SPRING 2013 VALVE MAGAZINE 1 t u y n a . r b e i

y

e a v , l s n a s l s i a a

t d u a m c h

i i d o n

r t o t s e e m i

e t r r r

t s u e m u s c a n

t n n y S h o c e

g m a o

i r i a

r e t o f . a s i w c a

s i

v d s e u v f s t l

i e u n D n c s t s e o a t v n s

i i a l e a e v . u a r

l s l n y a s p

c e c m t g a p MAGAZINE o v e

t y y i i

e v e o s n t t e i a

t i n c

a e r r i r x a … e m a g e v f t r a a m e s r l

E

o s n v e v

e m e p l s a c :

a e

e d i l l o a h e h v i a S u l t n r

e t

v v s T p

s i T s

a

l

e p

s e h f n : f a i

l s P a h h n

t l l l o o i Y t o i e c V 3 E

a e

p c

1 i A n h s

: C s y w 0 i o d w c t

a T n d 2 n

W N n

e n r R p m t C o g n e g r A a r p O i i m i u a e

n - E a t s

r s e i

C s s k

h

r J

h E e

e o p h e s p s f h B Y K T O W D r S A w r d t m i i E a e e U A o • • • • w S w c n K T h p e g v n s a l -

e i e s s i e , r l g s r s f y o a i l a o

t n a e e l h i

i i

a

, n l r n h f s r d c h t i w t e n a e i o

f a e

c n h

m t e e o e e g u i r a m w e e d a g s r s

i

s s

t n c e p o l

l i o s m n s l

o i x n h s

. ; I r . e h y e

m o c a s r n e n s t d s

. l l t o

s m u i , o o l n f e l i d d s o i p s s o c s a t a a o i t h e n s V t o e

n i

h t e t m a t ; w a a r c n

t r e

—

c h t e y c s a l m c i

e p e e s l c d g i l

l a a a — o i

d i

h d u p n e t o p t s i i e s t

s i e

d a e e

s r - h p c w a e w t d e

a t n n c e a n

a i s s r d r m i

c

i l r e

e l

c a u w t e o w o p , r r p e

n a h

t o i p f h h o s i o a v

r t o

r f s t n n p x p o e

t

w i

t i o s e

e e

e

v , s s R s a

e s e l o

t i s s p t d .

m u e l r v e a g d n c e l f t m s e a d e l v — h n i t e u v s a

a e l t r

c t

n n a i e d

v - c s e e i ; c r m s

i g t

r

e o v e g u e i u t p r c t r

u d s

e a i s i

c s n l d s

p e r t x t n u d e u h a n a o

s

o

i h s c

l e l r a r d q a g

g

t i o s

a

a p w e t r l ; p e l t

n a e

l d s

n a i l n m p i a h i g y s A o n r w e

p s o

o t c g a . y i i

a a e o l g e r e S n t t

t u

a

a

p E r e m g a v o h e

i

l

n s i

a y r o t K

a w l p C c c a c a a n e d

n l m

i h i

- h

I

c v e t e t a o a h

n

C l d w O o a l i m r t t

s d s p

y a r n

s s , S m s

o o A s a t a T a f

S A A a l a l

s

n c n

E l r d s o e

m i I e p r u A

o

d a

v e B b o i T s n s r

f e i i t d o t e a a R u n r e

B e o t

E P n v o u

c h g e s s h g f

d i a P a t a b e f

e e

T t a

s i O n u ,

’ s a h v v t

N

r

. n e e

R l l a g a n . a A t r t n

t m P d a a R l e s M

n e

o s

o s a

i h i O r v v f S r a e d ; o ’

v u s v d M

o f m o c t l

o c C

c c s

d i s

a I

i i r m h M V s m e a I T

n t t e e

e

e

m T g c l e 3

S s s

k a v o i t d 1 e e l Y c o p A a a a e 0 h e a B l l r n h a h y L y 2 m © P T

T o c w w c p v w p t m p a 2 VALVE MAGAZINE SPRING 2013 e s a a P p v l p c l r a f t t a b u s o t u m m r p s a a c u s s b P m r 1 f r h S b C u t b t p w a D o i e a e e l i r n h h e u u t L o i u t t r o h a e d c n r n c c a P V h i n y s r o s e P e n e r e z u n o h i v e d o a o t r r g l e s q i o m

