butterfly valve manufacturer Archives

Wafer Concentric Type Butterfly Valve (tanghai valve)

April 11, 2024

A wafer concentric type butterfly valve is a type of butterfly valve commonly used in various industries, including marine applications. Here’s a brief overview of its features, selection considerations, and usage:

Features:

Concentric Design: The wafer concentric butterfly valve features a concentric design where the stem passes through the center of the disc, ensuring a uniform seal around the circumference. This design minimizes turbulence and pressure drop while providing efficient flow control.
Wafer Style: These valves have a wafer-style body, which means they fit between two flanges without the need for additional bolts or nuts. This compact design saves space and facilitates easy installation and removal.
Resilient Seating: Most wafer concentric butterfly valves come with resilient seat materials such as EPDM or NBR, which provide excellent sealing properties and resistance to wear, corrosion, and chemicals.
Bidirectional Sealing: The concentric design allows for bidirectional sealing, meaning the valve can be installed in either direction without affecting its performance.
Manual or Actuated Operation: Wafer concentric butterfly valves are available in manual or actuated configurations. Manual valves are operated by hand, while actuated valves can be controlled remotely using pneumatic, electric, or hydraulic actuators for automated flow control.

Selection Considerations:

Size and Pressure Rating: Choose a valve size and pressure rating suitable for the intended application and operating conditions. Consider factors such as flow rate, system pressure, and compatibility with existing piping.
Material Construction: Select valve materials compatible with the fluid being handled and the environmental conditions. Common materials include stainless steel, carbon steel, ductile iron, and various alloys.
Seat Material: Consider the type of seat material (e.g., EPDM, NBR, PTFE) based on the fluid properties (e.g., temperature, viscosity, chemical compatibility) and sealing requirements.
Operation Type: Decide whether manual or actuated operation is preferred based on the level of automation required, accessibility, and control system integration.
Standards Compliance: Ensure the selected valve complies with relevant industry standards and certifications for quality, performance, and safety, such as ANSI, API, ISO, and marine classification societies’ requirements.

Usage:

Installation: Properly install the wafer concentric butterfly valve between flanges using appropriate gaskets and fasteners according to manufacturer specifications and industry standards.
Operation: Operate the valve manually or remotely using the designated controls, following established procedures for opening, closing, and adjusting the flow as needed.
Maintenance: Implement a regular maintenance schedule to inspect, clean, lubricate, and replace components as necessary to ensure optimal performance and longevity.
Monitoring: Periodically monitor the valve’s operation and condition for signs of leakage, wear, or malfunction, and take corrective action as required to prevent downtime or safety hazards.
Emergency Response: Establish protocols for responding to valve failures, leaks, or other emergencies, including shutdown procedures, isolation measures, and contingency plans to mitigate risks and minimize disruptions.

By considering these factors and following best practices for selection, installation, and maintenance, wafer concentric butterfly valves can effectively control flow and provide reliable performance in marine applications and other industrial settings.

Marine Butterfly Valve in the Application of Characteristics（Tanghai Valve）

October 23, 2023

The butterfly discs of the marine butterfly valve is installed in the diameter position of the ballistic path. Marine butterfly valve is easy to construct, small volume, light weight, only by the majority of more or less whole machine components. And as long as around 90 ° can quickly open and close, easy to operate, while the valve has excellent fluid mastery characteristics.

Marine butterfly valve in the closed position, the butterfly discs thickness is the only barrier when the medium flows through the valve body, so the pressure drop through the valve is very small, so there is a better flow control characteristic. Inertia sealing valve, the gasket can be set in the valve body or attached to the perimeter of the butterfly discs. Adoption of metal sealing valve is normally longer than inertia sealing valve life, but it is difficult to achieve complete sealing. Metal sealing can comply with the higher degree of task, inertia sealing is subject to the shortcomings of the degree of constraints.

