- Email: [email protected]
Boss filtration system maintains indoor air quality
DDUCTNEWS Redesigned, reduced cost HEPA filters now available
Packaging filtration with complete solids handling systems
D o n a l d s o n C o m p a n y Inc's high p u r i t y p r o d u c t s division h a s ree n g i n e e r e d two its high efficiency p a r t i c u l a t e air (HEPA) filters. The re-designed filters are said to offer t h e s a m e high level of c o n t a m i n a n t control, as before, at a r e d u c e d price. The 24" x 24" x 11.5" HEPA filters m e e t a n efficiency level of 99.97% on 0.3 m i c r o n s a n d contain pleated microfibre glass m e d i a s e p a r a t e d by corrug a t e d a l u m i n i u m spacers. Hemmed-edge aluminium s e p a r a t o r s e l i m i n a t e m e d i a damage and provide uniform
The Lakos "PREP" s y s t e m s are p a c k a g e s d e s i g n e d to s e p a r a t e a n d collect solids from liquid for c o n c e n t r a t e d d i s p o s a l or recovery. Pre-planned, p r e - e n g i n e e r e d and partially pre-assembled, e a c h s y s t e m is said to p r o m o t e a n e c o n o m i c a l a n d efficient total filtration c o n c e p t w h i c h r e d u c e s t h e t i m e required for engineering, purchasing, ass e m b l y a n d installation. Compatible options can help achieve zero s y s t e m liquid loss a n d enable t h e containm e n t of c o n c e n t r a t e d , s e p a -
p l e a t s p a c i n g to offer good flow u n i f o r m i t y . T h e s e filters a r e ruggedly c o n s t r u c t e d with galvanized steel or p r e s s e d woodb o a r d frames. The new filter assembly m e t h o d floods s e a l a n t all t h e w a y into t h e f r a m e s c o r n e r s before f a s t e n e r i n s e r t i o n , to ensure against corner leaks a n d provide a strong, "true-tos q u a r e " frame. Donaldson Company, Inc., 1400 West 94th Street, PO Box 1299, Minneapolis, MN 55440-1299, USA. Tel: +1 612 887 3475, Fax: + 1 612 887 3612.
r a t e d s o l i d s in a v a r i e t y of vessels for convenient disposal, re-use or salvage recovery. The p o t e n t i a l for significant w a s t e m i n i m i z a t i o n is e s p e cially i m p o r t a n t to t h o s e w h o m a y be able to d o w n g r a d e or e x e m p t t h e i r EPA s t a t u s as a w a s t e generator, t h e r e b y reducing w a s t e - h a n d l i n g costs, regu l a t o r y fees a n d paperwork. Claude Laval Corporation, 1365 North Clovis Avenue, Fresno, California 93727, USA. Tel: + 1 800 344 7205, fax: + 1 209 255 8093.
Economical replacement membrane offered
Efficient screening for wastewater
Fluid S y s t e m s h a s a n n o u n c e d t h e d e v e l o p m e n t of its TFCL low p r e s s u r e , t a p e - w r a p p e d 4" e l e m e n t for b r a c k i s h w a t e r purification. Designed to a c c o m m o d a t e •t h e n e e d for a n e c o n o m i c a l r e p l a c e m e n t for s t a n d a r d fibreglass reinforced plastic (FRP) m e m b r a n e s , t h e n e w 4826LP is ideal for s m a l l reverse o s m o s i s RO) u n i t s with p e r m e a t e req u i r e m e n t s of 2000 gallons p e r d a y or less. The m e m b r a n e offers a salt
Screen S y s t e m s Ltd h a s recently a d d e d a r a n g e of r u n - d o w n d e w a t e r i n g s c r e e n s to t h e i r p r o d u c t portfolio. Incorporating a curved screen m a d e from wedge profile wire, t h e s e u n i t s c a n be m a d e from p l a t e d steel, stainless steel, or UPVC a n d offer a n efficient m e a n s of r e m o v i n g solids from a l m o s t a n y liquid effluent in a n cost effective a n d t r o u b l e free m a n n e r . Involving no m o v i n g p a r t s a n d a l m o s t silent in operation, r u n - d o w n s c r e e n s are gravity fed from above, a n d u s e hydraulic s h e a r to remove as m u c h liquid as possible, allowing t h e p r o c e s s e d w a t e r to be recycled t h u s r e d u c i n g t h e v o l u m e of w a s t e w a t e r d i s c h a r g e d into t h e public system. The screen surface is s m o o t h p e r m i t t i n g a r a p i d dewatering action with t h e liquid p a s s i n g t h r o u g h t r a n s v e r s e slots in t h e w e d g e wire leaving solids to
rejection rate of 98% a n d 72 sq. ft of n o m i n a l active m e m b r a n e area. The TFCL 4826LP also f e a t u r e s a n e n d configuration design t h a t allows direct replac e m e n t with a variety of m a n u facturers' m e m b r a n e s w i t h o u t t h e n e e d for n e w a d a p t e r s . T h e s e 4" x 40" m e m b r a n e s are c u r r e n t l y in stock a n d ready for i m m e d i a t e delivery. Fluid Systems, 10054 Old Grove Road, San Diego, CA 92131, USA. Tel: + 1 619 695 3840.
