Pneumatic flange gate valve is a low-bracket open-stem pneumatic gate valve with pneumatic execution organization. Because the valve adopts a double-cylinder structure, compared with a single-cylinder pneumatic gate valve, the lifting force is doubled. This fundamentally deals with the disadvantage that certain valve bodies of the single-cylinder pneumatic gate valve are wedged and cannot be opened. In addition, because the pneumatic gate valve has a buffer structure, it can effectively slow down and lighten the abrasion of the valve plate car sealing surface and the valve body sealing surface formed by the downward impact of the piston when the stainless steel pneumatic valve is closed. Together, it can also prevent the gate from jamming. Appearance.
In order to cooperate with users to complete the operation automation, it can also independently supply the cylinder block including the bracket to help users modify the existing complicated manual gate valve, and organize the double-cylinder pneumatic execution and some equipment on the large cover of the manual gate valve. , It can form a dual-cylinder pneumatic-manual dual-purpose gate valve. Because of its advanced skills, reliable functions, convenient operation switching and repair, it has been widely used as pipeline opening and closing equipment for transporting gas and liquid media in petroleum, chemical industry, metallurgy, electric power, shipping and other parts.
Pneumatic gate valve structure and operation instructions:
1. This valve is mainly composed of valve body, bonnet, gate, valve stem, sealing ring, double-layer cylinder and its piston, piston rod, partition as well as buffer organization, manual organization, pneumatic-manual conversion equipment and bonnet packing equipment Wait for some composition.
2. When the upper piston travels to the upper end of the stroke, the upper echoer can be mounted to send a signal; the lower piston travels to the lower end of the stroke can be mounted on the lower echoer to send a signal as the gate valve opening and closing information in the central operating room The imitating external dial is displayed.
3. The rise and fall of the outstretching indicator rod on the upper part of the handwheel indicate whether the gate of the valve is in a lifting condition or a falling condition. When the gate valve is closed, the outstretching indicator rod is in the lowest position; conversely, when the gate valve is fully opened, the outstretching indicator rod is in the highest position. This is the on-site indication of the opening and closing status of this valve.
4. The upper part of the cylinder head is equipped with pneumatic-manual conversion equipment. Lift the change handle clockwise to the "pneumatic" positioning hole to position, and the gate valve is in pneumatic operation; on the contrary, move the change handle counterclockwise to the "manual" position at the hole, and the gate valve can be operated manually. The handle with bevel gear changes in the opposite direction. When the gate valve is manually operated, the rotation direction of the hand wheel is the same as that of a general manual valve, that is, it turns clockwise to close and counterclockwise to open. The rotation of the bevel gear is reversed.