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bellows globe valve structure and features

July 9, 2021

Bellows globe valve structure (picture), the function and characteristics of bellows globe valve
Bellows globe valve structure:
Bellows cut-off valve is mainly filled with a bellows seal. The upper part of the outer surface of the bellows is welded to the valve body to form a closed space in which the liquid is contained. The valve stem is inserted into the bellows, and the bottom of the bellows is connected to the valve core. The expansion and contraction of the bellows controls the opening of the valve core. Therefore, if the bellows does not crack, there can be no leakage. The bellows has a very high sealing reliability and can be used in toxic media or gases. Such as chlorine. Prevent leakage.

Globe valve (9)

Structural characteristics of bellows globe valve:
1. Double sealing design (bellows + packing) If the bellows fails, the stem packing will also avoid leakage and meet international sealing standards
2. There is no fluid loss, reducing energy loss and improving plant equipment safety
3. Long service life, reduce maintenance times and lower operating costs
4. Rugged and durable bellows seal design to ensure zero leakage of the valve stem and provide maintenance-free conditions
5. The gas medium valve seat adopts PTFE soft sealing material to improve the sealing performance of this valve
6. High temperature resistance≤425℃The valve seat adopts conical hard seal. Achieve airtight performance and zero leakage

The function of the bellows globe valve:

The function of the bellows in the globe valve is to seal and prevent the medium from leaking from the valve stem. The lower end of the bellows and the valve stem are connected by sealing welding, the upper end and the gland are connected by sealing welding, and the gland is connected with the upper Metal spiral wound gaskets are generally installed between the flanges to ensure sealing. The bellows shut-off valve is extremely tight and rarely leaks.

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 ball valve principle, structure and working principle

July 7, 2021

Principle of Pneumatic Ball Valve|Structure, Principle of Pneumatic Ball Valve
Pneumatic ball valve is a combination of pneumatic actuator and ball valve, instead of manual operation, not only saves a lot of manpower and material resources, but also can control multiple ball valves at the same time. The actuator work of the pneumatic ball valve drives the valve body to open and close quickly, and the speed can achieve the effect of cutting off within seconds. The execution speed of pneumatic actuators is relatively fast, the fastest switching speed is 0.05 seconds/time, so it is usually called pneumatic fast cut-off ball valve.

pneumatic ball valve

The pneumatic actuator of the pneumatic ball valve is mainly divided into single-acting and double-acting. The pneumatic head is equipped with accessories such as triple pieces, positioners, limit switches, etc., which can be used as a throttle to adjust the flow. At the same time, the control box can be added to control the switch in the remote control room.

Working principle of pneumatic ball valve:
The pneumatic ball valve only needs to enter the pneumatic actuator through compressed air, the air source drives the ball core to rotate 0-90 degrees and the small turning torque can control the switch of the ball valve. The valve positioner can be assembled according to the working conditions to control the ball valve. The opening of the core is used to adjust the medium flow. The sphere rotates around the centerline of the valve body to achieve opening, with a circular through hole or channel passing through its axis. When the center of the ball rotates to 90°, the valve is in a tightly closed state. When the actuator is working, the valve can be tightly closed with only a small torque, so that the principle of rapid cut-off can be achieved.

pneumatic V type ball valve

Pneumatic ball valve structure classification:
Pneumatic ball valves can be divided into on-off type pneumatic ball valves and regulating-type pneumatic ball valves according to the difference in structure. The on-off type has only two actions of opening and closing, while the regulating type can control the flow rate!
1. The valve core of the on-off pneumatic ball valve is generally an O-type ball core, and the O-type ball valve spool is a floating precision casting. The diameter of the flow channel is the same as that of the pipeline, and it is mainly used as a cut-off switch.
2. The valve core of the adjustable pneumatic ball valve is a V-shaped ball core, which adopts a fixed structure, with a V-shaped cut on the ball core. Adding a positioner to the actuator can realize the proportion adjustment of fiber-containing and granular media.