n r r e r l i i i e i e r n n e e

d c V

d a g e D l

d

a a p e e o

e a e m v d d d i e e t e d s s s i

b t h P T P A P k u f y m p P p r y h ( d f d a m d s t l i

C

e i c r e n n a i l

r t

F

e e o i t t r

a s s s e u h x t

U p t t y c V P l P e i a

e P a g l n e m e c t e

u

i w F . e o ’

t

r e e b a ’ g g , r , a t h

s t n q a d l a s i d i

h a s l g

e p r r n c v o r D

V i c r s

m u d y V n a

e v s d c o n h m u

t n s e s l r

i o t t i a n

t i f t

d a

e e n o r

t e e r t i i W d m

D e e c n e s m e e l F i e ) a s s v e u n a t o m h h f

i e o s

t m n p c v e o p a r l l

d

i

r m t p m m o

v

a h

i

a

t

l s d

n i d l r . f a

k F m a n u o ( r l .

u e a r s p c n f p s n t i e

p f

e e

y e l s t r

a h r

f u o o l

n m o i e P a

a a g

n t o e t

e

a r e h a U f o m - l e i o e u n

m v . g n e d o l n t o d i r a o t h a i e a i i t c r

f v l n m p

f l

d V n e a e g p r

n e t e n v e a n n

n g g o e s t c c r y h u n F

i

p l t e n i n u r t y a A v b

a o s i n l i d n P e b y D d s i q n

i e d d

r i t

e o e g r m d v m o h n i l

m l

a

l a c s e c d d e s l s w

n l e f l t , e n c y i v s t e e b i p - e V l y

u r t g

t F m

i v u t o a u o t

e i s a a y t a n

k r w

a

r , e r g t f ( f

n a i e

i

s b o a

e r h

a o ) ( C a u ; i e c b

o i t b e a

t s l j

s l t r n l l r n t e h c ( n c t a S e l r

t o d l a n

y . i e d l o a i r o h l

i e n s e

e

l , s t p h t x y P h e s r

s l e e s h o n

d h y l f t l c

e a a l a A n y

l e l n t e r e r c n e e r e f

r P P e i c

r l , i

o i

y o e o t w

P o w

l e

e e n a c c

o e i n t s i n n

p

.

t w s d t t d

n s w

c j

r , m

v g 1 s

P V a a s g n d n r o r e n n u

a , ) a w e l a m 1 i n o i s t t , c

s

o

d r e

e e h e

u m m a n t , u

e t f a n l d e b t s C

, 4 a o 2 i f i a i

i o r u s

c a n c h s t i o b

e

e d l e i r d s

g e o

f c t s l

l 1 p o i d d e a t t f a n g e P

u a n

e n r

C t . h o n p a k o n o i l v c f ,

c l e

h u m a 7 t

e f o v e a t

r a n 5 x l t n l l

i

b o q

t e k p

s V i t d d P t d i c i n o r e e n y a ) a a p d r ) a u r e n e n t a

e z y o i s r

n n n

n ]

%

o

r ≤ n i u r e r i s e p D u

p n

V l a s c d

d l n

n s G s n o c l

s o i n t r n r o d n g

d e i t g m c d m 0 e

g s t

u t m a

m

a o n ,

s s t l

s d t i i g C o e F

c r f l a e . o

c p . d m h e d n s e t g

e e

r . i b n o g

p s 2 o t i t t e c e i

w c m t

f t C a c e , e a d

o m v o k r i t t a c

i x

s g n C r e

a t 5

a n t e . i y e n m t

a h h o s i v g e a N ( p a e h P i t

s

n b e v a c s

f

;

