forged steel ball valve &#8211; ZECO Valve

Globe Valve Manufacturer – Various Globe Valve Types

Gate Valve Manufacturer – Various Gate Valve Types

Ball Valve Manufacturer – Various Ball Valve Types

Check Valve Manufacturer – Various Check Valve Types

The post Forged Valve – Forged Steel Globe Valve – Forged Steel Gate Valves For Sale appeared first on ZECO Valve.

Industry News

Jerry — Fri, 24 Jun 2022 21:57:28 +0000

How to Deal With The Three Common Faults of Cast Steel Gate Valve?

We will inevitably meet some failures in the process of using the cast steel gate valve. How should we deal with these failures? Today we will introduce the solutions to solve faults of the cast steel…2022/03/23

How to Fix The Cracks Inside The Cast Steel Gate Valve by Welding?

Before we use the cast steel gate valve for the first time, it is necessary to check whether the cast steel gate valve is qualified or not. However, many people do not know how to troubleshoot in the …2022/03/16

Installation And Precautions of Cast Steel Gate Valve

Ⅰ. Installation and use of cast steel gate valve(1) Before installing cast steel valves, it is necessary to check different parts such as the cavity and sealing surface to avoid dirt or sand particle…2022/03/09

How to Deal with the Valve Core of Cast Steel Gate Valve Falling Off?

As we all know, a gate is the opening and closing part of the cast steel gate valve. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully…2022/03/02

The Importance of Hard Sealing Forged Steel Ball Valve Pressure Test

Valve is an indispensable process component in the fields of modern petroleum, chemical industry and natural gas. It plays the role of diversion, cut-off, throttling, check, and diversion. However, si…2022/02/25

Knowledge of Flange Forged Steel Ball Valve

1. All valves of flange forged steel ball valve are designed as a wholeThere is a mounting flange on the top of the valve body, conforming to the International Organization for Standardization standar…2022/02/18

Analysis and Solution of Internal Leakage of Electric Forged Steel Ball Valve

Comparison of Forming Methods for Ball Valves, Valves and Spheres

The ball is the opening and closing part of the ball valve. The ball rotates around the center line of the valve body to open and close the ball valve. The ball valve can cut off, adjust, distribute a…2022/02/04

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Types of Valves Used in Chemical Industry – Chemical Valve

Jerry — Thu, 23 Jun 2022 15:19:13 +0000

Valves can work for many functions in pipelines and production lines of many different industries. They can be used to monitor flow, pressure, stroke, and more. They can also act as protective equipment which can prevent hazardous issues. Valves could be dealing with gases, fluids, and semi-fluids. Their function is to give direction and regulations to these elements.

Types of Valves for Chemical Industry

The chemical industry can involve various processes. There is control established through the means of electrical, hydraulic, pneumatical, and sometimes through manual basis. The valves used should be able to handle the pressure, and prevent any leakage. Different valves are known for their different functions.

Butterfly Valves

For open/close actions that can take place easily; Butterfly valves are the ideal option. Their installation requires less effort, and they can work with various actuators. Moreover, their maintenance will not take a toll on your expenses, because that requirement is minimal.

Butterfly valves are also important because they can slow the flow of the substance. Another advantage is that they are light in weight. They are also very precise. However, if proper sealing is your main concern, then you might want to consider another valve because butterfly valves can have poor sealing functionality.

Ball Valves

Ball valves are used to control pressure and flow. One feature that makes them so useful is that they’re leak-proof. Thus, these valves are fantastic in the chemical industry when liquids are involved. In terms of structure, they have a group of rotating ported spheres, or balls with holes, that shift to block or permit flow.

They’re most common in systems that control flow from compressed air lines with direction towards high-pressure hydraulic systems. Their popularity, though, stems from more than just fantastic function. They’re cost-efficient, compact, easy to use, and require very little maintenance.

