380 SeriesMulti-Stage Centrifugal Pumps380 SeriesMulti-Stage Centrifugal Pumps

Flows to: 4,800 GPMHeads to: 2100 Feet

Temperatures to: 500° F

HK

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OSMH - 4 Stage

HJ

OSMH6 Stage

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HT

American-Marsh Pumps, one of the oldestpump lines in America, are pump productssteeped in heritage. Since 1873, the American-Marsh line of pumps has withstood the test oftime. During the last 130 years, over 100 vari-eties of pumps have been designed and built.From steam pumps to centrifugal pumps,American-Marsh pumps have been built tomeet the ever changing requirements of society.Over the last century through continuous prod-uct development, more American-Marsh mod-els have been retired than most other pumpmanufacturers have ever produced. Hundredsof thousands of pumps have been made, alldesigned for longevity, allowing many of themto continue servicing customers over 50 years.All of our pumps have three superior charac-

teristics; Design, Performance, and Durability.Our engineering department, which includes anin-house pattern shop, designs each pump sothat installation and maintenance is easy. Ourperformances are engineered to meet or beatthe competition in each category. For 130years, American-Marsh Pumps products have

130 Years of Pump Manufacturing

provided cost effective solutions by buildingpumps to last. Durability by design is always themost cost effective solution. From engineeringand design to final assembly, experienced peoplecontrol each step of the manufacturing processwith quality control inspections performed ateach step. All pumps shafts are heat straight-ened. All impellers are computer balanced.Pump testing is done in our new state of the arttest facility. All of these factors ensure youreceive consistent quality product every time.American-Marsh Pumps has provided quality

pump products for over 130 years. AtAmerican-Marsh Pumps, we know that long lifeand superior performance are the keys to satis-fied customers. By understanding your needs,we can design products that meet those needs.Our product family reflects years of customerinput, product upgrades, redesign and newproduct development, all focused on meetingand exceeding your expectations.

Casing: The casing is of high tensile cast iron or otherspecified material. It is of the volute type, split on the hor-izontal center line with the suction and discharge flangesas well as the bearing brackets (HH & HJ) cast integralwith the lower half. Removal of the upper half of the cas-ing gives complete access to the interior of the pump with-out disturbing the piping connections or pump alignment.Ample wall thickness provides a generous allowance forcorrosion. HT models have water passages lined withporcelain enamel, shall be free of blow holes, sand holesand other detrimental defects, and shall be accuratelymachined and fitted.

Stage Arrangement: HH, HJ & OSMH models havestage arrangements such that each stuffing box is onlyunder first stage pressure. Furthermore, the maximumpressure difference across any of the stage pieces, separat-ing the impeller chambers, is reduced to that of the firststage. Impellers are opposed or back-to-back to eliminateend thrust and volutes are staggered to balance radialthrust. This hydraulic balancing of all radial and end thrustis obtained without the use of troublesome balancing disksor other devices that reduce efficiency. Thus the efficiencyis inherently high and sustained over long periods of time.HT models feature high efficiency, diffuser bowls thattransition flow from one stage to the next. Impellers arestacked in the same direction and can achieve very highheads while maintaining high efficiency.

Impellers: The impellers are of the single suction,enclosed, non-overloading type. They are placed back toback to balance the end thrust without the use of extraseal rings or other balancing devices. Impellers are made ofbronze, cast iron, or other specified material, machinedand polished all over, and dynamically and hydraulicallybalanced. They are keyed to the shaft and secured by locknuts.

Casing and Impeller Wear Rings: The casing andimpeller wear rings are of bronze, cast iron or other speci-fied material. Both rings have large wearing surfaces toreduce leakage losses. HH case wear rings are of thelabyrinth type with the diameter at wearing surfacereduced to a minimum, and are firmly secured in the cas-ing by dowel pins. HK & OSMH casing wear rings areheld rigidly in the casing by a tongue and groove fit withoffset on the horizontal centerline – thus preventing rota-tion without using holding pins or screws.

Shaft: The shaft is of 420 stainless steel, ground to accu-rate dimensions and polished to a smooth surface. It isdesigned for extra stiffness to avoid all critical speeds inoperation, and is threaded for bearing and lock nuts. Onpumps with more than two impellers, impeller keys arestaggered to prevent uneven stresses and unbalance.