If the marine butterfly valve as a flow control application, the main thing is to accurately choose the valve position and type. Marine butterfly valve construction principle is particularly suitable for the manufacture of large diameter valves. Butterfly valve is not only in alcohol, natural gas, chemical industry, ionization and other normal light industry to lose wide use, and also used in thermal power plant icing water fractions. For the clip type butterfly valve is to use the double head nut to butt the valve between the two ballistic flange, flange type butterfly valve is with flange on the valve, with the nut on the valve on the two ends of the flange is connected to the ballistic flange.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil,Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200,NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS.Standards: EN 593, API609, API6D.

Marine butterfly valve–Application of Marine Butterfly Valves

June 29, 2023

Marine butterfly valve is a kind of valve used to control or cut off fluid in liquid or gas flow pipeline on board. The characteristics of marine butterfly valves are simple structure, light weight, convenient operation, and good safety in use. Below, we will introduce marine butterfly valves in several aspects.

1、 Application of Marine Butterfly Valves

Marine butterfly valves are widely used for regulating and cutting off liquid flow and gas in various oil tankers, Chemical tanker, natural gas tankers, liquefied gas tankers and rescue ships. And it can also be applied in other equipment and pipelines, such as petrochemical, energy, metallurgy, power, water treatment and other fields.

2、 Structure of butterfly valve

Marine butterfly valves generally adopt a circular flat surface on the outside, and are composed of bent plates and closed gaskets on the inside. The valve stem and valve disc are rigidly connected through suitable mechanical connections, and the valve disc is configured into the pipeline to control the flow rate by relying on the flow force itself.

3、 Characteristics of Marine Butterfly Valves

（1）Simple structure, small size, light weight, and low flow resistance.

（2）Quick opening and closing, easy to operate, and reduces fluid switching time.

（3） Corrosion resistance, reliable sealing, and good leak prevention effect.

（4）Long service life and simple maintenance.

（5） Its special structural design ensures that it still retains the advantages of no combustion, leak prevention, and fire resistance under low pressure, small diameter, and critical conditions.

4、 Selection Method of Marine Butterfly Valves

When selecting a marine butterfly valve, it is necessary to consider parameters such as the nominal diameter, pressure rating, mode of action, and medium temperature of the butterfly valve. It is best to make a choice based on specific conditions.

It is necessary to consider the operating temperature and medium characteristics, and appropriate valve diameters and shear forces should be designed based on the flow speed of the medium, and appropriate materials or sealing forms should be selected.

5、 How to Use and Maintain Marine Butterfly Valves

When using marine butterfly valves, attention should be paid to the installation direction and the position of the blocking plate to ensure that the valve is straight and to avoid tilting damage and leakage during operation.

For the maintenance and upkeep of marine butterfly valves, it is necessary to conduct timely inspections, regularly lubricate the valve and its surrounding components, and clean the operating bearings, gaskets, sealing surfaces, and bearings. Special attention should be paid to key areas.

Finally, we need to regularly conduct statistics and analysis on the usage of marine butterfly valves, compare them with other similar equipment, identify problems in the operation of butterfly valves, and promptly handle them. Only by doing well in daily maintenance and paying sufficient attention can the normal operation of butterfly valves be guaranteed and their service life be extended.

Finally, we need to regularly conduct statistics and analysis on the usage of marine butterfly valves, compare them with other similar equipment, identify problems in the operation of butterfly valves, and promptly handle them. Only by doing well in daily maintenance and paying sufficient attention can the normal operation of butterfly valves be guaranteed and their service life be extended.
Tianjin Tanghai Valve Co., Ltd. is a professional marine valve manufacturer, including butterfly valve, check valve, gate /Knife gate valve. We have certificates: CE, ISO, BV, DNV foundry andproducts approval. Now we have our own independent R & D, manufacturing, assembly and warehousing workshops; we have professional pre-sale and after-sale technical support and perfect services.Below is our wafer butterfly valve of marine valves,if you need to check more information,please click here:https://www.tanghaivalve.com/wafer-type-butterfly-valve-th-btv-aw/.Please contact us if you need more support, please contact us freely: info@tanghaivalve.com.We are committed to “Build a top valve enterprise; Be a reliable partner!”
Friends from all over the world are welcome to visit us for evaluation, guidance, and orders!