Gate Valves

Gate valves are primarily shut-off valves. That is, they are fantastic at preventing any and all flow of liquid. Throttling with a gate valve, while possible, isn’t recommended. This is due to potential damage to the disc and, over time, possibly permanent damage that renders the valve useless.

In terms of function, gate valves have a plate barrier that enters and retreats from a stream of liquid, operated via twisting a top handle. Alternatives include parallel plates and wedge-shaped plugs. The wedges offer additional variety, making gate valves a great choice for various uses.

These shine most in chemical plants that are most involved with liquids. Still, though, it’s also possible to use gate valves for gas and solids, to a degree. They’re also divided into two primary groups. These are rising-stems and non-rising stems. The former enhances visibility whereas the latter prevents damage from corrosive environmental conditions.

Globe Valves

Globe Valves can be ideal for manual operation. They can work for automatic operations as well. They can be used to regulate flow and pressures. Furthermore, they can also function as completely shut or open flow valves. These sphere-shaped valves have two divisions on the inside. They operate in a linear movement.

Check Valves

Check valves are two-port valves with two openings that allow fluid to flow through in one direction and prevent flow reversal. They’re used in a plethora of industries but are also quite present in the chemical industry. Interestingly enough, they lack a handle or stem. This is because they work automatically and don’t require manual handling.

They come in three forms. These are swing check valves, piston check valves, and lift check valves. The first is most compatible with fluids that move at slow speeds. The second, composed of a disc, piston, or ball, is built for smaller pipes with frequent and significant pressure drops. The third, and final form, is a stem operated version that’s made to resist high temperatures, pressure levels, and highly corrosive substances.

A constant between the different forms is how they react to cracking, reseal, and back pressure. The consistency is found in that they’re built to withstand high levels of the three forms of pressure. This is, to the minimum differential between the inlet and outlet of the valve, pressure present during the closing of the valve, and higher pressure at the outlet than the inlet.

Plug Valves

Plug valves are similar in design to ball valves. They’re classified as quarter-turn valves that control the flow of fluid through a pipe. It does so via a ported plug that swivels into the stream to allow or constrict the liquid. While primarily used for shutting off or permitting a material’s passing, they can also function, to a lesser degree, as a flow regulator.

It’s important to make a distinction between plug valves and lubricated plug valves. The latter, as its name suggests, involves lubrication between the plug and valve. This serves as something of a sealant, whereas unlubricated alternatives use a sleeve made of polymer for friction relief and sealing.

Actuated Valves

Actuated Valve requires a 90-degree turn to completely shut off or open. There can be a pneumatic actuated valve, electric actuated valve, and hydraulic actuated valve. Actuated valves have their own set of functions just like the other valves described above.

Cases of ZECO Chemical Valve

These valves are said to be adaptive to various pipe systems. The piping pressure is required to be low in the case of actuator valves.

INDIA JSW DOLVI 1 Million Tons Coke Oven Project

ZECO VALVE provided lug butterfly valves, cast steel gate valves and motorized ball valves and some other industrial valves.

SINOPEC Nanjing Engineering & Construction Inc.

ZECO VALVE provided forged steel ball valves, gear operated gate valves and electric ball valves and some other industrial valves for SINOPEC to complete the successful completion of CNOOC Huizhou project.

TISCO Expansion Coke Oven Project (VIETNAM)

ZECO VALVE provided triple offset butterfly valves, gear operated butterfly valves and gear operated gate valves and some other industrial valves for TISCO Expansion Coke Oven Project (VIETNAM).

Fine Chemical Valves

In view of the needs in the fine chemical industry, ZECO Valve specially designed titanium and nickel alloy valves to ensure the stability of the valves, to withstand corrosion under different working conditions, to extend the service life, and to increase the productivity benefits of users. With rich customization and project experience, we can certainly give you a perfect choice!

What are Automatic Control Valves?

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How to Determine Whether the Hydraulic Forged Ball Valve Needs to be Renewed After Longterm Use

Jerry — Thu, 23 Jun 2022 03:49:32 +0000

Ⅰ. Composition of hydraulic forged ball valve

The hydraulic forged steel ball valve consists of an electric actuator and a three-way ball valve.

