What is A126 class B cast iron ball valve?
I. Basic Definition
A126 Class B cast iron ball valve is a kind of valve with ASTM A126 Class B grey cast iron as the material of valve body, which belongs to the category of American Standard low-pressure ball valves, and is mainly used in low-pressure fluid control scenarios such as water treatment, water supply and drainage. Its name 'A126 Class B' represents that the valve meets the performance requirements of ASTM A126 Class B grey cast iron.
Second, the structure and material
Valve body material: ASTM A126 Class B grey cast iron, carbon content ≥ 3.0%, with high hardness and corrosion resistance.
Core components: the ball is usually stainless steel or nickel-plated cast iron, sealing materials are mostly brass or polytetrafluoroethylene (PTFE), to ensure that the sealing of the low-pressure environment.
Connection: flange connection is the main, in line with ANSI 125/150LB (lb) standard, suitable for low pressure piping system.
Third, performance characteristics
Mechanical properties:
Tensile strength ≥ 207 MPa, elongation ≥ 0.6%, suitable for ≤ 1.6 MPa low pressure environment.
Excellent corrosion resistance, can be used for a long time for water, sewage and other non-corrosive media.
Operating characteristics:
By rotating the ball to achieve the opening and closing of the fluid and flow regulation, easy to operate and reliable sealing.
Support two-way flow, suitable for truncation purposes.
Four, application areas
Municipal engineering: waterworks, sewage treatment system pipeline control.
Industrial field: irrigation system, fire-fighting pipeline, low-pressure chemical medium transmission.
Export scenario: comply with American Standard (ANSI) and European Standard requirements, commonly used in international projects.
V. Precautions
Applicable limitations: Not applicable to high temperature (>200 ℃) or strong corrosive media (such as strong acid, strong alkali).
Alternative materials: If you need more high strength or pressure resistance, you can use ductile iron (such as ASTM A395) or cast steel material valves.
Summary: A126 Class B cast iron ball valves with low cost, corrosion resistance and low-pressure sealing as the core advantage, is the municipal and industrial low-pressure fluid control in the general-purpose valve
