Siemens VGD20.403U Instrukcje techniczne - Strona 2

Przeglądaj online lub pobierz pdf Instrukcje techniczne dla Jednostka sterująca Siemens VGD20.403U. Siemens VGD20.403U 14 stron. Gas valves, for use with skpxx.xxxu series electro-hydraulic actuators

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Siemens VGD20.403U Instrukcje techniczne

Technical Instructions

Document Number CC1N7631us

November 08, 2017

 UL listed, FM approved, CSA certified, IRI approvable, ISO 9001 and 14000 certified.

Features

All Models

 ¼"‐inch NPT pressure taps on the inlet and outlet and between main valves (see Table 2

 Stainless steel mesh inlet filter protects the valve seat(s) as well as downstream

 Dual stem guides ensure precise disc alignment and tight shut‐off

 Valves in connection with SKPxx.xxxU actuators open slowly and close rapidly

 Compact VGD20.xxxU double‐valve bodies consist of 2 safety shut‐off valves in series.

VGD20.xxxU models

 A 1‐inch NPT vent connection between the valves

 Each VGD20.xxxU double‐valve requires 2 threaded mounting flanges (AGFxx.xxU). Each

 Connecting pattern of the 1...2 inch AGFxx.xxU flanges are identical. This space permits



 Compact VGD40.xxxU double‐valve bodies consist of 2 safety shut‐off valves in series

VGD40.xxxU models

 Each individual safety shut‐off valve has double seats to achieve high flow

 Patented seat construction with individual closing spring for each seat to assure reliable

 Full port vent line connection plates are available



Page 2

CE, Australian approved versions available

for details)

components

The first (inlet) valve has a flat valve disc applicable for safety shut‐off function only.

The second (outlet) valve has a contoured valve disc for use with pressure regulating

actuators (SKP2x.xxxU, SKP5x.xxxU, SKP7x.xxxU)

flange includes the necessary installation hardware (bolts, nuts and O‐ring). Each mounting

flange has a ¼‐inch NPT pressure tap. The flanges can be pre‐mounted onto the pipe, and

then bolted onto the VGD20.xxxU gas valve body. This feature eliminates the use of pipe

unions and permits the gas valve assembly to be easily removed from a gas train

any AGFxx.xxU flange to be mounted to any VGD20.xxxU valve body

NOTE:

VGD20.xxxU valves and AGFxx.xxU flanges must be ordered as separate items (see

Tables 2 and 3).

shut‐off and high close‐off pressure rating

NOTE:

VGD40.xxxU valves and AGA40.xxxxU vent connection plates must be ordered as

separate items (see Tables 2 and 3).

VGD Series Double Valves

Siemens AG Building Technologies Division