Whether the check valve used on the pump is durable in cast iron or cast steel

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Of course, the durability of cast steel.

Just use ductile iron materials.

Noh An. The pressure bearing capacity of cast steel check valves is higher than that of cast iron check valves.

Be sure to install a cast steel check valve, the steam boiler reflects safety, reliability, and peace of mind.

Answer: What you said is not very clear, but generally it should be pressed on the check valve and radiator connection pipe by the end of the hair.

The main difference between cast iron and iron steel valves is the different carbon content, which directly affects the strength and plasticity of the steel.

Carbon steel, also known as carbon steel, is an iron-carbon alloy with a carbon content of less than 2%. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur, phosphorus According to the use, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is divided into two types: building structural steel and machine-made structural steel According to the carbon content, carbon steel can be divided into low carbon steel (WC) medium carbon steel (and high carbon steel (WC> According to phosphorus and sulfur content, carbon steel can be divided into ordinary carbon steel (higher phosphorus and sulfur content), high-quality carbon steel (lower phosphorus and sulfur) and high-grade high-quality steel (lower phosphorus and sulfur content) Generally, the higher the carbon content in carbon steel, the higher the hardness and higher the strength, but the plasticity is lower.

Cast iron: an iron-carbon alloy with a carbon content of more than 2. Industrial cast iron generally has a carbon content of 2 4.

Carbon is mostly found in graphite form in cast iron, and sometimes in cementite form. In addition to carbon, cast iron also contains 1 3 silicon, as well as elements such as manganese, phosphorus, and sulfur. Alloy cast iron also contains elements such as nickel, chromium, molybdenum, aluminum, copper, boron, vanadium, etc.

Carbon and silicon are the main elements that affect the microstructure and properties of cast iron. Cast iron can be divided into: gray cast iron.

The carbon content is high (, the carbon mainly exists in the form of flake graphite, and the fracture is gray, referred to as gray iron. The melting point is low (1145 1250), the shrinkage is small when solidified, the compressive strength and hardness are close to carbon steel, and the shock absorption is good. It is used to manufacture machine tool beds, cylinders, boxes and other structural parts.

White cast iron. The content of carbon and silicon is low, and the carbon mainly exists in the form of cementite, and the fracture is silvery-white. During solidification, the shrinkage is large, and it is easy to produce shrinkage holes and cracks.

It has high hardness and brittleness, and cannot withstand impact loads. It is mostly used as a blank of malleable cast iron and to make wear-resistant parts. Malleable iron.

Obtained by annealing of white cast iron, graphite is distributed in a flocculent form, referred to as tough iron. Its microstructure is uniform, wear-resistant, and has good plasticity and toughness. It is used to manufacture parts with complex shapes and strong dynamic loads.

Nodular cast iron. The gray cast iron molten iron is obtained after spheroidization, and the precipitated graphite is spherical, referred to as ductile iron. It has higher strength, better toughness and plasticity than ordinary gray cast iron.

It is used in the manufacture of internal combustion engines, auto parts and agricultural machinery. Compacted graphite cast iron. The gray cast iron molten iron is obtained after creeping treatment, and the precipitated graphite is worm-like.

The mechanical properties are similar to those of ductile iron, and the casting properties are between gray cast iron and ductile iron. Parts and components used in the manufacture of automobiles. Alloy cast iron.

Ordinary cast iron is obtained by adding an appropriate amount of alloying elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.). Alloying elements change the matrix structure of cast iron, so that it has corresponding characteristics such as heat resistance, wear resistance, corrosion resistance, low temperature resistance or non-magnetism. It is used in the manufacture of parts and components for mining, chemical machinery and instruments, meters, etc.

Cast iron valves are suitable for low-temperature and low-pressure fluids, generally valves below 16, and valves below 100. Cast steel valves are suitable for more than 16 fluids. Temperatures can be within 200 °C.

Cast iron is mainly used at low pressure and low temperature, and the working conditions are not strict. Such as walking water medium. But seawater cast iron is better than cast steel. The main consideration is the properties of the material.

Yes, different media and different materials are used. It's not your fault that you ship according to the model.

Hehe. The valve material is different.

Half of the cast iron is low-pressure. Like those black valves on the pipes in the community.

Half of the cast steel is a little more high-pressure.

Shanghai Biaoquan Valve is a member of Sinopec, the Ministry of Chemical Industry, the Ministry of Electric Power, the Ministry of Water Supply and Drainage, the Ministry of Machinery, the designated manufacturer, and the China Valve Association.

Specializing in the production of various materials, high, medium and low pressure gate valves, globe valves, check valves, ball valves, plunger valves, safety valves, power station valves.

