Siemens VRD40.150UF Technische instructies - Pagina 4
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Technical Instructions
Document Number CC1N7649us
September 08, 2016
Specifications
Agency approvals/standards
Approvals
Operating
Maximum operating pressure
environment
Maximum back pressure (differential)
Close-off pressure
Permissible gases
Permissible gas temperature
Permissible operating temperature
Use
Functionally, the valves correspond to Siemens gas valves in accordance with UL 429.
They are designed for use with slightly aggressive and dry gases
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The valve is used as:
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The chemical composition and aggressiveness of each type of biogas or recycling gas is
different, not constant and depends on several factors.
Aggressiveness of the gas against valve materials augments especially
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The user must decide after consultation with Siemens whether the valve materials are suited
for the relevant type of gas.
The composition and concentration of the gas components may vary.
It is therefore impossible to provide a guarantee regarding life expectancy.
The suitability in principle is based on tests carried out on the gases to be used.
With VRD40.xxxUx valves in biogas applications. It is recommended to
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Maximum 140 °F (60 °C)
Gases like biogases, digester gases, process gases, natural gas or air
Shutoff valve (in connection with SKP15...)
Control valve with shutoff function (in connection with SKP25..., SKP5... or SKP7...)
For SKP... with pressure regulation function (SKP2..., SKP5... and SKP7...) is recommended
to review with Siemens with regard to suitability with the relevant type biogases.
as the hydrogen sulfide content H
as the moisture content and the temperature of the gas increases. Condensation in the
valve is not permitted.
install a valve proving device / sequence
leak test the valves at 6- to 12-month intervals
install SKPx5... with POC
UL/429, FM/7400,
CSA/ANSI Z21.21/CSA 6.5 C / I
Commercial/industrial
IRI approvable
Agency marks apply only for VRD40.xxxU series
gas valve bodies assembled with SKPxx.xxxUx
actuators.
See Table 2
4 psi (300 mbar)
See Table 2
See Type of gases and Use
14 °F to 140 °F (-10 °C to 60 °C)
14 °F to 140 °F (-10 °C to 60 °C)
S increases
2
Siemens AG Building Technologies Division
VRD4 Series Double Valves