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Surface welding of sphere
What is the difference between forged valves and cast valves? Why should it be divided into two types of lectures? Next, this article will explain how to distinguish between forged valves and cast valves. Forged valves Forged valves are forged and usually used on high-grade pipelines, with a relatively small diameter, usually below DN50. 1. Forging: It is a processing method that uses forging mach...
Intelligent regulating valves should be regularly inspected during use. If any faults are found, they should be immediately stopped, the cause should be identified, and the fault should be eliminated. Common faults and troubleshooting methods are as follows: 1. Valve stem and push rod: The surface is damaged and must be replaced. 2. Compression spring: If there are defects such as cracks that affe...
1、 The reason for leaving three threads on the bolt Bolt is a common fastener widely used in fields such as mechanical equipment, construction engineering, and automotive manufacturing. The retention of three threads in bolts is to ensure the tightening force and reliability of threaded connections. Specifically, the main reasons are as follows: 1)Increase the contact area. Leaving three threads o...
When carbon steel or stainless steel flanges are equipped with 304 material bolts in flange joint sealing, leakage problems often occur during operation. This lecture will provide a qualitative analysis of this. (1) What are the basic differences between 304, 304L, 316, and 316L materials? 304, 304L, 316, and 316L are commonly used stainless steel materials in flange joints (including flanges, sea...
Butterfly valve is a general term, also known as flap valve. If further subdivided, butterfly valves can be divided into many types. Different types of butterfly valves have different operating conditions and produce different effects. Below, we will analyze the functions of butterfly valves based on several common types of butterfly valves, including soft sealed butterfly valves, hard sealed butt...
Butterfly valve is a type of regulating valve with a simple structure, which can also be used for regulating low pressure and large diameter. Butterfly valves can be used to control air, water, steam, various corrosive media, mud, oil and other media. 1. Features: 1) Small size, light weight, flexible and convenient operation; 2) Simple and compact structure, good sealing performance, convenient m...
Globe valve, also known as shut-off valve, belongs to the forced sealing type valve and is a type of shut-off valve. There are three types of connection methods: flange connection, threaded connection, and welded connection. The "Three Modernizations" of valves in our country once stipulated that the flow direction of globe valves should be from top to bottom, so there is directionality during ins...
At present, the commonly used hardening processes for the surface of metal hard sealed ball valves mainly include the following: (1) Surface welding (or spray welding) of hard alloy on the sphere can achieve a hardness of over 40HRC. The process of surface welding of hard alloy on the sphere is complex, with low production efficiency, and large area welding can easily cause deformation of the part...
Principles for selecting globe valves A globe valve refers to a valve in which the closing element (disc) moves along the centerline of the valve seat. According to the movement of the valve disc, the change in the valve seat opening is directly proportional to the valve disc stroke. Due to the relatively short opening or closing stroke of the valve stem and the highly reliable cut-off function, a...
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