1800 Series Single Stage Split Case Pumps
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FAIRBANKS NIJHUIS 1800 Series ™ SINGLE STAGE SPLIT CASE PUMPS www.FairbanksNijhuis.com

SINGLE STAGE SPLIT CASE PUMPS FAIRBANKS NIJHUIS 1800 Series ™ Single Stage Split Case Pumps Capacities to 15000 GPM (3407 m3/hr) Heads to 663 Ft. (202 m) Temperatures to 275˚F (135˚C) Introduction The horizontal split case pump has long and properly been used for the handling of liquids where the utmost in reliability and accessibility are paramount. Billions of gallons of liquid have been pumped by split case double suction pumps and billions more will be pumped considering the rapid industrial, agricultural and commercial expansion. The Fairbanks Nijhuis 1800 Series pumps make a...

SINGLE STAGE SPLIT CASE PUMPS Pump Features DISCHARGE Standard Features • Bronze fitted pump construction • Internal bypass between casing and stuffing box • Bronze shaft sleeves • Dynamically balanced impellers • 250 psi case working pressure • Bronze case wearing rings • Twin volute on 10" and larger pumps • Stainless steel impeller key • Carbon steel shaft STANDARD RIGHT-HAND ROTATION • Lifting lugs • Regreaseable ball bearings • Hydrostatic test • Single row ball bearing (inboard) • Double row ball bearing (outboard) • Mechanical seals...single unbalanced (Model 1810 and 1840) •...

SINGLE STAGE SPLIT CASE PUMPS Horizontal Pump Features A Split Case Design simplifies disassembly. The suction and discharge piping and alignment is not disturbed. Simply remove the upper casing for service or inspection. Cast lifting lugs are provided. Computer-machined major components with 360 degree registered fits assure concentricity of all parts. Twin volute design balances out radial hydraulic thrust loads on larger split case pumps (see Range Charts). Dynamically Balanced Impeller Bronze Shaft Sleeve prevents shaft wear, is slip fit over the shaft, keylocked, and extends the entire...

SINGLE STAGE SPLIT CASE PUMPS Vertical Pump Features Coupling Alignment with true alignment is vital to long life and proper performance. To maintain proper coupling alignment, the mounting bracket is rabbet fitted to the motor. Mechanical Seals Standard construction includes carbon against Ceramic face for optimum hot water performance. Long life is also assured with 303 stainless steel metal parts and Buna-N elastomers. Bearing Protection Cast Iron Drip Rim Base Grease seals and water slingers are provided to protect the bearings from contamination. This important feature is also standard...

SINGLE STAGE SPLIT CASE PUMPS Range Charts Single Volute 3500 RPM Individual performance curves should be checked for final selection. For selections not shown on this chart, please refer to the factory. Power Frame No. 1 Power Frame No. 2 Power Frame No. 3 Power Frame No. 4 Power Frame No. 4A Power Frame No. 5A TOTAL DYNAMIC HEAD – FEET CAPACITY – GALLONS PER MINUTE Individual performance curves should be checked for final selection. For selections not shown on this chart, please refer to the factory. Power Frame No. 1 Power Frame No. 2 Power Frame No. 3 Power Frame No. 4 Power Frame No. 5...

SINGLE STAGE SPLIT CASE PUMPS Individual performance curves should be checked for final selection. For selections not shown on this chart, please refer to the factory. Power Frame No. 1 Power Frame No. 2 Power Frame No. 3 Power Frame No. 4 Power Frame No. 5 Power Frame No. 6B Power Frame No. 7 Power Frame No. 7A TOTAL DYNAMIC HEAD – FEET CAPACITY – GALLONS PER MINUTE Power Frame No. 5 Power Frame No. 6B Power Frame No. 7 Power Frame No. 7A Power Frame No. 1 Power Frame No. 2 Power Frame No. 3 Power Frame No. 4 TOTAL DYNAMIC HEAD – FEET Individual performance curves should be checked for...

SINGLE STAGE SPLIT CASE PUMPS Individual performance curves should be checked for final selection. For selections not shown on this chart, please refer to the factory. Power Frame No. 1 Power Frame No. 2 Power Frame No. 3 Power Frame No. 4 Individual performance curves should be checked for final selection. For selections not shown on this chart, please refer to the factory. Power Frame No. 1 Power Frame No. 2 Power Frame No. 3 Power Frame No. 5 Power Frame No. 6B Power Frame No. 7 Power Frame No. 7A Power Frame No. 4 Power Frame No. 4A Power Frame No. 5A

SINGLE STAGE SPLIT CASE PUMPS Pump Dimensions Notes – Apply to all models: • May not be used for all pump sizes in this power series. Consult individual dimension pages for final selection. † For motor and baseplate dimensions over 200 HP, refer to the factory. 1. Dimensions and weights are approximate. 2. Complete dimensions are available. 3. Not for construction purposes unless certified for approval. 4. Frame sizes shown are for open drip-proof motors only. 5. Add pump, base and motor weight for unit total weight. 6. Conduit box is shown in approximate position. Dimensions are not...

SINGLE STAGE SPLIT CASE PUMPS Pump Dimensions

SINGLE STAGE SPLIT CASE PUMPS Engineering Specifications Models 1820, 1810 and 1840 Split Case Base Mounted Furnish and install as shown on the plans ____ Right-hand (Left-hand) Fairbanks Nijhuis™ Model (Horizontal – 1820) (Vertical – 1810 Open Shaft) (Vertical – 1840 Flexible Coupled) type Split Case, Double Suction, Single Stage centrifugal pump, size ____x____x____ of bronze fitted (all bronze) (all iron) (stainless steel) construction. The pump shall be capable of delivering at design conditions a capacity of ____ GPM when operating against a Total Dynamic Head of ____ feet, with a...

Engineering Specifications Model 1820 Stuffing boxes shall be placed on both sizes of the pump centerline to seal the pump shaft. All packed pumps having a suction lift shall be provided with lantern rings connected to the pressure side of the pump by cored passages in the parting flange of the pump. The stuffing boxes shall be equipped with heavy, cast, split glands with extra length, for easy removal for packing inspection and maintenance. Pump and motor shall be mounted on a common heavy base plate of (steel with drip rim) (formed steel) (structural steel). Pump and motor must be checked...