Siemens VGD20.5011 Double Block Gas Valve Body

Siemens SKU: PHP6557

Siemens VGD20.5011 Double Block Gas Valve Body

Siemens SKU: PHP6557
Regular price £175.99

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Siemens VGD20.5011 - Double gas valve, DN 2"

The Siemens VGD 20 5011 is designed as a double gas valve to be integrated into gas trains.

A universal mounting plate facilitates attachment of a number of commercially available pressure switches or valves proving devices. Both the pilot gas flange and the universal mounting plate are exchangeable and can be fitted on either side of the valve.


VGD20.5011 Gas Valve Specifications

  • 2" Flange 
  • Use with SKP Actuators
  • Static Pressure (closed) 1200mbar

Siemens VGD20.5011 Gas Valve

The VGD20.5011 is primarily suitable for:

  • On gas-fired combustion plant
  • In gas trains in connection with forced draft gas burners

The VGD20.5011 can be used as:

  • Shutoff valves (in connection with SKP15... actuators)
  • Control valves with shutoff feature (in connection with SKP25, SKP55 or SKP75 actuators)


All VGDs can be combined with any type of SKPx5.


  • Mount the electro-hydraulic SKP15 on the inlet side and the SKPx5 with integrated controller (SKP25, SKP55 or SKP75) preferably on the outlet side of the VGD
  • When mounting the VGD in the gas piping, 2 AGF10s are required
  • When replacing a VGD20 on existing AGF10s, new O-rings must be mounted
  • When replacing a VGD20 on existing AGA41 / AGA51 flanges (old flange series), new O-rings and longer screws (M8 x 35) must be mounted (AGA92)
  • To prevent cuttings from falling into the VGD, first mount the AGF10 on the pipes
  • Then clean the parts before installing the VGD20


Sectional View of the VGD20.5011

Siemens VGD20.5011 Gas Valve

Application example VGD20.5011 with SKP15 (mounted on V1) and SKP75 (mounted on V2) Shown without AGF10

Siemens VGD20.5011 Gas Valve Applications

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