RDRN, RDRX, RDRB, RDRBJ Gear Pump

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.

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.

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.

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.

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.

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.