Boss filtration system maintains indoor air quality Developed to solve s t r i n g e n t indoor air quality requirem e n t s , t h e Boss filter allows t h e c o a l e s c i n g of oil m i s t s , welding f u m e s a n d o t h e r sticky s u b m i c r o n particulate. By p r o v i d i n g u p to 85% recirculation of ventilating air, factory h e a t i n g costs are said to be proportionally reduced. The c o m m o n r e g e n e r a t i n g filters s u c h as p u l s e jet, electrostatic p r e c i p i t a t o r or s h a k e a n d clean u n i t s have proven ineffective for t h e s e a p p l i c a t i o n s bec a u s e t h e y quickly "blind". The d e s i g n of t h e Boss filter allows a reduced velocity collection t h r o u g h a roller m a t r i x with m i n i m u m i m p e d i m e n t to airflow. The m e d i u m is b o t h a u t o matically indexed and s u p p o r t e d by a m e s h carrier. The r e s u l t a n t fibre c o m p r e s s i o n o n t o t h e carrier a n d by controlling t h e m i n i m u m a n d m a x imum media pressure drop, " d e p t h filter efficiency" is obt a i n e d from a relatively shallow depth medium. Soiled a n d clean m e d i a rolls are h o u s e d o u t of t h e airstream, allowing r e p l a c e m e n t w i t h o u t operating interruption. This
674
also p r e v e n t s t h e m i g r a t i o n of contamination downstream d u r i n g soiled m e d i a removal. A l t h o u g h c o m p a r i s o n with prev i o u s roll filter d e s i g n s is inevitable, t h e Boss h a s a h i g h e r effective filter a r e a for a given size of casing. A s u p e r i o r edge seal design facilitates t h e high efficiency p a r t i c u l a t e a r r e s t ance that the new contaminant abatement standards demand. Used extensively througho u t N o r t h A m e r i c a in 160 installations, applications r a n g e from coolant s m o k e in m a c h i n e s h o p s to cooking oil f u m e s in egg roll factories. Presently m a n u f a c t u r e d in sizes of 800 to 80 000 cfm, t h e s y s t e m s have been applied ext e n s i v e l y in t h e a u t o m o b i l e manufacturing facilities on 1000 cfm individual m a c h i n e s to 800 000 cfm air-conditioned plants. A p a r t n e r is n o w being s o u g h t to develop t h e UK a n d E u r o p e a n market, a r r a n g i n g a sales a n d m a n u f a c t u r i n g network. Thermal Retention Inc, 5387 Echo Road, Bloomfield Hills MI 48013, USA. Tel: + 1 313 851 8836.
slide down t h e screen s u r f a c e t o w a r d s t h e d i s c h a r g e chute. The e n d result is a l m o s t dry solid w a s t e w h i c h is easy to d i s p o s e of or recycle. Screen c a p a c i t y is d e p e n d a n t on viscosity a n d solids loading in t h e liquid c o m b i n e d with s c r e e n i n g aperture. Single u n i t s c a n p r o c e s s u p to 18000 gallons p e r h o u r p e r foot width of screen, with n o m i n a l s c r e e n i n g down to 50 m i c r o n particle retention. Applications are to be f o u n d in m o s t i n d u s t r i e s a n d include food a n d livestock processing, d o m e s t i c sewerage, c h e m i c a l a n d p h a r m a c e u t i c a l industries, coal p r e p a r a t i o n , m i n e r a l s processing, p a p e r production, textile p l a n t s a n d agriculture. Screen Systems Lid, PO Box 237 The West Site, Britannia Works, Bewsey Road, Warrington WA5 5JZ, UI~ Tel: + 44 925 659906, fax: + 44 925 571060.
