Ventilation valve is a simple structure of the control valve, but also can be used for low pressure pipeline medium switch control. No internal ventilation butterfly bolts and other fasteners that can effectively extend the service life of the ventilation valve. Ventilation valve is a non-sealed butterfly valve, used in dusty cold or hot gas pipeline chemical, building materials, power plants, glass and other industries ventilation, environmental protection projects, as the gas medium pipeline regulate or cut off the flow control device. General ventilation valve in the pipeline should be installed horizontally. In the procurement of ventilation valve, should be strictly carried out in accordance with conditions choice, but you need to know the size of the following aspects: First, ① ventilation valve product name and model ② the caliber ③ ventilation ventilation butterfly valve with an attachment so we can correct for your election type. Second, if the unit has been selected by the design of the electric tilt valve models can be ordered from our company directly by the electric tilt valve models. Third, when the occasion is very important or the environment is more complicated, you try to provide design drawings and detailed parameters, by our engineers for your audit checks. Ventilation valve ordering: 1, ① product name and model ② ③ nominal diameter body material nominal ④ ⑤ ⑥ Sealing form using the media (hard seal, soft seal) ⑦ ⑧ temperature drive mode (manual, bevel gear, pneumatic, electric , hydraulic power); ⑨ enclosure so we can correct for your selection. 2. Please indicate any special requirements when ordering products 3, have already been selected by the design unit model, press the model directly to our Sales Department Order. 4, when the occasion is very important or the environment is more complicated, you try to provide design drawings. Our company specializes in the production of ventilation butterfly, strictly in accordance with operating conditions can be made depending on the different ventilation valve design, ventilation butterfly valve design conditions. My company has a professional R & D talent and technology specialist, has rich material and human resources. Companies with customer site requirements using computer-aided drafting, and whom the selection based on customer needs, providing effective design solutions to meet customer requirements.