Operation - Siemens VGG Series Technical Instructions

VGG Series Valves

Operation

All VGG10.xxxU gas valves are normally closed, two-way valves. The valves have a standard,
integral, stainless steel mesh filter (0.9 mm) in the inlet to protect the downstream
components against contamination.
VGG10.xxxU series gas valves have a contoured valve disc for stable regulating control and
smooth release (see Figure 1).
Sectional view of VGG10.xxxU valve
Siemens AG Building Technologies Division
Figure 1. Sectional view of VGG10.xxxU models
Closing spring:
The valve includes a closing spring. The spring force acts as closing force on the valve
seat.
Technical Instructions
Document Number CC1N7636us
February 09, 2016
Page 5