Low-cost fluid recovery system A simple-to-use hand controlled l i q u i d / s w a r f s e p a r a t o r for u s e in t h e m a c h i n e shop, h a s been l a u n c h e d by Filtermist I n t e r n a t i o n a l Plc. Using a P n e u m a s t e r comp r e s s e d air o p e r a t e d v a c u u m p u m p , t h e s y s t e m is suitable for recovering c o n t a m i n a t e d cutting fluids from all types of m a c h i n e tools s u c h as l a t h e s a n d milling m a c h i n e s . It is an i n d u s t r i a l wet vac u u m s y s t e m w h i c h is also c a p a b l e of collecting liquidb o r n e s o l i d s s u c h as m e t a l particles, c h i p s a n d granules. The n e w s w a r f filter can also be u s e d for cleaning o u t w e t s c r u b b e r s a n d d r a i n s in factories. The s y s t e m c o n s i s t s of a 125
litre (28 gal) o p e n t o p d r u m into w h i c h is placed a t i g h t fitting, perforated m e s h s w a r f basket. This is sealed by a clip-on lid fitted with two t h r e a d e d inlets for t h e P n e u m a s t e r p u m p a n d collection hose. S w a r f a n d c h i p s a r e collected in t h e s t r a i n e r b a s k e t w h i c h c a n be lii~ed o u t a n d emptied. L i q u i d is d r a i n e d a w a y t h r o u g h a 4 0 m m valve, to w h i c h t h e s u c t i o n h o s e c a n be fitted if required. For mobility, a four wheel dolly is available. Filtermist I n t e r n a t i o n a l Plc, F a r a d a y Drive, B r i d g n o r t h , Shropshire WV15 5BA. Tel: + 44 746 765361.
November 1994
Filtration & Separation
Packaging filtration with complete solids handling systems
D o n a l d s o n C o m p a n y Inc's high p u r i t y p r o d u c t s division h a s ree n g i n e e r e d two its high efficiency p a r t i c u l a t e air (HEPA) filters. The re-designed filters are said to offer t h e s a m e high level of c o n t a m i n a n t control, as before, at a r e d u c e d price. The 24" x 24" x 11.5" HEPA filters m e e t a n efficiency level of 99.97% on 0.3 m i c r o n s a n d contain pleated microfibre glass m e d i a s e p a r a t e d by corrug a t e d a l u m i n i u m spacers. Hemmed-edge aluminium s e p a r a t o r s e l i m i n a t e m e d i a damage and provide uniform
The Lakos "PREP" s y s t e m s are p a c k a g e s d e s i g n e d to s e p a r a t e a n d collect solids from liquid for c o n c e n t r a t e d d i s p o s a l or recovery. Pre-planned, p r e - e n g i n e e r e d and partially pre-assembled, e a c h s y s t e m is said to p r o m o t e a n e c o n o m i c a l a n d efficient total filtration c o n c e p t w h i c h r e d u c e s t h e t i m e required for engineering, purchasing, ass e m b l y a n d installation. Compatible options can help achieve zero s y s t e m liquid loss a n d enable t h e containm e n t of c o n c e n t r a t e d , s e p a -
p l e a t s p a c i n g to offer good flow u n i f o r m i t y . T h e s e filters a r e ruggedly c o n s t r u c t e d with galvanized steel or p r e s s e d woodb o a r d frames. The new filter assembly m e t h o d floods s e a l a n t all t h e w a y into t h e f r a m e s c o r n e r s before f a s t e n e r i n s e r t i o n , to ensure against corner leaks a n d provide a strong, "true-tos q u a r e " frame. Donaldson Company, Inc., 1400 West 94th Street, PO Box 1299, Minneapolis, MN 55440-1299, USA. Tel: +1 612 887 3475, Fax: + 1 612 887 3612.
r a t e d s o l i d s in a v a r i e t y of vessels for convenient disposal, re-use or salvage recovery. The p o t e n t i a l for significant w a s t e m i n i m i z a t i o n is e s p e cially i m p o r t a n t to t h o s e w h o m a y be able to d o w n g r a d e or e x e m p t t h e i r EPA s t a t u s as a w a s t e generator, t h e r e b y reducing w a s t e - h a n d l i n g costs, regu l a t o r y fees a n d paperwork. Claude Laval Corporation, 1365 North Clovis Avenue, Fresno, California 93727, USA. Tel: + 1 800 344 7205, fax: + 1 209 255 8093.
