Economical hot water sealing

Dynamic sealing

Abrasive sealing c o n c e p t reaches Europe For n e a r l y 2 0 v e ; a s . A m e r i t a h a s h a d t h e b e n e l i l of a s e a l i n ~ s v s l e l l i lOl- s c a l i n g I h e lllOSt a b r a s i v e p o w d e r s , p a s l e s a n d s h n r i c s . [UI'L S e a l s T e c h n o l o g y a n n o u n c e s i h a l I b i s s t a l l 1~ ~,v.'-denl h a s b e ( o m e a w d l a b l e in E~u-Ol)e. T h e MEC{) s e a l h a s l h c b e n e l i t s o[ t h e flexibility. v e r s n l i l i i y al~d c ~ s e of q u i c k (external a d j n s t t n e l l l of b r a i d e d p a c k i n g s , c,:)mbined w i t h l h e s e a l i n g l)rt)t)erlies ol ;t ('()rrc('llv i n s l a l l e d a n d m a i n t a i n e d ille('hallit?al N( ill.

"lit' ( ~)tltt'i)I ~\:~1"~oliKili~llly d e v e l o p e d to i l l c r e a s e >cni lilt' n n d ¢ f l i c i e n c v in l h e p a p e r i n d u s t r y , b~ll h a s ~,111~ (" ~,O[Ve(1 Ill,in\" I)lol_~leIll a p p l i c a t i o n s in t h e ( '1 lt'Illit'ill, PI:, St i~ z~l](l F o o d I)rocessiI~g I n d u s l r i c s . :-~tfilal)le It)l- k,c n e r t d t u ) p l i c a l i o n s s u c h a s S( l-e\v c(nwc\'(n-s, mi×cr.~, b l e n d e r s , a ~ i l a t o r s , s l i r r e r s , s l o r a g e \ ' c s ~ e i s n n d ir,)>res~si\.'e c a v i l y p u l n p s , l h e M E ( : O s e a l i> w i d e l y ~tsc, I h,r ~norc s l ) e c i a l i s l a p p l i c a t i o n s . For c x a m l ) l e , ill I{le >ll[~ar i l l d u s l r y l o t r e c e i v e r s a l l d c l ( ' v a l o r s , t']l()('()lalc p r o d u c l i o n l o t l e n l p e r e r s a l l d t ()l~ches. nlVl i~ ill," 1)olvmcr p r o c e s s l~3r e x i r n d e r l e e d s ;ill([ [r~lllSiC[ <,(T('\v-~. il is availa b i t n::~ a s l a n d a r d e a r l r i d g e i n s t a l l a l i o n , cill~er >plil ,:~ ci~dh'ss. W i l h n e w d e s i g n s or relrotit a p p l i c a l i ( ) n s , i}o p l a n ! l n o d i f i c a t i o n s a r e r e q u i r e d . C o n t a c t : FTL S e a l s T e c h n o l o g y Ltd, B r u n t c l i f f e A v e n u e , L e e d s 2 7 B u s i n e s s Park, M o r l e y , L e e d s L S 2 7 OTG, UK. Tel: + 4 4 1 1 3 2 5 2 1 0 6 1 ; Fax: + 4 4 113 252 2627.

