RDRN, RDRX, RDRB, RDRBJ Gear Pump

Description

Proven Performance & Operational economy are prime consideration while evaluting your pumping requirement. When it comes to handling viscous or semiviscous liquirds, 'ROTODEL' rotary gear pump is an obvious choice for the very reasons.

'ROTODEL' rotary gear, twin gear & screw-gear pumps are welknown, widely accepted pd pumps in all th industries for it's efficient performance, operational reliability, compact design & noiseless operation. These pumps have outclassed convenational gear pump & has also broken myth about screw pump offering better overall performance at considerable reduced cost.Many imported gear & screw pumps are replaced with 'ROTODEL' pumps in power stations, steel plants, refineries, oil installation on navy vessels & cargo ships.

Popular range of 'RDNXJ' series `ROTODEL' rotary screw-gear pumps are re-designed & re-engineered to offer further simplicity with added reliability meeting international standard like API, JIS, DIN & above all, the growing expectations of enlightened customers. New 'RDRN' series twin gear pump now offers enlarged capacity range with option of self or independently lubricated jacketed or non-jacketed construction with all sizes designed to run at synchronous speed of 4-pole primemover to further reduce the overall cost of the pump set..

It will be a wise decision to go for `ROTODEL' rotary twin gear pump even If it amounts to scrapping exisiting Pump at your present installation.

Advantages

• Herrigbone rotos design eliminates side thruts.
• Modified tooth profile enhances the tooth life.
• Floating gear-design ensures uniform load distribution.
• Low-leakage path by design improve volumetric efficiency.
• Extra thick shaft reduces bending effectively.
• Sleeve on shaft make maintenance economical & easy.

Dimension

Pump Motor Coding
Sign # Indicates Pump Size 5-short, 6-medium, 7-long
Sign @ Indicates Pump Type 0-RDRB, 1-RDRBJ, 2-RDRN, 3-RDRNJ, 4-RDRX, 5-RDRXJ
Sign * Indicates Motor Type W-NON-Flame Proof X-Flame proof motor

Size & Model	Dimensions																					Weight Bp-cou pump Bp-cou in Kg
	Overall						Mounting										Shaft			Flange
	A1	J A	J1	L1	K1	F1	B C	S S1	E F	H I	H1	T1 T	E1	C1	B1	I1	D R1	K L	P Q	M N	G R
1/2" 50 SML	503 538 538	122 239	262 283 283	500 525 525	145 170 170	125 130 130	80 100	8 15	91 150	80 69	158 163 163	75 10	37 36 36	340 365 365	112 125 125	147 152 152	11.5 4	22 30	4 13	16 60	89 4	11.5 8.00 12.00
1" 100 SML	570 570 620	136 271	288 288 315	600 600 650	145 145 180	139 139 146	90 110	10 15	100 160	90 74	168 168 175	75 10	26 26 26	360 360 410	120 120 140	151 152 159	15 4	25 30	5 17	16 79	108 4	12.2 14.0 13.1
1.1/2" 150 SML	667 697 742	160 318	320 328 353	625 750 750	165 205 230	165 163 175	105 130	10 15	119 180	100 80	180 178 190	75 12	3 30 26	375 500 500	130 170 190	160 158 170	21 4	25 40	6 23.5	16 98	127 4	14.0 22.5 18.00
2" 200 SML	738 783 853	174 359	340 353 398	775 800 800	210 230 256	177 177 197	110 150	12 15	133 200	112 90	190 190 210	75 14	50 65 50	525 550 600	170 190 216	168 168 188	24 4	39 50	8 27	19 121	152 4	17.5 28.00 20.8
2.1/2" 250 SML	842 913 953	200 419	377 398 398	800 900 950	249 255 255	203 203 203	130 160	15 15	163 220	132 106	204 210 210	75 15	35 50 50	550 650 700	205 216 216	184 184 184	27 4	40 55	8 30	19 140	178 4	18.5 43.00 22.5
3" 300 SML	1015 1113 1113	240 481	451 528 528	1050 1100 1100	287 304 304	243 243 243	160 220	18 19	168 240	160 131	263 263 263	100 22	84 75 75	750 800 800	240 254 254	234 234 234	32 4	49 60	10 35	19 152	190 4	22.0 59.00 33.00
4" 400 SML	1186 1231 1296	274 554	548 548 568	1200 1250 1300	315 310 330	277 277 277	180 270	18 19	189 280	180 145	283 283 283	100 25	58 58 90	800 900 900	265 254 279	248 248 248	37 4	54 65	10 40	19 190	229 8	40.0 82.0 47.2
5" 500 SML	1292 1357 1447	293 615	603 313 673	1350 1400 1400	300 365 380	306 296 296	200 280	19 22	215 300	200 160	338 328 328	125 25	55 125 116	950 1000 1000	254 300 318	298 288 288	47 4	60 85	14 50.5	22 216	254 8	58.0 150.0 50.5
6" 600 SML	1432 1608 1608	343 690	643 728 728	1500 1650 1650	305 420 420	351 346 346	220 350	20 22	215 340	225 178	358 353 353	150 25	183 137 137	1100 1150 1150	245 356 356	311 306 306	52 4	80 95	16 56	22 241	279 8	50.5 175.0 76.0
6" 600 SML	1667 1882 1882	357 749	778 853 853	1650 1800 1850	430 480 530	360 406 390	380 240	22 22	230 360	250 200	403 433 433	150 28	136 126 126	1150 1350 1350	356 457 457	353 383 383	57 4	81 100	16 59	22 241	279 8	77.7 190.0 87.00