i %

n n c i d f h h y u t n l

( g t

i b p C r s P e e e m m s e t

c e l

n

i t

m t i i i y V e t l h a S y e e h e s r y

u P y b

p w e

e o n r

h

d c c n a v u i P

p

r d y o

V

o a s i u a

t

t F o c h C n a l e o

a a v a f v l p e a s i s V o i

s a e e p

o f U e o a l o g

o i h V a o

u t C o r 1 a l f

a m p

t f

t t a . r t a a s i e i t u d t n

n t l p t

C u n e [ s r e e a s

t - r v

n

l e C V

n n a r s i n l w e a u h e e b

t i t e 4 s d l i i d s e g v l N m s

a

o d i . ) g a

i r d c

a p h h , n v o r ) c a l - t

y d - s

d s d r r n

s j

e y d m b

a ,

e

a n s e e s e 2 t n s c n a v a t , l , r

i N i u e e f a g h t 6 n a s o l l i e

e

, s s g c

v s t a a 0 a o e u l

a n t , h n e i r o a c n d

t i S n o s u p t s l s a b n

o a

f

t 1

s u - d 1 g a

o a c e

c l l v i a f r a t . i h a s e s r t o i o r

c t e r f i 1 t s e s t t c o t u d u e

f

e

u r c b r o a s s e m a r h i , c y a

t d e

f h l a t f r T i ’ u m e a k o r o

a . i n a d t n l o s r t i n s o s h c n a a P n h d e n d - - t e - i - s e a - e - g s - g r t e - d c - P e - s l t t r i p e e a a d e m t t t l t t e s a h u i r h o h x n r p Ⅺ e i Ⅺ o a

n e f a p l r a

e e p e s v p , o n n s e t g t P i t i

a x i l a u n o i g u

f f , s F

r e F l i t o c n a

l l o i o l a i c e p g n d n n g s b g u u — e n n m s f a u s n u ,

a l - e p u i i

i l r s p

d

i r t t g d d s o l m r e d s e i g e i t y i e t i e

s t

g r r c u

n 2

o

1 t h h s a e e n t m a

e . n l .

m h

c

t

t t n o E o e t s T e n d n t u f t h e h l e h e

y n o s o r r

l e

t e g w e e m f a U m n

, r t d , s s g r

n

a o

m g i

p i o t t

i . f i r n V n a s a

r o s p t t

r

e o u e c

l e t a

t T d

e

e h a s p r i l s m f d r m s r h o h e a l h s u d o e d s

a n l

e a u

e e i n s a s e e t

r r s n

. i w d g r o n t x s f

i n e

e s x o

r c l h n g o i i h s s m

o a t i a p g c a c

c

o i e g a g i o r o n - m a u s t a t c

a a r m n d e p n v , h a d

i

i l

t n

d n j

p v i f t o d e r i u e

t o e c u v e s f a s s

p i l c

n

r m r o i c

a r e t e l i

d a r p a c g i i t

o a f y p e . s n . r g i t d e n i i l e

a e o r t s

n t e y

v W d r n s m e s e t d r i a - e a , e

n e o o i

m o a s e

t a n

s

h g h e c

u i t c i

n . e t f n t n c d r g t n

i i n a f e a e f o u o

t l e d e

d n

v

o f © t r e r n

d c

f c m s e

c

2

e o e

s i f

o c

t f s h 0 c w t a t c

i x f e o h 1 p o u r P e x i h o h a t

p 3 x r v r r e a e n n c

V

e n e l o p n t o V e o - n n r h a t r D a s i s a c o s n r m l m t

i i v e a F - u a d s v e u s a c

e e

r s - e M b - e - l s e a t n w u e f a e c n t u p c m c m c t e d s v a l m t D v s p t p m p c e s p p m o t i q s r l e o n h o h a a y p i c o o o a a a x d l u f i e l a o e r i v s s e a u u a o o a r g

i a s f

e a s o t l l n n n

r r r t i r 1 e n e t A f v v n l x c i m t n s b W B O e p t a a e l t . t

t c n

s s t e e s e c 8 e

o e e t e

i h

s t

e r s g t t y s s r e n i i s I m a o m d r m h

r o i , t n

m . 0

u u d d a n , .

l

n e c e a

e c c a a

i

w d w

f i o

o

p e t m a i c e e ° o t r r P p l u t

x p n n a n a g B

s

s n e h y e e e f v n n h r d t t i e l f r r F n V u t r m

u e r o g i t g

o o

l y d a c .

