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7. Control Valve and Actuator
The desired steam quantity is set over a control valve, which is
located between separator and steam lan ce. The control va lve
itself is controlled by an electrical or pneumatic actuator.
If control valve and actuator are included in the delivery the rele-
vant operating and installation instructions will be enclosed.
If control units from other manufacturers are used the customer
must check whether these are co mpatible with the steam injec-
tion humidifier.
7.1 Control Valve
The control valve regu lates the steam quantity by means of the
valve lift. When the valve is closed the valve con e rests against
the valve face. When the valve rods lift the cone there is a resul-
tant gap through which the desired quantity of steam flows. The
gap can be widened or narrowed as required.
As a general rule the customer is free to use any typical co ntrol
valve which is approved for steam control.
Standard are the Spirax-Sarco Valves from HygroMatik. Alterna-
tive suppliers can be listed on application.
Spirax-Sarco control valves Type LE33; KE63
Flanged
A
B
C
Kvs-value [m³/h]
DN15
130
103
69
0.2, 0.4, 0.5, 1.0,
1.6, 4.0
DN20
150
103
69
6.3
DN25
160
103
69
10.0
DN32
180
132
69
16.0
DN40
200
132
69
25.0
Summary of Contents for DDS20
Page 1: ...Steam Injection Humidifiers DDS for existing steam nets DDS ENZ DDS EN Manual...
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Page 56: ...12 2004...