Pump Characteristics

Gear pump is a rotary positive displacement pump with positive pressure characteristics. The capacity of the pump varies directly with speed but remain constant against pressure, however due to running clearance between the casing & impeller some liquid always by-passes to suction causing sleep, which depends upon the differential pressure, viscosity of the liquid & ofcourse the workmanship. The pumps are capable of handling any vcosity, the sleep reduces with viscosity but the viscous power increases. The punp has a self-priming capability however some net positive suction head (NPSH) is always required to avoid cavitations depending upon the viscosity of the liquid to be pumped & the pump speed.

Internal power losses

The internal power losses in rotary pumps are of two types. The mechanical losses is the power necessary to overcome frictional drag of all the moving part within the pump While viscous losses is power requited to overcome fluid viscous drag & shearing action of the fluid, this can be computed from the graph on the opposite side.

H.P. calculation

The break horse power required to drive a rotary pump is sum of the theoretical HP & internal losses. The theoratical power is the actual work done in moving the fluid from inlet port to out let pressure condition & is product of Constant C=0.037, Capacity in cub. Mt./hr. & Pressure Kg/Sq. Cm or Constant=2.39, Capacity in us GPM & Pressure in PSI.

Pump Selection & uses

The bush bearing type of pump can be used for clean viscous liquid having sufficient lubricating value such as clean tube oil, Vegitable oil, Fish & Animal oil, Gear oil, Glycerine Hydraulic oil, Honey,ASMI & SAE lubricating oil for intermittant duty. However for continues duty pump with needle roller bearing in 'RDRN' series should be selected. For liquid having low viscosity,poor lubricating values or Containing dirts or impurities such as Crude oil, Dirty lube oil, HSD,Kerosene,LDO,Paints, Sugar solution, Turpentine, Varnish, WoodPulp. Pump with independently lubricated bearing should be selected. For liquid which tends to solidify at room temperature such as Ashphalt, Bituman, Fumace oil, Tar, Cellulose, Starch, LSHS, HPS, Molasses, Naptha, Phenol resin, RFO, Silicate, Soap solution,Viscous,Wax etc. Jacketing constructions hould be selected to facilitate the heating or the pump by steam or thermic fluid.

Inspection & testing

All Pumps are individialy tested for its performance as per JIS B-8312-1976. Third party inspection is also offered to following agencies with whom we are already registesed as an approved supplier of these pumps.

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