RW series Clogless impeller-fitted centrifugal pumps
DESCRIPTION RW pumps are centrifugal, monocellular, with axial suction and radial delivery. They offer two kinds of performance: - Horizontal on a frame - Vertical with a shaft and base plate A carefully studied design means that up to three different impellers can be fitted to one same model of pump (with channels, open or vortex), thereby resulting in a versatile and functional range adapted to each kind of liquid pumped. It is advisable to fit to the suction port, an inspection and cleaning flanged handhole, which is available as an option on request. APPLICATIONS The RW series has been designed to satisfy demands in the field of waste and loaded liquids. It is therefore highly suitable for: Paper mills Water for screenings Water containing pulp Cellulose, etc. Sugar mills and canning factories Thick soaked malt Water and cereal mixtures Vegetable waste, etc. Construction Cleaning tanks Water containing cement and fibres Untreated drainage Waste water and sewage, etc. Mining Fine and coarse silt Milk of lime Water containing coal and minerals Kaolin sludge Water containing earth, slime, etc. Chemical industries Chemical products containing dirt Chemical products containing glass (phosphates, etc.) Potashes Brines, bleaches, etc. EXTENT OF SERIES The RW Series by Bombas ITUR has a total of 28 different models, split into 14 sizes, some of which can be fitted with two or three kinds of impeller. Service limits: - Maximum flow:.......................700 m 3 /h - Maximum head:......................100 m.c.a. - Maximum casing pressure:..............16 bar - Maximum temp. standard performance.....120 ºC special performance......250 ºC CONSTRUCTION Voluted body with feet and flange connections DIN-2501, PN-16, with RF finish according to DIN-2526 form C. Projecting impeller with body wear ring. Special versions with cooling or heating chambers are also available. The support is of hardwearing construction, with one double row of ball bearings on the motor side, and another row of rollers on the pump side. These are standardised and calculated to have a working life of over 20,000 hours. Pumps with the a impeller have an axially adjusted support. Types of impellers Closed impeller with two or three channels (Impeller c ) For waste water containing solids and slimy liquids with suspended matter, which neither create gas nor contain fibres that could cause the appearance of braiding. Either two or three channels are used depending on the kind and size of pump. Open, multivane impeller (Impeller a ) For slightly dirty liquids that can also contain gas or air. Liquid outlets from the sugar industry, containing suspended matter, up to 6% in consistency (solid matter). Free passage impeller ( Vortex ) (Impeller v ) Liquids containing a wide variety of gases. Water containing solids, for spinning waste and mixtures that tend to cause the appearance of braiding. Impeller c (two or three channels) PUMP DENOMINATION Kind of impeller (c-a-v) Size of pump iimpeller a (open multivane) RW series Impeller v (of the Vortex type) 2
WATERTIGHTNESS OF THE SHAFT Based on the most common gasket-including constructions, 7 standardised variations ensure that the shaft is completely watertight. The use of one or another version depends on the characteristics of the fluid to be pumped. The seven standardised versions are: 1.- Gasket with casing and an orifice for external fluid. When the pump is operating in suction mode, the external fluid must be grease or another similar liquid compatible with that being pumped. For clean water, the connection can be made from the impeller. Loaded waters require the external injection of clean water. 2.