There are many types of valves, so there must be a unified model preparation method to allow buyers to understand a valve structure, characteristics and materials in time.
In the case of no valve drawing, lack of nameplate, and incomplete valve parts, the recognition of valves is of great significance for the correct use, repair, repair, and replacement of the valve. Valve identification, material identification and valve logo description are as follows:
Using the knowledge obtained from the "basic knowledge of the valve", you can directly identify the category, structural form, material, nominal size, nominal pressure (or work pressure), and appropriately identify the valve according to the nameplate and label color on the valve and the paint color on the valve. The medium, temperature and turnover direction.
1. The nameplate is fixed on the valve body or hand wheel. The data on the nameplate is relatively complete, reflecting the basic characteristics of the valve. According to the manufacturer on the nameplate, the vulnerable drawings and data of the valve are requested to the Shengjing factory, and the repair content is referred to according to the production date. According to the conditions provided on the nameplate, determine the materials and forms of replacing the pads and fillers, and the materials that replace other valve parts
2. The logo is to indicate the nominal pressure, work pressure, nominal diameter and medium flow of the valve body by casting and printing. There is also a sign on the valve opening indicator, which has an open scale or arrow indicator open and closed. The upper end of the throttle valve and the blind rod gate valve is equipped with an open indicator, and the arrow indicates the turnover direction on the hand wheel. The end surface of the valve stem is engraved with a straight slot opening that is consistent with the valve channel, indicating that the opening and the channel form 90 ° and close.