如何.Y. Ensures a High-Quality Gas Product

如何.Y. McDonald Ensures a High-Quality 天然气 Product

When dealing with natural gas, safety is always a top concern. 的目的 天然气计量装置 is to  provide a home or building access to this resource in a safe and efficient manner. 的 meter set includes many parts, such as natural gas valves and meter bars. 的se important devices help control the flow of gas during normal use and maintenance.

对于制造商来说, creating a quality solution is a priority throughout the entire production process, 从砂型铸造开始. 的 sand casting process for natural gas valves includes the following steps:

1. 的 sand is mixed with clay and water
2. A machine squeezes the sand around the pattern to make a mold
3. 的 metal is poured into the mold to make the casting
4. 的 castings go through a cleaning process to remove sand

石膏打好之后, quality continues to be a top priority during the manufacturing process for both valves and bars. Continue reading to find out what quality measures are taken throughout the rest of the production journey.

• 生产设备

Maintaining a high-quality product is a very large factor to manufacturing iron and brass castings. Doing so includes checking the chemistry of the metal with a spectrometer as well as instruments that are used to measure the tensile strength and hardness of the castings. Coatings are used to further ensure a high-quality product.

Machining iron castings may be completed multiple ways. One way is to use single point CNC equipment. 的 brass plug valve located in the center of a plug valve must be machined to perfection so that the tapers of the body and plug match. Special equipment, such as a CMM (coordinate measuring machine), may be used to measure these tapers.

Gas components have tight dimensional tolerances so precision measuring devices are used to measure them during production. 的se critical dimensions are measured by CMM, 卡尺, 身高指标, 或专业功能仪表.

• 线程

线程 on natural gas components’ end connections create a pressure tight seal which provides a compact and streamlined connection. This means that they also play a critical role for many gas products. Internal threads, or female threads, can be machined with single point tooling or with a tap. 外部线程, 或公线, can be cut with single point tooling or with chasers held inside a die head. 的se are common methods for cutting threads.

Thread gages are used to check tapered threads, as well as straight threads. 对于直螺纹, Go and No-Go ring gages check external threads while Go and No-Go plug gages check the internal threads. A series of ANPT (Aeronautical National Pipe Taper) gages are used when checking male and female NPT (National Pipe Thread) threads.

• 压力测试

的 B16.33个标准 requires all valves to be tested at one and a half times the rated pressure. This testing can be done by either using electronic pressure testing or by pressurizing the part while it is underwater and looking for bubbles. 的 valves are tested in the closed position and in the open position. Similar testing practices as the valves are used to test the bars but, since the bars are after the regulator, testing at the factory exceeds 1 ½ times the rated pressure.

•  Re-Lube特性

Some plug style valves are created with a re-lube feature which allows fresh grease to be pumped into the valve. This is a useful feature if the grease dries out, 是被吹掉了插头吗, or it the valve starts leaking for some reason. 的 re-lube ports may be in the head of the plug or in the side of the body, depending upon the manufacturer of the valve.

In the natural gas industry, it is no secret that safety is a concern. That’s why you need a natural gas product manufacturer that you can trust puts the utmost importance into creating a long-lasting and high-quality solution. Learn more about the manufacturing and quality process for natural gas valves and bars by taking the ‘线程 and Gages on 天然气 仪表阀门 and Bars’ 香鱼课程. 另外，调用A.Y. McDonald at 1-800-292-2737 or fill out a 联络表格 在nemeanbuhar.com to inquire about our own product offering.