Flexible Impeller Pumps
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Jabsco Pumps have serviced major engine builders globally for more than 70 years The Original Flexible Impeller Pump

Flexible Impeller Pumps 11 General Introduction Engine Cooling Introduction Pulley Driven Pumps Upgrade to Jabsco Cooling Pump Spares

11 Flexible Impeller Pumps SELECTION GUIDE Flow Pattern / Connection Type Fitting / Port Flange Mount

Palmer Lehman Chris- craft Caterpillar Selection Guide Flexible Impeller Pumps

11 Flexible Impeller Pumps SELECTION GUIDE Flow Pattern / Connection Type Fitting / Port Flange Mount Drive Gear Drive Gear Drive Gear Drive Gear

Selection Guide Flexible Impeller Pumps

11 Flexible Impeller Pumps General Introduction Jabsco original Flexible Impeller Pumps - Pedestal, Clutch & Engine Cooling How it works: When the flexible vanes again contact the eccentric cam they bend with a squeezing action which provides a continuous, uniform discharge of liquid. Flexible vanes create increased volume when leaving the eccentric cam creating a vacuum thus drawing in liquid, instantly priming the pump. As the flexible vanes rotate, the liquid is carried through the pump from the inlet to outlet port, each successive vane drawing in liquid.

Pressure Ranges • Versatile: The flexible impeller pump combines the priming feature of positive displacement type pumps with the general transfer ability of centrifugals. It will pump either thin or viscous liquids and can handle more solids in suspension than other types of rotary pumps. It operates at low or high speeds - can be mounted at any angle and pumps in either direction with equal efficiency. Standard Impellers • Self-Priming: Pumps instantly, with dry suction, lifts up to 10ft (3m); up to 25ft (8m) when wetted. Permits cleaner, safer installations. No foot valve required. • 1”...

11 Flexible Impeller Pumps Engine Cooling Introduction Keel Cooling In principle this is similar to a heat exchanger cooled system but raw water circuit and heat exchanger have been replaced by pipes attached externally to the vessel’s keel. Pipe bore and surface area must be adequate for effective dissipation of heat from the primary circuit to sea or river water. In some installations where, due to system pressure losses through keel pipes, cylinder block and exhaust manifold, the flow capacity of the centrifugal circulating pump is insufficient, a Jabsco pump may be used (flow capacity...

Safety Margins The raw water flow capacities indicated earlier are for diesel engine cooling systems and include a safety margin of some 30% to ensure adequate engine cooling under adverse operating conditions. As gasoline engines, unlike diesel engines, have a high heat rejection rate at idling speed, an increase in pumpflow capacity of some 10% at maximum rpm is recommended. While flow capacities can be affected by salt deposits or scale in pipes due to operation in tropical regions, seawater pollution or age and wear of pumps and systems in general, this is usually a gradual process with...

11 Flexible Impeller Pumps Engine Cooling Introduction Pump Selection Most proprietary marine engines are already fitted with specially adapted flange mounted Jabsco cooling pumps driven by gears or couplings of various descriptions. Diesel Engines Gasoline Engines Direct cooling: Increase diesel engine figures by about 10%. A belt drive from the crankshaft pulley will enable al most any standard foot mounted bronze Jabsco pump to be selected provided that the required cooling flow rate is obtained without operating the pump at excessive speeds (see also performance graphs). Global cooling...

Pump Drives Direct Drives Misalignment between pump and drive shafts is a common cause of pump failure. A flexible coupling is only “flexible” within limitations specified by the manufacturer. Excessive misalignment, particularly at high pump speeds, can cause noise, knocking, vibration, premature bearing failure, usually followed by pump leakage. Belt Drives The pump speed is determined by the engine pulley diameter and the need to maintain the pump pulley at a practical maximum size. Some engine crankshaft pulleys incorporate vibration dampening membranes resulting in large diameters at...

11 Flexible Impeller Pumps Pulley Driven Pumps Pulley Driven Engine Cooling and General Purpose Pumps The self priming Flexible Impeller Pump (FIP) is the industry recognized technology standard for leisure and work boat engine cooling. Being an original Jabsco, you are assured the highest grade bronze and stainless steels are used in keeping your engine at peak operating temperature. Operating in either direction, with flows up to 83 US gallons per minute (300+ lpm) and multiple port configurations FIP is ideally suited to wash down, circulation and fire duty applications on board or...

Pulley Driven Engine Cooling and General Purpose Pumps Jabsco pumps have serviced major engine builders globally for more than 70 years • Two single row ball bearings. • Two single row ball bearings • Self-priming up to 10ft (3m) vertical lift. • Self-priming up to 10ft (3m) vertical lift. 515/16” long x 3½” wide x 35/18” high 47/16” long x 41/8” wide x 313/16” high. Pump with Neoprene Impeller, Full Cam and Lip Seal. Pump with Neoprene Impeller, Full Cam and Lip Seal. Pump with Nitrile Impeller, Full Cam and Lip Seal. • Mechanical face seal. • Mechanical face seal. • Double-row ball...

11 Flexible Impeller Pumps Pulley Driven Pumps Pulley Driven Engine Cooling and General Purpose Pumps Original Jabsco Flexible Impeller Pumps are available with neoprene impellers for water (45-160°F, 8-70°C), and general purpose pumping and nitrile impellers which are ideal for oil based products (50-160°F, 10-82°C). Head pressures up to 26 psi or 60 ft. can be accommodated. For reduced flow, choose the half cam version. The choice of a mechanical seal extends pump 777 Series Bronze Pedestal Flexible Impeller Pump life. Do not pump gasoline or other flammable liquids. Do not run dry. For...