Purchasing the necessary technical factors to consider preservative Gas safety burner valve

   Only clear specifications, type, working pressure on the Gas safety burner valve procurement practices to meet the procurement requirements in the current market economy environment is imperfect. Because the Burner Valve manufacturer for the next competition, each Gas safety burner valve were unified design concept, with different innovations, formed their own corporate standards and product personality. Therefore, when the Gas safety burner valve procurement more detailed technical requirements, coordination with manufacturers to reach a consensus, as an annex to the Gas safety burner valve procurement contracts is essential.

1. General requirements

1.1 specifications and types of Gas safety burner valves, piping design should meet the requirements documents.

1.2 Gas safety burner valve models should be specified in accordance with national standard code requirements. If the enterprise standards, instructions should indicate models.

1.3 Gas safety burner valve job pressure ≥ pipeline working pressure, without affecting the price of the premise, the gas safety burner valve can withstand working pressure should be greater than the actual working pressure pipeline; either side of the Gas safety burner valve closing situations should be able to withstand 1.1 times the working pressure Gas safety burner valve values without leakage; Gas safety burner valve open position, the Gas safety burner valve should be able to withstand twice the working pressure Gas safety burner valve requirements.

1.4 Gas safety burner valve manufacturing standards, should explain the basis of the national standard code, if the file should be attached to business enterprise standards, procurement contract.

2. gas Burner Valves standard quality

2.1 Body material shall be ductile iron main, and indicate grades and iron actual physical and chemical test data.

2.2 stem material, and strive to stainless steel stem (2CR13), large diameter Gas safety burner valves should also be embedded in the package of stainless steel stem.

2.3 nut material, cast brass or aluminum bronze, and the hardness and strength are greater than the stem.

2.4 stem bushing material, its hardness and strength shall be not greater than the stem, and is immersed in water conditions and Gas safety burner valve body is not the formation of electrochemical corrosion.