Marine Valve for Mono Flange Butterfly Valve

May 31, 2023

Rubber Lined Butterfly Valve with Mono Flange(Single Flange)

Single Flange butterfly vlaves suitable for connecting standard and design standard is PN 10 normally.

Material of Mono flange butterfly valve

Marine Butterfly Valve,Ductile Iron Mono Flange;NBR/EPDM/Viton Lined,shaft stainless steel,Disc is alu-bronze or stainless steel.

Marine quality butterfly valve with a bonded NBR liner suitable for many duties including oils and hydrocarbons,Supplied bare shaft, please specify if lever, gearbox or actuator is required. The butterfly valve offers quick opening and closing with full flow in either direction and leak tight shut off. Flange gaskets not needed since the lining that extends onto the faces acts as a gasket.

Tianjin Tanghai Valve Co., Ltd. is a professional marine valve manufacturer, including butterfly valve, check valve, gate /Knife gate valve. Wehave certificates: CE, ISO, BV, DNV foundry and products approval. Now we have our own independent R & D, manufacturing, assembly and warehousing workshops; we have professional pre-sale and after-sale technical support and perfect services.

Below is our wafer butterfly valve of marine valves, if you need to check more information, please click here: butterfly valve : https://www.tanghaivalve.com/wafer-type-butterfly-valve-th-btv-aw/; https://www.tanghaivalve.com/double-flange-butterfly-valve-th-btv-df/

Please contact us if you need more support, please contact us freely: info@tanghaivalve.com.

We are committed to “Build a top valve enterprise; Be a reliable partner!”

Friends from all over the world are welcome to visit us for evaluation, guidance, and orders!

How to install wafer butterfly valve and installation tips

March 11, 2022

Title: How to install wafer butterfly valve

In this article, let’s talk about the installation method of the wafer butterfly valve. Wafer type is a connection method of butterfly valve, that is, when installing on the pipeline, it is necessary to clamp the butterfly valve with two pieces of flanges, and then connect it with the flange on the pipeline. Corresponding to it is another connection method of butterfly valve, flange type. The installation of flanged butterfly valve will be shared with you in the future. Today we mainly talk about how to install the wafer butterfly valve in the form of pictures and texts.

JIS 10K-wafer butterfly valve-backup seat (4)

The structure of the wafer butterfly valve is relatively short and takes up little space. During installation, use the special flange for the wafer butterfly valve to fix it, and then put the fixed wafer flange into the middle of the flanges at both ends of the pipeline, and use bolts to fix it. The control of the fluid medium in the pipeline can be realized by fixing it through the special flange of the wafer butterfly valve and the pipeline flange (if there is no flange on the pipeline, the special flange for the butterfly valve needs to be welded on the pipeline). The wafer type butterfly valve occupies a small space, which makes it especially suitable for installation and use in situations where the space is narrow or the distance between pipes is relatively small.
The specific installation steps of the wafer butterfly valve are as follows:
1. Place the wafer butterfly valve between the two pre-installed special flanges for wafer butterfly valves, and pay attention to align the flange bolt holes with the round holes of the butterfly valve body.

2. Insert the bolts and nuts into the flange holes to connect the valve body and the flange, and correct the flatness in the method, but be careful not to overtighten the bolts and nuts.

3. Weld the flange on the pipe, this step should be done by spot welding.

4. Remove the wafer butterfly valve first.

5. Weld the two flanges on the pipe completely to complete the fixation.

6. After the weld between the flange and the pipe is cooled, install the wafer butterfly valve. At this time, pay attention to opening the butterfly plate a little.

7. Correct the installation position of the butterfly valve again, and tighten the bolts, but be careful not to over-tighten them.

