EQ UIPMENT N E W S

Premium Grade nary rings

ing Holder

Among the fea tures of th is p u s h e r seal are: • s t a t i o n a r y f lexible e l e m e n t

- - th is min imizes ro ta t ing c o m p o n e n t s , e l i m i n a t e s s h a f t - t o - b o x a l i g n m e n t p rob lems and leads to im- p r o v e d face t r a c k i n g a n d lower leakage.

• p r e m i u m grade carbon face -- t h i s l e a d s t o h i g h res is tance to b l i s te r ing and f r a c t u r i n g , a n d a h i g h t h e r m a l c o n d u c t i v i t y r e d u c e s t h e p o t e n t i a l for f l a s h i n g . T h e f a c e i s d e s i g n e d us ing f in i te ele- m e n t a n a l y s i s ( F E A ) to m i n i m i z e p r e s s u r e a n d t he rma l and mechan ica l dis- t o r t i on t h r o u g h the en t i re ope ra t ing p ressu re range.

• increased face pa i r lubr ica- t i o n -- f low d i s t r i b u t i o n genera tes a smal l p re s su re d r o p , c r e a t i n g a c i r c u m - f e ren t i a l f lush d i r e c t e d a t t h e f a c e s , r e d u c i n g t h e a c c u m u l a t i o n of v a p o u r s and increas ing face lubrica- tion.

• block sea t -- con tac t wi th a meta l ma t ing r ing a d a p t e r e f f e c t i v e l y r e m o v e s f a c e heat , reducing the po ten t i a l for flashing.

• user f r iendly des ign -- the re ta in ing fea ture uni t izes a s t a t i o n a r y f lex ib le e l eme n t making the seal s imple to assemble ; in add i t ion , the ca r t r i dge des ign fac i l i t a t e s easy ins ta l la t ion.

The pe r fo rmance capabi l i t i es of the Type 594 are speeds up to 25 m/s , p ressures ranging from vacuum to 34 ba r and t empera - tures from -40 to + 200 °C.

Contact: EG&G Sealol Inc, 50 Sharpe Drive Cranston RI 02920, USA. Tel: +1 401 463 8700; Fax: +1401 463 6198.

Peripheral pump range upgraded

An e x t e n d e d pe r iphe ra l p u m p range des igned for bo th OEM and general pu rpose appl ica- t i ons has been l a u n c h e d by S tua r t Turner.

T h e m o d e l s a r e m o r e compac t t han the i r predeces- sors and offer improved perfor- mance and efficiency; the 250, 330, 500 and 600 a re each avai lable in two body designs; end suc t ion (ES) or ver t ica l suc t ion (RG). The range has also been u p g r a d e d with a new t e r m i n a l box to p r o t e c t t he c a p a c i t o r a n d a r e d e s i g n e d p u m p head . A g reen m o t o r cas ing d i s t i n g u i s h e s t he up- g r a d e d range which r equ i r e s no rou t ine ma in t enance dur ing its working life.

A full range of power sup- pl ies are avai lable on all mo to r s inc luding th ree phase op t ions on model 500. Seal ma te r i a l s can be se lec ted d e p e n d e n t on the l iquid to be pumped .

Contact: Stuart Turner, 47 Market Place, Henley-on- Thames, Oxfordshire RG9 2AD, UK. Tel: + 4 4 1491 572655; Fax: + 44 1491 573704.

Multi-stage centrifugal pumps for irrigation duties

Designed to ISO 24548-C for o u t p u t s up to 7.5 m3/h the M a j m a r DHR S e r i e s of low n o i s e leve l , h i g h e f f i c i e n c y

hor izonta l mul t i s tage centr ifu- g a l p u m p s is s u i t a b l e fo r p r o c e s s w a t e r , t r a n s f e r a n d genera l indus t r i a l app l i ca t i ons as well as p ressu re boos t ing and i r r iga t ion duties.

The r a n g e c o m p r i s e s five sizes for p ressures up to 6 ba r and a m b i e n t t e m p e r a t u r e s up to 40 °C. A fea ture of the DHR Series is a high level of compo- nent in te rchangeab i l i ty as well as d i m e n s i o n a l c o m p a t i b i l i t y w i t h m o s t o t h e r m a n u f a c - tu re r ' s comparab l e designs.

Shafts, impel le rs and diffu- sers are s ta in less steel wi th cas t i ron end hous ing and ca rbon / ceramic single mechan ica l seal.

Motors are Class F insu la t ion with IP54 protect ion.

Contact: Richard Wadley, ADR Pumps Ltd, The Wheelhouse, Bond's Mill Estate, Stone- house, Glos GL10 3RF, UK. Tel: +44 1453 827774; Fax +44 1453 821118.

B Low maintenance disc coupl ing l ine launched

The F a l k C o r p o r a t i o n h a s announced the add i t ion of low- m a i n t e n a n c e , F D C c l o s e - coupled disc coupl ings to i ts disc coupl ing line.

Designed in bo th wide-gap and n a r r o w - g a p b e t w e e n - h u b m o d e l s , t h e c o u p l i n g s a r e su i ted to re t rof i t t ing e las tomer , grid, gear, or centre p la te -des ign disc couplings. The new design 's a x i a l l y - s p l i t s p a c e r a l l o w s r ep l acemen t of discs and hard- w a r e w i t h o u t d i s t u r b i n g connec ted equipment .

WORLD PUMPS MARCH 1995 I(