4-1 Installed Gain as a Valve Sizing Criteria R4A (1)

8/16/2019 4-1 Installed Gain as a Valve Sizing Criteria R4A (1)

1/52

Installed Gain as aControl Valve Sizing

Criteria

Jon Monsen, Ph.D., P.E.


2/52

Control Valve Characteristics

• Inherent

• Installed

• Inherent

• Installed

F L O W

C A P A C I T Y , C V

VALVE TRAVEL


3/52

F L O W

C A P A C I T Y , C V

VALVE TRAVEL

FLOW

METER

P2P1

P

What o! need to

re"e"#er a#o!t the

$nherent %hara%ter$st$%&

1. It $s the relat$onsh$'#et(een )al)e o'en$n*

and +lo( %a'a%$t CV- o+

the )al)e (h$le the

'ress!re dro' $s held

%onstant. o sste"

e++e%ts.-2. It $s the %hara%ter$st$%

that $s '!#l$shed # the

"an!+a%t!rer.

Inherent Characteristic


4/52

VALVE TRAVEL

PERCET OF RATED TRAVEL-

/0

10

20

0 1000 0 30

40

/0

50 60

CV $s l$near ($th

)al)e tra)el.

10 20 40

L$near

0

0

30

50

60

100

F L O W

C P

A C I T Y ,

C V

What o! need to

re"e"#er a#o!t the l$near

%hara%ter$st$%&

1. Its *ra'h $s a stra$*ht

l$ne.

2. It $s onl !sed a#o!t

107 o+ the t$"e.



5/52

E8!al %han*es $n

Val)e Pos$t$on

'rod!%e e8!al'er%enta*e

%han*es $n +lo(

%a'a%$t.

What o! need to

re"e"#er a#o!t the e8!al

'er%enta*e %hara%ter$st$%&

1. The sha'e o+ the *ra'h

2. It $s !sed a#o!t 607 o+the t$"e.


VALVE TRAVEL

PERCET OF RATED TRAVEL-

F L O W

C P

A C I T Y ,

C V

/0

10

20

0 1000 0 30

40

/0

50 6010 20 40

0

0

30

50

60

100

E8!al Per%enta*e

97-

:10 9 07

:22. 9 07

:1 9 07

/

3.


6/52

Installed Characteristic

0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

250; 1.< '$'e

0 0

00 0 *'"


7/52

0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

PFLOW *'"- 10PIPE LO== 1

VALVE P /6

Press!re

so!r%e

0 's$*

1 /6

250; 1.< '$'e0/6

10 *'"

Crane

Te%hn$%al Pa'er /10

16/2-

(((.t'/10.%o"



8/52

0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

4. /.

250; 1.< '$'e

FLOW *'"- 10 20

PIPE LO== 1 4.

VALVE P /6 /.

/. 020 *'"

Crane

Te%hn$%al Pa'er /10

16/2-

(((.t'/10.%o"



9/52


0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

3. /2.

/2.250; 1.< '$'e

FLOW *'"- 10 20 40

PIPE LO== 1 4. 3.

VALVE P /6 /. /2.

040 *'"

CraneTe%hn$%al Pa'er /10

16/2-

(((.t'/10.%o"


10/52


0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

14 43

43250; 1.< '$'e

FLOW *'"- 10 20 40 /0

PIPE LO== 1 4. 3. 14

VALVE P /6 /. /2. 43

0/0 *'"


16/2-

(((.t'/10.%o"


11/52


0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

20 40

40250; 1.< '$'e

FLOW *'"- 10 20 40 /0 0

PIPE LO== 1 4. 3. 14 20

VALVE P /6 /. /2. 43 40

00 *'"


16/2-

(((.t'/10.%o"


12/52


0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

25 22

22250; 1.< '$'e

FLOW *'"- 10 20 40 /0 0 0

PIPE LO== 1 4. 3. 14 20 25

VALVE P /6 /. /2. 43 40 22

00 *'"


16/2-

(((.t'/10.%o"


13/52


0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

25 22

22250; 1.< '$'e

FLOW *'"- 10 20 40 /0 0 0

PIPE LO== 1 4. 3. 14 20 25

VALVE P /6 /. /2. 43 40 22

00 *'"


16/2-

(((.t'/10.%o"


14/52


F L O W

VALVE TRAVEL

9 7

V A L V E

Press!re

so!r%e

0 's$*

R!le o+ Th!"#&

Lots o+ '$'e, !se E8!al Per%enta*e )al)e

A ' '

r o > .

