• Standard Capacities from 200 gph to 5,000 gph
• Custom Capacities to 20,000+ 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 (Alarm History)
• Local Start/Stop Station
• Dual Liquid Carryover Protection with "Smart" Liquid Carryover and Ultrasonic Liquid Level Control
• UL stamped external Relief Valve
• All-welded Liquid Inlet Assembly
• Flanged Hot Water Inlet
• Hot Water Back Check
• Electronic Operator Interface with high-resolution color LCD Touch-Screen Display; Alarm  History; trend recording;  VNC server for remote monitoring and control.
• Option: Integration with LPG/Air Mixers for Standby Systems and Peak Shaving Systems
• Option: High Pressure to 400+ psi

General Description

Alternate Energy Systems offers a complete line of circulating-hot-water vaporizers in capacities from 200 gallons per hour to 5000 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 dual liquid carryover protection through ultrasonic liquid level detection in the pressure vessel, and "smart" liquid carryover protection with pressure and temperature transmitters in the vapor outlet; liquid inlet safety valve; and hot water back check valve. Temperature gauges in water inlet and outlet, and in pressure vessel shell and vapor outlet are standard..

All safety devices of the vaporizer, including the dual liquid carryover protection, are monitored by a programmable logic controller (Siemens or Allen-Bradley standard), which is connected to an electronic operator interface with high-resolution color LCD 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 a remote, non-classified location.

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

The electronic operator interface also provides graphic TrendLine recording, Alarm History, and built-in VNC server for remote monitoring and control of all vaporizer function via the built-in Ethernet interface

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.