Flame Trap(MODEL:NK-FT23) 

- Spring actuated Quick shut-off thermal valve and fusible element, Sight glass and indicator hood.
- Size : 2” through 12”
- Available in Aluminum, Carbon Steel, Stainless Steel
- Other size and material to be consult by factory.

INTRODUCTION

The Model NK-FT23 is used to protect low pressure waste gas systems if a fire is burning in
the piping. The flame trap is a valve intended to prevent backfiring of inflammable mixture
of air and vapor and gas etc. automatically. The flame trap assembly serves to extinguish a
fire occurring in sewage and other facilities where methane gas is apt to be produced. When
the gas catches fire, the valve is closed by the generated heat to stop the gas flow. The
Flame Trap is generally installed in gas lines leading from each digester and gas holder. It is
also installed in a line to gas utilization equipment, as close as possible to the source of
combustion.

DESIGN AND FUNCTION

The Model NK-FT23 is a combination of the MODEL NK-FA23T flame arrester and the thermal
operated shut-off valve. The Model NK-FT23 flame trap assembly may be installed in the
vertical or horizontal position. The thermal operated shut-off valve includes a compression
type fusible element rated at 127'C designed to shut-off the gas flow within 15 seconds
upon reaching its temperature rating.
The Model NK-FT23 series flame trap is designed easily to maintain without valve main body
removal from pipe line when replacing the fusible element.

The Model NK-FT23 series flame trap is designed to check the valve on/off condition
through a heat resistant glass at outside of flame trap assembly.

 

The Model NK-FT23 is designed to inspect easily the valve trim parts without the main body
valve removal from pipe line. 

If a fire is burning in the pipe line, the compression type fusible element of shut-off thermal
valve is melted with heat within 15 seconds at 127'C the disc of shut-off thermal valve is
closed. 

 

DRAWING AND DIMENSION