L $ n

e a r $ n s

t a l l e

d

250; 1.< '$'e

0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P


15/52

VALVE TRAVEL0

10

20

30

40

50

0 1 0

2 0

3 0

4 0

5 0

6 0

FLOW

V A L V E

P

Press!re

so!r%e

0 's$*

2.5; 1.< '$'e

L $ n e a r

$ n h e

r e n t

L $ n e

a r $ n s t a l l e

d

0.28 psi drop @ 60 gpm

R!le o+ Th!"#&

Ver l$ttle '$'e, !se L$near )al)e

49.72


F L O W


16/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

Val)e Tra)el, h

?a$n 9 O!t'!t @ In'!t

Installed Characteristic and Gain

Installed Chara%ter$st$%

F l o ( , 8


17/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h



Val)e Tra)el, h

F l o ( , 8


18/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8


19/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8

I ll d Ch i i d G i


20/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8

I t ll d Ch t i ti d G i


21/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



22/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE


8 9 h ?a$n


Val)e Tra)el, h

F l o ( , 8



23/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

1%

1 / 4 %

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE


8 9 h ?a$n


Val)e Tra)el, h

F l o ( , 8



24/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

1%

1 / 4 %

4 %

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h 9 =LOPE


8 9 h ?a$n


Val)e Tra)el, h

F l o ( , 8



25/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



26/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



27/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



28/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



29/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



30/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8



31/52

I n s t a

l l e d ? a $ n

1.0

2.0

3.0

4.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 d 8 @ d h 9 =LOPE



Val)e Tra)el, h

F l o ( , 8

Installed Gain Recommendations


32/52

W$th$n the s'e%$+$ed %ontrol ran*e&

1. ?a$n≥

0.

2. ?a$n ≤ 4.04. ?a$n "a>- @ ?a$n "$n- ≤ 2.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h

8 9 h ?a$n


I n

s t a l l e d ? a $ n3.0

2.0

4.0

1.0

8 "$n 8 "a>Flo(



33/52


1. ?a$n≥

0.

2. ?a$n ≤ 4.04. ?a$n "a>- @ ?a$n "$n- ≤ 2.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h

8 9 h ?a$n


Loop Tuned here

Data ourtes! o" #$perTune% &n.

=P

PV

Lar*e *a$n %han*e&

Can;t "a$nta$n *ood %ontrol ($th sta#$l$tthro!*ho!t +lo( ran*e.

The B!nt!na#le< loo'

I n

s t a l l e d ? a $ n3.0

2.0

4.0

1.0

8 "$n 8 "a>Flo(



34/52

I n

s t a l l e d ? a $ n3.0

2.0

4.0

1.0

8 "$n 8 "a>


1. ?a$n≥

0.

2. ?a$n ≤ 4.04. ?a$n "a>- @ ?a$n "$n- ≤ 2.0

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h

8 9 h ?a$n


Flo(

Loop Tuned here

=P

PV

Data ourtes! o" #$perTune% &n.

="all *a$n %han*e&

?ood %ontrol ($th sta#$l$t thro!*ho!t +lo(ran*e.



35/52

I n

s t a l l e d ? a $ n3.0

2.0

4.0

1.0

8 "a>8 "$n


1. ?a$n≥

0.