8. Fully open the butterfly plate of the butterfly valve to ensure that the butterfly plate of the butterfly valve can be opened and closed freely.

9. Cross the bolts again and tighten them evenly;

10. After the above steps are completed, test the opening and closing of the butterfly valve again to ensure that the valve can open and close freely.

The above is the introduction of butterfly valve installation steps. Here, I would like to tell all friends who purchase butterfly valves. Before installing the wafer butterfly valve, pay attention to the handling and do not bump it at will. After installation, non-professionals should not disassemble it casually.

Double offset-wafer butterfly valve-D72F-150lbC (1)

Manual wafer butterfly valve installation skills

1. Storage work before installation: Store the manual wafer butterfly valve in a cool, dry and ventilated environment, and cover the valve to prevent the valve from being contaminated with dust and all debris.
2. Before the wafer butterfly valve is installed on the pipeline, the pipeline needs to be calibrated, and the positions of the pipes at both ends cannot be deviated. Body strain or rupture.
3. Before the valve is installed, the valve and all installed pipelines should be cleaned again to ensure that the inside of the valve and the pipeline is completely clean, and no dust is left.
4. Manual wafer butterfly valve belongs to manual butterfly valve, which requires frequent manual operation. Therefore, there are also requirements for the installation position of the manual butterfly valve. The installation position of the valve must be convenient for personnel to operate and maintain in the future. It has been demonstrated that the best position for manual valve installation is about 1.2 meters from the operating floor. For valves installed outdoors, cover the valve with some covering to prevent bad weather from affecting the valve.
5. When installing on the pipeline, make sure that the butterfly plate is in a closed state, so as to avoid collision and damage between the butterfly plate and the pipeline flange, which will affect the sealing performance.
6. After the manual wafer butterfly valve is installed, if there is an opening and closing failure during use, it is necessary to find out the cause and eliminate the failure. It cannot be forced to open and close by beating, prying or brute force.
The above is the whole content of the “manual wafer butterfly valve installation skills” introduced for you. Here, the editor also reminds everyone that after the valve is installed, it must be regularly maintained during the use of the valve. work, so as to ensure the normal and smooth operation of the valve. If you have purchase requirements for manual wafer butterfly valves, you are welcome to consult the official website of Tanghai Valve.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Video of center-lined butterfly valve:

Video of double eccentric butterfly valve:

Application of double eccentric butterfly valve and triple eccentric butterfly valve

December 29, 2021

Butterfly valves can be divided into centerline butterfly valves, single eccentric butterfly valves, double eccentric butterfly valves and triple eccentric butterfly valves. These butterfly valves are widely used in our production and life. Because of some defects of the centerline butterfly valve itself, it is not suitable for the environment where the temperature and pressure are too high or too low, so the butterfly valve is continuously improved, and this is the new design of single eccentric, double eccentric, and triple eccentric. Improvement is a breakthrough. Nowadays, the

Double eccentric-lug butterfly valve-D72F-150lbP-stainless steel (4)

application range of double eccentric butterfly valve and triple eccentric butterfly valve is wider and wider. This article will introduce the application of double eccentric butterfly valve and triple eccentric butterfly valve.

Application of double eccentric butterfly valve
The double eccentric butterfly valve is designed with eccentric structure and is widely used in the fluid pipeline system of water supply and drainage, sewage, construction, petroleum, chemical, textile, paper, hydropower, metallurgy, energy and other projects for regulation and interception.
Under normal circumstances, the seat material of the double eccentric butterfly valve is made of tetrafluoroethylene, which can effectively prevent corrosion. In addition, metal sealing seat can also be used to adapt to the high temperature environment. However, the double eccentric butterfly valve adopts metal sealing seat. The sealing surface of the butterfly plate and the seat is in line contact. The seal is a positional sealing structure. This sealing structure cannot withstand high pressure. If used in high pressure conditions, it will cause a lot of leakage. Therefore, do not use double eccentric butterfly valves with metal seal seats in high-pressure working environments or systems that require tight shut-off.

