97161 Pressure Relief/Flame Trap Assembly

Shand & Jurs Biogas 97161 Pressure Relief/Flame Trap Assembly PDF
  • Internal Sense Tap Internal Sense Tap (1/2" NPT External Sense Tap Optional)

  • (External Sense Tap Optional)

  • Positive Emergency Shutoff

  • Maintain Upstream Pressure

  • 255°F. Fusible Link

  • Sizes 2" Through 12"

  • Optional Insulation Jackets Available


The Shand & Jurs Biogas 97161 Pressure Relief and Flame Trap Assembly combines the 97150 back pressure regulator, a thermal operated valve and the 94309 horizontal flame arrester to maintain upstream pressure and effectively inhibit flame propagation in low pressure gas lines.

The Flame Arrester tube bank assembly absorbs heat faster than the ignited gas can produce it. This lowers the gas temperature to below the ignition point, thus quenching the flame. The back pressure regulator maintains an adjustable preset upstream pressure. When upstream pressure exceeds set point, the diaphgram will open the valve. After relieving gas to flare the pressure in the line will drop below set point closing the valve. The Pilot Valve Assembly contains a fusible material that melts at 255°F and closes the regulator valve effectively shutting off flow during emergency thermal event conditions.

Standard materials of construction include an Aluminum Body and Buna-N diaphragm. Its aluminum and stainless steel components withstand the severest of process environments.

Its aluminum and stainless steel components withstand the severest of process environments. The Shand & Jurs Biogas 97161 is especially designed for hydrogen sulfide and hot, wet methane which are the main components of digester gas streams in municipal waste water treatment facilities.