what is difference between ball valves and butterfly valve - yahoo! answers

7/30/2019 What is Difference Between Ball Valves and Butterfly Valve - Yahoo! Answers

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What is difference between ball valves and butterfly valve?

Generally used in piping.7 years ago ( 2006-07-05 00:19:39 ) Report Abuse

kdg

Best Answer - Chosen by Voters

1. Ball valves are generally more expensive than butterfly valves.

2. Ball valves use a face seal, butterfly valves (usually) use an edge seal.

3. Ball valves can be rated up to Class 2500 (42.5MPa), butterfly valves are rarely used above Class 150 (2MPa).

4. Ball valves can seal on two faces and can be double block and bleed for positive bubble-tight sealing, butterfly valveshave a single seal and can never be assumed to be bubble-tight.

7 years ago ( 2006-07-05 02:00:34 ) Report Abuse

33%3 Votes

Chris H

do the math


0%0 Votes

david kb24 #1

The working mechanism is true to description. In the ball valve, it is an actual ball-shaped hunk of material that moves upand down in the valve seat to close and open the flow. In the butterfly valve, you have a disc-shaped piece of metal, that

can turn on a central axis doing same.


22%2 Votes

ladybuge...

Like the ladybug said.....I might add ball valves are far superior too!


11%1 Vote

Dr. HOUSE

ball valv's rotating part lookes a ball with a hole in it and a butterfly valv's rotating part looks like a plate (no hole)


0%0 Votes

Terry

A ball valve is a sphere with a hole through it attached to the handle of the valve. When the hole lines up with the

inlet/outlet the fluid flows; when the handle turns the hole 90 degrees to the inlet/outlet, the flow stops. The butterfly, orgated, valve is a round disk attached to the handle. When the disk is turned narrow to the inlet/outlet, flow occurs andstops when the disk is turned across the opening.

druid

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A ball valve has a ball with a hole drilled through it when you turn the handle you line the hole up inside the valve to allow

fluid to flow turn the handle the other way the ball will block the fluid passage . A butterfly valve has a plate attached tothe handle when you turn the handle you spin the plate on its axes and it blocks fluid flow!


0%0 Votes

Andrew L

HiBall valves have a ball shaped rotating part with a hole in it which by turning that part the liquid flow rate could be set and

it is available in severalconfigurationsButterfly valve has a big flat circular plate as rotating part and just uses for on and off flows and can not be used toadjust liquid flow rate

Another difference is that ball valves could be mounted with controllers and actuators to form controll valves ,and theyare using a lot in process industeries.

Butterfly valves could not be on high pressure streams which is no limitation for ball valves

Source(s):

I can send u some drawings if u want


0%0 Votes

platinum...

Ball valves= Shuts down by screwing system

Betterfly valve= Shuts down by wing systemBoth works for same purpose they differ for their efficiency only..


0%0 Votes

Mike

The general description of the ball and butterfly valve in the answers so far are pretty accurate.

There are some errors or omissions.

Butterfly valves can be found for high pressures. I don't no the current limit but I am sure they can be found for pressuresof up to 1000 psi.

Unless specifically designed, neither is intended to be used for throttling or control service. They are primarily on/offvalves.

They can be found in a multitude of materials with many different types of seats and seat materials.

Either can be equipped with an actuator for automated service.


11%1 Vote

oil field trash

Butterfly Valve: a piece that rotates in the pipe 360 degreesBall Valve- a (circular) plate that goes up and down

7 years ago ( 2006-07-11 14:05:14 ) Report AbuseSprinkle...



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08/25/20

what is difference between ball valves and butterfly valve - yahoo! answers

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