Changing the relative position of the ball core and the pipeline can achieve different combined control of the three pipeline fluids. The hydraulic forged steel ball valve uses single-phase alternating current as of the power source and through the single-phase power switch to drive the reversible single-phase gear reducer motor. The hydraulic forged steel ball valve realizes the reversing effect of the pipeline fluid by the specified combination requirements.

The T-shaped three-way can make the three orthogonal pipelines communicate with each other, not only has the function of splitting (merging), and can make two of the pipelines connect and cut off the other pipeline. The L-shaped three-way flow path can only connect two orthogonal pipes or switch directions.

Ⅱ. Replacement of working sealing ring of hydraulic forged ball valve

1. Subject to the long-term erosion of high-pressure and high-speed water, the surface of the valve body moving sealing ring and the spherical sealing ring will be damaged to a certain extent. If the surfaces of the two sealing rings are severely damaged, and the damaged area is too large, the hydraulic forged steel ball valve seal will appear. If the amount of water leakage increases, it must be replaced.
2. The valve body repair sealing ring and the working sealing ring are movable, and the sealing ring adopts the Yx type cross-section sealing ring to seal the sliding surface. Long-term use will be worn and gradually lose elasticity, which will inevitably cause the valve body to fail to work normally and need to be replaced in time; Oil and water mixing will occur if the sealing drive uses a hydraulic station to supply oil and the sealing surface leaks. If the oil and water mixing is serious, it indicates that the sealing surface of the ball valve is not effective after the hydraulic forged steel ball valve body sealing ring is put into it. It will adversely affect the use of the hydraulic system, and the sealing ring should be replaced at this time. When replacing, follow the procedure for replacing the spherical seal ring.
3. It should be noted that, for slight scratches on the surface of the spherical sealing ring, check and execute it according to the following methods.

Observe the sealing surface of the spherical sealing ring and the spherical sealing ring. If the sealing surface has only a few dents or scratches, it can be repaired with a welding rod, then polished and polished to repair; the spherical sealing ring can be repaired with repair welding. Before disassembling the sealing ring, mark the adjacent parts of the ball body and the hydraulic forged steel ball valve body to facilitate reinstallation in the original corresponding position after repair.

The post How to Determine Whether the Hydraulic Forged Ball Valve Needs to be Renewed After Longterm Use appeared first on ZECO Valve.

Analysis and Solution of Internal Leakage of Electric Forged Steel Ball Valve

Jerry — Wed, 22 Jun 2022 08:00:01 +0000

Electric forged steel ball valve has been more and more widely used in various industrial control systems due to their high control accuracy and convenient installation and debugging. However, in the process of use, there are also some problems that plague the on-site installation and debugging personnel, that is, the problem of internal leakage of the valve. Here we will discuss the common internal leakage causes and solutions of electric forged steel ball valves, hoping to help the on-site maintenance personnel of the factory.

Ⅰ. The inaccurate zero position setting of the electric forged steel ball valve actuator

Adjustment method:

1. Manually close the valve (it must be confirmed that it has been completely closed);
2. Manually close the valve again with a little force, whichever is the case;
3. Screw it back (in the direction of valve opening) for half a turn;
4. Then adjust the limit;

Ⅱ. Selection of stroke mode of electric forged steel ball valve

The valve is opened and closed by rotating 90°. The torque of the actuator is not large enough, so it is easy to reach the full closed position when commissioning without pressure. When there is a rotating force, it cannot overcome the thrust pushed by the liquid, so the closing is not in place.

Solution: Replace the actuator with high thrust, or replace it with a balanced spool to reduce the unbalanced force of the medium.

Ⅲ. Internal leakage caused by the manufacturing quality of electric forged steel ball valve

Forged steel valve manufacturers do not strictly control valve material, processing technology, assembly technology, etc. in the production process, resulting in unqualified sealing surface grinding, and the products with defects such as pitting and trachoma are not completely eliminated, resulting in the electric forged steel ball valve. leak.