Shaft Sleeves: The shaft sleeves are of bronze, or otherspecified material, extending from the impeller hub

through the stuffing boxes and secured to the shaft bytwin positive locknuts. Stuffing boxes prevent leakagealong the shaft while allowing freedom for the sleeve toexpand independently of the shaft expansion.

Stuffing Boxes: The stuffing boxes are extra deep,designed for six rings of packing in addition to the lanternring. Under each stuffing box is a drip pocket with tappeddrain outlet. HK and OSMH models are arranged forwater cooling and are extra deep. Throat bushings protectmain casing from wear. Lantern rings are provided within-and-out connections provided for both boxes to permitthe circulation of sealing water or a lubricating mediumwhen required by special service conditions. A wide vari-ety of mechanical seals are available upon request.

Glands: The glands are of the hinge bolt type, split foreasy removal and fastened together with capscrews.

Bearings: On HH & HJ models both the inboard andoutboard ball bearings are of the single row, deep groovetype, precision grade, with cartridge mounting, permittingthe removal of the shaft without exposing or disturbingthe bearing assembly. They are of extra large capacity forboth radial and thrust loads, and are locked to the shaftwith nut and positive nut lock. The outboard bearing isconfined rigidly in the bearing housing to take the endthrust, while the inboard bearing is set with sufficientclearance to allow for shaft expansion. Each bearing isdesigned for grease lubrication and is provided with awater slinger to prevent leakage from the stuffing box intothe bearing. A grease zerk fitting is furnished for eachbearing. HT models feature a grease lubricated, doublerow thrust bearing with an integral, single lip oil seal. HK& OSMH bearings are of the double row type with posi-tive ring oiling. The inboard bearing carries the radial loadand is free to move in either direction. The outboardbearing is of the angular contact, duplex type to carryeither radial or unbalanced thrust loads and maintainimpellers in their proper positions.

Bearing Housings: HH & HJ models are of the car-tridge type and designed to be removed from the pumpwith the rotating assembly. HT models feature a doublerow, thrust bearing that withstands all thrust generated bythe bowl assembly. HK & OSMH bearings are split on thehorizontal centerline, similar to the pump casing, so thatthe housings need not be detached from the lower part ofthe casing when removing the rotating element. The cool-ing water jacket extends around the entire circumferenceof the bearing housing so that cooling is uniform and nodamaging stresses are set up as might be the case whenthe cooling jacket is only around one-half the circumfer-ence as used in older designs. No gaskets are required, socooling water cannot leak into oil reservoirs and bearingreplacements will always fit.

SpecificationsHH, HJ, HK, OSMH & HT Series

Model HH PumpCasing

• Standard ASTM A48 Class 30 cast iron• Horizontally split for easy access• Heavy wall thickness to provide

generous corrosion allowance• Extra large water passage between

stages to reduce friction loss• Labyrinth type casing rings

provide liberal clearance with minimum leakage

• Standard 250 lb discharge and 125 lb suction flanges

Sizes: 1-1/2" to 4"Flows: 900 GPMHeads: 950 FeetTemp: 350° F

Services:• Boiler Feed• Pressure Booster System• Roof Tank Fill Pumps in

High Rise Buildings• High Pressure Condenser or

Chilled Water Services• General High Pressure

Boost Requirements

2 0 0 4 0 0 6 0 0 8 0 0 1 0 0

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Inboard Bearing• Heavy duty ball bearing,

purge-type greaselubrication standard, ring oiled optional fortemperatures above 240° F (shown)

• Carries radial load; freeto move axially

Shaft Sleeves• Replaceable bronze sleeves

protect shaft from wear andcorrosion

Impellers• One piece bronze or other alloy• Expertly machined to customer specifications• Opposed, to balance axial thrust hydraulically• Fully balanced before assembly