- Gasket with casing, a base ring and an orifice for external fluid. For abrasive or highly loaded water, replace the first gasket ring with a base ring. The exterior clean liquid prevents the pumping from affecting the gasket. 3.- Gasket with casing and two orifices for exterior circulation. This device is used when the sealed fluid has not to come into contact with that being pumped. It has an inlet and an outlet to facilitate the circulation of the exterior liquid. 4.- Simple mechanical lock in keeping with DIN 24960 without external liquid, with subsequent washing. Plan API-11. It makes no difference whether the operation is functioning in suction or in load mode. This system is used for relatively clean liquids. Subsequent washing (quenching), if required, is available as an option with the corresponding connection on the locking cap. 5.- Simple mechanical lock in keeping with DIN 24960, with external liquid and subsequent washing. Plan API-32. This system avails of continuous circulation with clean external liquid. It is used for dirty liquids. Subsequent washing (quenching), if required, is available as an option with the corresponding connection on the locking cap. 6.- Double mechanical back-to-back lock. Plan API-54. A lock for abrasive, dangerous liquids etc. It is the external liquid that creates a barrier. It must be injected at a pressure higher than that existing behind the impeller and must be compatible with the liquid being pumped. 7.- Double mechanical tandem lock. Plan API-1 with posterior barrier fluid. A lock for abrasive, dangerous and especially toxic liquids. It is the external liquid that creates a barrier. This liquid has to be injected at low pressure, but does not have to be compatible with the liquid being pumped. An alarm system can be fitted to the barrier circuit so that, should the first lock leak, causing a rise in pressure within the circuit, the alarm would go off and in turn oblige the pump to stop. 1.- 2.- 3.- 4.- 5.- 6.- 7.- 0.- Miscellaneous Other special devices are also available as an option, depending on the fluid to be pumped. Consult our Technical Department. 3
STANDARDISED MATERIALS OPERATING CODE (*) Ref. Part 1600 GG-25 1601 MIXED 1602 MISTINOX 1603 BRONZE 1604 NODULAR 1605 1612 MISTIBRAS 1607 CA6NM 1608 AISI-329 1609 L 1610 CN7M 1621 IMPBRON 1622 EJENOX 1112 Pump body GG-25 RG-5 GGG-40 GG-25 CA6NM GG-25 2220 Impeller GG-25 GSnBz10 GSnBz10 GG-25 1 Body wear ring GG-25 RG-5 RG-5 GG-25 CA6NM AISI-329 L A743CN7M SN-10 GG-25 2100 Pump shaft F-114 F-114 2450 Renewable bushing 3130 Bearing support AISI-431-B GG-25 904 L * For other materials (A216-WCB, Monel, Hastelloy, NI-Resist, etc.) consult our Technical Dept. INTERCHANGEABILITY OF PARTS The components appearing in the left-hand column of the table are standard and can be used on any model of pump bearing the same letter as the component in question. The advantage of this standardisation lies in that a minimum stock of parts guarantees the maintenance and fast repair of many different models of pump. Example: the shaft of pump 50/200 is the same as it is on pumps 85/ and 80/200. Ref. Description TYPE OF PUMP 50-160 50-200 65-200 65-315 80-250 80-400 100-250 100-315 100-400 125-150-315 150-200-315 200-400 1221 3134 2100 2450 2914 3130 3011 3012 3260.1 3260.2 3132 4120 4130 4134 Gasket-holding cap Support foot Shaft Renewable bushing Impeller-fixing nut Bearing support Front bearing Rear bearing Front bearing cap Rear bearing cap Support casing Stuffing box Gasket Casing ring A B B C D E F C E G H G H I A B C D E F D G F H I J H H A B B C D E D C E F G F G E TECHNICAL SPECIFICATIONS Item TYPE OF PUMP 50-160 50-200 65-200 65-315 80-250 80-400 100-250 100-315 100-400 125-150-315 150-200-315 200-400 Max. impeller ø (mm) Max. r.p.m. Cut-off impeller (mm) Max. r.p.m. TempºC standard performance TempºC with cooling chamber Momentum (kg.m 2 ) Weight of the pump (kg) c Impeller pitch (mm) a v Maximum torque (kg.m) 169 ø 209 ø 209 ø 320 ø 260 ø 404 ø 260 ø 320 ø 404 ø 504 ø 320 ø 504 ø 320 ø 404 ø 3. 