A back pullout configuration provides easy access to interior areas without disturbing piping connections. The lnn series of doublesuction axially split pumps is available with more than 200 impeller and volute combinations. Double suction vertical pumps delivering lownpsh performance and extended service life model vids wherever you are, we re there too. A horizontal, doublesuction pump may be fitted with a 90deg elbow mounted on the suction nozzle in such a way that the line leading to the elbow is parallel with the axis of the pump shaft see figure 1. Therefore, there will be two suction and two delivery pipes for double acting reciprocating pump as shown in following figure. Impellers can be either single suction or double suction. Xylems exc single stage, double suction split case pump as a replacement to the legacy ac series 8100, 8300 and 9100 pump, xylems exc split case pump offers a broader hydraulic range with flows that exceed 57,000 gpm and head over 800 feet. Designed and manufactured by the global leader in hydronic pump technology, the new series ehsc double suction pump provides engineers, contractors, and building owners a more powerful, serviceable, and efficient solution for a wide range of critical hvac applications. Pump products is a series vsx double suction split case pumps performance curves distributors with great reputation for more than 20 years. When the liquid sweeps round the elbow, it is centrifuged out towards the long radius and feeds the eye on one side of the impeller.
Doublesuction, basemounted series hscs pumps are available in 8 through 14 sizes. When properly installed and when given reasonable care and maintenance, centrifugal pumps should operate satisfactorily for a long period of time. Pump performance curves show this interrelation of pump head, flow and efficiency for a specific impeller diameter and casing size. On high suction lifts or on applications handling high percent solids, the suction piping should be one or two sizes. Figure 4 shows simplified diagrams of single and doublesuction impellers. Combined with double suction impeller for axial balance, the 3410 is designed for long life, low maintenance.
Sep 23, 2019 water will be acting on both side of the piston in case of double acting reciprocating pump as displayed here in following figure. This pump configuration exceeds the characteristics of two smaller single suction pumps or one larger single suction pump, offering superior performance in terms of efficiency, maintenance and footprint. Suction and discharge nozzles are cast of 250 psi dimensions and all models feature a 250 psi case working pressure. Doublesuction, basemounted series hscs pumps are available in 2 through 10 sizes. A singlesuction impeller allows liquid to enter the center of the blades from only one direction. Full compliance with api 610 specified nozzle loads full compliance with api 610 vibration and shaft runout requirements double casing covers offer easy maintenance. The hs horisontal split case is the giant in the grundfos product range. This means that shorter pump lengths can be manufactured. Seals are easily dismountable, which makes replacing and fitting up additional seals easy. We typically recommend a double suction pump design for hvac applications around 2,000 gpm or an 8 pump size. Split case pumps xylem applied water systems united states.
The torishima cdm is a horizontal axially split doublesuction pump used in a wide range of applications such as seawater desalination plants, power plants, water and waste water, water transmission and irrigation etc. Smn axially split casing double suction pump abs pdf. Double suction impellers impeller store the proven. Goulds 3400 the most complete line of double suction pumps in the industry small capacity 3408a flows to 8,000 gpm capacities to 6,000 gpm 1,363 m3h heads to 570 feet tdh. In this study, a fast approach to npshr prediction was used to perform a multiobjective cavitation design optimization.
A single suction impeller allows liquid to enter the center of the blades from only one direction. The central difference between a single and double suction pump is the latter has an impeller designed to draw flow through it from both sides. The thrusts produced are offset by the counterrotating arrangement of the impellers, so these pumps run without axial thrustgiving a properly maintained pump a service life of 10 to 15 years, andritz ritz claims. Sulzer pumps is a leading global supplier of reliable products and. Goulds model 3996 inline process pumps goulds pumps pdf. Dpas pumps are double suction, horizontal split case pumps. The dsl pumps are singlestage, doublesuction, vertical, centrifugal pumps. Double suction centrifugal split case pumps dppumps. Doublesuction pump article about doublesuction pump by. The primary difference between single suction pump and. The design of the suction side provides for a perfect flow, and the inlet is placed in line with the outlet. Its compact doublesuction impeller design reduces npshr and helps. User industry standards, specifications and references have been incorporated in the rotating element design, with particular emphasis on ease of maintenance. Kpkpv double suction split case pumps technical data flow, q.
The pump is subject to this declaration of conformity as a stand. A doublesuction impeller allows liquid to enter the center of the impeller blades from both sides simultaneously. It combines double volute design with high flow and inline pipe connection. The andritz asph pump is a doubleflow, singlestage, axial split case pump, specially developed for the high strength and long lifetime requirements in district heating networks and for other applications with hightemperature media. Between bearing, axially split, single stage, double suction pump. Double suction, between bearing, split case pumps see figure 3 are the second most popular centrifugal pump configuration, second only to the more common end suction, radial split design. Available in over 50 different sizes and in vertical configuration, they provide broad hydraulic coverage with excellent efficiency over a wide range of flows and head. Double suction pump 16 this is not a pump curve total head in feet foot lbs per lb water pumped. Proven performance and longevity, balanced doubleentry impeller design, and modular components are just a few of the ta pumps attributes. The durability of the horizontal split case pumps design allows the pump to be used for very large water flows in excess of 5000 gpm as the pump casings are often heavier and designed to handle higher working pressures, moreover, the design of impeller between bearing and since the water enters the two sides of the impeller double suction, these pumps can withstand the large.
