Views: 0 Author: J-VALVES Publish Time: 2025-03-19 Origin: Site
● Body: The body of the valve serves as the main housing and provides the structural support for the other components. It is typically made of materials such as carbon steel, stainless steel, ductile iron, or other alloys, depending on the application requirements.
● Bonnet: The bonnet is attached to the top of the valve body and encloses the stem and the internal components of the valve. It provides access for maintenance and repair and helps to prevent the leakage of fluid from the valve.
● Stem: The stem connects the actuator (such as a handwheel, electric motor, or pneumatic cylinder) to the gate and transmits the force required to open and close the valve. The stem is usually made of a corrosion-resistant material, such as stainless steel, to ensure long-term durability and reliability.
● Gate: The gate is the moving component of the valve that controls the flow of fluid. It is designed to slide up and down within the valve body, either parallel or perpendicular to the flow direction, to open or close the valve. The gate is typically made of a metal alloy and is coated with a soft sealing material, such as rubber, PTFE, or EPDM, to create a tight seal against the valve seat.
● Seat: The seat is the stationary component of the valve that provides the sealing surface for the gate. It is usually made of a hard material, such as metal or ceramic, and is designed to withstand the pressure and temperature of the fluid being handled. The seat is often replaceable, allowing for easy maintenance and repair of the valve.
● Actuator: The actuator is the mechanism that operates the valve, either manually or automatically. Manual actuators, such as handwheels or lever handles, are commonly used for small valves or applications where frequent operation is not required. Automatic actuators, such as electric motors, pneumatic cylinders, or hydraulic cylinders, are used for larger valves or applications where remote operation or precise control is necessary.
The sealing performance of a soft seated gate valve depends on several factors, including the quality of the sealing material, the design of the gate and seat, the pressure and temperature of the fluid being handled, and the alignment of the gate and seat. To ensure optimal sealing performance, it is important to select a soft seated gate valve that is designed and manufactured to meet the specific requirements of your application.
ASME B16.34 Standard for Soft Seated Gate Valves
● Design Pressure and Temperature Ratings: Soft seated gate valves must be designed and rated for the maximum pressure and temperature conditions of the application. The design pressure and temperature ratings of a soft seated gate valve are typically indicated on the valve nameplate or datasheet.
● Dimensions and Tolerances: The dimensions and tolerances of the valve body, bonnet, stem, and other components of a soft seated gate valve must comply with the requirements of the ASME B16.34 standard. This ensures the interchangeability of valves and the compatibility of the valve with other components of the piping system.
● Materials of Construction: The materials used for the body, bonnet, stem, gate, seat, and sealing elements of a soft seated gate valve must comply with the requirements of the ASME B16.34 standard. The standard specifies the minimum requirements for the materials of construction, including the chemical composition, mechanical properties, and corrosion resistance of the materials.
● Testing Procedures: Soft seated gate valves must be tested to ensure their performance, durability, and reliability. The ASME B16.34 standard specifies the testing procedures for soft seated gate valves, including hydrostatic testing, pneumatic testing, seat leakage testing, and other tests.
● Marking Requirements: Soft seated gate valves must be marked with the manufacturer's name or trademark, the valve type, the size, the pressure rating, the temperature rating, the material of construction, the test date, and other relevant information. The marking requirements of the ASME B16.34 standard ensure the traceability and identification of valves.
