Flame Trap NK-FT23A

INTRODUCTION
The Model NK-FT23A 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.

MODEL NAME : NK-FT23A

NK-FT23A : FLAME TRIP

NK-FT23A : PHOTO

SPECIFICATIONS

MODEL NAME NK-FT23A
TYPE FLAME TRAP
SIZE 2” THROUGH 12”
INSTALLATION VERTICAL / HORIZONTAL INSTALL
CLASSIFICATION DEFLAGRATION FLAME ARRESTER / BI-DIRECTIONAL
NORMAL WORKING PRESSURE BELOW 10000mmH2O (STANDARD SPECIAFICATION)
EXPLOSION GAS GROUP IIA(standard), IIB/IIC(for special application)

MATERIALS

PART NAME MATERIALS STANDARD MATERIALS OPTIONAL
BODY C.S / SUS304 / SUS316 / ALUMINUM Hastelloy, Alloy 20, Monel, Inconel
ELEMENT 316L SS Hastelloy, Alloy 20, Monel, Inconel
HOUSING C.S / SUS304 / SUS316 / ALUMINUM Hastelloy, Alloy 20, Monel, Inconel
HOOD 304 SS / 316SS 316L SS
BOLT and NUT C.S / 304 SS / 316 SS 316L SS

DESIGN AND FUNCTION
The Model NK-FT23A is a combination of the MODEL NK-FA23T flame arrester and the thermal operated shut-off valve. The Model NK-FT23A 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℃ designed to shut-off the gas flow within 15 seconds upon reaching its temperature rating. The Model NK-FT23A series flame trap is designed easily to maintain without valve main body removal from pipe line when replacing the fusible element. The Model NK-FT23A 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-FT23A 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℃ the disc of shut-off thermal valve is closed.

Normal operation condition

Fired condition