Solution: Rework the sealing surface.

Ⅳ. The control part of the electric forged steel ball valve affects the internal leakage of the valve

The traditional control method of electric forged steel ball valve is through the valve limit switch, over-torque switch and other mechanical control methods. Because these control components are affected by the ambient temperature, pressure and humidity, it will cause valve positioning inaccuracy, spring fatigue, thermal expansion coefficient unevenness and other objective factors, then cause internal leakage of the electric forged steel ball valve.

Solution: Readjust the limit.

Ⅴ. Internal leakage caused by debugging problems of electric forged steel ball valve

Affected by the processing and assembly process, the electric forged steel ball valve generally has the phenomenon that the electric forged steel ball valve cannot be opened electrically after being closed manually. If the stroke of the electric control valve is adjusted smaller by the action position of the upper and lower limit switches, the electric control valve will not be closed tightly or the valve will not be opened. Adjusting the stroke of the electric forged steel ball valve larger will cause the over-torque switch protection action. If the action value of the over-torque switch is adjusted to be larger, there will be accidents such as hitting the deceleration transmission mechanism or hitting the valve, or even burning the motor.

In order to solve this problem, you can manually shake the electric control valve to the end when debugging the electric control valve, then shake it to the lower limit switch position of the fixed electric door in the opening direction, and then open the electric forged steel ball valve to the fully open position to set the upper limit switch location. In this way, the electric forged steel ball valve will not have the phenomenon that the electric forged steel ball valve cannot be opened by the electric power after being manually closed, so that the electric forged steel ball valve can be opened and closed freely, but it will cause the electric forged steel ball valve to leak.

Since the action position of the limit switch is relatively fixed, the continuous scouring and wear of the valve by the medium controlled by the valve during operation will also cause internal leakage caused by the valve being closed loosely, even if the electric control valve is adjusted ideally .

Solution: Readjust the limit.

The post Analysis and Solution of Internal Leakage of Electric Forged Steel Ball Valve appeared first on ZECO Valve.

Main Application and Performance Characteristics of Pneumatic Forged Steel Ball Valve

Jerry — Wed, 22 Jun 2022 07:16:35 +0000

Ⅰ. Pneumatic forged steel ball valve main applications

Pneumatic forged steel ball valves are widely used in petroleum, natural gas, medicine, food, hydropower, nuclear power, drainage, heating, metallurgy, and other industries. They are vital mechanical products for national defense construction.

Pneumatic forged steel ball valve has many advantages. The ball valve has vital functions, large circulation capacity, light weight, small size, reliable performance, remote control, etc. It is a good product for throttling, through-transfer and can regulate the flow.

Pneumatic forged steel ball valve sealing performance is also particularly strong. It can be divided into two forms: resilient seal and metal seal. A resilient seal valve means that the seal of the electric ball valve can be attached to the valve. And service life of metal seal form of the valve in general will be much longer than the resilient seal type of valve. Excellent sealing ability can well block the entry of air and maintain the internal sealing. That’s why many companies choose to use it in industrial automation.

Pneumatic forged steel ball valve is evolved from the plug, its opening and closing member is a ball, the use of the ball around the axis of the stem rotation 90° to achieve open and close. Pneumatic forged steel ball valve in the pipeline is mainly used to cut off, change the direction of media flow.The V-shaped opening of the ball valve also has a good flow regulation function.

The pneumatic forged steel ball valve has a simple structure, good sealing performance, and smaller volume in a certain nominal diameter range, light weight, less material consumption, small installation size, and small driving torque. It is easy to operate to achieve rapid opening and closing.

