hanger Pin

Identification plate Junk Ring

Lantern Ring. Lapping

Flanged Bonnet A valve bonnet which has

a flange through which bolts or studs connect it to a mating flange on the valve body.


Flanged Bonnet Gasket



Hanger hanger Pin



Gasket A material used for

sealing a mechanical joint in a piping system.




Hanger hanger Pin



Gate valve

A valve having a straight - through flow design which exhibit very little resistance to flow; normally used for open / shut applications.





Hanger hanger Pin



Globe valve

A valve in which flow is primarily parallel to the axis of the stem as it goes past the seat.




Hanger hanger Pin



Gland follower

Closure device for a stuffing box (also packing follower).




Hanger Hanger Pin



Identification Plate A metal plate or disc located

on a valve, showing the manufacturer’s name and design information for the valve.




Hanger Hanger Pin



Junk Ring A ring contained in the bottom

of packing chamber to level out the bottom and/or maintain a close diametrical clearance to eliminate the extrusion of packing.





Hanger Hanger Pin



Lantern Ring A ring contained in

a valve packing chamber that allows escaping system fluid to be vented.




Hanger Hanger Pin



Lapping The removal of

mating surface defects using an abrasive compound.


Male & Female Joint Bonnet

Lifting Device Nozzle

Packing Packing Chamber

Packing Gland Plug valve

Pressure Relief Valve

Pressure-Sealed Bonnet

Pressure-Seal Bonnet

A valve bonnet which seals tighter as system pressure increases.


Relief Valve Safety/Relief valve

Safety Valve Seat

Simmer Spindle

Stop Check Valve Tensile strength

Tension Throttling

Torque Valve Body

Seat The part of a valve against which the disc presses to stop flow through the valve.

E05 Identify the list of terms associated with various valves.Relief Valve Safety/Relief valve

Safety Valve Seat

Simmer Spindle


Tension Throttling

Torque Valve Body

Simmer A term used to

describe the escape of a system fluid through a pressure relief valve prior to valve opening; simmer occurs when system pressure just reaches valve set-point pressure prior to valve opening



Safety Valve Seat

Simmer Spindle


Tension Throttling

Torque Valve Body

Stop Check Valve A valve that will allow flow in

one direction only or can be manually closed to stop all flow through it.



Safety Valve Seat

Simmer Spindle


Tension Throttling

Torque Valve Body

Throttling The regulation of

flow through a valve.



Safety Valve Seat

Simmer Spindle


Tension Throttling

Torque Valve Body Torque A twisting force

used to apply a clamping force to mechanical joint.



Safety Valve Seat

Simmer Spindle


Tension Throttling

Torque Valve Body

Valve Body The part of a valve

containing the passages for fluid flow, valve seat, and inlet and outlet connections.


Valve Stem Valve Trim

Warn Wedge

Wiper Ring W.O.G.

W.S.P. Yield Strength

Yoke Bushing

Valve Stem The part of a valve that

raises, lowers, or turns the valve disc.



Warn Wedge

Wiper Ring W.O.G.


Yoke Bushing

Valve Trim The internal components

of a valve which are exposed to the flowing fluid.



Warn Wedge

Wiper Ring W.O.G.


Yoke Bushing

Wedge A term for the disc in a gate valve.



Warn Wedge

Wiper Ring W.O.G.


Yoke Bushing

Wiper Ring

The upper / or lower rings of valve packing, which clean the stem during stem movement.



Warn Wedge

Wiper Ring W.O.G.


Yoke Bushing

W.O.G. Water, Oil, Gas.



Warn Wedge

Wiper Ring W.O.G.


Yoke Bushing

W.S.P. Working steam pressure.



Warn Wedge

Wiper Ring W.O.G.


Yoke Bushing Yoke Bushing

The threaded bearing between the valve stem and the Yoke.

acads (08-006) covered keywords description supporting material

Documents

carbon dioxide system

halon system

material slide

protection system components

deluge system

safety precautions

plant status slide

fp system actuation