Economical replacement membrane offered
Efficient screening for wastewater
Fluid S y s t e m s h a s a n n o u n c e d t h e d e v e l o p m e n t of its TFCL low p r e s s u r e , t a p e - w r a p p e d 4" e l e m e n t for b r a c k i s h w a t e r purification. Designed to a c c o m m o d a t e •t h e n e e d for a n e c o n o m i c a l r e p l a c e m e n t for s t a n d a r d fibreglass reinforced plastic (FRP) m e m b r a n e s , t h e n e w 4826LP is ideal for s m a l l reverse o s m o s i s RO) u n i t s with p e r m e a t e req u i r e m e n t s of 2000 gallons p e r d a y or less. The m e m b r a n e offers a salt
Screen S y s t e m s Ltd h a s recently a d d e d a r a n g e of r u n - d o w n d e w a t e r i n g s c r e e n s to t h e i r p r o d u c t portfolio. Incorporating a curved screen m a d e from wedge profile wire, t h e s e u n i t s c a n be m a d e from p l a t e d steel, stainless steel, or UPVC a n d offer a n efficient m e a n s of r e m o v i n g solids from a l m o s t a n y liquid effluent in a n cost effective a n d t r o u b l e free m a n n e r . Involving no m o v i n g p a r t s a n d a l m o s t silent in operation, r u n - d o w n s c r e e n s are gravity fed from above, a n d u s e hydraulic s h e a r to remove as m u c h liquid as possible, allowing t h e p r o c e s s e d w a t e r to be recycled t h u s r e d u c i n g t h e v o l u m e of w a s t e w a t e r d i s c h a r g e d into t h e public system. The screen surface is s m o o t h p e r m i t t i n g a r a p i d dewatering action with t h e liquid p a s s i n g t h r o u g h t r a n s v e r s e slots in t h e w e d g e wire leaving solids to
rejection rate of 98% a n d 72 sq. ft of n o m i n a l active m e m b r a n e area. The TFCL 4826LP also f e a t u r e s a n e n d configuration design t h a t allows direct replac e m e n t with a variety of m a n u facturers' m e m b r a n e s w i t h o u t t h e n e e d for n e w a d a p t e r s . T h e s e 4" x 40" m e m b r a n e s are c u r r e n t l y in stock a n d ready for i m m e d i a t e delivery. Fluid Systems, 10054 Old Grove Road, San Diego, CA 92131, USA. Tel: + 1 619 695 3840.