Outboard Bearing• Heavy duty ball bearing,

purge-type grease lubrication,ring oiled optional

• Fixed rigidly in housing totake end thrust load

• Maintains impellers in theircentral position

Bearing Housings• Bearings are cartridge-mounted to

permit easy removal of rotatingelement

• Bronze shaft bushings protect shaftfrom wear

• Shaft bushings also act as waterslingers to prevent leakage intobearing

Stuffing Boxes• Extra deep, with split glands• Lantern rings standard in inboard box;

can be furnished in outboard box• Optional mechanical seals available on

request• Maximum of first stage pressure on

inboard and outboard boxes

Shaft• Designed and sized especially for the

pump and its applications• 420 stainless steel shaft standard

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Model HJ Pump

Sizes: 1-1/2" to 8"Flows: 4800 GPMHeads: 1100 FeetTemp: 350° F

Services:• Boiler Feed• Pressure Booster System• Roof Tank Fill Pumps in

High Rise Buildings• High Pressure Condenser or

Chilled Water Services• General High Pressure

Boost Requirements

Casing• Standard ASTM A48 Class 30

cast iron• Horizontally split for easy access• Heavy wall thickness to provide

generous corrosion allowance• Extra large water passage between

stages to reduce friction loss• Replaceable casing rings provide

liberal clearance with minimumleakage

• Standard 250 lb discharge and 250 lb suction flanges

• Casing has Thru-Bore whichallows the removal of the entirerotating assembly, including bothstuffing boxes, and the entirebearing housing assembly

Outboard Bearing• Heavy duty ball bearing,

purge-type grease lubricationstandard

• Fixed rigidly in housing to takeend thrust load

• Maintains impellers in theircentral position

Shaft Sleeves• Replaceable bronze sleeves protect

shaft from wear and corrosion• Shaft sleeve o-ring on outer diameter

of shaft to protect it from damageagainst shaft sleeve threads

Impellers• One piece bronze or other alloy• Expertly machined to customer specifications• Opposed to balance axial thrust hydraulically• Fully balanced before assembly

Inboard Bearing• Heavy duty ball bearing, purge-type

grease lubrication standard• Carries radial load; free to move

axially

Bearing Housings• Cartridge bearing arrangement allows the

removal of the entire bearing housingassembly with the rotating element

• Both the inboard and outboard bearing canbe completely replaced without disturbing anyother part of the rotating assembly

• Both bearings are protected by lip seals tokeep contaminants out of bearing housing

Stuffing Boxes• Extra deep, with split glands• Lantern rings standard in inboard box;

can be furnished in outboard box• Optional mechanical seals available on

request• Maximum of first stage pressure on

inboard and outboard boxes• Fully removable with rotating assembly.

Shaft• Designed and sized especially for

the pump and its applications• 420 stainless steel shaft standard

Model OSMH Pump

Sizes: 1-1/2" to 4"Flows: 800 GPMHeads: 2100 FeetTemp: 500° F

Services:• Boiler Feed• Pressure Booster System• High Pressure Condenser

or Chilled Water Services• Mining Water Services• City Water Supply• Fire Protection Services• Barge Transfer Booster Pumps• Paper Mills• Steel Mills• Ash-Sluice Services• Chemical Injection

Casing• Standard ASTM A48 Class 30 cast iron• Horizontally split for easy access• Heavy wall thickness to provide

generous corrosion allowance• Extra large, streamlined passage area

between stages, for smooth flow andhigh efficiency

• Tongue and groove casing fits, withoffset, to prevent rotation of rings andbushings

• Standard 600 lb suction and dischargeflanges

Outboard Bearing• Heavy duty water cooled, angular

contact duplex ball bearing, ring-oiled

• Carries both thrust and radial loads• Maintains impellers in their central

position

Shaft• Designed and sized especially for

the pump and its applications• 420 Stainless steel shaft standard

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2000 3500RPM

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Impellers

• One piece bronze or other alloy• Expertly machined to customer specifications• Opposed, to balance axial thrust hydraulically• Fully balanced before assembly

Volutes• Staggered, to balance radial thrust hydraulically

Inboard Bearing• Heavy duty water cooled double

row ball bearing, ring-oiled • Carries radial load; free to move

horizontally

Bearing Housings• Split on the horizontal center line for easy access;

cartridge-mounted to permit easy removal ofrotating element, with bronze shaft bushingswhich also act as water slingers to prevent leakageinto the bearing

• For uniform cooling, water jacket extends aroundentire circumference of each housing

Stuffing Boxes• Extra deep, water cooled,with throat bushings and split

glands (optional flush type gland as shown)• Suction pressure on first stage stuffing box and first

stage pressure on other stuffing box• Lantern rings standard• Optional mechanical seals available on request

