Siemens VGD20.323U Технические инструкции - Страница 7
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VGD Series Double Valves
Specifications
Physical
Body materials
characteristics
Weight
Connections
Pipe connections
Pressure and vent taps
All VGDxx.xxxU gas valves are normally closed, two‐way valves. The valves have a standard,
Operation
integral, stainless steel mesh filter (0.9 mm) in the inlet to protect the downstream
components against contamination.
All valves have ¼ NPT ports for pressure test connection. A full size vent connection plate is
available as an accessory for VGD40.xxxU valves.
See Table 2 and 3 for details on ports and vent connection plates.
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Siemens AG Building Technologies Division
Figure 1. Sectional view of VGD20.xxxU
VGD20.xxxU double valves consist of two valves in series.
The first (inlet) valve has a flat valve disc suitable for the safety shut‐off function only.
The second (outlet) valve has a contoured valve disc for stable regulating control and
smooth release of gas.
See Table 2
See Tables 4
NPT threads or ANSI class 150 flanges
(see Table 2)
See Tables 2 and 3
7631z50us/0815
Technical Instructions
Document Number CC1N7631us
November 08, 2017
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