VLM valve by Pietro Fiorentini is a bypass and throttling device characterized by a soft insert on the valve seats for better tightness and a balanced shutter for easier opening and closing. The top-entry body is suitable for flanged coupling.

This device is mainly used in high-pressure transmission systems and in medium pressure gas distribution networks and it is suitable for use with natural gas and previously treated, non-corrosive gaseous fluids.

VLM is Hydrogen Ready for NG-H2 blending.


  • Design pressure: up to 102 bar
  • Design temperature: from -20 °C to +60 °C
  • Nominal sizes DN: up to 8″
  • Connections: Class 150, 300, 600 RF or RTJ according to ANSI B16.5 and PN16 according to EN 1092 and ISO 7005
  • End to end dimensions: according to EN 334
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