Mechanical Vapor Recompression (MVR)

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Material Of Construction – Standard Construction

  • Housing – Cast Iron internally coated with Zylon
  • End Plates – Cast Iron internally coated with Zylon
  • End covers – Cast Iron
  • Rotors – Ductile Iron Externally coated with Zylon
  • Shafts – Ductile Iron cast integrally with rotor Externally coated with Zylon
  • Bearings- Gear End – Double row ball Free end and drive shaft –Single row ball
  • Gears – Heat treated alloy steel, helical cut
  • Seals – DE & NDE – Double Lip seals mounted on SS shaft sleeve, Drive shaft – Double Lip seal
  • Lubrication – Oil splash system at both DE & NDE Oil chamber’s with water cooling Coils inside the Oil chamber.

Water Injection Manifold – Fitted inside the square Flange of the Suction Port for uniform water spraying on the end to end length of the Lobes surface Area.

Material Of Construction – SS316 Construction (Optional)

  • Housing – SS316
  • End Plates – SS316
  • End covers – Cast Iron
  • Rotors – SS316
  • Shafts – SS316
  • Bearings- Gear End – Double row ball, Free end and drive shaft –Single row ball
  • Gears – Heat treated alloy steel, helical cut
  • Seals – DE & NDE – Double Lip seals mounted on SS shaft sleeve Drive shaft – Double Lip seal
  • Lubrication – Oil splash system at both DE & NDE Oil chamber’s with water cooling Coils inside the Oil chamber.

Water Injection Manifold – Fitted inside the square Flange of the Suction Port for uniform water spraying on the end to end length of the Lobes surface Area.

Blower Offered With

  • Water Injection considered at pump suction for control of pump temperature & Suction Pressure
  • Air Injection considered at pump suction and Recirculation of the same through the bypass valve fitted across the pump is for initial heat up of the evaporator and drying of the blower before shutdown of the same
  • Pump Shaft sealing selected for 100% water wapour compression.

PLC/DCS Based Operation & Control Instrumentation For Blower Package

  • Pressure Transmitter at suction of the MVR Pump for measurement & control of Pressure, electrically interlocked to VF
  • Variable Frequency Drive for capacity & pressure control electrically interlocked to MVR Electric Motor
  • Temperature Transmitter at Discharge of the MVR Pump for measurement & control of Temperature, electrically interlocked to MVR by pass control Valve
  • MVR by pass control Valve fitted across the pump for air recirculation/blowing for initial heat up of Evaporator & MVR drying before shutdown, electrically interlocked to Temperature Transmitter at discharge of the MVR Pump.
  • Water/Air Injection control valve fitted at suction of MVR pump for control of suction Pressure, electrically interlocked to Suction Pressure transmitter.
  • Temperature sensor for MVR Bearing Temperature monitoring at DE &NDE,alarm/shutdown signal at excessively high temperature.
  • Temperature sensor for MVR Oil Temperature monitoring at DE & NDE ,oil splash lubricating chamber’s, alarm/shutdown signal at excessively high temperature
  • Flow switch at inlet of water supply to cooling Coils inside the Oil chamber’s at DE & NDE,MVR to Trip if water supply stops.

All the Instruments are skid mounted on the MVR machine having common base frame.

Electrical Control Panel

Type – Non Flame Proof

All Electrical Control Circuitry is placed inside the panel for sequential operation of the MVR.It consists of

  1. Mains Switch – Siemens/L&T or equivalent
  2. MVR ”ON & OFF” Switches
  3. VFD is fitted inside the panel
  4. PLC is Fitted inside the panel

Control Panel is skid mounted on the common base frame of MVR with Electrical Instruments Cabling to the Electrical Motor & Instruments.

Interconnecting Piping & Common base frame

By pass (butterfly or ball) valve with manifold at suction and is fitted across the MVR with interconnecting piping and MVR machine along with the Instruments and Electrical Control Panel is mounted on common base frame having easy access to all the equipments for operation and maintenance.

Pump Model MVR250 MVR400 MVR600 MVR900 MVR1000 MVR1200 MVR2000 MVR2500 MVR3000 MVR4000
FAD at 60Hz at 3600RPM 272m3/hr 408m3/hr 680m3/hr 918m3/hr 1224m3/hr 1360m3/hr 2040m3/hr 2720m3/hr 3400m3/hr 4590m3/hr
FAD at 50Hz at 2880RPM 225m3/ hr 325m3/hr 550m3/hr 750m3/hr 1000m3/hr 1100m3/hr 1650m3/hr 2200m3/hr 2750m3/hr 3700m3/hr
Maximum dryVacuum >15” of Hg >15” of Hg >15” of Hg 17” of Hg >15” of Hg 17” of Hg 17” of Hg >15” of Hg >15” of Hg >15” of Hg
Maximum Vacuum (with water Injection) <24” of Hg <24” of Hg <24” of Hg <24” of Hg <24” of Hg <24” of Hg <24” of Hg <24” of Hg <24” of Hg <24” of Hg
Maximum 1.03bar 1.03barg 1.03barg 1.2barg 1.03barg 1.2barg 1.17barg 1.03barg1. 1.03barg1. 1.03barg1.
Discharge Pressure (Dry Air) g 03barg 03barg 03barg
Maximum Discharge Pressure (Water Vapour) 0.98barg 0.98barg 0.98barg 0.98barg 0.98barg 0.98barg 0.98barg 0.98barg 0.98barg 0.98barg
Maximum Differential Pressure 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar) 0.8bar (800mbar)
Maximum Delta T with water vapour 20 degC 20 degC 20 degC 20 degC 20 degC 20 degC 20 degC 20 degC 20 degC 20 degC
BHP at 0.4799 bar differential Pressure 7.2 9.2 13.8 18.5 24 30 41.5 52 65 83
Recommende d Electric Motor 10HP,2pole,50/6 0Hz,Inve rter duty,44 0V,3phase 12.5HP,2pole,50/60 Hz,Inverte r duty,440V,3phase 20HP 2pole,50/6 0Hz,Inverte r duty,440V, 3phase 25HP 2pole,50/ 60Hz,Inve rter duty,440V,3phase 30HP 2pole,50/ 60Hz,Inve rter duty,440V,3phase 40HP 2pole,50/6 0Hz,Inverte r duty,440V, 3phase 50HP 2pole,50/6 0Hz,Inverte r duty,440V, 3phase 60HP 2pole,50/6 0Hz,Inverte r duty,440V, 3phase 75HP 2pole,50/6 0Hz,Inverte r duty,440V, 3phase 100HP 2pole,50/6 0Hz,Inverte r duty,440V, 3phase
Suction & Discharge Port Size 2” 2” 2” 4” 4” 6” 6” 6” 6” 6”
Dimensions (Bareshaft Unit) 473.3m m(L)X22 8.6(W)x336.6m m(H) 524mm(L) X228.6(W)x377.9mm (H) 625.6mm(L)X228.6(W)x377.9mm( H) 703.3mm( L)X304.8( W)x381m m(H) 779.5mm( L)X304.8( W)x381m m(H) 741.4mm(L)X406.4(W)x508mm(H) 830.6mm(L)X406.4(W)x508mm(H) 906.5mm(L)X406.4(W)x508mm(H) 1008.1mm( L)X406.4(W)x508mm( H) 1160mm(L) X406.4(W)x 508mm(H)
Bareshaft 150kg 170kg 200Kg 250kg 385kg 530 585 640 720kg 800kg
Unit weight