Month: September 2024

Working principle of pneumatic fluorine lined ball valve (diagram)

The pneumatic fluorine lined ball valve consists of a pneumatic piston actuator and an O-type fluorine lined ball valve. The inner cavity of the valve body and the disc plate are lined with corrosion-resistant and anti-aging polytetrafluoroethylene using high-pressure injection molding technology, thus possessing reliable corrosion resistance and sealing performance. Mainly used for regulating or cutting off strong corrosive media such as acid and alkali in the production process. Fluorine lined ball valves are mainly used for regulating or cutting off highly corrosive media such as acid and alkali during the production process. Widely used in automatic regulation and remote control systems in industries such as food, environmental protection, light industry, petroleum, papermaking, chemical, textile, and power.

Structural features:

The structure of the fluorine lined ball valve is a full bore floating ball type (two-stage) and a full bore fixed ball type (three-stage), mainly used to cut off or connect corrosive media in pipelines, and can be used for fluid regulation and control. Compared with other valve types, it has the following characteristics:

Low fluid resistance, smooth inner wall of lined ball valve, and unobstructed flow channel make it the valve with the lowest fluid resistance among all types of valves.

The switch is quick and convenient, simply rotate the sphere 90 ° to complete the account opening and closing actions.

Using a special molding process, the lining material is lined on the inner wall of the valve housing, which can withstand corrosion from strong acid and alkali media. The combination of lining spherical surface and PTFE valve seat has good sealing performance and achieves zero leakage.

Multiple drive devices such as pneumatic, electric, and hydraulic can be configured to achieve remote control and automated operation.

The sphere is integrated with the valve stem, eliminating the difference in rotation angle and eliminating the danger of the valve stem bursting out of the body due to pressure changes, ensuring the safety and reliability of use.

Fluorine lined ball valve body:

Type: Straight through cast ball valve

◆ Nominal diameter: 15-300mm

◆ Nominal pressure: PN1.0, 1.6Mpa

Flange standards: JB/T79.1-94, 79.2-94, etc

◆ Material: ZG230-450 lined with F46

◆ Upper valve cover: cast together with the valve body

Working temperature: -40 to+180 ℃;

◆ Cover type: bolt compression type

◆ Packing: PTFE packing

Internal components of fluorine lined ball valve:

Valve core type: Ball valve core

Valve core material: 2Cr13 lined with F46

◆ Traffic characteristics: Approximately equal percentage

Rated travel: fully open 90 °

Executing Agency:

Type: Pneumatic actuator, electric actuator

Gas supply pressure: 0.3-0.8Mpa

Air source interface: G1/4 ” G1/8〞、G3/8〞、G1/2〞

◆ Environmental temperature: -30~+70 ℃

Introduction to PZ644TC Pneumatic Ceramic Gate Valve (Figure)
The pneumatic ceramic gate valve adopts structural ceramics as the sealing pair, which is resistant to erosion and has good wear resistance. Open type double gate sealing structure, during the opening and closing process, the gate spins and has a polishing self-cleaning function. When the valve is closed, it seals in both directions and opens and closes flexibly. According to different working conditions, blowing ports and automatic blowing systems can be set up, suitable for conveying media such as dry ash, slag slurry, and materials, with minimal ash accumulation.
Pneumatic ceramic double gate valve, wear-resistant double plug valve product features
1. The gate, gate seat, and flow passage are made of high-performance structural ceramics, which are wear-resistant and have a long service life.
2. The unique structural design of the gate and gate rod allows the valve plate to spin during the process of valve closure.
This achieves self fitting sealing between the valve plate and the valve seat, as well as uniform wear of the valve plate, and can achieve long-lasting sealing performance in media with abrasive materials.
3. Satisfy multiple installation methods.
4. The design of the cavity completely avoids the problem of jamming
5. More than 200000 static tests in fly ash, with reliable sealing.
6. Can meet various transmission devices, manual, pneumatic, and electric.
Pneumatic ceramic gate valve, wear-resistant double plug valve application:
Ceramic discharge valves are used in the dry ash system and bin pump discharge transportation of thermal power plants. Bulk material conveying systems in industries such as chemical, metallurgical, papermaking, and pharmaceuticals. Z644TC ceramic discharge valve is suitable for power plant dry ash system, bin pump discharge transportation, and can also be used for opening and closing various types of dry dust, water and other media with wear and tear on pipelines in mining, papermaking, chemical industry, etc.