Application of triple eccentric butterfly valve

triple eccentric butterfly valve-lug

The triple eccentric butterfly valve is currently the most technologically advanced butterfly valve. It not only absorbs the advantages of other butterfly valve products, but also avoids the shortcomings of other butterfly valves, and has been valued by more and more users and technicians. The triple eccentric butterfly valve has a lot of leeway in the selection of sealing materials, and can deal with corrosive media such as high and low temperatures and various acids and alkalis. In addition, the triple eccentric butterfly valve can achieve zero leakage and is particularly suitable for making large-diameter valves. When used as a cut-off valve, it can replace gate valves and ball valves; when used as a flow adjustment, it can replace bulky shut-off valves.
At present, triple eccentric butterfly valves are used in important pipelines in large industrial fields such as petroleum exploration, petroleum refining, petrochemical, and energy power generation. As people continue to study, it is believed that triple eccentric butterfly valves will be applied to more and more fields.
If you want to know more about double eccentric butterfly valve and triple eccentric butterfly valve, please visit the official website of “Tanghai Valve”. If you have valve requirements in this area, you are also welcome to inquire and order.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D.
Video of center-lined butterfly valve: https://youtu.be/NuSZH_AJcwY
Video of double eccentric butterfly valve: https://youtu.be/yOw2xp3bIaE
Video of triple eccentric butterfly valve: https://youtu.be/AkRwg2X1Wh0

How to replace valve packing for triple eccentric sealing butterfly valve

November 19, 2021

Although we are not focusing on valve packing during the procurement and use of triple eccentric butterfly valves, in fact packing has a great influence on the service life of the valve. If we find that the upper cavity is leaking during the pressure test, it is likely to be caused by the leakage of the packing. Wrong type of packing, packing leakage will cause internal leakage and greatly affect the service life.

D673H-16C-stainless steel pneumatic triple eccentric butterfly valve

There are many reasons for packing leakage. For example, the packing is the sealing effect of the pressure of the gland in the valve. After operation, the packing will age and become hard, especially the frequently used triple eccentric sealing butterfly valve, the friction between the valve stem and the packing is reduced, and it is easy to leak water and steam. At this time, the valve packing needs to be replaced. In normal times, we also need to regularly replace the valve packing through the investigation. Let’s take a look at how to replace the valve packing.
When replacing the packing for the triple eccentric sealing butterfly valve, for small valves with gland nuts, you can use a wire hook to clean the packing, put the asbestos rope clockwise around the valve stem and re-install the packing surface, and then tighten the gland nut. . Do not use excessive force when installing the nut to prevent tripping or breakage. If it still leaks after replacement, tighten it again until it does not leak. For large valves with flange glands, square or round asbestos ropes braided into strands can be cut into small sections according to the required length and laminated, and the joints of each layer should be staggered by 180°. When tightening the gland, the bolts on both sides should be compressed alternately to prevent the gland from breaking due to uneven force, and the rotation of the valve skewer should be checked to ensure the flexible rotation of the valve stem.
It is important to mention here that many developed countries do not allow the use of asbestos-containing valves. This is because asbestos has slight carcinogens, so triple-eccentric sealing butterfly valves with asbestos plates on the sealing surface are firmly not allowed to be used in drinking water. It can be considered to use full graphite or 314 or tetrafluoroethylene instead.
The triple eccentric sealing butterfly valve is widely applicable and easy to use. It has the advantage that it can be applied to a variety of working conditions by replacing the sealing pair, which is very popular. Need triple eccentric sealing butterfly valve, welcome to consult the brand manufacturer Tanghai Valve, who has rich experience in the production and processing of butterfly valve products, and there are many cases. I believe you will find your favorite products here.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Installation and Maintenance of Butterfly Valve