E c o n o m i c a l hot water sealing Fhe n e e d lo s e a l h o t w a t e r w i l h i n ~ t e m l ) c r a t u r c r a n g e ,d 1 2 0 C Io 180°C c a n b e q u i t e (lelqLlalldint~ l~r a m e c h a n i c a l seal. T h e t e c h n i c a l i e q l l i r e m c n l s call lbl~111 a r r a n ~ e n l e n t t h a t ens~_lres no llliXill~ ~111(1 i1o vaporization between the seal-faces. F u r t h e r m o r e t h e p o s s i b i l i t y of d~T l-tnlllin~ a n d tile i n l r u s i o n of s o l i d s b e t w e e n l h e f a c e s m l l s l b c eliminated. Demineralized and olher , oiMitioned water has even less lubricity than regular waler. Rust. silicales, residue and/or additives and ,)lher solids pul l u r t h e r s t r a i n u p o n l h e seal, C o n v e n l i o n a l a r r a n g e m e n t s lot se~tlin~ of s u c h a p p l i c a t i o n s u s u a l l y h a v e p u m p s will- a c o o l i n ~ c h a m b e r or e x t e r n a l w a t e r c o o l i n g . A s i d e f r o m l h e p r o b l e m of c h a l k i n g - u p (layers t~l c h a l k i s o l a l i n g l h e c h a m b e r , t h u s s e v e r e l y r e d u c i n t t l h e ('()olmg ellk~ct) b o t h m e t h o d s of e x t e r n a l c o o l i n ~ a r e ; ; t i l t e r costly. Up lo I20:'C s e a l i n g of h o t wailer (~111 b e achiew~d w i l h o u l auxilim3, c o o l i n g by u s i n ~ a s u i t a b l e s i n g l e m e c h a n i c a l s e a l arid by set l i l l e - l | t) a ('ii (.i dal iotl line fi-om p u m p d i s e h a r ~ e i n t o l h c s e a l a tc~. l ' h i s c m l b e d o n e a c e o r d i n ~ l o A P I 6 1 0 P l a n 11 (n 1)v m e ; m s ol i n t e r n a l ( ' i r e u l a l i o n (API 610t:)1ml I}: I I~i~,will h e l p I() d i s s i p a l e tile f r i c t i o n a l Ileal. FOl- s e a l i n g hot w a t e r o v e r 120 C. s~ i( Ii a r r a n g e m e n t s l n a y 13ol b e stlll](;ielti 1.) ;l>Stll-C I r o u b l e - f i e e o p e r a t i o n w i t h a r e a s ( , n a b h " lilY,span. C h e l r a h a s d e v e l o p e d l h e S t y l e 2 0 S N a s :~ s~,li~ a n d e c o n o m i c a l a r r a n g e m e n t . I1 is a sillgl,', b a l m w e d m e c h a n i c a l s e a l d e s i g n e d 1(~ b e Ilol a l h ' ( ' l e d !)y solids. T h e u n i l h a s a s l a t i o n a r y d e s i g n will7 > p e c i a l s e a l l~ce ~ c o m e t r y . T h e s e a l l a c e s - s i l i c o n e cacbi(te vs. h a r d carbon a r e solid i n s e r l s . No shrun!~, i~ r i n a s a r e ~ s c d . T h e S l y l e 2 0 8 N s e a l is o p e r a , t e d m a d e a d e n d fashion with a sizeable reslriction bushing towards Ihe l ) u m p c h a m b e r . A t h e r l n o s y p l a o n c o n l a i n e r is t)laecd a b o v e l h e l ~ t n n p / s e a l s e t u p a n d c ~ m ~ e v l e d Io I h e sl uffin0, box. T h i s i n c r e a s e s l h e fluid v~lt~lm c o n s i d e r a b l y a n d h e a l d i s s i p a l i o n fr(ml t h e p i p i n g a n d c o n t a i n e r will l e a d It) a 50°,:~ d r o p i~ ~ l ) e r a l i n ~ I c m p e r a l u r e w i t h i n t h e seal are'a. Contact: Chetra GmbH Dichtungstechnik, Postfach 1 2 3 4 , D - 8 5 7 3 8 G a r c h i n g , G e r m a n y . Tel: + 4 9 8 9 3 2 9 4 6 4 0 ; Fax: + 4 9 8 9 3 2 9 4 6 4 2 0 .

Fluid regulator prolongs seal life ( : h e s i e r l o n s n e w S i n g l e F l o w l h l s l l / q u e l w h Iluid r e g u l a t o r is s p e c i a l l y d e s i g n e d lo p r o v i d e s u p e r i o r no.curacy, reliability, s t a b i l i l y a s well a s prolon~,ed s e a l liR~ in t h e m o s t d e m a n d i n ~ l]ust-mlK/qlwucldn~,( single-seal applications. S i n g l e F l o w p r e c i s e l y r e g u l a t e s a n : l m a i n l a i n s low. c o n s t a n l , a d e q u a t e l l u s h to a s i n g l e scal. k e e p i n ~

6~ealing T¢'chnoloq!t No. 4 4

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