2. ?a$n ≤ 4.04. ?a$n "a>- @ ?a$n "$n- ≤ 2.0

/. As %onstant as 'oss$#le

. As %lose to 1.0 as 'oss$#le


Flo(

?a$n 9 O!t'!t @ In'!t

?a$n 9 8 @ h

8 9 h ?a$n

I n

s t a l l e d ? a $ n3.0

2.0

4.0

1.0

8 "$n 8 "a>Flo(

Software Graphs Installed Characteristic & Gain


36/52

C )

Val)e Tra)el

A%t!al $nherent +lo( %hara%ter$st$% A%t!al sste" %hara%ter$st$%Flo(, *'"

P r e s s ! r e , ' s $ *

42 20

P1 9 /2

P1 9 42

P2 9 10 P2 9 12

2

P1 9 4

P2 9 11

'in(orm

'a$

0

10

20

40

/0

0

0 100 200 400 /00 00 00 300 500

Software Graphs Installed Characteristic & Gain

)" *766

Sizing Example


37/52

< =%h. /0

50;E8!$). '$'e +$tt$n*s-

240;

30°F

Water

10P2P1PP

FC

*+ &nherentharateristi

Flo(*'"

PP's$*

P$'eLoss!'-

P1's$*

P$'eLoss

do(n-

P2's$* ∆P

50 /2 0.1 /2 0.0 10 42

0 43 .0 42 2.00 12 20

0

10

20

40

/0

0

0 100 200 400 /00 00 00 300 500

Flo(, *'"

P r e s s ! r e , ' s $ *

42 20

P1 9 /2

P1 9 42

P2 9 10 P2 9 12

Sizing Example

Cv Q G

P =

∆

Sizing Example


38/52

Sizing Example

Sizing Example


39/52

≤ 85 d,- "or 6≤ 32.8 "ps

∆p / ∆pT

Sizing Example

Sizing Example


40/52

≤ 80 d,- "or 3≤ 32.8 "ps

Sizing Example

∆p / ∆pT

Sizing Example


41/52

6” 3”

8 0 8 0 5 5

0

5 5 0

Sizing Example

Sizing Example


42/52

6” 3”

8 0 8 0 5 5

0

5 5 0 6”

3”

8 0

5 5 0

8 "a>8 "$n

I n s t a l l e d ? a $ n

3

2

4

1

8 "$n 8 "a>


3

2

4

1


1. ?a$n ≥ 0.

2. ?a$n ≤ 4.0

4. ?a$n "a>- @ ?a$n "$n- ≤ 2.0



Sizing Example

4”

Selecting the Right Pump


43/52

What $s the optimum control valve

pressure drop to des$*n $nto a sste" to

ens!re ade8!ate %ontrol (h$le a)o$d$n*

the !se o+ e>%ess$)e '!"'$n* 'o(er




44/52

TC

10

1

ump head

droops 5 psi

"rom 100 gpm

to 600 gpm

ressure

osses

@600 gpm

6 h 40

70 ater

0

10

2040

/0

0

0

30

50

0 100 200 400 /00 00 00

P210

45

535

P1 ump - 17 hp35 2050

P1 ump , 23 hp60

50

30

-t norma "o 400 gpm

P1 P2

3565

P1 ump : 29 hp75

65


;a;e harateristi

& n h

e r r

e n t

& n s t

a 1 1 e

d

'in. (orm. 'a$.



45/52


46/52



47/52

6



48/52

3



49/52

3



50/52

5 psi, 17 hp

20 psi, 23 hp

35 psi, 29 hp

8 "a>8 "$n


3

2

4

1

8 "$n 8 "a>


3

2

4

1

W$th$n the s'e%$+$ed %ontrol ran*e&1. ?a$n

≥

0.

2. ?a$n ≤ 4.0

4. ?a$n "a>- @ ?a$n "$n- ≤ 2.0



3

6

g g p



51/52

20 psi, 23 hp

35 psi, 29 hp

3

Ma>$"!" Cal%!lated =PL

To a;oid a;itation damage= T> 3 80d,-

4 T> 6 85 d,-8 T> 14 90 d,-

16 -(D = 95 d,-

g g p


52/52

han! "ou#

G"onsenHte%hn$%al%ontrols.%o"

Date post:	05-Jul-2018
Category:	Documents
Upload:	mrrogue
View:	220 times
Download:	0 times

4-1 Installed Gain as a Valve Sizing Criteria R4A (1)

Documents