... to maintain and clean.4,The regulating valve and vent valve of the semi coke off-gas can ... blowoff vale, pressure meter, pneumatic shut-off valve, electric actuator, gas ratio regulator valve, gas fire barrier, etc.3,Gas ignition ... , ignition gas angle seat valve, ignition compressed air magnetic valve, ignition transformer, ignition needle valve, throttling valve, ignition electrode, metal hose ...