Shaft Sleeves• Replaceable bronze sleeves protect shaft

from wear and corrosion

Wear Rings• Standard bronze case and

impeller rings• Case rings designed for tongue

and groove fit to prevent rotation• Machined to close tolerance• Oversized large wearing surfaces

Model HT Pump

Sizes: 3" to 10" DischargeFlows: 2500 GPMHeads: 2500 FeetTemp: 400° F

Services:• Boiler Feed• Pressure Booster System• Salt Water Injection• LPG Applications

Thrust Bearing Housing• Constructed of ASTM A48 class 30 cast iron• Simplex or duplex bearing designed to maintain

all thrusts generated by pump assembly• Integral oil lip seal to minimize the entrance of

contaminents• Thrust bearing adapter allows for easy lateral

impeller adjustment

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.3 3 4 5 6 7 8 9.4 .5 .6 .7 10.8 .9 1 151.5 20 252 2.5CAPACITY IN 1000 U.S. GPM

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Motor• Standard, stocked C-Face motor• ODP, TEFC, and Explosion Proof

motor enclosures available• Close-coupled design eliminates

alignment issues

Suction Head• The suction head can be mounted in

one of four directions to allow forincreased flexibility in the field

• Heavy duty fabricated carbon steel• 150 pound rating standard• Other ratings possible based on

customer requirements

Seal Chamber• Separate seal chamber ensures that the seal is

protected during operation• Standard 820 series component mechanical seal• Integral bronze throat bushing standard• Optional component or cartridge seals available• Optional flush plans available upon request

Discharge Flange• An optional 90 degree discharge elbow

can be supplied orientating the dischargein one of any 10 directions

• Extra pressure discharge flange• 600 pound rating standard• Other ratings possible based on

customer requirements

Bowl Assembly• O-ring bowl construction allows for dry-pit applications• Modular bowl assembly allows for the swapping of the entire

bowl assembly during servicing• Heavy wall ASTM A48 class 30 cast iron construction with

bronze impellers or other specified material• Reversed bowl assembly allows low pressure on mechanical seal• Impellers are expertly machined to customer specifications• 416 stainless steel pump shaft• Heavy duty bronze bowl bearings standard• Colleted or keyed impellers

SHAFTS

American-Marsh Pumps standard product designincludes 420 stainless steel shafts designed for mini-mum shaft deflection in high temperature environ-ments. Each shaft is machined to close tolerancesand designed to exceed HP requirements of eachpump.

BEARINGS

In the OSMH and HK models, dou-ble row angular contact bearings (forthrust) and double row radial bear-ings are a standard feature. Single rowbearings are employed for HH andHJ series pumps. Lubrication is avail-able in ring oiled or purge greasedesigns.

SLEEVES

Each multistage design includesbronze shaft sleeves as standard.Sleeves are machined to exact tolerances and protect the shaft.

CASING

Casing is split on the horizontal centerlineand provided with extra thick casing walls.Surfaces are machined to accurate tolerancesin our machining centers.

WEAR RINGS

Impeller and case wear rings are oversized with largewearing surfaces to extend the life of each pump.Rings are available in bronze, iron, stainless steel orother alloys as required.

MECHANICAL SEALS/ PACKING

Stuffing boxes can be provided with standard orlow leak packing or mechanical seal as required bythe customer and application.

OTHER PUMP PRODUCTS

SPLIT CASETo 44" Discharge 73,000 GPM, 550'

VERTICAL TURBINETo 30+" Bowl30,000+ GPM, 1400+'

SELF PRIMERTo 12" Discharge 6400 GPM, 260'

REGENERATIVE TURBINETo 2" Discharge65 GPM, Heads to 1000'

END SUCTIONTo 12" Discharge9000 GPM, 450'

Our long tradition of quality pump manufacturing began in 1873 makingus one of the first pump manufacturers in this country. American-MarshPumps provides the user dependability and durability. Durability by design isalways the most cost effective solution.

American-Marsh Pumps185 Progress RoadCollierville, TN 38017PH: (800)888-7167FX: (901)860-2323

Branch/Service Centers:Nebraska: 113 South Lincoln Avenue, Hastings, NE 68901 (800)408-7167California: 3269 East North Building D, Fresno, CA 93725 (800)288-7167Florida: 2805 Badger Road, Lakeland, FL 33811 (800)444-7167www.american-marsh.com