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From: NAFCO-China Brass Ball Valves and Brass Fittings Manufacturer Brass Check Valve Definition Brass Check Valves, also called non-return valve or one-way valve,  is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. There're brass spring check valve, brass foot valve, swing type check valve.  Brass strainer valve is installed in pipeline to filter impurities of the flow,  normally Y shape type, the flow was cleaned the by a stainless steel screen / filter inside of the valve when it goes through. It is widely used in residential premises and for industrial or commercial applications Brass Check Valve Classification Brass check valve can be divided into lift type check valve, swivel type, butterfly type, pipe type, slow closing type and diaphragm type check valve according to its structure. 1. Swing Check Valve The

NAFCO | Forging of China Brass Ball Valves and Brass Fittings From: NAFCO-China Brass Ball Valves and Brass Fittings Manufacturer Here we introduce the relevant knowledge of brass valve and brass fittings forging.   1, Classifications of forging   I). According to the deformation temperature classification: The recrystallization temperature of the brass is about 727 ℃, but 800 ℃ is used as the dividing line. The hot forging is higher than  800 ℃, and it is called hot forging or semi-hot forging between 300 and 800 ℃.   II). According to the blank classification: Forging can be divided into free forging, upsetting, extrusion, die forging, closed forging, closed upsetting. 1). Free forging. The use of impact or pressure to make the metal in the upper and lower iron (anvil) between the deformation to get the required forgings, mainly forging and mechanical forging two. 2). Die forging is divided into open forging and closed forging. Metal blanks in a certain shape of

NAFCO | Nominal Diameter of Brass Valves and Brass Fittings From: NAFCO-China Brass Ball Valves and Brass Fittings Manufacturer Many users and buyers are always confused and asking what's nominal dia meter of  brass valves  and  brass fittings  in China,  we have answers for you:   Nominal diameter (nominal diameter), also known as the average outside diameter, refers to the standard diameter after the standardization, the midpoint diameter between inner diameter and outer diameter, marked as DN, measured unit in mm. It's widely used to measure sizes in  China  brass ball valves ,  brass radiator valves ,  brass gate valves ,  brass angle valves.   For example, the nominal diameter of containers with an average diameter of 25 mm will be marked as DN25, here is an expalation for reference. Explanation for DN Size of Brass Valves and Brass Fittings   Nominal diameter and imperial unit comparison table (for valves and metal pipes) DN Size 15 20 25 32 40 50

NAFCO | The Function and Role of Brass Valves From: NAFCO-China Brass Ball Valves Manufacturer No matter how advanced modern science and technology, some of the traditional components in our lives and production or has an irreplaceable role, such as brass valves. In our daily life, water pipes, gas pipes, once without the control of the brass valves, we can imagine how much trouble will bring to our lives. It’s same in industrial production, radiator temperature control valves, thermostatic control valves, cannot be ignored. Let's get to know more about the Brass valves. Brass valves are produced with the production of fluid pipes; the use of brass valves has been nearly 4,000 years of history. China in ancient times from salt wells in the absorption of brine salt, had used in the bamboo pipe in the plug valve. In 1800 BC, the ancient Egyptians in order to prevent the flood of the Nile and the construction of large-scale water conservancy is also used a similar wooden cork

NAFCO | A Brief History and Development of Brass valves From: NAFCO-China Brass Ball Valves Manufacturer The use of the brass valve touches every day in our lives, when we open the faucet to drink water or open the fire hydrant to irrigate the farmland, we and the brass valves are engaged in the interaction, the pipeline is staggered, and behind all have a variety of brass valves adhere to. The development of the brass valve is closely related to the development of the industrial production process. In ancient times, people in order to regulate the flow of rivers or streams, the use of large stones or trunks to prevent the flow of water or change the direction of flow of water. As early as the end of the Warring States period, Qin Shu County prefect Li Bing (birth and death unknown) has been in the Chengdu plains cut salt wells, drain salt decoction. Take the halogen, the fine bamboo for the drain halogen tube, inserted into the casing, the bottom of the tube to the skin for