August 13, 2021

The butterfly valve has become one of the most widely used valves. Although it is only a small part on the fluid pipeline, it has a very large effect. The installation and maintenance of butterfly valves is a science. The correct installation of butterfly valves is the first step to ensure the normal operation of the pipeline, and subsequent maintenance has a positive effect on prolonging the service life of butterfly valves and reducing production costs. This article will talk about the installation and maintenance of butterfly valves for you.

lug type butterfly valve, ductile iron, center lined,

The working principle of butterfly valve
The working principle of the butterfly valve is that the valve stem drives the rotation of the butterfly plate to complete the opening and closing, and the rotation angle is 90°; changing the deflection angle of the butterfly plate can control the flow of the medium. Common butterfly valves include wafer butterfly valves and flange butterfly valves. Wafer type butterfly valve uses double-head bolts to connect the valve between two pipeline flanges. Flange type butterfly valve has flanges on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipeline flanges. Butterfly valve allows fluid speed: liquid ≤ 4.5 m/s, gas ≤ 20 m/s.

Installation direction and position of butterfly valve

ductile iron, DI, butterfly valve, manufacturer, center line, TH valve

Butterfly valves generally have no direction requirements. If required, it should be determined according to the rotation angle of the butterfly valve and the working principle of the pneumatic actuator. The best position of the valve installed on the horizontal pipeline is vertical installation, and vertical downward is not allowed. The valve installation position must be easy to operate; timely installation is temporarily difficult, and the operator must also consider the long-term work of the operator. It is best to keep the valve hand wheel flush with the chest, generally 1.2 meters away from the operating floor, so that it is easier to open and close the valve. The handwheel of the floor valve should be upward, not tilted. For valves that lean against the wall against the equipment, leave room for the operator to stand on. It is necessary to avoid operating from the sky, especially acid-base, toxic media, etc., otherwise it is very unsafe.

Maintenance work of butterfly valve
When maintaining the butterfly valve, pay attention to whether there is water in the pneumatic actuator mechanism. In the wet season, the accumulation of water in the air compressor tank makes the transmission mechanism or the transmission shaft sleeve rust, and the accumulation of water in the air compressor tank in the cold winter weather enters the pneumatic actuator mechanism and freezes, causing aerodynamics. When the actuator is operated, the torque is too large, which damages the transmission components and cannot be operated manually; if the actuator is operated forcibly, the internal parts of the actuator will also be damaged. During maintenance, the discharge valve in the air compressor tank should be opened from time to time and the internal water should be taken out. For butterfly valves with hand wheels, open the turbine box cover to check whether the lubricating oil is normal within 6 months of operation, and keep a proper amount of lubricating oil.

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Pneumatic butterfly valve model name coding method

August 3, 2021

Pneumatic butterfly valve model preparation method, code naming method, only in China
Pneumatic butterfly valve is one of the most common valves in industrial piping systems. It has the functions of switch cut-off, proportional adjustment, and emergency cut-off. It also has rapid switching, simple structure and