Ⅱ. The characteristics of pneumatic forged steel ball valve

1. A locking hole is provided in the valve’s fully open and fully closed position to prevent misoperation by non-staff.
2. Set up steps in the lower part of the valve stem, in case of the valve internal pressure abnormal rise off the stem.
3. A fire-resistant sealing ring between the ball and the valve seat. The burned valve seat is still has a sealing role.
4. Rapid switching, flexible opening and closing, long service life, safe and reliable.
5. Pneumatic forged steel ball valves can be controlled centrally from a distance, and can meet the needs of computer program control.
6. The fluorine plastic lining layer of the ball valve, with chemical stability, is suitable for any strong corrosive chemical media.
7. The use of full-pass floating ball valve structure, leak-free closure in the entire pressure range. It is convenient for the pipeline system to sweep the line and maintain the pipeline.

The post Main Application and Performance Characteristics of Pneumatic Forged Steel Ball Valve appeared first on ZECO Valve.

Knowledge of Flange Forged Steel Ball Valve

Jerry — Tue, 21 Jun 2022 06:30:37 +0000

1. All valves of flange forged steel ball valve are designed as a whole

There is a mounting flange on the top of the valve body, conforming to the International Organization for Standardization standard ISO5211, for direct installation of actuators, limit switches, anti-leakage detection warning devices or extended handles.

The resilient seat design is leak-free under high and low pressure conditions and reduces wear and torque to operate the valve. More materials for customers to choose. Standard seat materials are virgin PTFE, glass-filled or carbon-filled PTFE.

Precision polished, durable forged steel ball valve features a pressure relief hole in its stem groove to equalize pressure in the valve cavity, ensuring tight valve closure and extending valve life.

2. The material of the valve body and valve trim of the flanged forged steel ball valve

The standard body material is 316 stainless steel and WCB, LCB type carbon steel. The ball and stem in the trim are 316 stainless steel. The valve stem has a built-in anti-static device, which ensures continuous contact between the valve stem and the valve body, the valve stem and the valve ball and forms a discharge circuit. The surface of the carbon steel valve is phosphating. And the surface of the stainless steel valve does not need to be treated.

3. All fire protection valves of flanged forged steel ball valves are equipped with flexible graphite body and graphite stem seals

The valve seat is an elastic material. In the event of a fire, an auxiliary machined metal ring will come into contact with the valve ball, preventing leakage.

Once the stem seal burns off, a machined, curved metal surface on the stem itself will act as a secondary sealing surface to prevent leakage. Valves are designed and manufactured in accordance with the relevant standards for use in special application conditions, and are suitable for use in various special media, such as dry chlorine, oxygen, hydrogen peroxide, ammonia, vacuum, steam, heat medium and low temperature conditions.

We will give the specifications of the forged steel ball valve and the control of the type of seat, operating temperature, medium and operating frequency at different pressures. For each seat material and actuator air pressure, room temperature water was used. Under different pressure drops, the valve torque test is carried out, and according to the test results, the torque value of the valve is calculated.

The above is the general content of this article. After reading this article, have you understood what you want to know? If you want to know more, please pay attention to our website, we will update some new content regularly for everyone to browse and read.

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Forged Steel Material – Forged Steel Ball for Forged Steel Ball Valve

Jerry — Tue, 21 Jun 2022 06:28:41 +0000

Valve is an indispensable process component in the fields of modern petroleum, chemical industry, and natural gas. It plays the role of diversion, cut-off, throttling, check, and diversion. However, since most of the working media of the valve are toxic or highly corrosive substances, once leakage occurs, casualties may occur, so the safety of the valve is particularly important.

Most of the medium passing through the valve has high pressure, a large temperature range, and strong corrosiveness, so the quality of the valve is very high. Only by facing up to the problems and hidden dangers in the quality inspection of the valve production process, and formulating corresponding measures, can the emergence of hidden safety hazards be avoided.

What is Forged Steel Material?

Forged steel is a material resulting from alloying iron and carbon under extremely high pressure. Forged steel has less surface porosity, a finer grain structure, more tensile and fatigue strength, and greater ductility than any other processed steel.

Steel forgings are made out of alloying carbon and iron. Forged steel is produced under extremely high, yet accurate, pressure. It has better ductility than other manufactured steel, possesses fatigue strength, more tensile, has an advanced grain structure, and has less surface porosity.