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 ball valve installation instructions

July 5, 2021

Pneumatic ball valve installation instructions
Before installing the pneumatic ball valve:
1. Ensure that the installation position of the pneumatic ball valve is that the pipeline is in a coaxial position. The two flanges on the pipeline should be kept parallel. Confirm that the pipeline can bear the weight of the pneumatic ball valve.

pneumatic ball valve

2. Confirm whether there are impurities, welding slag, etc. in the pipeline, and the pipeline must be purged.
3. Check the nameplate of the pneumatic ball valve, and perform full-open and full-close operations several times to confirm that the valve can work normally, and then check all the details of the valve thoroughly to ensure that the valve is intact.
4. Remove the protective covers at both ends, check whether the valve body is clean, and clean the inner cavity of the valve body. Since the sealing surface of the pneumatic ball valve is spherical, even tiny debris may cause damage to the sealing surface.

Installation of pneumatic ball valve:
1. Install a gasket between the pneumatic ball valve flange and the pipeline flange according to the pipeline design requirements.
2. The bolts on the flange should be tightened symmetrically, successively and evenly.
3. When the ball valve adopts a pneumatic actuator, complete the installation of the air source according to the instructions.
4. Any section of the pneumatic ball valve can be installed at the upstream end, and the handle pneumatic pipe ball valve can be installed at any position of the pipeline. If the ball valve of the electro-pneumatic actuator is configured, it must be installed vertically, and the inlet and outlet of the valve are in a horizontal position.
Inspection after installation of pneumatic ball valve:
1. After installation, start the pneumatic ball valve to open and close several times, it should be flexible, uniform force, and the pneumatic ball valve should work normally.
2. According to the design requirements of pipeline pressure, test the sealing performance of the joint surface of the pneumatic ball valve and the pipeline flange after pressure is applied.

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

Types and classifications of ball valves

July 2, 2021

Types and classifications of ball valves
A ball valve is a valve with a sphere as a closing part. It is mainly composed of a valve body, a valve seat, a sphere, a valve stem, and a handle (or other driving devices, such as electric actuators, pneumatic actuators or hydraulic actuators). The valve stem drives and rotates around the axis of the ball valve. It is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline.

fixed ball valve

For the wide variety of ball valves, including the different working principles, use media and application places, users should choose different types of ball valves corresponding to the requirements of the working conditions. The types of ball valves are classified according to the actual working conditions on site.
According to the structure, it can be divided into:
1. Floating ball valve The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure that the outlet end is sealed. The floating ball valve has a simple structure and good sealing performance, but the load of the sphere bearing the working medium is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the sphere medium. This structure is widely used in medium and low pressure ball valves.

Pneumatic electric high platform ball valve

2. Fixed ball valve The ball of the ball valve is fixed and does not move after being pressed. The fixed ball valve is equipped with a floating valve seat. After the pressure of the medium, the valve seat moves, so that the sealing ring is pressed tightly on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high-pressure and large-diameter valves. In order to reduce the operating torque of the ball valve and increase the usability of the seal, oil-sealed ball valves have appeared in recent years. Special lubricants are injected between the sealing surfaces to form an oil film, which enhances the sealing performance and reduces the operating torque. , It is more suitable for high-pressure and large-caliber ball valves.
3. Elastic ball valve The ball of the ball valve is elastic. The sphere and the valve seat sealing ring are made of metal materials, and the specific pressure of the seal is very large. According to the pressure of the medium itself, it has not reached the sealing requirements, and external force must be applied. This valve is suitable for high temperature and high pressure media. The elastic sphere is made by opening an elastic groove on the lower end of the inner wall of the sphere to obtain elasticity. When closing the passage, use the wedge-shaped head of the valve stem to expand the ball and press the valve seat to seal. Loosen the wedge-shaped head before rotating the ball, and the ball will return to its original shape, so that there is a small gap between the ball and the valve seat, which can reduce the friction of the sealing surface and the operating torque.
The commonly used ball valve classification methods are as follows:
According to pressure: high pressure ball valve, medium pressure ball valve, low pressure ball valve
According to the runner type: full bore ball valve, reduced bore ball valve
By channel position: straight-through, three-way, right-angle
According to the temperature: high temperature ball valve, normal temperature ball valve, low temperature ball valve, ultra-low temperature ball valve According to the sealing form: soft sealing ball valve, hard sealing ball valve
Assembly by stem: top-mounted ball valve, side-mounted ball valve
According to the connection form: flange ball valve, welded ball valve, threaded ball valve, clamp ball valve
According to the driving mode: manual ball valve, automatic control ball valve (pneumatic ball valve, electric ball valve, hydraulic ball valve)
According to the size of the caliber: super large caliber ball valve, large caliber ball valve, medium caliber ball valve, small caliber ball 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