Z644TC-10C Pneumatic Ceramic Double Gate Valve Model Compilation Method Explanation:
Valve type code: “Z” represents reciprocating sliding gate valve
Transmission form code: “6” represents pneumatic
Connection form code: “4” represents flange connection, “7” represents clamp connection (our factory also has flanges for clamp valves, just like flange connections)
Structural form code: “4” represents parallel double gate
Sealing surface material code: “H” represents hard alloy seal, “TC” represents ceramic seal
Valve nominal pressure: Its value is 10 or 16 times the nominal pressure value in MPa
Valve body material code: “C” represents carbon steel

Working principle of 2507 duplex steel gate valve (diagram)
The opening and closing component of the 2507 duplex steel gate valve is the gate, and the movement direction of the gate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. When the gate valve is closed, the sealing surface can be sealed solely by the pressure of the medium, that is, the sealing surface of the gate is pressed against the valve seat on the other side by the pressure of the medium to ensure the sealing of the sealing surface. Most gate valves use forced sealing, which means that when the valve is closed, it relies on external force to forcefully press the gate plate against the valve seat to ensure the sealing performance of the sealing surface.
Characteristics of 2507 duplex steel gate valve
1. Compact structure, reasonable design, good valve rigidity, smooth channel, and small flow coefficient;

2. The sealing surface is made of stainless steel or hard alloy, with a long service life;

3. Using flexible graphite packing, reliable sealing, and easy and flexible operation;

4. Electric devices can be selected from ordinary switch type or intelligent control switch type;

5. The structural forms are elastic wedge single gate and rigid wedge single gate double gate.

Installation precautions and key points for 2507 duplex steel gate valve:
1. Handwheels, handles, and transmission mechanisms are not allowed to be used for lifting and collisions are strictly prohibited.

2. It should be installed vertically (i.e. the valve stem is in a vertical position and the handwheel is at the top).

3. Before opening a gate valve with a bypass valve, the bypass valve should be opened first (to balance the pressure difference between the inlet and outlet and reduce the opening force).

4. Install the gate valve with transmission mechanism according to the instructions in the product manual.

5. If the valve is frequently opened and closed, lubricate it at least once a month.

6. The installation position, height, and import/export direction must meet the design requirements, and the connection should be firm and tight.

7. All types of manual valves installed on insulated pipelines must not have handles facing downwards.

8. Install the gate valve with transmission mechanism according to the instructions in the product manual.

Working principle of C4 steel check valve for concentrated nitric acid (diagram)
The C4 steel check valve for concentrated nitric acid adopts an internal rocker arm rotary opening structure, and all opening and closing components are installed inside the valve body without penetrating the valve body. Except for the sealing gasket and sealing ring used in the middle flange, there is no external leakage point as a whole to prevent the possibility of leakage. The rocker arm and valve disc connection of the rotary opening check valve adopts a spherical connection structure, which allows the valve disc to have a certain degree of freedom within 360 degrees and appropriate micro position compensation. The C4 check valve has a simple structure, reliable operation, and lower fluid resistance than a lift check valve. It is suitable for use in larger diameter applications and can automatically open with the help of fluid pressure. This product is suitable for clean unidirectional media such as concentrated nitric acid at medium and low temperatures (≤ 50 ℃), nitric acid concentration ≥ 98%, various concentrated nitric acids below 50 ℃, and mixed acids of concentrated nitric acid and concentrated sulfuric acid in various ratios. It is not suitable for fluids containing solid particles and high viscosity.

2、 Main features of the product

Monomer structure, light weight, good rigidity, easy to maintain;
2. The thrust of the spring enables the valve disc to handle the closed position even when there is no medium pressure applied;
3. A good support method ensures that the valve disc and seat can be well aligned regardless of the installation position, so the valve can be installed at any angle;
4. The combination of the streamlined design of the valve sleeve and the streamlined design of the body cavity forms the streamlined flow channel of the axial flow check valve. Accurate calculation and design ensure sufficient flow area, low pressure loss, stable flow state, and no cavitation. The valve disc generates negative pressure and spring thrust when the medium flows, and returns to its seat without direct impact from the medium on the back of the valve disc; Therefore, check valves are low-noise valves;
5. The special surface treatment and structural design of the support at the front and rear ends of the valve disc and the valve disc shaft have overcome the jamming phenomenon that often occurs during the use of similar valves, ensuring smooth opening and closing; At the same time, it avoids the defects caused by gravity, such as valve disc misalignment, uneven force distribution on the sealing pair, and the inability of the sealing pair to fit between two actions, which affects the sealing performance. This ensures that the sealing pair is always in a good state of stress and fit;

6. The precise design uses spring thrust, which is slightly greater than the sum of the valve disc gravity and the friction force between the valve disc and the front and rear supports when the valve disc is in the closed position. The valve disc can be reseated and sealed at low pressure and any installation, and can also achieve low-pressure opening, reducing the starting load of the pump and protecting the safe operation of the pump.

