The company has a group of cooperation teams engaged in the Gate Valve Manufacturer industry for many years, with dedication, innovation spirit and service awareness, and has established a sound quality control and management system to ensure product quality.
Figure 1: Bolted bonnet gate valve
Selecting the right gate valve material is crucial in the gate valve selection process. Various materials are used for the gate valve's body and seal. The material selection depends primarily on the media type and design temperature. This article discusses the common materials used in gate valves and how to find the right one for each application.
Gate valves are used in a wide range of applications, and they come in contact with diverse media. It is critical to consider the material used for valve construction to prevent premature valve failure and system delays during valve operation. Consider the following criteria to select the proper materials for a gate valve:
Gate valves are available in various materials, as discussed in the next section. Various organizations are committed to developing and maintaining standards for valves and materials in specific environments. For example, gate valves are specified by the American Petroleum Institute (API) and the National Association For Corrosion Engineers (NACE) for their suitability to work with heavy corrosive media.
Figure 2: PVC gate valve
In a PVC gate valve, the valve's three main components, namely, the handle, housing, and gate, are made of PVC.
PVC gate valves are a good low-cost solution for most flow control needs at home. These valves are durable and corrosion-resistant, hence widely used in aquatic environments. A few common applications are:
In applications where PVC gate valves would burst, it is a viable option to use gate valves made of metals or their alloys.
Brass can withstand more heat than PVC, making them an ideal choice for residential plumbing applications. Brass is extremely corrosion resistant, and the gate valves made of brass are ideal for manufacturing industries involving natural gas or potable water.
Figure 3: Stainless steel gate valve
Stainless steel is extremely durable and corrosion-resistant, hence used in marine and industrial applications. Some common applications are:
Figure 4: Bronze gate valve
Bronze has high lead content; hence the material is not used frequently for drinking water applications. Bronze is commonly used for fluid control in low-pressure manufacturing industries and works well with steam, air, and gas. The material is also used in HVAC and marine applications.
Figure 5: Cast iron gate valve
Cast iron is used for constructing gate valves in low-pressure and low-temperature applications. The material is a popular choice for gate valves in water, wastewater, heating, ventilation, and air-conditioning (HVAC) units. Cast iron gate valves are extremely cheap, yet sturdy; hence these valves are more suitable for underground applications than steel valves.
Figure 5: Cast steel gate valves used in industrial plants
Gate valve seats are available in two forms:
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