Electric globe valve model coding method

July 2, 2021

Representation method of electric shut-off valve model in China. Globe valve is also called cut-off valve or stop valve.
As a cut-off valve, the electric shut-off valve is the most widely used and one of the most important valves. It is not only suitable for medium and low pressure pipelines, but also for high pressure places, and is relatively durable. It

Globe valve (9)

relies on electric thrust to control the flow of the medium. However, since there are many types of electric shut-off valves and their structural forms are changeable, users should be familiar with the expression method of their model preparation when choosing electric shut-off valves, so as to avoid problems such as selecting the wrong type, replacing goods and returning goods!
The description of the electric shut-off valve model is represented by the code of the shut-off valve type, drive mode, connection mode, structure form, sealing material, nominal pressure, valve body material, etc., mainly for the model description of the existing electric shut-off valve products, such as customized When the material and structure of the globe valve products change, please select according to the valve preparation method.
The method of preparing the model of the electric shut-off valve:
Additional code for stop valve: W: means bellows, D: means low temperature, B: means heat preservation;
1) Type code of globe valve: J: means globe valve;
2) Stop valve transmission mode: manual without code, 5: bevel gear, 6: pneumatic, 9: electric;
3) Connection mode of stop valve: 4: flange connection, 6: welding;
4) The structure of the globe valve: 1 straight-through type, 2 Z-type straight-through, 3 three-way, 4-angle type, 5 Y-type DC type, 6 balanced straight-through type, 7 balanced angle type, 8-pin type;
5) Seal material of globe valve: F: fluorine rubber, H: stainless steel, N: nylon plastic, Y: cemented carbide, M: Monel alloy, W: valve body directly processed;
6) The nominal pressure of the shut-off valve: 16: means that the pressure of 1.6mpa is 16 kilograms, PN1.6-32mpa, IN150LB-1500LB, 5-63K;
7) Globe valve body material: A: titanium alloy, C: carbon steel, I: chromium molybdenum steel, P: stainless steel 304, R: stainless steel 316;
Examples of electric shut-off valve model preparation:

electric globe valve

J941F46-16C Electric flange fluorine-lined globe valve
1. J: indicates the stop valve;
2. 9: indicates that the transmission mode is electric;
3. 4: The connection method is flange connection;
4. 1: The structure is a straight flow channel;
5. F: The sealing material is fluorine rubber;
6. 16: Indicates that the nominal pressure is 1.6MPa;
7. C: Indicates that the valve body material is carbon steel.

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

V-type regulating ball valve

July 1, 2021

Working principle of pneumatic V-type regulating ball valve
The ball core of the pneumatic V-shaped regulating ball valve is designed with a special V-shaped notch, which has a shearing effect on the valve seat. It is especially suitable for media containing fibers, small solid particles, slurry and other media. According to different structural methods, it can generally be divided into flange and Wafer type; Pneumatic V-type ball valve is a fixed ball valve and also a single-seat sealed ball valve. It has the best adjustment performance among ball valves and can achieve flow adjustment. At the same time, since the valve core and seat are rotated without gaps, they can be wiped by themselves. The fouling on the ball and valve seat keeps a good seal between the ball and the valve seat.

electric V type ball valve

Working principle of pneumatic V-shaped regulating ball valve:
Pneumatic V-shaped regulating ball valve realizes different degrees of proportionality according to the V-shaped angle of the V-shaped sphere. It is generally used in conjunction with a valve positioner to achieve proportional adjustment. The V-shaped spool is most suitable for various adjustment occasions and has a large rated flow coefficient. ,, The pressure loss is small, the use flow capacity is large, and it has accurate shut-off characteristics and control functions. The flow characteristics are approximately equal percentages. The opening and closing parts adopt the V-shaped ball structure, which completely solves the problem of easy deposition of medium in the valve cavity.
Features of pneumatic V-shaped regulating ball valve:
1. Pneumatic V-shaped ball valve V-shaped gap and valve seat produce a strong shear force to cut off impurities such as fibers, and has a self-cleaning function to avoid valve jamming.
2. The pneumatic V-type regulating ball valve has an inherent flow characteristic of approximately equal percentage and an adjustable ratio of up to 300:1, so it can provide precise control in a wide range of changes.