Built upon the proven heritage of the sierbath twinscrew positive displacement pump, the tsp continues to provide the same pulsefree flow, high suction lift and selfpriming capabilities of its predecessor. The bearing housing mounts directly to the pump volute to save space and provide proper alignment. Since impellers of more than one diameter can usually be fitted in a given pump casing, pump curves show. Figure 4 single suction and double suction impellers. Externally flushed mechanical seals are standard features on this series. Goulds split case pumps have many applications in the power generation market. The design is based on the companys hdm heavy duty mining technology, which uses the concept of a double suction pump. Different types of double suction hvac centrifugal pumps when it comes to selecting a base mounted double suction pump, there are 3 configurations to. The torishima cdm is a horizontal axially split double suction pump used in a wide range of applications such as seawater desalination plants, power plants, water and waste water, water transmission and irrigation etc.
Pdf analysis of the reasons of double suction centrifugal pumps. It is of the volute type with double suction, split on the horizontal centerline with the suction and discharge nozzles cast integral with the lower half. Zpp doublesuction axially split singlestage centrifugal pumps are used for demanding highcapacity industrial applications to ensure process reliability, high. The principal reasons for the popularity of this betweenbearing configuration include.
Double suction and threedimensional impeller gives low npsh requirements and high efficiency. Series vsx double suction split case pumps performance curves by pump products. Pump shall be furnished with single, double balanced. Api 610 bb2 radially split, double suction process pump 4 dualvolute centerline supported casing, combined with a stiff shaft design, ensures. Designed for demanding applications where npsha is limited, the flowserve apkd double case. A fullcircumferentialflow doublesuction pump having impellers on respective opposite ends of the shaft of a motor, with an annular space or flow passage defined around the motor. Model 3420 splitcase pump in service at an electric utility plant in the bahamas. Pdf on nov 1, 2017, witold lorenz and others published analysis of the reasons of double suction centrifugal pumps failure find, read and.
This is the pump to use when your client expects to own the building for a long time and repair staff is at a premium. Between bearing, axially split, single stage, double. Sulzer pumps zpp double suction pumps brochure pdf. Bell and gossett designed their 175 psig working pressure end suction e1510 and double suction pumps including the ehsc and vsx with internally flushed mechanical seals. The vertical doublesuction pump has an outer cylinder and a motor housed in the outer cylinder. The suction and discharge piping should be equal to the pump suction and discharge port size. Between bearings, axially split, singlestage, double. Centrifugal refrigeration machines and pump bases may be t or l shaped. Such items as pump design, suction piping design, suction and discharge pipe size and pipe supports must all be carefully considered. In addition, the optimal design of their casing and rotor parts has reduced their pump weights. Pump curves relate flow rate and pressure head developed by the pump at different impeller sizes and rotational speeds. Between bearings, axially split, singlestage, doublesuction pump.
A double suction impeller allows liquid to enter the center of the impeller blades from both sides simultaneously. The design of a piping system can have an important effect on the successful operation of a centrifugal pump. Series hscs large double suction centrifugal pumps xylem. The pump is subject to this declaration of conformity as a standalone product. The motor has a stator and a rotor rotatably disposed in the stator.
Ta series single stage double suction horizontal split case pump water circulation. This splitting or double suction design eliminates the axial. Packed pumps or internally flushed mechanical seals. Series hscs small and medium double suction centrifugal pumps. The dsl pumps are singlestage, double suction, vertical, centrifugal pumps.
The centrifugal pump operation should conform to the pump curves supplied by the manufacturer. Cdm horizontal axially split doublesuction pump cdmv. Xylems exc single stage, double suction split case pump. Z22 double suction axially split singlestage centrifugal pumps are used for demanding highcapacity industrial applications to ensure process reliability, high. Double suction, basemounted series hscs pumps are available in 2 through 10 sizes. Klosson, of kenmore, york, assignor t0 buffalo steam pump 8 company, of north tonawanda, new york double suction centrifugal ipump application filed january 3, 1930. A single suction impeller allows liquid to enter the center of the. Pdf a double suction centrifugal machine has been studied, both experimentally and numerically, operating as a pump and as a turbine.
