Models VWB-400 to VWB-6000


  • Capacities from 200 gph to 3000++ gph
  • For Propane, Butane, and other LPG
  • Shell-and-Tube Heat Exchanger
  • ASME “U”-stamped
  • Ex-proof Class I, Div 1, Group D
  • Small Footprint, High Efficiency
  • PLC Controls with First-Out Monitor
  • Local Start/Stop Station
  • Dual Liquid Carryover Protection with
    “Smart” Liquid Carryover Function and
    Ultrasonic Liquid Level Control
  • UL stamped external Relief Valve
  • All-welded Liquid Inlet Assembly
  • Flanged Steam Inlet with Steam Temperature Regulator and
    Steam Back Check
  • Option: Walk-in Control Room
  • Option: Remote Monitoring and Operation (Modem, Ethernet, Wireless)
  • Option: Integration with LPG/Air Mixers for Standby Systems and
    Peak Shaving Systems
  • Option: Chinese Pressure Vessel Approval
  • Option: 6-inch color LCD Display with Touch Screen Operator Interface, alarm history, and local trend recording.
General Description

Alternate Energy Systems offers a complete line of circulating-hot-water vaporizers in capacities from 200 gallons per hour to 3000 gallons per hour.The heat exchanger tube bundle is of multi-pass design to transfer the maximum heat to the liquid. The tube bundle and all propane piping conform to Section VIII, Division I of the latest edition of the ASME Boiler and Pressure Vessel Code. The pressure vessel carries the ASME ”U” stamp and is National Board registered.

VWB vaporizers in standard configuration include temperature regulator; dual liquid carryover protection through ultrasonic liquid level transmitter in the pressure vessel, and “smart” liquid carryover protection with Rosemount pressure transmitter and temperature transmitter in the vapor outlet; and liquid inlet valve. Temperature gauges in water inlet and outlet, and in pressure vessel shell and vapor outlet, are standard.

Vaporizer design, wiring, controls, and electrical components and their installation comply with the latest editions of NFPA #58 and NFPA #70.

All safety devices of the vaporizer, including the dual liquid carryover protection, are monitored by a programmable logic controller (Allen-Bradley MicroLogix-1100 or Siemens S7-1200), which is connected to an operator interface with high-resolution LCD display and touch screen. The operator interface provides start/stop control for the vaporizer; it displays the system status, and any failure conditions that may occur, in plain English (with date/time stamp). The electrical enclosure for the PLC and the operator interface are to be installed in non-classified location.

A small explosion-proof enclosure at the vaporizer provides local start/stop and alarm reset functions.

NOTE:
The hot-water consumption of VWB Vaporizers is proportional to the actual vaporization rate. The consumption rates given in the table below are based on 185°F (85 °C) water temperature and 40°F (22°C) inlet/outlet temperature drop.

Model
Number

Nominal Capacity
(Propane & LPG up to 30/70 Propane/Butane)

Water Flow
(185 °F / 85 °C)

Shipping
Weight

Dimensions
L x W x H
inches / m

gph

MMBTU/h

kg/h

MMkcal/h

gpm

l/min

lb / kg

VWB- 400

200

18.4

400

46

23

85

600 / 275

18″ x 25″ x 88″
0.45m x 0.65m x 2.24m

VWB- 800

400

37

800

93

46

170

770 / 350

VWB-1200

600

55

1200

139

69

255

1060 / 480

VWB-1600

800

74

1600

185

92

340

1150 / 520

VWB-2000

1000

92

2000

232

115

425

1570 / 715

27″ x 37″ x 94″
0.6m x 0.95m x 2.40m

VWB-3000

1500

138

3000

348

173

638

1880 / 855

VWB-4000

2000

184

4000

464

230

850

2350 / 1065

34″ x 43″ x 103″
0.9m x 1.10m x 2.65m

VWB-5000

2500

230

5000

580

288

1063

2520 / 1145

VWB-6000

3000

276

6000

696

345

1275

2910 / 1320

Common Specifications
Design Temperature 650 °F / 343 °C
Design Pressure 250 psi / 17 bar
Test Pressure 375 psi / 26 bar
Relief Valve Setpoint 250 psi / 17 bar
Electrical AC 110 V 60 Hz, Single Phase, 5 A / AC 220/240 V 50 Hz, Single Phase, 5A