All kinds of sealed double eccentric butterfly valves, midline butterfly valves, fire signal butterfly valves, caliber DN3-3000mm, various corrosion-resistant pumps, titanium pumps, titanium valves.

Production of all kinds of "APL" valves, to the national generation of valves, pipe fittings.

GB "H" standard and all kinds of non-standard valves, pipe fittings, fasteners, water coolers, water supply and drainage equipment, sewage treatment equipment.

All kinds of water solenoid valves, steam solenoid valves, fountain special series solenoid valves, electric two-way valves (building automatic control),

Electric parallel valves, electric control valves, dynamic parallel valves, dynamic control valves, electromagnetic flowmeters, etc.

Classification of pig iron.

Iron and steel materials usually refer to iron-carbon alloys, classified according to the size of carbon content, carbon content (mass fraction) greater than 2 for pig iron, less than 2 for steel, carbon content (mass fraction) less than 0 04 for industrial pure iron.

Crown valve pushing.

For high pressure, please use cast steel or stainless steel.

1. The general cast iron check valve is sufficient, (the good one can also use the carbon steel check valve);

2. The water supply pipeline can use ductile iron gate valve;

** height of cast steel;

Of course, cast steel is better than cast iron;

Depending on where your water pump is used, if you use a water pump for ordinary life, a cast iron one will do.

Valves vary greatly, and the good ones and the general ones vary exponentially;

The general requirements for fire protection are higher;

If there is a detailed use, it can give you some ** references.

Cast iron is generally used, and if there is cast steel, it must be good for cast steel, and cast iron is easy to break.

Of course, cast steel is good, mainly because of high strength and durability.

The cast steel is good, and the cast steel is strong.

Swing start check valve, copper seal, 10kg pressure, cast steel material.

nominal pressure; T 308-2004 Valve Model. H Check Valve, 4 Flange, 4 (2nd) Swivel Opening, T Sealing Face Material.

2. Check valve refers to the valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, check valve, counterflow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.

3. Check valve: According to the structure, it can be divided into three types: lifting check valve, swing check valve and butterfly check valve. Lifting check valves can be divided into vertical and straight-through types.

There are three types of swing check valves: single-petal, double-petal and multi-petal. Butterfly check valve is butterfly double valve, butterfly single valve, the above check valve can be divided into four types of connection form: threaded connection, flange connection, welding and clamp connection.

4. The structure of the lifting check valve is generally similar to that of the globe valve, and its disc moves up and down along the center line of the channel, which is reliable in action, but the fluid resistance is large, and it is suitable for smaller diameter occasions. Lift check valves can be divided into two types: straight-through and vertical. Straight-through lift check valves can generally only be installed in horizontal pipelines, while vertical lift check valves are generally installed in vertical pipelines.

Swing start check valve, copper seal, 10kg pressure, cast steel material.

Cast iron swing check valves, also known as check valves or check valves, are used to prevent the backflow of media in the pipeline. The opening and closing parts rely on the flow and force of the medium to open or close by themselves, and the valve is called the check valve. Check valves belong to the automatic valve category, which are mainly used on pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents.

H4410 cast iron swing check valve structure features.

1. The length of the structure is short, the length of the structure is only 1 4 1182 of the traditional flange check valve, the size is small, the weight is light, the weight is only 1 1 203 of the traditional flange check valve, the valve disc closes quickly, and the water hammer pressure is small.

4. Horizontal or vertical pipelines can be used, and the installation is convenient.

5. The flow channel is smooth and the fluid resistance is small.

6. Sensitive action and good sealing performance.

7. The disc stroke is short, and the impact force of closing the valve is small.

8. The overall structure is simple and compact, and the shape is beautiful.

9. Long service life and high reliability.

1. Overview. HH44X micro resistance slow closing check valve is used for water supply and drainage pipelines, installed at the outlet of the water attack hole pump to prevent the medium from backflow and eliminate the broken ring water hammer, and can effectively reduce the pressure of the valve closing water hammer, can ensure the safe operation of the valve, it has the characteristics of light valve disc, large opening, significant power-saving effect, small fluid resistance, novel design of the dry water hammer elimination mechanism, stable and reliable sealing performance, wear resistance, long service life, stable operation, no vibration, no noise and other characteristics. The main parts are made of the following materials:

Part Name Material.

Body Cast iron, cast steel, stainless steel.

Bonnet Cast iron, cast steel, stainless steel.

Disc carbon steel, stainless steel + nitrile rubber.

Stem, piston stainless steel.

Second, the main parts of the material.

Part Name: Valve Body, Valve Cover, Disc Shaft.

Materials: Grey cast iron, cast steel, rubber assembly, stainless steel.

Third, the main technical parameters.

nominal pressure; MPA) Nominal diameter.

dn (mm) size (mm).

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