VGD40.040，VGD40.100西门子燃气双阀

Double gas valves for use on gas trains, consisting of 2 safety shutoff valves of class A. Suited for use in connection with gases of gas families I...III.

The double gas valve is to be combined with 2 actuators of the SKP… line (e.g. to provide the functions of 2 safety shutoff valves in series, with different types of gas pressure governor if required).

In combination with the appropriate SKP… actuators, the gas valve also serves as a:

• Shutoff valve (in connection with the SKP10...)

• Control valve with shutoff function (in connection with the SKP20..., SKP27..., SKP50... or SKP70...)

• Ensure that the gaskets are fitted between the flanges

• Check to ensure the bolts on the flanges are properly tightened

• Check to ensure the connections with all components are tight

The double gas valves VGD40... are double seat disk valves of the normally closed type. The stems are guided on both sides of the disks, thus ensuring a precise stroke and tight shutoff. To improve the control performance, the disks at the bottom are profiled. The patented double seats are closed by 2 springs. The spring of each stem exerts a pressure on the disk so that there is a defined closing force acting on each disk. The surface area proportions of the 2 valve disks per stem are such that the closing force increases as the inlet pressure increases (class A valve to EN 161). A strainer on the inlet side protects the valve and downstream controls against dirt. The double gas valves DN65…150 correspond to the standard valve sizes of single valves (EN 558).