Double suction vertical pumps wherever you are, delivering. When properly installed and when given reasonable care and maintenance, centrifugal pumps should. Z22 double suction axially split singlestage centrifugal pumps are used for demanding highcapacity industrial applications to ensure process reliability, high efficiency and low operating costs. Water will be acting on both side of the piston in case of double acting reciprocating pump as displayed here in following figure. In order to read and understand the pump curves, it is very. Add to this the advanced double suction impeller and the result is high efficiency and low npshvalues. The pump is a centrifugal, single stage, double suction type. Axial split case double suction pumps hads neptuno pumps. Zpp double suction, axially split singlestage centrifugal. Pdf flow analysis for a double suction centrifugal machine in the. The primary difference between single suction pump and double suction pump 20909. This double suction design splits the flow inside of the pump and sends 50% of the water through two eyes.
Series vsx double suction split case pumps performance curves. Doublecase, doublesuction vertical pump complementary pumps designed for demanding applications where npsha is limited, the flowserve apkd doublecase vertical pump offers extraordinary hydraulic performance in a competitively priced package. Z22 double suction axially split single stage centrifugal pump. Add to this the advanced doublesuction impeller and the result is high efficiency and low npshvalues. Figure 4 shows simplified diagrams of single and double suction impellers. Centrifugal pumps use the centrifugal force principal of accelerating the liquid within a rotating. Between bearings, axially split, singlestage doublesuction pump the lnn series of doublesuction axially split pumps is available with more than 200 impeller and volute combinations. With over 140 models and a wide range of material options, exc pumps canread more. The kpvs splitcoupled split case pump reduces the mechanical space footprint with its vertical motor arrangement, provides easy access to seal and internal components without ever needing to remove the motor, and needs no field alignment.
Bronzefitted construction with a maximum working pressure of 175 psig. Dsl vertical inline double suction centrifugal pump. Cdm horizontal axially split doublesuction pump 2001400dia 1. Doublecase, doublesuction vertical pump flowserve corporation. Goulds 3410 small capacity double suction pumps goulds pumps goulds 3410 small capacity double suction pumps 1. Api 610 bb2 radially split, double suction process pump. Series vsx space saving double suction centrifugal pumps. The head remains constant the most common type of multi suction design in centrifugal pump engineering is a double suction pump whose impeller pair is arranged back to back on the pump shaft see backtoback impeller pump. Each and every pump is rigorously tested before shipment, and regardless of where in the world our pumps are made, the commitment to quality is unrelenting. Pdf on nov 1, 2017, witold lorenz and others published analysis of the reasons of double suction centrifugal pumps failure find, read and cite all the research you need on researchgate. Series ehsc double suction centrifugal pumps xylem us. Ta series single stage double suction horizontal split. Removal of the upper casing gives complete access to the.
Pdf analysis of the reasons of double suction centrifugal. Selecting the right model and accessories is simple with our intellitronic x selection software. The energy consumed by a large pump to transport the water has a dominant role in pumping system and hence the efficiency of the pump is of great concern to both manufacturer and customer in large size pumps. Main applications smn double suction axially split pumps are used to pump water in municipal installations and in general industry. Ta series single stage double suction horizontal split case. Closedend steel baseplate with full seam welds forread more. The fullcircumferentialflow double suction pump shown in figs. Vibration isolation manufacturer shall furnish integral structural steel bases. Our standard duplex stainless steel astm a890 grade 3a is stronger, harder and has higher pitting corrosion resistance than main parts duplex stainless steel design cast iron design stainless steel which is conventionally used for double suction pumps. Since the upper cover of the pump is removable, all internal components can be easily replaced without disassembling the pump from the piping. The pump covers a wide range of application areas and continuously provides efficient and reliable performance due to its robust design. The new kpvs also includes all the benefits of a double suctiondouble volute splitcase design reduced.
Hsc is single stage, axially split volute casing pump with double suction impeller, for hor izontal and vertical installation. This arrangement serves to balance the axial thrust. Between bearing, axially split, single stage, double suction pump 4 pump casing features double volute suction and discharge flanges in ansi, din or iso configurations heavy duty integral mounting feet upper case lifting lugs seal chamber features independent cast housing for packing or mechanical seal four bolt gland. As a replacement to the legacy ac series 8100, 8300 and 9100 pump, xylems exc split case pump offers a broader hydraulic range with flows that exceed 57,000 gpm and head over 800 feet. This manual covers the installation, operation and maintenance of patterson pump horizontal split case pumps. Jun 26, 2017 however, these bearings can afford to be smaller than single suction pumps simply because there is better balance across the shaft of a double suction pump. As a result, they require minimal maintenance but are easy to service when needed.
In double suction pumps the total flow rate is distributed over several impellers arranged on a pump shaft. Tc series singlestage, double suction vertical split case pumps. Double suction centrifugal split case pumps installation and operation instructions series. This is a robust and yet highly efficient pump that has been developed to meet customerspecific requirements. Small capacity, single stage, double suction pumps designed for a wide range of industrial, municipal, and marine services.
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