i a

i o e a e t i g e

e l e t ; l t

h o a

C l o n r s n t

l i

d r s v c h

t

p

l h

t e o F s

s l r a a d

p n . e n v

e a

v e p n s f o g t i

o t e i

i n s r l d i l m e h A r t t o

e d r f a a g

n

e n o , a u g a o i f

u s t 1 l a p i u o t e r

a p l c t r n

i s l i

s o t

h

d s t i i s n p u o t h r 2 4 a v l n r n h d l s r v t g a d s e

i ’ i t

e t e

a n e

e

e g

g m s e e n i e b t 2 0 i i

t t u g e n i P r s n

p c h g n

n s d , a r i o r c . e t r h e r m

g e u 0 ° t

e

o o

V

a i r t o s n m s s e

a

i i

f u t m b s e t S n

e

p ° F

m i m n t m u n n t i D l p r f d h r m s s i h s t c r n e t e e l s h g ; o u e

r F n g p p s

y

o c s e e

u F e

r

a a e t s e p x

d w e t ( e

; p p q r p C i e g e s

p e r

r o

c r

u p x t r

e d e q i F a t v v s r e l a p e u l P t i s P i

m b r e t o

o e i a r h i a m m i

e u p t c f t t e a a d s t 2 r d m r i i V p g e c P r i o r f r c h h s r t o a i . r u e a e i e m l t l u i 8

t a e o

p

C i u s a

e n v

k t r i R a u

a u t t s n r l n s r n h s o c t

n n 0

i e p

i e t

r d e

, a u e h g l s

t , f m t c r h n p y t

e g o e e a

i n s a g °

r l

s l e t u

o

s h r r e

t o

s

c a x a a i c e a

d

f c s t

s e i c

n n

t F h i

f h r

1 e s

n a n v o c p r s

b s n x t a s t y n n

h a h t e

p

d a e y e e

o a ) u e a t a m e u

( . i g

e a n s e d e r

p

a i a

s

a b .

i a i F v t r r x n

r e l r i t s m n p — l f m p c I

e w m t i n a v a n v

e b h s o e i i o e a p e

n

p s e i e s e d g l l e y s i e g t t

m c p s e a m w

f a i r

a p h i c i l

r m

i m e s c u

e

t f c d i o r e o i

n s

x e s i s n n e n p o p a s

e

e y s o m p n x s e r o s

u r n i t f s r t e g a

g

s o e l

r i c t a e m b c r i a r r s

s i o t t

m a w p n t m i x i e p i c e r

t

a t s e i s h e a t

o n a n

o c 2 e - i u i t

-

m a e o e i . n u s b e s m n e - a b n a n e i n s - f ) m s z s - r i v d r e

r d - o t . - e t g k e - - a - e n - . This article could not cover all of the plastic materials, types in thermoplastic piping as tem - PLASTICS of valves, valve options and system requirements available perature decreases. However, RESOURCES impact resistance of most plastics today. However, it illustrates just how broad the market is decreases as temperature falls, and and what promise it holds. Today, there are many plastics brittleness appears in affected piping specialty distributors and knowledgeable plastic professionals that can materials. As long as the valves and help users discover how plastic valves and piping systems can meet or adjoining piping system are undis - exceed their needs. Three of those sources are the Plastic Pipe and Fittings turbed, not jeopardized by blows or Association (www.ppfa.org), International Association of Plastic Distribu - bumping of objects, and the piping is not dropped during handling, adverse tors (www.iapd.org) and Plastic Piping Institute (www.plasticpipe.org). effects to the plastic piping are mini - mized. ufactured by several U.S. and foreign solutions, chlorinated hydrocarbons TYPES OF THERMOPLASTIC VALVES companies in sizes 1/2 inch through 6 and petroleum oils. Ball valves, check valves, butterfly inches with socket, threaded or flanged PVC and CPVC ball valves, 1/2-inch valves and diaphragm valves are avail - connections. The true union design of through 2 inches, are a viable option able in each of the different thermo - contemporary ball valves includes two for hot and cold water applications plastic materials for schedule 80 pres - nuts that screw onto the body, com - where the maximum non-shock water sure piping systems that also have a pressing elastomeric seals between the service can be as great as 250 psi at multitude of trim options and acces - body and end connectors. Some manu - 73°F. Larger ball valves, 2-1/2 inches sories. The standard ball valve is most facturers have maintained the same ball through 6 inches, will have a lower commonly found to be a true union valve laying length and nut threads for pressure rating of 150 psi at 73°F. design to facilitate valve body removal decades to allow for easy replacement Commonly used in chemical con - for maintenance with no disruption of of older valves without modification to veyance, PP and PVDF ball valves (Fig - connecting piping. Thermoplastic check the adjoining piping. ures 3 and 4), available in sizes 1/2- valves are available as ball checks, Ball valves with ethylene propylene inch through 4 inches with socket, swing checks, y-checks and cone diene monomer (EPDM) elastomeric threaded or flanged-end connections checks. Butterfly valves easily mate seals should be certified to NSF-61G for are commonly rated to a maximum with metal flanges because they con - use in potable water. Fluorocarbon non-shock water service of 150 psi at form to the bolt holes, bolt circles and (FKM) elastomeric seals can be used as ambient temperature. overall dimensions of ANSI Class 150. an alternative for systems where chem - Thermoplastic ball check valves rely The smooth inside diameter of thermo - ical compatibility is a concern. FKM on a ball with a specific gravity less plastic parts only adds to the precise also can be used in most applications than that of water, so that if pressure control of diaphragm valves. involving mineral acids, with the is lost on the upstream side, the ball Ball valves in PVC and CPVC are man - exception of hydrogen chloride, salt will sink back against the sealing sur - face. These valves can be used in the Ⅺ Figure 3. A flanged ball valve attached to a tank Ⅺ Figure 4. A ball check valve installed vertically same service as similar plastic ball valves because they do not introduce new materials to the system. Other types of check valves may include metal springs that may not last in cor - rosive environments. The plastic butterfly valve in sizes 2 inches through 24 inches is popular for larger diameter piping systems. Manu - S P

