The Gate, Globe and Check Valves Standards
Gate valves are primarily used to start or stop a flow in a pipe. They are often used in steam and water systems, where the flow can be intermittent or constant. Gate valves are most often used for regulate and regulate the flow of water, steam, or other media. The use of a gate valve is preferred to a ball valve or globe valve, since the latter require a large amount of force to open or close due to the pressure of the system.
The gate valves are designed as single port or multi-port valves with construction from either brass, iron or stainless steel. In addition, the valves are provided with a variety of options for body, seat, stem and bonnet features.
Globe valves are used to regulate the flow of liquids or gases in the pipeline. Globe valves are one of the most common type of valve used in a variety of applications, ranging from regulating flow in gases to controlling the flow of industrial chemicals and petrochemicals. Globe Valves are mainly used to regulate the flow of liquid or gas in a pipe. In contrast to other types of valves, globe valves require more control on the part of the operator because they are opened and closed incrementally, rather than all the way in one motion. Globe valves are available in a variety of materials, such as brass, stainless steel, cast iron, bronze and various alloys.
Check valves are designed to allow materials to flow in only one direction and are some of the simplest types of valves. The check valve is usually placed at the exit of a pump, the end of a inlet line, or on a dead-end of a pipe system. Due to their simple design, check valves are usually quite reliable and require very little maintenance.
The types of check valves available in the market include swing check valves, ball check valves, silent check valves, globe type check valves, piston check valves, dual plate check valves and pressure assisted check valves. Depending on the application, each type of check valve is selected based on their pros and cons.
All of the gate, globe, and check valves follow standards set by international organizations. These organizations include American Petroleum Institute (API), the American Society of Mechanical Engineers (ASME), American Society for Testing and Materials (ASTM).
The American Petroleum Institute (API) provides standards and regulations concerning the drilling and production of oil and gas. API standards also cover the design, manufacture, operation and maintenance of valves, piping, pumps and other apparatus that are used in the oil and gas industry.
The American Society of Mechanical Engineers (ASME) develops standards for valves and pressure-containing parts, such as pipe, tubing, and all the associated components used in the operation of piping systems, from valves to fittings to pumps. These standards apply to both new and repair parts.
The American Society for Testing and Materials (ASTM) develops standards for materials used in the manufacture and testing of gate, globe, and check valves. Most ASTM standards cover the physical and chemical characteristics of the material, such as strength, ductility and resistance to corrosion, among others, of the valve parts and how the parts are manufactured and put together.
In addition, there are also the European standards, such as the European Valve Manufacturers Association (EVMA) standards, the Water and Gas Quality Analytical Standard (WQAS) and the Industrial Valve Manufacturers Association Standards (IVMA). All of these standards provide an excellent reference for designing and testing the valves to meet the criteria of a variety of applications.
Gate, globe, and check valves have a wide variety of purposes, so it is important to ensure that they meet the necessary standards before they are used. All of the standards developed by API, ASME, ASTM and the European organizations help to provide accuracy and reliability in the production and operation of gate, globe, and check valves.