3. 3.000 2.400 2.600 1.900 3.000 1.900 1.900 1. 1.800 1. 1.800 1.800 260 ø 230 ø 435 ø 435 ø 3.000 3.000 1.800 1.800-30 < TºC < +120 TºC < +250 0,0313 0,064 0,095 0,148 0,215 1,1 0,27 0,75 1,23 2,62 0,72 2,85 0,867 2,06 42 74 79 130 102 231 114 185 240 370 240 385 290 375 34 34 46 42 50 46 60 54 50 50 88 60 85 80 30 25 36 28 35 65 57 78 (1) (1) (1) (1) (1) (1) 8,76 20,43 20,43 48,65 20,43 107 48,65 20,43 107 214 107 214 107 214 NOTE.- (1) The design of the Vortex V version lets all solids through, no matter what the physical width of the impeller. (2) The data given in this table corresponds to material operating in GG-25 (code 1600), with water at 20ºC and a specific weight of kg/cm 3. For other working conditions, consult our Technical Department. 4
EASY TO MAINTAIN The careful design of the elastic coupling with spacer permits fast and easy access to the pump interior without having to disconnect the pipes or the motor. Once the spacer has been released, it is possible to dismantle the unit comprising the support, the cap and the impeller, always leaving the body and the motor fixed to the frame. The suction and delivery pipes will remain flanged. DIAGRAMS FOR SELECTING THE MODEL The following diagrams show the general performances of flow and head at 950, 1,450 and 2,900 r.p.m. corresponding to the 14 sizes of pump with a closed impeller of two or three channels, type c. For more detailed information on output, absorbed power and required NPSH, ask for our particular curves for each pump with its corresponding impeller. This therefore makes it easy to maintain pumps that require attention more often than normal when working with dirty liquids. 5
PUMP BREAKDOWN Ref. 1112 1221 1 2100 2220 2450 2914 3011 3012 3130 3132 3134 3260.1 3260.2 3854 3855 4120 4130 4134 Name of the part Upper pump body Gasket-holding cap Body wear ring Shaft Impeller Renewable bushing Impeller-fixing nut Rear bearing Front bearing Bearing support Support casing Support foot Front bearing cap Rear bearing cap Oil-filling cap Level adjuster Stuffing box Gasket Internal ring Section plan of pump RW with channel impeller, c type, and gasket. Detail with Vortex, v type, impeller. Detail with open, multivane, a type impeller Support with axial adjustment 6
DIMENSIONS TYPE OF PUMP Flanges Pump data 50/160 65 50 100 385 50/200 112 65/200 125 80 65 65/315 140 530 80/250 125 80/400 100 80 670 100/400 100/250 100/315 125 100 140 530 670 125/ 150 125 160 720 150/315 180 670 150 150 150/ 160 720 200/315 200 670 200 200 200/400 180 720 Foot data Shaft end Handhole DNs DNd a f 1 h 1 h 2 b m 1 m 2 n 1 n 2 n 3 s 1 s 2 g 1 g 2 w y d 1 l 1 t 1 u 1 p p 1 180 160 200 50 100 70 265 212 180 225 65 225 280 400 315 280 225 250 280 355 315 375 160 355 80 120 435 355 280 315 355 450 400 315 110 400 NOTE: Pumps ITUR operates on a policy of continuous improvement to the development of its models. Modifications may therefore be made to the specifications without prior warning. 110 14 14 14 14 16 140 18 18 18 400 100 200 150 550 450 140 23 18 450 355 125 180 95 320 250 20 24 22 24 22 24 8 12 8 12 285 100 24 32 50 80 26,9 35,3 8 10 370 42 110 45,1 12 120 32 80 35,3 10 48 51,5 14 370 140 42 515 160 515 515 48 60 48 60 48 60 202 80 120 110 45,1 12 80 252 51,5 14 120 140 64,2 18 110 51,5 14 150 140 64,2 18 110 51,5 14 352 200 140 64,2 18 7
Horizontal operation, on a frame with an electric motor and elastic coupling with a spacer. Vertical operation, with a shaft, base plate and delivery piping. RWCP Series. BOMBAS ITUR, S.A. P. O. Box, 41 20800 ZARAUTZ (Gipuzkoa) SPAIN Tel.: +34 943 899 899 Fax: +34 943 130 710 E.mail: comexp@itur.es www.itur.es CI-RW/A140-5 (04/03)