3、 Main component materials of the product

Number, Part Name, Material Name

Valve body C4 steel 00Cr14Ni14Si4

Valve cover C4 steel 00Cr14Ni14Si4

Valve disc C4 steel 00Cr14Ni14Si4

1、 Working principle of pneumatic ball valve (diagram)
Pneumatic ball valve is a common control component that is modified through a plug valve. The difference is that the plug valve is circular, with a circular hole passing through its axis. So what is the purpose of pneumatic ball valves? What is the structure? Now let me explain to you.

2、 Pneumatic ball valve function

The working principle of pneumatic ball valves is to rotate the valve core to make the valve unobstructed or blocked. Pneumatic ball valve switches are lightweight, small in size, can be made into large diameters, reliable in sealing, simple in structure, easy to maintain, and the sealing surface and spherical surface are often in a closed state, which is not easily eroded by the medium. They are widely used in various industries.

Pneumatic ball valves and plug valves belong to the same type of valve, except that their closing element is a ball that rotates around the centerline of the valve body to achieve opening and closing.

Pneumatic ball valves are mainly used in pipelines for fast cutting speed, distribution, and changing the flow direction of media.

3、 Pneumatic ball valve structure

1. Floating pneumatic ball valve

The ball of a pneumatic ball valve is floating, and under the pressure of the medium, the ball can produce a certain displacement and press tightly against the sealing surface at the outlet end, ensuring the sealing of the outlet end.

The structure of the floating pneumatic ball valve is simple and has good sealing performance, but the ball bears all the load of the working medium and is transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. This structure is widely used for medium and low pressure ball valves.

2. Fixed ball pneumatic ball valve

The ball of a pneumatic ball valve is fixed and does not move under pressure. Fixed ball valves are equipped with floating seats, which move when subjected to medium pressure, causing the sealing ring to press tightly against the ball to ensure sealing. Usually, bearings are installed on the upper and lower shafts of the sphere, with a small operating torque, suitable for high-pressure and large-diameter valves.

In order to reduce the operating torque of pneumatic ball valves and increase the reliability of sealing, oil sealed ball valves have emerged in recent years. They inject special lubricating oil between the sealing surfaces to form an oil film, which enhances sealing performance and reduces operating torque, making them more suitable for high-pressure and large-diameter ball valves.

3. Elastic ball pneumatic ball valve

The ball of a pneumatic ball valve is elastic. The ball and valve seat sealing ring are both made of metal materials, and the sealing pressure ratio is very high. Relying on the pressure of the medium itself cannot meet the sealing requirements, and external force must be applied. This type of valve is suitable for high temperature and high pressure media.

An elastic sphere is obtained by creating an elastic groove at the lower end of its inner wall. When closing the channel, use the wedge-shaped head of the valve stem to expand the ball and press it against the valve seat to achieve sealing. Release the wedge-shaped head before rotating the sphere, and the sphere will return to its original shape, creating a small gap between the sphere and the valve seat, which can reduce friction and operating torque on the sealing surface.

Pressure reducing valve is one of the commonly used valves in industrial production pipelines, which is applied in various types of water, steam, and gas pipelines. According to the structural classification of pressure reducing valves, the vertical and horizontal installation diagrams of piston pressure reducing valves, diaphragm pressure reducing valves, and bellows pressure reducing valves are as follows:
Installation Atlas of YZQ-Z Steam Pressure Reducing Valve Group

Installation Atlas of YZQ-Q Gas Pressure Reducing Valve Group
Installation Atlas of YZQ-Y Oxygen Pressure Reducing Valve Group

Installation Atlas of YZQ-S Water Pressure Reducing Valve Group

A reducing valve is a valve that adjusts the inlet pressure to a desired outlet pressure and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance. By changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, resulting in different pressure losses and achieving the purpose of pressure reduction.

Structural characteristics and application scope of HTS single seat regulating valve (Figure)

The CV3000-HTS single seat regulating valve core adopts an upward guide structure, with a compact valve structure and S-shaped channels, which reduces pressure drop loss, increases flow rate, has a wide adjustable range, and high flow characteristic accuracy, in compliance with the IEC534-1-1976 standard. The leakage rate of the regulating valve complies with ANSI B16.104 standard. The regulating valve is equipped with a multi spring thin film actuator, which has a compact structure and high output force.
This product complies with GB/T4213-92.

