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NAFCO | China Brass Ball Valve Production Processes Time:2017-07-19 From: NAFCO- China Brass Ball Valve Manufacturer  Th e reliable and stable quality of brass ball valve comes from every process and details of production and quality control. At  NAFCO , a professional  brass ball valve manufacturer  in China, we take every effort to control the production and quality processes.   This article will introduce you the  China Brass Ball Valve  Production Processes , as well as our quality control. 1. Design and Engineering For new products, OEM products, or regular products with modification, engineers will design the brass ball valves before releasing for production, to ensure everything conform to quality standard and customers’ requirements.   2. Raw Materials The raw materials will be selected as per production BOM sheet. Different kinds of  brass materials  are separately stored with specific color labels, to classify the material types and avoid misuse.   3.

In Previous articles, we discussed about Quality factors of China brass ball valves and Quality Test for China Brass Ball Valves, as an important part of the quality, materials play a critical role, especially for brass valve performance and healthy considerations. There’re four main aspects to Select China Brass Valve Material: 1. Healthy consideration: Lead (Pb) is a kind of chemical that can dissolve and contaminate water, and make affect the health of people, such as mental health of children. Materials that have high lead rate are not suitable and avoided for drinking water system. 2. Applications of valves: working pressure, working temperature, flow media type. 1. Generally speaking material with more copper(Cu) content has better extensibility, and will stand for higher working pressure and temperature, impurities like Fe, Mn, Sn is not stable for brass material physical function

Good quality comes from strict traceable process control, as well as professional tests during production and before delivery. To meet the standard and quality requirements, NAFCO has been making every and best efforts to control quality of brass ball valves, we're pleased to share the quality tests for brass ball valves. General tests for inspection of finished brass ball valves 1. Thread conformance and length 2. Leakage Test (Air pressure 6-8kgf/cm2=6-8 Bar) 3. Weights and operating smoothness 4. Handle angle and finishing 5. Dimensions of brass ball valve   Type tests made in lab for picked samples 6. Openning torque 7. Operating torque 8 Torque test 9. Bending test 10 Endurance test 11. High-low temperature test 12. Angular seal tests As a professional China brass ball valve manufacturer and supplier, NAFCO is applying most intensive inspections and tests for brass ball valves we made. Our best seller brass ball valves at http://www.acrofluid.com