• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/70

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

70 Cards in this Set

  • Front
  • Back

What is a check valve used for?

To prevent backflow or reversal of fluid in the pipe

Which valve is beat suited for fluid throttling?

Globe Valves

3 main categories of check valves. From below which is not a category of check valves?

Swing Check


Sliding Check


Lift Check


Non - slam check

What is the name of the valve that is somewhat similar to the gate valve except has a disc rotates in the bore of the body?

A butterfly valve

What kind of flow is required when incorporating the use of a swing check valve?

High velocity flow to maintain the disc in full open position

A ball valve only requires a _________ degree turn of the handle to fully open or close to the valve?

90°

What does WSP mean on a valve?


What does WSP mean on a valve?

Working Steam Pressure

What can a slight open gate valve cause?

High Velocity flow through the valve

A butterfly valve creates

Low restriction in flow

The Y pattern globe valve is installed where there is a possibility of ________ being deposited into the line upstream of the valve?

Sediment

A one piece ball ball is?

Not serviceable

What is an actuator

A device that is connected to the valve bonnet/stem that allows the valve to be remotely activated

Which valve has a pilot gas connection built into the body?

Firing valve

According to the ILM's which globe valve has slightly less restriction than the straight globe?

Angle globe valve

Which check valve was recently added in our industry?

Non-slam check valve

Which check valve can be installed in both horizontal and vertical positions?

A swing check

Gate valves are not designed for throttling?

True


False

Globe and check valves have what type of seat?

Downstream side

What type of valve is installed on a straight run of pipe where pressure lose must be kept to a minimum or where there is a possibility of sediment being deposited in the line upstream of the valve?

Y pattern

1/4 to 1/2 psi

According to the ILM's which of the following is not a main design and flow pattern of a glove valve?

Y pattern


Offset pattern


Angle pattern


Straight pattern

Which style of valve incorporates a replacement disk and seat?

A globe valve

What Does WOG mean

Water Oil Gas pressure

Valves used as curb cocks are typically made of what material?

Bronze

What type of material is the "ball" on the ball valve made of?

Carbon steel or Stainless steel

What type of material is a gas valve typically made of?

Brass

What type of valves are best suited for non- throttled laminar flow?

Gate and Ball valves

How many change of directions on fully open globe valve?

4 90° turns

What location should a check valve be installed st the end of a water service pipe and what material is it?

Cold water line, on plastic pipe

What type of removal device should be incorporated upstream of a pressure reducing valve?

A strainer

Which type of valve can be operated in either normally open or closed position?

Solenoid Valve

Pressure reducing valve

What is the movable plate inside a butterfly valve body that controls the flow the the valve?

A valve disc

What is special about pet cocks?

One end is threaded and the other end is for a hose

What is an advantage of a butterfly valve?

It can be installed in areas with limited head room

A vertical lift check

A pressure reducing valve will reduce pressure in a piping system. What other function does it have?

Regulates pressure

What style of valve is a gas cock?

A plug valve

What style of valve is best used for fine throttling?

Needle valve

What style of valve is best suited for 90°bends

An angle pattern globe valve

Diaphragm Valve

A lift check valve is typically installed in what position?

Upright on horizontal piping

What position must a ball valve be installed

Ball valves are permitted to be installed in any position

What is a common result of damage to a valve seat when the valve is permitted to leak ever so slightly over a long period of time?

Wire Draw

What is commen result of damage to the valve seat when a disc has deteriorated to a point where there is metal on metal contact?

Galling

Needle valve

When a spring check valve is packaged and shipped how does it come.

The normally closed position

What are two variations in stem operation used on valves?

Rising and non rising

What type of valve is used when hot tapping into water mains?

A corporation stop

Which is the most common design of a valve bonnet used on applications where valve servicing is frequent?

Bolted bonnet

8 types of valves

Plug, gate, globe, ball, butterfly, check, diaphragm, relief

10 kinds of end connections used on valves

Threaded, welded, flanged, compression, flared, solder, hub, union, bolted, clip

SS?

Stainless steel

PSIG?

Pounds per square inch

SP?

Steam pressure

MI?

Malleable Iron

4 types of gate valves

Solid wedge disc, flexible wedge disc, split wedge disc, and double disc

3 types of globe valves

Straight pattern, angle pattern and y pattern

What is the plug type globe valve ideal for?

Very minute throttling because of the wide surface of the contact on the disc and seat is likely to erode or cause wire drawing

What does the spherical ball of the ball valve seats made of?

Teflon

Where should a square headed steam cock valve not be used?

Should not be used on gas piping systems

What's good about the diaphragm design?

The design provides easy maintenance and repair as the valves can be replaced without disturbing the piping line

What type of valve?

Swing Check

What type of valve?

Globe Y pattern

What type is the top valve?

Angle globe valve

What type of valve?

Globe straight or Lift Check horizontal

What type of valve?

Ball valve

3 types of bonnet valves?

Screwed in bonnet, screwed union bonnet, bolted bonnets

What is the knife gate valve good for?

The gate has a sharp edge on the bottom to shear entrained solids or to separate slurries

What is the rising stem used with?

OS&Y (outside screw and yoke)