Plug member of gas valve

A plug member of a gas valve, having an axial bore located in an axial direction thereof, a first bore, and a second bore, wherein the first bore and the second bore are located in a radial direction of the plug member;

• the first bore and the second bore communicate with the axial bore, respectively;
• a diameter of the first bore is larger than a diameter of the second bore;
• the plug member is characterized in that:
• a first guiding slot and at least one first oil groove are recessed into an outer peripheral surface of the plug member, wherein the first guiding slot extends in a direction from the first bore toward the second bore;
• the first guiding slot has a first end and a second end, wherein the first end communicates with the first bore, while the second end is near the second bore without physically communicating with the second bore;
• the at least one first oil groove is near the second end of the first guiding slot without physically communicating with the first guiding slot or the second bore;
• wherein an extension line on the outer peripheral surface of the plug member extending from the second end of the first guiding slot to the axial direction of the plug member is defined to pass through the at least one first oil groove.