Note: Because the pneumatic V-type regulating ball valve is generally a single-seat sealed ball valve, it is not suitable for two-way use. Due to its streamlined shape and full right-angle rotation control, the maximum volume is extremely high, the flow capacity is particularly large, and the flow resistance is small.

pneumatic V type ball valve

Pneumatic V-type regulating ball valve principle dynamic diagram
The valve core of the pneumatic V-shaped regulating ball valve is designed as a V-shaped gap with a special switch. The V-shaped gap and the valve seat generate a strong shear force, which can cut off high-viscosity media containing fibers or small solid particles, and has a self-cleaning function , To avoid the phenomenon of valve jamming. Pneumatic V-shaped ball valve is suitable for regulation and control, with high stability. Even in the case of small flow or high-viscosity medium, it can also ensure the accuracy of control within the entire range; while O-shaped ball valve is suitable for cutting off, relatively It is economical.
There is a V-shaped opening on the sphere of the pneumatic V-shaped regulating ball valve. As the ball rotates, the opening area changes, but the shape of the opening surface is always triangular. The flow characteristics are approximately equal percentages, the adjustable ratio is large, and the pressure loss is small. The flow capacity is large, and it has accurate interception characteristics and control functions. The opening and closing parts adopt a V-shaped spherical structure, which completely solves the problem of easy deposition of medium in the valve cavity. It is suitable for fibrous and slurry fluids!
The angle of the V-shaped port of the pneumatic V-shaped ball valve can be customized to meet more precise shut-off characteristics and control functions. Generally, more V-shaped valves are used in slurry media. They are similar to cam flex valves and are much better than O-shaped valves. V-shaped ball valves are used as regulating valves. For example, if the medium is not clean, the flow coefficient is low, and the leakage level is high, etc. occasion.

Working principle of electric V-type regulating ball valve

V type ball valve drawing

The electric V-shaped regulating ball valve has a special-shaped V-shaped incision. When the valve is closed, the V-shaped incision and the valve seat form a wedge shape, which has a shearing effect. The electric V-shaped ball valve is suitable for the control of fibrous slurry, sewage and viscous particle media. It can prevent the seizure of dirt between the ball and the valve seat. It has a self-cleaning function and is a wide-ranging regulating valve.
When the electric V-shaped ball valve rotates, the V-shaped blade of the ball is tangent to the valve seat, thereby cutting off the fiber and solid matter in the fluid. However, the general ball valve does not have this function, so it is easy to cause the fiber impurities to get stuck when closed. , Bring great inconvenience to repair and maintenance. The valve core of the electric V-shaped ball valve will not be jammed by the fiber, and the flow rate of the pipeline medium is adjusted and controlled according to the change of the opening area of the V-shaped gap.
Note: Since the electric V-type regulating ball valve is generally a single-seat sealing ball valve, it is not suitable for two-way use. The integral valve body structure is adopted, and there is no potential for leakage.
Features of electric V-shaped ball valve:
1. It has the advantages of compact structure, small volume, vertical and horizontal installation, etc., adopts movable metal valve seat, self-compensation function, and has superior sealing performance and long service life.
2. The electric V-shaped ball valve adopts a double-bearing structure, which has high mechanical stability and low starting torque, which ensures that the valve has excellent sensitivity and induction speed.
3. Maximum reliability (safety): The valve body is a whole, sturdy and durable, operation is not affected by pipeline pressure, and leakage of the valve body can be avoided.
4. The V-shaped gap and valve seat of the electric V-shaped regulating ball valve produce a strong shearing force to cut off impurities such as fibers, and has a self-cleaning function to avoid valve jamming.
5. Maximum flow volume: Due to the streamlined shape of the electric V-shaped ball valve and the full right-angle rotation control, the maximum volume is particularly high, the flow capacity is particularly large, and the flow resistance is small.

