Humidification products Steam injection humidifiers
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2020
TI-P795-02 CTLS Issue 6
Type 20 and Type 40 Sizing Direct Steam Injection Humidifiers Product selection The best diffusion of steam into the air flow is achieved by spreading the outlet nozzles of the lance(s) evenly within the duct, vertically and horizontally. This is achieved by following the example through the five steps below.
Step 1 - The known data
1 800 mm high and 1 800 mm wide
Duct size
1.5 bar g
Steam pressure
110 kg/h
Required maximum steam flowrate
Screwed
Spirax Sarco valve connection
Electric
Valve actuation
230 Vac, 100/110 Vac, 24 Vac/dc
Actuator voltage
VMD, 0-10 Vdc, 4-20 mA
Control signal
Step 2 - Select the lance Select the recommended number of lances required from Table 1 to match the known duct height.
Table 1
Duct height in mm
Number of lances
up to 1 000
1
1 000 - 1 700
2
8.1.4
3
1 700 - 2 200
2 200 - 2 600
4
2 600 and above
5
Number of recommended lances required = 3
Step 3 - Select the lance model Select the lance model from Table 2 to match the known duct width. Duct width in mm
11.1 7
Table 2
Maximum
450 630 900 1 200 1 470 1 780 2 080 2 380 2 690 3 000 3 300 3 610 3 950
Minimum
280 450 630 900 1 200 1 470 1 780 2 080 2 380 2 690 3 000 3 300 3 610
Lance model
6
1
1.5
2
3
4
5
7
8
9
10
11
12
Recommended lance model = 6
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