De Nora Capital Controls 71V3B Series, Instruction Manual

115.6031.0 

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1.3 

 Component Description

Refer to Figures 1, 2, 3, 4 and 5 to supplement the following text.

1.3.1 General

In addition to the components described in Section 1.3.2, which comprise the Basic Vaporizer Unit,  

all Vaporizer Systems should be piped and valved to include the auxiliary components as shown in  

Figures 2 and 3.

1.3.2   Basic Vaporizer Unit

1.3.2.1  Water Chamber

The water chamber provides uniform distribution of heat around the outer surface of the  

vaporizing chamber wall. The chamber’s outer surface is covered with closed cell foam   

insulation to minimize radiant and convective heat losses.

1.3.2.2  Vaporizing Chamber

The vaporizing chamber receives the liquid chemical from its source and converts it into the  

gaseous state at a rate equal to the demands of the using system. This chamber contains an inlet 

tube and superheat baffle which function as described below to provide the essential  

operating requirements of the vaporizing system.

 a. 

Inlet Tube: The inlet tube, which extends to the lower portion of the chamber, serves to 

provide both forward and reverse flow of liquid chemical to and from the chamber; thereby, 

automatically regulating the level of liquid chemical in the chamber to increase and decrease 

the liquid contact area, and hence the rate of evaporation, in accordance with the demands of 

the overall system.

b. 

Superheat Baffle: The superheat baffle, which extends a short distance downward from the top 

of the chamber, serves to force the gas to travel along the hot wall  of the chamber as it passes 

from the surface of the liquid to the outlet; thereby, superheating the gas, i. e., increasing its 

heat content at the existing pressure within the chamber, prior to its discharge to the gas 

distribution system.

1.3.2.3  Water Level Gauge

The water level gauge provides visual indication of the water level in the water chamber.

1.3.2.4  Electric Immersion Heater

The electric immersion heater supplies the heat required to maintain the temperature of the water  

in the water chamber at the desired operating value.

1.3.2.5  Magnetic Heater Contactor

The magnetic heater contactor acts in response to the water temperature controller to  energize and  

de-energize the electric immersion heater. This component, although essential to the operation  

of the Vaporizer, may not have been supplied unless specifically requested. This may have been  

due to site specific electrical design criteria requiring that the contactor be mounted in a centrally  

located motor control center.