facturers of plastic butterfly valves take R I N G

2 0 1 Ⅺ Figure 5. A butterfly valve with elastomeric liner 3 V A L V E

M A G A Z I N E

3

©2013 Valve Manufacturers Association. All rights reserved. Reprinted with permission. differing approaches to the construc - Because of all the options of body and tion and sealing surfaces. Some use an diaphragm materials, this valve can be elastomeric liner (Figure 5) or O-ring, used in variety of chemical applica - while others use an elastomeric-coated tions. disc. Some make the body out of one Like with any valve, the key to actu - material, but the internal, wetted com - ating plastic valves is determining the ponents serve as the system materials, operating requirements such as pneu - meaning a polypropylene butterfly matic versus electric and DC versus AC valve body may contain an EPDM liner power. But with plastic, the designer and PVC disc or several other configura - and user also have to understand what tions with commonly found thermo - type of environment will surround the plastics and elastomeric seals. actuator. As previously mentioned, plas - Installation of a plastic butterfly tic valves are a great option for corro - valve is straightforward because these sive situations, which include externally valves are manufactured to be wafer corrosive environments. Because of style with elastomeric seals designed this, the housing material of actuators into the body. They do not require the for plastic valves is an important con - addition of a gasket. Set between two sideration. Plastic valve manufacturers mating flanges, the bolting down of a have options to meet the needs of plastic butterfly valve must be handled these corrosive environments in the with care by stepping up to the recom - form of plastic-covered actuators or mended bolt torque in three stages. This epoxy-coated metal cases. is done to ensure an even seal across Ⅺ Figure 6. A diaphragm valve As this article shows, plastic valves the surface and that no uneven mechan - today offer all sorts of options for new ical stress is applied on the valve. smooth inside walls of the thermoplas - applications and situations. VM Metal valve professionals will find tic body. Similar to the plastic ball the top works of plastic diaphragm valve, users of these valves have the TIM MORAN is the industrial plastics product man - valves with the wheel and position option to install the true union design, ager for NIBCO Inc., a manufacturer of thermo - plastic piping products (www.chemtrol.com), indicators familiar (Figure 6); however, which can be especially useful for based in Elkhart, IN. He is a member of the Water the plastic diaphragm valve can include maintenance work on the valve. Or, a Environment Federation. Reach him at some distinct advantages including the user can select flanged connections. [email protected]. 3 1 0 2

G N I R P S

E N I Z A G A M

E V L A V 4

©2013 Valve Manufacturers Association. All rights reserved. Reprinted with permission.