Technical parameters and performance indicators

Valve body

Type: Straight through single seat cast spherical valve
Nominal diameter 40, 50, 65, 80, 100, 150, 200mm
Nominal pressure ANSI 125、150、300、600 JIS10、16、20、30、40K PN1.6、4.0、6.4MPa
Connection type: flange connection: FF, RF, RJ, LG
Flange standards: JIS B2201-1984, ANSI B16.5-1981, JB79-59, etc
Welding connection: socket welding SW (40-50mm), butt welding BW (65-200mm)
Material: Cast Steel (ZG230-450)
Cast stainless steel (ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti、ZG316L）、 Titanium, etc
Upper valve cover room temperature type (P): -17~+230 ℃ elongation type I (E Ⅰ): -45~-17 ℃+230~+566 ℃
Elongation type II (EII): -100~-45 ℃ Elongation type III (EIII): -196~-100 ℃
Note: The working temperature shall not exceed the allowable range of various materials
Cap type bolt compression type
V-shaped PTFE packing, PTFE impregnated asbestos packing, asbestos braided packing, graphite packing

Valve components

Valve core type: single seat plunger valve core
Material Stainless Steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L)
Stainless steel overlay welding with Si Tai Lai alloy, titanium, and corrosion-resistant alloys, etc

Executing Agency

Type HA multi spring thin film actuator
Diaphragm material nitrile rubber clip nylon cloth
Spring range 20-100, 80-240kPa
Gas supply pressure: 140-400kPa
Air source interface Rc 1 4
Environmental temperature -30~+70 ℃
Note: This valve can also be equipped with VA5 or VA6 and LVP type actuators.

Valve action type: gas closed or gas open

Attachment locator, air filter pressure reducer, holding valve, travel switch, valve position transmitter, handwheel mechanism, etc

Performance

Leakage metal valve seat: less than 0.01% of the rated capacity of the valve, in compliance with ANSI B16.104-1976 Class IV
Soft seat: 10-7 less than the rated capacity of the valve, in compliance with ANSI B16.104-1976 Class VI
Return differential locator: less than 1% of the full stroke
Without locator: less than 3% of the full stroke
Basic error band locator: less than ± 1% of the full stroke
Without locator: less than ± 5% of the full stroke
Note: When using standard V-shaped polytetrafluoroethylene packing

Adjustable range 50:1

Knife type slurry valve, also known as knife gate valve, is a new type of valve composed of a gate valve for opening and closing. The movement direction of the gate valve is perpendicular to the fluid direction, and the medium is cut off by a blade shaped gate valve that can cut fiber materials. The gate valve has two sealing surfaces, and the two sealing surfaces of the most commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate valve of the wedge type knife gate valve can be made as a whole, called a rigid gate valve; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate. The valve body actually does not have a chamber, and the gate plate rises and falls in the side guide groove, and is tightly pressed against the valve seat by the bottom protrusion. If high medium sealing performance is required, an O-shaped sealing valve seat can be used to achieve bidirectional sealing.

At present, the conventional parameters of domestic knife type slurry valves are as follows:
Valve body material: cast iron, cast steel, stainless steel
Valve Plate Material: 304316
【 Sealed valve seat 】: PTFE, welded STL
Pressure rating: 0.6-2.5MPa
[nominal diameter]: DN50-DN1200
[Structural Form]: Flat Plate Type
[Connection Method]: Clamp,
[Voltage Range]: 380V/660V 50/60HZ DC24V/12V+10% to -10%
[Temperature Range]: PTFE: -30~150 ° C, WCB: -30~425 ° C, 316L: -30~900 ° C
Electric actuator: switch type, adjustable type; Integral type, explosion-proof electric actuator

Manual ball valve is a commonly used fluid control valve, which consists of a sphere and a valve body. The sphere has a through hole inside, and the valve body has two through holes inside. There is a sealing ring between the sphere and the valve body. When the manual operation shaft rotates, the sphere will move inside the valve body, thereby changing the position of the through hole and controlling the flow rate of the fluid.

Characteristics of manual ball valve:

1. Manual ball valves have the characteristics of simple structure, easy operation, reliable sealing, high flow rate, low resistance, and strong corrosion resistance.

2. The operating handle of the manual ball valve can adjust the opening and closing of the valve, with simple operation and continuous adjustment.

3. The manual ball valve has good sealing performance, which can effectively prevent medium leakage and can be used for a long time.

4. The manual ball valve has a large flow rate, which can meet the demand for high flow rate, and has low resistance, which can effectively reduce the pressure loss of the pipeline.

5. Manual ball valves have strong corrosion resistance and can resist corrosion from various corrosive media, with a long service life.

