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What are the main factors affecting valve sealing?
Valve leakage is very common in daily life and industrial production, and the impact is very large. It will cause waste or bring danger to life. For example, the leakage of tap water valve will lead to serious consequences, such as the chemical industry. Toxic, harmful, flammable, explosive and corrosive media leakage, etc., serious threats […]
Reasons and solutions for leakage of valve sealing surface
The valve is the most used control component in the fluid system. It can be used to switch or control the flow direction and adjust the function. From the simplest cut-off function, the valve is sealed in the machine. Its function is to prevent the medium from In the cavity where the part is located, […]
Description of electric valve connection
Electric valve wiring methods are classified according to different use requirements and different field conditions, and the wiring methods used by electric actuators with different functions are also different. The user should have an understanding of the relevant knowledge of the wiring, so as to avoid unnecessary failures. On the one hand, the entire circuit […]
The main classification and use conditions of valve sealing materials
The valve seal is the most important part of the entire valve. Its main purpose is to prevent leakage. The valve sealing seat is also called a sealing ring. It is an organization that directly contacts the medium in the pipeline and prevents the medium from flowing. When the valve is in use, there are […]
Valve material and valve standards-(9)- general valve & parts materials
General valve material The internal material combination specified by API600 for general valve material: Stem material types hardness sealing surface seal part no., material type hardness 13Cr 200-275 1 13Cr ≥HB250 4 13Cr ≥HB750 5 or 5A HF ≥HB350 6 13Cr/NiCu ≥HB750/≥HB175 7 13Cr/13Cr ≥HB250/≥HB750 8-8A 13Cr/HF ≥HB250/≥HB350 18Cr-8Ni no require 2 18Cr-8Ni no require […]
Valve material and valve standards-(8)- Monel alloy application
4. Application of Monel alloy: The A and E levels of M35-1, M35-2 and QQ-N2-88 are usually used to manufacture refined Monel alloy pumps, valves and accessories. The B-grade (3.5%Si) Monel alloy with the highest Si content is mainly used to manufacture shafts and wear-resistant rings that require good wear resistance due to its high […]
Valve material and valve standards-(7)- Monel alloy
Monel alloy for corrosion resistant valve 1. Introduction/overview of Monel alloy: Monel alloy, cast nickel alloy, Hastelloy alloy, etc. are all materials for making special purpose valves. Monel alloy is a Ni-Cu alloy in nickel-based corrosion-resistant alloys. It was first developed by the US Nickel Company. Its typical composition is 70% Ni and 30% Cu. […]
Valve material and valve standards-(6)-gasket material
Valve Gasket material: The gasket is used to fill all the unevenness between the two joint surfaces (such as the sealing surface between the valve body and the bonnet) to prevent the medium from leaking between the joint surfaces. 1. Requirements for gaskets: The gasket material has a certain degree of elasticity, plasticity and sufficient […]
Valve material and valve standards-(5)-packing material
Packing /Filler material: On the valve, the packing is used to fill the space of the valve cover packing chamber to prevent the medium from leaking through the valve stem and the bonnet packing chamber. Requirements for packing. 1. Good corrosion resistance, the filler must be able to withstand the corrosion of the medium in […]
Valve material and valve standards-(4)-fastener material
Fastener materials: Fasteners mainly include bolts, studs and nuts. The fastener directly bears the pressure on the valve, which plays a key role in preventing the outflow of the medium. Therefore, the selected material must ensure sufficient strength and impact toughness at the operating temperature. When selecting fastener materials according to medium pressure and temperature, […]