What is Forged Steel Ball for Forged Steel Ball Valve?

Our forged steel grinding balls commonly used low-carbon alloy, high manganese steel, high carbon, and high manganese alloy steel. On the basis of this material, we have developed a series of competitive and efficient patent forged grinding balls.

Production Process of Forged Steel Ball

Steel bars
- Production of the bar with the ideal chemical composition
Billet
- Modern high-quality ovens
Forging
- The forged ball with the highest mass found in the market
Quenching
- The thermal treatment process provides hardness to the product
Tempering
- This process eliminates the stress generated during the forging and quenching processes
Final Product
- Packed in super sacks (no additional cost)

Materials used for Metal Seated Forged Steel Ball Valve

It should be able to meet the pressure of the on-site medium and the mechanical properties of the medium. The material needs to have the ability to resist the chemical and physical properties of the medium, and also needs to consider the economy of the valve.

In some media environments, lower-cost materials can be selected to avoid waste. In some high-temperature and high-pressure medium environments, it is necessary to select high-cost high-temperature resistant materials to meet the on-site use environment.

In field use, it needs to meet the requirements of reliable installation and flexible and reliable action. All this is inseparable from the control of the production process. Because the valve has many parts and a complex structure, different parts are completed by different processing techniques. Such as casting, forging, machining, heat treatment, welding, and other processes.

The inspection methods of parts manufactured by different processes are also different. For example, forged parts are mostly inspected by non-destructive testing, while the heat treatment is inspected by hardness testing.

Generally speaking, the valve manufacturing quality of forged steel valve manufacturers includes the blank quality of parts, processing size requirements, surface roughness, and installation accuracy requirements.

Pressure Test of Metal Seated Forged Steel Ball Valve

This is an essential test for every valve. When performing a pressure test on the valve, the inspector must check carefully, and the holding time and pressure must meet the requirements.

In order to improve the production speed, some forged steel valve manufacturers shorten the pressure holding time of the valve or fail to meet the standard requirements, resulting in inaccurate pressure test inspection of the valve. There are also some inspectors who do not understand the upper seal inspection test in place during pressure inspection and confuse the upper seal and packing structure.

In fact, the upper seal test is mainly to test the conical and spherical hard seal between the forged steel ball valve stem and the upper seal seat on the basis of the valve is fully opened.

Recommendations for pressure testing: When looking for leaks, the inspector cannot use the pressure curve as the criterion for the failure of the valve, but needs to analyze the valve, so as to accurately find the leak location and analyze the cause.

Statistical work should be carried out for leakage points, pay attention to grasp the location of easy leakage, and timely feedback to relevant units. For the operation of the inspectors, it must be safe and reliable. It is necessary to let the inspectors understand the principle of the pressure experiment so that the inspectors can interpret the pressure experiment more accurately.

NBR Butterfly Valve

The post Forged Steel Material – Forged Steel Ball for Forged Steel Ball Valve appeared first on ZECO Valve.

SINOPEC Nanjing Engineering Construction Inc

Jerry — Mon, 20 Jun 2022 13:04:02 +0000

This project is a total investment of 2.75 billion yuan in 200,000 tons/year acrylic acid and ester project of CNOOC, which is contracted by SINOPEC Nanjing Engineering & Construction Inc. Its products are mainly used in environmental protection coatings, adhesives and super absorbent resins and other industries and fields.The project is completed and put into production, filling the gap of acrylic acid and ester industry in south China.

Contract & Production Field

Packing List:

Electric Ball Valve 10inch~20inch
Forged Steel Ball Valve 2inch~20inch
Gear Operated Gate Valve 10inch~24inch
Cast Steel Gate Valve 8inch~20inch
Metal Seated Ball Valve 8inch~12inch

Client Feedback:

The fast delivery time and high quality of ZECO valves make us feel at ease as the general contractor.

NBR Butterfly Valve