ductile iron, DI, butterfly valve, manufacturer, center line, TH valve

easy maintenance. It is used more and more on low-pressure large and medium-diameter pipelines. ! However, due to the various connection methods and structural forms of pneumatic butterfly valves, many people are often uncertain when choosing butterfly valve models. In order to reduce this situation, our company provides pneumatic butterfly valve model compilation instructions for everyone. Reference and understanding!
Pneumatic butterfly valve model preparation instructions include the addition of additional conditions for the butterfly valve, the difference in connection methods, the upgrade of the transmission mode, the change of the structure, the level of valve pressure, and the requirements for temperature, pressure, corrosion and material. Hope It is helpful to everyone in the selection! To
Pneumatic butterfly valve model representation method:
Additional codes for pneumatic butterfly valves: BD thermal insulation butterfly valve, SD telescopic butterfly valve, TLD desulfurization butterfly valve, DH check butterfly valve, DKS fast butterfly valve, FDBD square louver butterfly valve;
The code of the butterfly valve: D represents the butterfly valve;
Transmission form code: manual (omitted), 3 means turbine drive, 6 means pneumatic drive, 7 means hydraulic, 9 means electric;
Code of connection mode: 4 flange type, 6 welding, 7 pair clamp type; Structure code: 1 means centerline type, 2 means double eccentricity, 3 means triple eccentricity, 4 means variable eccentricity, 5 means single eccentricity;
Sealing material code: H stainless steel, X rubber, F polytetrafluoroethylene, FX composite rubber, M Monel alloy, Y cemented carbide, W valve body directly processed;
Pressure grade code: 10=PN1.0Mpa, 16=PN1.6, 25=PN2.5, 40=PN4.0, PN is the code of domestic pressure, MPA is the unit of pressure, one kilogram is equal to 0.1Mpa; Class150LB=1.6 mpa, 300LB=2.5-4.0mpa, Class is the American standard code, LB is the American standard pound unit. Shell material code: C cast steel, P stainless steel 304, R stainless steel 316, AL special alloy steel, Z cast iron, Q ductile iron, N nylon. The above are common butterfly valve related codes. For products that need to be customized due to special working conditions, they can be selected according to the design plan.
Pneumatic butterfly valve model compilation instructions:

D673H-16C-stainless steel pneumatic triple eccentric butterfly valve

D673H-16C Stainless steel pneumatic wafer triple eccentric butterfly valve
D: Represents butterfly valve;
6: Indicates that the transmission mode is pneumatic;
7: The connection method is a wafer connection;
3: The structure is triple eccentric;
H: The sealing material is stainless steel;
16: Indicates that the nominal pressure is 1.6MPa;
P: Indicates that the valve body is made of stainless steel.
Related valve model: Electric butterfly valve model Electric ball valve model Pneumatic ball valve model

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Working principle diagram of electric butterfly valve

August 2, 2021

Working principle diagram of electric butterfly valve
With the rapid development of my country’s industrial manufacturing industry, the demand for valves is also getting higher and higher, especially the use of electric butterfly valves and electric ball valves, which are the most prominent among many valves, and belong to the more common types of pipelines! The electric butterfly valve, as a component used to realize the on-off and flow control of the pipeline system, makes it more and more widely used in practical applications with its excellent quality and performance!

D943H-16C-metal seated stainless steel electric triple offset butterfly valve

According to different connection methods, electric butterfly valves can generally be divided into the most common electric wafer butterfly valves and electric flange butterfly valves. The sealing materials include soft seal (normal temperature and pressure) and hard seal (high temperature and high pressure). The working power supply usually includes: AC220V, AC380V, DC24V, the input signal has 4~20mA 0~10v and other weak current signals. Finally, according to the control form, it is divided into switch type and regulation type. The switch type functions as a switch; the regulation type is used to adjust the flow rate, which can be accurate Adjusting the flow rate to thousand divisions is also a relatively expensive valve.
Working principle of electric butterfly valve:
The electric butterfly valve uses electric energy as the driving force, and the valve stem is driven by the electric device to make the butterfly plate produce a 90° rotation to achieve the opening and closing of the valve. It can also receive 4-20mA or other signals from the industrial automation control system to accurately control the valve opening. , So as to achieve the adjustment and control of different process parameters such as flow, temperature and pressure.
Related knowledge: dynamic diagram of butterfly valve working principle
Recommended products: Electric regulating butterfly valve Electric triple eccentric butterfly valve

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Posts

Wafer Concentric Type Butterfly Valve (tanghai valve)

Marine Butterfly Valve in the Application of Characteristics（Tanghai Valve）

Marine butterfly valve–Application of Marine Butterfly Valves

Marine Valve for Mono Flange Butterfly Valve

How to install wafer butterfly valve and installation tips

Application of double eccentric butterfly valve and triple eccentric butterfly valve

How to replace valve packing for triple eccentric sealing butterfly valve

Installation and Maintenance of Butterfly Valve

Pneumatic butterfly valve model name coding method

Working principle diagram of electric butterfly valve

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