7/27/2019 Art Doc 4841

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06

An

Introductionto

JabscoandRule

Pumps Flexible Impeller

Good Pumping Practice:Pipe runs should a lways be kept as short and stra ight as possib le. Plumbing should a lways be

re in forced, non-co l lapsib le hose of the recomm ended size. Electr ic pumps shou ld a lways be

insta l led in a dry, wel l vent i la ted posi t ion as close to the l iqu id to be pu mped as po ssib le.

Flexible impeller pumps must not be run dry. Bi lge pumps and water pumps inpart icu lar should a lways be f i t ted wi th a f i l te r or st ra iner on the in le t p lumbing t o protect them

from d ebris. These should be fastened to the boat st ructure to ensure the i r permanent locat ion.

Mou nt f lexib le impel ler pumps so that some w ater is le f t in the pump body w hen the pump is

shut o f f . Th is wi l l p ro long impel ler l i fe and speed pr iming. Pumps must be insta l led wi th t he

overboard d ischarge wel l above the water l ine (both sta t ic and heeled) to avo id water siphoningback in to th e vessel.

Features: Versatile:The f lexib le impel ler pum p com bines the pr iming f eatures of posi t ive d isp lacement

type pum ps wi th the genera l t ransfer ab i l i ty o f centr i fuga ls. I t wi l l pump e i ther th in or viscousl iqu ids and can handle more so l ids in suspension than oth er types of ro tary pumps. The pumpcan be moun ted at any angle and wi l l pum p in e i ther d i rect ion wi th equal e f f iciency.

Self-Priming:Pumps instant ly wi th dry suct ion l i f ts up to 10f t (3m) and up to 25f t (8m ) whenwe t t e d .

Simplicity: One mo ving part - a to ugh, long-l i fe , w ear-resistant f lexib le impel ler.

Flexibility: The f lexib le impel ler pump of fers both h igh f low and h igh pressure accord ing tomoto r and impel ler design.

a. Flexible impeller blades createa nearly perfect vacuum forinstant se l f -pr iming.

b. As the im pel ler ro ta tes, eachsuccessive b lade draw s inl iqu id and carr ies i t f romintake to out le t port .

c. As the f lexib le impel ler b ladescontact the of fset cam theybend wi th a squeezing act ionthat provides a cont inuous,u n i f o r m f l o w .

CentrifugalGood Pumping Practice:

Pipe runs should be kept as short and stra ight as possib le , avo id ing r ising and d ipp ing over

obstruct ions as th is can cause a i r- locks. Always use hose of the recomm ended size. Submersib le

b i lge pumps m ust be insta l led wi th the overboard d ischarge wel l above the w ater l ine (both sta t ic

and heeled) to avo id water siphoning back in to the vessel.

Features: High Volume Flow: Centr i fuga l pumps handle h igh vo lumes wi th a smooth, non-pulsat ing

f l o w . T h e f lo w r a t e ca n b e r e g u la t e d f r o m ma x i mu m o u t p u t t o n o f l o w w i t h n o d a ma g e t o t h epump. An excel lent pump for genera l t ransfer appl icat ions.

Low Maintenance: Few moving parts mean that wear due to operat ion is min imal .

Easy Installat ion: Compact size for f low ra te . Opt ion of port posi t ions simpl i f ies p ipe runs.

Versatility: Centr i fuga l pumps can be bu i l t in subm ersib le form making excel lent b i lge pumps.

Low Power Consumption: Electr ic centr i fuga l pump s consume less power than most o therb i lge pumps.

How it w orks:

How it w orks:

How it w orks:

a. Centr i fuga l pumps must beei ther in i t ia l ly pr imed ormounted in such a way thatl iqu id is permanent ly ava i lab leat the in le t port(eg. submersib le pumps).

b. The ro ta t ing imp el ler g ivesveloci ty energy to the l iqu idmoving i t to the periphery o fthe vo lu te casing and towardsthe d ischarge port .

c. The vo lu te casing d ischargearrangement converts ve loci tyenergy in to sta t ic pressure orava i lab le pump head.

a

a

b

b

c

c

Slidi ng VaneGood Pumping Practice:

Pipe runs should be kept as short and stra ight as possib le , avo id ing r ising and d ipp ing over

obstruct ions as th is can cause a i r- locks. Always use hose of the recomm ended size and of a r ig id

or re in forced type that w i l l not co l lapse under suct ion condi t ions. Electr ic pumps should a lways be

insta l led in a dry, wel l vent i la ted, posi t ion as close as possib le to the l iqu id to b e pump ed.

Featu res: Durable: Heavy duty construct ion in qual i ty mater ia ls g ives long l i fe . The body is designed to

resist en vi ron me n ta l damage. The vanes and ro tor are construct ed of a w ear resistant long l i femater ia l .

Self-priming: Sel f -pr iming up to 13f t (4m).

Simplicity: There are few moving p arts to rep lace. The ro tor, vanes and seal are lubr icated bythe l iqu id be ing pumped.

Versatile:An excel lent compact un i t for pu mping d iese l fue l or hydrau l ic o i l .Can run in e i ther d i rect ion.

a. The vanes create a part ia lva cu u m f o r p r i m i n g .

c. When the vanes contact theeccentr ic port ion of thepump body, they force l iqu idout the d ischarge port .

b. As the ro tor ro ta tes, eachsuccessive vane draw s andcarr ies liqu id f rom the in taketo the d ischarge port .

DiaphragmGood Pumping Practice:Electr ic pumps should a lways be insta l led in a dry, w el l vent i la ted posi t ion as close as possib le to

the l iqu id to be pum ped. Plumbing should a lways be re in forced, non co l lapsib le hose of the

recomm ended size. Bi lge pumps and water pump s in part icu lar should a lways be f i t ted wi th a

f i l te r and stra iner on the in le t p lumbing to protect them from debris. These should be fastened to

the boat st ructure to ensure the i r permanent locat ion. Pum ps must be insta l led wi th the overboard

discharge wel l above the water l ine (both sta t ic and heeled) to avo id water siphoning back in to the

vessel . Electr ic d iaphragm pumps can be run dry for up to 2 hours.

Features: Self-priming: Vert ica l l i f t up to 16f t (5m) for manual pumps and 610f t (23m) for e lectr ic

p u mp s.

Dry Running: Diaphragm pumps can be run dry for extended periods wi th no damage,therefore requi r ing less a t tent ion in use.

Versatility: Sel f -pr iming and dry running capabi l i t ies mean few l imi ta t ions on use. Largermanual d iaphragm pump s have the ab i l i ty to handle some so l ids in suspension. Electr icd iaphragm pum ps make excellent b i lge pumps for boats wi th shal low b i lges, or b i lges wi threstr icted areas.

Quiet Running: Electr ic pumps feature smooth f low and low no ise leve ls.

a. The d iaphragm, pu l led upwards by themovem ents o f a p iston or a handle causes apart ia l vacuum, opening the in le t port andclosing the out le t , drawing in l iqu id .

b. Do wn wa r d m o ve me n t o f t h e d i a p h r a g mpressurizes the l iqu id , closing the in le t va lve andopening the out le t va lve through which l iqu id isexpel led by pressure.

W A R N I N G

No pum p manu fac tured by Jabsco should be u sed forgasol ine, pet roleum p rod ucts or any f luid with a f lashpoint below 100 F (38 C).

a

b

b

a

c

How it w orks:

In t r o d u ct i o n In t r o d u ct i o n