Boss filtration system maintains indoor air quality Developed to solve s t r i n g e n t indoor air quality requirem e n t s , t h e Boss filter allows t h e c o a l e s c i n g of oil m i s t s , welding f u m e s a n d o t h e r sticky s u b m i c r o n particulate. By p r o v i d i n g u p to 85% recirculation of ventilating air, factory h e a t i n g costs are said to be proportionally reduced. The c o m m o n r e g e n e r a t i n g filters s u c h as p u l s e jet, electrostatic p r e c i p i t a t o r or s h a k e a n d clean u n i t s have proven ineffective for t h e s e a p p l i c a t i o n s bec a u s e t h e y quickly "blind". The d e s i g n of t h e Boss filter allows a reduced velocity collection t h r o u g h a roller m a t r i x with m i n i m u m i m p e d i m e n t to airflow. The m e d i u m is b o t h a u t o matically indexed and s u p p o r t e d by a m e s h carrier. The r e s u l t a n t fibre c o m p r e s s i o n o n t o t h e carrier a n d by controlling t h e m i n i m u m a n d m a x imum media pressure drop, " d e p t h filter efficiency" is obt a i n e d from a relatively shallow depth medium. Soiled a n d clean m e d i a rolls are h o u s e d o u t of t h e airstream, allowing r e p l a c e m e n t w i t h o u t operating interruption. This
674
also p r e v e n t s t h e m i g r a t i o n of contamination downstream d u r i n g soiled m e d i a removal. A l t h o u g h c o m p a r i s o n with prev i o u s roll filter d e s i g n s is inevitable, t h e Boss h a s a h i g h e r effective filter a r e a for a given size of casing. A s u p e r i o r edge seal design facilitates t h e high efficiency p a r t i c u l a t e a r r e s t ance that the new contaminant abatement standards demand. Used extensively througho u t N o r t h A m e r i c a in 160 installations, applications r a n g e from coolant s m o k e in m a c h i n e s h o p s to cooking oil f u m e s in egg roll factories. Presently m a n u f a c t u r e d in sizes of 800 to 80 000 cfm, t h e s y s t e m s have been applied ext e n s i v e l y in t h e a u t o m o b i l e manufacturing facilities on 1000 cfm individual m a c h i n e s to 800 000 cfm air-conditioned plants. A p a r t n e r is n o w being s o u g h t to develop t h e UK a n d E u r o p e a n market, a r r a n g i n g a sales a n d m a n u f a c t u r i n g network. Thermal Retention Inc, 5387 Echo Road, Bloomfield Hills MI 48013, USA. Tel: + 1 313 851 8836.
slide down t h e screen s u r f a c e t o w a r d s t h e d i s c h a r g e chute. The e n d result is a l m o s t dry solid w a s t e w h i c h is easy to d i s p o s e of or recycle. Screen c a p a c i t y is d e p e n d a n t on viscosity a n d solids loading in t h e liquid c o m b i n e d with s c r e e n i n g aperture. Single u n i t s c a n p r o c e s s u p to 18000 gallons p e r h o u r p e r foot width of screen, with n o m i n a l s c r e e n i n g down to 50 m i c r o n particle retention. Applications are to be f o u n d in m o s t i n d u s t r i e s a n d include food a n d livestock processing, d o m e s t i c sewerage, c h e m i c a l a n d p h a r m a c e u t i c a l industries, coal p r e p a r a t i o n , m i n e r a l s processing, p a p e r production, textile p l a n t s a n d agriculture. Screen Systems Lid, PO Box 237 The West Site, Britannia Works, Bewsey Road, Warrington WA5 5JZ, UI~ Tel: + 44 925 659906, fax: + 44 925 571060.
Low-cost fluid recovery system A simple-to-use hand controlled l i q u i d / s w a r f s e p a r a t o r for u s e in t h e m a c h i n e shop, h a s been l a u n c h e d by Filtermist I n t e r n a t i o n a l Plc. Using a P n e u m a s t e r comp r e s s e d air o p e r a t e d v a c u u m p u m p , t h e s y s t e m is suitable for recovering c o n t a m i n a t e d cutting fluids from all types of m a c h i n e tools s u c h as l a t h e s a n d milling m a c h i n e s . It is an i n d u s t r i a l wet vac u u m s y s t e m w h i c h is also c a p a b l e of collecting liquidb o r n e s o l i d s s u c h as m e t a l particles, c h i p s a n d granules. The n e w s w a r f filter can also be u s e d for cleaning o u t w e t s c r u b b e r s a n d d r a i n s in factories. The s y s t e m c o n s i s t s of a 125
litre (28 gal) o p e n t o p d r u m into w h i c h is placed a t i g h t fitting, perforated m e s h s w a r f basket. This is sealed by a clip-on lid fitted with two t h r e a d e d inlets for t h e P n e u m a s t e r p u m p a n d collection hose. S w a r f a n d c h i p s a r e collected in t h e s t r a i n e r b a s k e t w h i c h c a n be lii~ed o u t a n d emptied. L i q u i d is d r a i n e d a w a y t h r o u g h a 4 0 m m valve, to w h i c h t h e s u c t i o n h o s e c a n be fitted if required. For mobility, a four wheel dolly is available. Filtermist I n t e r n a t i o n a l Plc, F a r a d a y Drive, B r i d g n o r t h , Shropshire WV15 5BA. Tel: + 44 746 765361.
November 1994
Filtration & Separation