Pneumatic valve is the use of compressed air-driven valve. Pneumatic valve procurement only a clear specification, type, pressure to meet the procurement requirements of the practice in the current market economy environment is imperfect. Because the pneumatic valve manufacturers in order to compete for products, each in the design of pneumatic valve under the concept of a unified, innovative, formed their own corporate standards and product personality. Therefore, pneumatic valve procurement more detailed technical requirements, and manufacturers to obtain consensus, as a pneumatic valve procurement contract annex is necessary. This type of valve in the pipeline should be generally horizontal installation.
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