PEL 20S 0989B gas control valve flame supervision FSD/FFD, similar to the PEL21S gas valve but without the pilot connection.
Shaft diameter: 8×6.5m
Shaft length: 22/15mm
Thermocouple connection: M8x1
Type: With ignition flame
Shaft length knob: 15mm
Bypass nozzle: 0.35 mm
Shaft flat: lower
Gas input: M16x1.5
Gas outlet: M16x1.5
Tube diameter: 10 mm