Rotary Gear Pump Type RDMNS

General

ROTODEL Rotary gear pump type RDMNS is all SS, simple four piece construction pump specially designed to handle thinner or thicker & even corrosive liquid having lesser or no lubricating value. The SS-316 herring bone Rotors runs on Teflon coated dry running DU bush bearing supported on bronze wearing plate, placed inside the pump casing, alternatively graphite/bronze wearing plate cum bushes are also provided for heavier viscous liquid application. The stuffing box is fitted with Z-pack sealant with provision to fit mechanical shaft Seal. The pump is provided with add-on type pressure relief valve.

  • Pump Body CF8
  • Front Cover CF8
  • Back Cover CF8
  • Gland Cover CF8
  • Rotar Gear SS-316
  • Stator Gear SS-316
  • Rotar Shaft EN-57/SS-430
  • Stator Shaft EN-57/SS-430
  • W.Plate - Bronze/Graphite
  • Bushes Teflon Coated DU
  • Shaft Seal - Z Pack/Mech. Seal
  • Key SS-316

The Hydraulic HP should be calculated by multiplying the unit HP with the duty point pressure, the viscous horse power of appropriate viscosity should be added to this from above chart. Margin for R.V. operation & Safety margin should be provided brfore fixing the drive HP. All model of RDMNS series are basically design to run at 1440 RPM up to viscosity of 200 CST however in higher sizes above 2" the pump speed is required to be reduced with increase in viscosity for this refer viscosity speed curve or consult the works. Whir reducing the speed, the pump shaft should not be loaded with heavy gears or pulley use bearing block to take up such load.

Material of Construction

Sr.
No.
Description Material Qty.
01 Pump Body S.S. 316 01
02 Front Cover S.S. 316 01
03 Back Cover with R.V. S.S. 316 01
04 Seal Cover S.S. 316 01
05 Comp. Flange S.S. 316 02
06 Rotor & Stator Shaft S.S. 431 1+1
07 Rotor & Stator Gear S.S. 316 2+2
08 W/P Cum Bush Bronze 04
09 Shaft Sleeve S.S. 431 04
10 Teflon Packing Teflon 02
11 Shaft Seal M. Seal 01
12 Ad. Screw Lock Nut S.S. 316 01
13 Relief Valve Piston S.S. 431 01
14 Relief Valve Spring Spring Steel 01
15 R.V. Adjusting Screw S.S. 316 01
16 Lifting Hook M.S. 01

Dimension

RDMNS-SERIES.jpg
Pump
Model
RDMNS
Port Size
X-BSP/NPT
Capacity
at 1440 RPM
Wt. of Bare Pump set in KG.
M3/Hr.
RDMNS-075 S 3/4" X 3/4" 0.75 06
M 1.00
RDMNS-100 S 1" X 1" 1.80 08
M 2.25
RDMNS-125 S 1 1/4" X 1 1/4" 3.60 13
M 4.50
RDMNS-150 S 1 1/2" X 1 1/2" 6.00 18
M 7.50
RDMNS-200 S 2" X 2" 9.00 26
M 12.00
RDMNS-250 S 2 1/2" X 2 1/2" 15.00 37
M 20.00
RDMNS-300 S 3" X 3" 25.00 67
M 30.00
RDMNS-400 S 100 NB 36.00 80
M 45.00
RDMNS-500 S 125 NB 60.00 90
M 80.00
RDMNS-600 S 150 NB 100.00 100
M 120.00
Pump
Model
RDMNS
Pump Dimensions
Over All Mounting Shaft
A F F1 C1 H2 B C M N E T D1 H H1 ØD L L1 P Q
RDMNS-075 204 80 110 126 115 50 32 80 55 110 12 Ø12 80 69 Ø12 26 - 04 13
RDMNS-100 232 90 120 140 130 60 40 90 70 120 12 Ø12 90 74 Ø15 29 38 05 18
RDMNS-125 283 110 150 168 150 75 60 110 90 138 12 Ø12 100 80 Ø21 34 45 06 24
RDMNS-150 315 115 155 187.5 164.5 80 65 115 95 155 15 Ø15 112 89.5 Ø24 40 55 08 27
RDMNS-200 351 130 170 210 192 95 75 130 112 172.5 15 Ø15 132 106 Ø27 44 60 08 31
RDMNS-250 429 140 180 259.5 225 100 115 140 158 202 20 Ø19 160 131 Ø32 53 75 10 37
RDMNS-300 511 170 220 291 260 130 140 170 180 221 25 Ø19 180 145.5 Ø37 65 85 10 41
RDMNS-400 580 190 240 344 290 140 155 190 205 266.5 25 Ø19 200 160 Ø47 65 100 14 52
RDMNS-500 645 220 270 376 325 170 195 220 245 278.5 25 Ø22 225 179 Ø52 82 100 16 57
RDMNS-600 690 240 290 402 360 190 225 240 275 264.5 28 Ø22 250 199.5 Ø57 90 110 16 61

Uses

RDMNS Pumps are used for handling thinner liquid at moderate pressurizing viz. foam pressurizing application for fire fighting, high pressure coolant transfer application for machine tools, light fuel pressurizing application or boiler & burners, heavy viscous liquid transfer application such as Molasses, Magma, Soap stock, Tar, Bitumen, Paints, Varnish, Crude oil etc.


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