Rotary Triple Twin Gear Pump Type NDX

Overview

Size From 5" to 12" NB (Flanged to ASA 150 class), Capacity, From: 80M3/hr to 550M3/hr, Pres-up to 11Kg./Cm2, Viscosity up to 1,00,000 - cst, Temperature - up to 110ºC

  • Compact
  • Low Noise
  • Economical
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MOC

01 Pump Body 1 C.I.Gr.-20/CS 08 Impeller Gears 4 EN-8 BS 970 15 Bush Bearing 1 Bronze
02 Front Cover 1 C.I.Gr.-20 IS 210 09 Wearing Plate 4 LT - Bronze 16 R.V. Body 1 C.I.Gr.-20/CS
03 Back Cover 1 C.I.Gr. -20 IS 210 10 Needle Roller Brg. 8 IKO-INA 17 Relief Valve Piston 1 En-8 BS 970
04 Oil Seal Cover 1 C.I.Gr. -20 IS 210 11 "V" Seal/Me. Seal 8 Viton/Burg. 18 Spring 1 Spring Steel
05 Bearing Cover 2 C.I.Gr.-20 IS 210 12 R.H. & L.H. Timing Gear 1+1 EN-353 H & G BS 970 19 R.V. AD Screw 1 En-8 BS 970
06 Rotor Shaft 1 EN-9 H & G BS 970 13 Pinion & Reduction gear 1+1 EN-353 H & G BS 970 20 Flushing Wheel 1 En-8 BS 970
07 Stator Shaft 1 EN-9 H & G BS 970 14 Pinion Supp. Ball Brg. 2 SKF 21 Washer 3 En-8 BS 970

Pump Model - Size - Capacity & Dimensions

Pump
Model
& Size		 Designed
Capacity
at 960. RPM
Qd M3/hr		 Coefficient of Impeller Size Weight
of Bare
Pump
in KG
Slippage
Cs		 Viscouse
Power Cv		 Dia F/W
NDX-500
5" X 5"		 S 80.00 15.35 10.50 114 226 200
L 95.00 15.35 12.50 280
NDX-600
6" X 6"		 S 125.00 20.50 13.95 136 226 265
L 175.00 20.50 15.65 320
NDX-800
8" X 8"		 S 200.00 25.40 18.50 160 276 325
L 275.00 25.40 20.25 380
NDX-1000
10" X 10"		 S 325.00 33.50 22.50 193 316 410
L 425.00 33.50 25.50 410
NDX-1200
12" X 12"		 S 475.00 40.20 33.50 218 400 550
L 550.00 41.25 35.75 450

Dimension

NDX-SERIES
Pump
Model		 Pump Dimensions
Overall Mounting & Shaft Flange
A
F		 H3
H4		 B
C		 E
T		 L
L1		 H1
H2		 ØD P
Q		 D2
D3		 D4
K
NDX-500
5" X 5"		 S 720 510
335		 200 380 75 215 47 16 254 216
L 435 200 36 80 182 51.5 22 08
NDX-600
6" X 6"		 S 810 565
400		 250 385 93 260 57 16 279 241
L 512 250 35 105 221 61.5 22 08
NDX-800
8" X 8"		 S 970 640
450		 300 450 85 292 74 20 340 292
L 560 300 42 90 245 79 22 08
NDX-1000
10" X 10"		 S 1075 720
500		 350 465 90 320 77 22 406 362
L 610 350 50 100 275 84.5 25 12
NDX-1200
12" X 12"		 S 1200 825
575		 400 625 100 375 85 22 482 432
L 700 400 50 120 310 91 25 12

Flow and Power Calculation

Qa(actual) = (Pump RPM/960)Qd - Qs(Sleepage flow) where Qs=Cs X Cd X Ci Pa(actual) = Pump RPM/960 X (Qd X ∆P)27 + Pv(Viscous power) Where Pv=Cr X Cv X Cp
Coefficient of Differential Pressure(Cd) Coefficient of leakage & extra power
for different viscosity
∆P Kg/Cm2 2 4 5 7 9 10 12 Viscosity CST 1 10 35 75 150 350 600 850 1250
Coeffi. ∆P 0.35 0.55 0.65 0.80 0.92 1.00 1.10 Coeffi Leakage Ci 2.75 2.00 1.50 1.20 1.00 0.85 0.70 0.65 0.60
Coeffi Ex.Power Cp 0.40 0.55 0.75 1.00 1.25 1.85 2.25 0.65 3.25
Reduction ratio & available Pump RPM when coupled with 1440 RPM prim-mover(to be corrected to actual speed)
Reduction Ratio 1:2.2 1:2.1 1:2 1:1.9 1:1.8 1:1.7 1:1.6 1:1.5 1:1.4 1:1.3 1:1.2 1:1.1
Pump RPM 655 686 720 758 800 847 900 960 1028 1108 1200 1309
Coefficient RPM Cr 0.27 0.29 0.32 0.35 0.37 0.4 0.45 0.49 0.52 0.62 0.72 0.82

Uses

NDX series pumps are designed to handle bulk volume of viscous & semi viscous liquids quite efficiently at medium pressure up to 11 bar. The pump can be coupled directly with drive as impeller speed reduction ismade possible within pump, making it very compact & cost economical & there by reducing the over all cost & space, the timing gear reduces the noise level & enhances the working life of the pump.This pump out performance twin Screw pump in all aspect in this range & they are suitable for wagon decanting, cargo-un-loading of various viscous liquids such as edible oils, Fuel oils, viscous chemicals etc. Step-down Versions are also available; type MDX comes without reduction gears where as type JDX comes without timing & reduction gears, type JDB is with bush bearing suitable for molasses applications.

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