Introduction

Application

Design

Operation

Specification

Series VAX4600 Vaporizer is designed to automatically vaporize liquid chlorine, sulfure dioxide or ammonia to provide high feed rates for gas dispensing equipment or other gas needs. These vaporizers are designed and fabricated in accordance with Section VII, Div. 1 of the ASME Boiler and Pressure Vessel Code and provided with a "U" stamp to meet the pressure vessel requirements of the code. The entire unit meets Chlorine Institute guidelines for chlorine vaporizing equipment.

The vaporizers are housed in corrosion resistant ABS and structural foam cabinets, identical in size and color to the cabinets of Capital Controls' mounted gas feeders.

Series VAX4600 Vaporizer
Fully automatic unit Rugged corrosion-resistant construction External heating medium, circulation not required Hot water convection heating Finned vaporizing chamber for efficient heat transfer Meets ASME code and Chlorine Institute guidelines Easy-to-read, eye level indicators NEMA 4X controls
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Applications Vaporizers are designed for systems, large or small, where the rate of gas withdrawal from a container (or multiple containers) is not sufficient to meet the demand for gas. Capacities up to 10,000 PPD (200 kg/h) are available. Disinfection for potable water and municipal wastewater plants. Cooling water plants: heat exchangers, piping, towers Dechlorination for waste-water and textile plants Bleaching: textiles, pulp and paper, food Metal finishing waste: cyanide, chromium
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Design Features The Capital Controls vaporizer is a water-bath type unit with the following outstanding features: Superior Construction : Inner liquid chamber fabricated from heavy wall pipe that exceeds ASME code requirements, six individual heating elements, stainless steel water tank. Efficient Heating: Outer surface of liquid chamber finned to enhance heat transfer Ease of  Maintenance: Individual heating elements are oriented horizontally in water bath for easy field replacement Safe Design: Gas pressure relief valve provided to prevent excessive gas pressure buildup within the vaporizer. All controls are rateeed at NEMA 4X.
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Operation The vaporizer contains a liquid chemical chamber submerged in a water bath. The water is heated by a set of six electric immersion heaters, thermostatically controlled within preset adjustable limits. The liquid chemical to be vaporized is delivered to the inner chamber through the liquid inlet line at the top of the unit. The liquid inlet piping discharges at the bottom of the vaporizing chamber, where a liquid level is maintained in the chamber. The liquid absorbs heat from the hot water bath and vaporizes. The liquid level self-adjusts to the withdrawal rate of the gas. The gas flows up and out of the vaporizer through a gas discharge line to the pressure reducing valve and then to the gas dispensing equipment or other applications. As the gas flows upward within the vaporizer chamber, it is superheated by contact with the inner chamber wall and baffles. The baffles remove entrained liquid permitting only gas to exit the chamber. The superheat prevents the gas from reliquefying as it flows through the pressure reducing and regulating valve to the gas dispensing equipment. This valve shuts off automatically when the water chamber temperature falls below a preset limit, preventing liquid from entering and flooding the gas dispensing system. A pressure relief valve installed in the gas discharge line, operates when the pressure within the vaporizing chamber exceeds safe limits.
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Technical Data Capacity and Service Chlorine Model VAX Power Consumption PPD kg/h (kW) Chlorine Model VAX Power Consumption PPD kg/h (kW) 4,000 75 9 6,000 120 12 8,000 150 15 10,000 200 18 Sulfur Dioxide Model VAX4690S Power Consumption 3,000 60 9 4,500 85 12 6,000 115 15 7,500 140 18 Ammonium Model VAX4690A Power Consumption 1,000 20 9 1,500 30 12 2,000 40 15 2,500 50 18 Electrical Requirements Heater Circuit: 240, 380, 480, 575 Vac, 50/60 Hz, 3 phase Control Circuit: 120 Vac, 60 Hz, or 240 Vac, 50 Hz, single phase Standard Features: ASME Approved Chamber Gas Temperature Gauge Gas Pressure Gauge Water Temperature Gauge Water Temperature Thermostat Water Low Temperature Switch Low Water Level Switch High Water Temperature Switch Water Level Control Water Level Sight Gauge Cathodic Protection Gas Pressure Relief Valve and Rupture Disc Dry Contacts for Control and Alarm Circuits Foam Insulation Corrosion-Resistant Cabinet