Pneumatic ball valve is a commonly used device for controlling the flow rate of media. It consists of a spherical valve core and a valve seat, and the position of the valve core can be controlled by pneumatic control to control the flow rate of media. The advantages of pneumatic ball valves are their simple structure, flexible operation, continuous adjustment, strong corrosion resistance, applicability to various media, remote control, automatic control, and safe and reliable control.

1. The structure of a pneumatic ball valve mainly consists of a valve body, valve core, valve seat, valve stem, pneumatic control device, etc. The valve body is a container used to install the valve core, valve seat, and valve stem. The valve core is a component used to control the flow of the medium, the valve seat is a component used to support the valve core, the valve stem is a component used to control the valve core, and the pneumatic control device is a component used to control the valve stem.
2. The working principle of a pneumatic ball valve is that when the pneumatic control device controls the valve stem, the valve stem will push the valve core, and the valve core will move on the valve seat. When the valve core moves to a certain position, the medium flow rate will be controlled, thus achieving the purpose of controlling the medium flow rate.
3. Pneumatic ball valves have a wide range of applications, including controlling the flow of various media such as water, oil, gas, etc. They can be used in various industrial settings, such as petroleum, chemical, power, metallurgy, mining, thermal power, hot water, air conditioning, etc.
4. The advantages of pneumatic ball valves are their simple structure, flexible operation, continuous adjustment, strong corrosion resistance, applicability to various media, remote control, automatic control, and safe and reliable control. However, pneumatic ball valves also have some drawbacks, such as complex installation and maintenance, low control accuracy, high price, and poor wear resistance.
5. In summary, pneumatic ball valve is a commonly used device for controlling medium flow rate. It has the advantages of simple structure, flexible operation, continuous adjustment, strong corrosion resistance, can be used for various media, remote control, automatic control, and safe and reliable control. It can be widely used in various industrial occasions.

Electric ball valve is a commonly used device for controlling the flow of media. It consists of a valve body, valve core, valve seat, valve stem, electric control device, etc. It can be used to control the flow of various media, such as water, oil, gas, etc. It can be used in various industrial applications, such as petroleum, chemical, power, metallurgy, mining, thermal power, hot water, air conditioning, etc.

1. The working principle of an electric ball valve is that when the electric control device controls the valve stem, the valve stem will push the valve core, and the valve core will move on the valve seat. When the valve core moves to a certain position, the medium flow rate will be controlled, thus achieving the purpose of controlling the medium flow rate.
2. Electric ball valves have many advantages. Firstly, their operation is flexible, allowing for continuous adjustment, remote control, automatic control, safe and reliable control, and flexible operation to meet different control requirements.
3. Secondly, the control accuracy of electric ball valves is high, which can achieve precise control with high precision and meet different control requirements.
4. In addition, the installation and maintenance of electric ball valves are relatively simple, with a simple structure and easy installation and maintenance, which can save time and cost in installation and maintenance.
5. Finally, the electric ball valve has good wear resistance, which can meet different working conditions and extend its service life.
6. In summary, electric ball valve is a commonly used device for controlling medium flow. It has the characteristics of flexible operation, continuous adjustment, remote control, automatic control, safe and reliable control, high control accuracy, simple installation and maintenance, and good wear resistance. It can be widely used in various industrial occasions.

High pressure ball valve is a commonly used device for controlling the flow of media. It consists of a valve body, valve core, valve seat, valve stem, etc. It can be used to control the flow of various media, such as water, oil, gas, etc. It can be used in various industrial applications, such as petroleum, chemical, power, metallurgy, mining, thermal power, hot water, air conditioning, etc.
1. The working principle of a high-pressure ball valve is that when the valve stem pushes the valve core, the valve core will move on the valve seat. When the valve core moves to a certain position, the medium flow rate will be controlled, thereby achieving the purpose of controlling the medium flow rate.
2. High pressure ball valves have many advantages. Firstly, their structure is simple and easy to install and maintain, which can save time and cost in installation and maintenance.
3. Secondly, high-pressure ball valves have strong corrosion resistance and can be used in various media such as water, oil, gas, etc. They have strong corrosion resistance and can meet the requirements of different working conditions.
4. In addition, the operation of the high-pressure ball valve is flexible, it can achieve continuous adjustment, remote control, automatic control, safe and reliable control, flexible operation, and can meet different control requirements.
5. Finally, high-pressure ball valves have good wear resistance, which can meet different working conditions and extend their service life.
6. In summary, high-pressure ball valve is a commonly used device for controlling medium flow. It has the characteristics of simple structure, flexible operation, continuous adjustment, strong corrosion resistance, can be used for various media, remote control, automatic control, safe and reliable control, and good wear resistance. It can be widely used in various industrial occasions.