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 globe valve model preparation method

July 1, 2021

Pneumatic globe valve /cut-off valve model preparation method
Pneumatic shut-off valve is used to open and close the pipeline medium by compressed air, and the action speed is relatively faster. Different materials and seals are selected, which can be applied to various pressure, temperature

and medium conditions, and the seal is reliable and the performance is excellent. However, since there are many types of pneumatic stop valves and their structural forms are changeable, users should be familiar with their model designation method when choosing pneumatic stop valves, so as to avoid problems such as selecting the wrong type, replacing goods and returning goods!
Pneumatic globe valve model preparation instructions are represented by the code of the globe valve type, drive mode, connection mode, structure form, sealing material, nominal pressure, valve body material, etc., mainly for the model description of the existing pneumatic globe valve products, such as customized When the material and structure of the globe valve products change, please select according to the valve preparation method.
Pneumatic shut-off valve model preparation method:
Additional code for stop valve: W means bellows, D means low temperature, B means heat preservation;
1) Type code of globe valve: J means globe valve;
2) Stop valve transmission mode: manual without code, 5 bevel gear, 6 pneumatic, 9 electric;
3) Connection mode of stop valve: 4 flange connection, 6 welding;
4) The structure of the globe valve: 1 straight-through type, 2 Z-type straight-through, 3 three-way, 4-angle type, 5 Y-type DC type, 6 balanced straight-through type, 7 balanced angle type, 8-pin type;
5) Seal material of globe valve: F fluorine rubber, H stainless steel, N nylon plastic, Y cemented carbide, M Monel alloy, W valve body directly processed;
6) The nominal pressure of the shut-off valve: 16 means that the pressure of 1.6mpa is 16 kilograms, PN1.6-32mpa, IN150LB-1500LB, 5-63K;
7) Globe valve body material: A titanium alloy, C carbon steel, I chromium molybdenum steel, P stainless steel 304, R stainless steel 316;
Examples for the compilation of pneumatic shut-off valve models:

pneumatic globe valve

WJ641H-16C Pneumatic Bellows Globe Valve
1. W: means bellows
2. J: represents the stop valve;
3. 6: indicates that the transmission mode is pneumatic;
4. 4: The connection method is flange connection;
5. 1: The structure is a straight flow channel;
6. H: Hard seal made of stainless steel for the sealing pair;
7. 16: Indicates that the nominal pressure is 1.6MPa;
8. C: Indicates that the valve body material is carbon steel.

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 ball valve model preparation method

June 30, 2021

Pneumatic ball valve model preparation method/code name establishment in China.
With the rapid development of my country’s industrial modernization, the use of valves is also increasing. Pneumatic ball valves have the advantages of fast opening and closing speed, and not only can switch and cut off, but also control flow, etc., and become the most widely used valve type. one! However, due to the wide variety of pneumatic ball valves, including the use of pressure, temperature and control methods, the corresponding ball valve models are also different. In order to avoid errors in the selection of the user, and to ensure that the pneumatic ball valve can be used normally, more instruments Self-Control Valve Company hereby provides instructions for the preparation of pneumatic ball valve models for everyone to understand and recognize!

Pneumatic electric high platform ball valve

Pneumatic ball valve model editing instructions are mainly from the increase of additional conditions of the pneumatic ball valve, the selection of the drive mode, the difference of the connection form, the change of the structure form, the type of sealing material, the level of valve pressure and the material of the valve body, etc. to facilitate the explanation, hope It is helpful to the majority of users.
Pneumatic ball valve model representation method:
Ball valve additional code: V means the valve core has a V-shaped structure, D means low temperature, B means heat preservation, P means eccentric structure, U, S and DY mostly mean top-mounted type;
Ball valve name code: Q means ball valve; Ball valve drive code: 2 means electro-hydraulic, 3 means turbine, 6 means pneumatic, 7 means hydraulic, 9 means electric, manual without code;
Code of connection method: 1 means internal thread, 4 means flange type, 6 means welding, 7 means wafer type;
Structural type code: Floating type: 1 means straight-through runner, 2 means Y-type tee, 4 means L-type tee, 5 means T-type tee; Fixed type: 0 means hemispherical through, 6 means four-way runner, 7 Means straight-through flow to, 8 means L-type tee, 9 means Y-type tee;
Sealing material code: B babbitt alloy, F fluorine rubber, F46 lining fluorine, H stainless steel, J rubber lining, M Monel alloy, N nylon plastic, Monel P, Y cemented carbide, W valve body directly processed;
Pressure rating code: 16 means the pressure is 16 kg (1.6Mpa) and the maximum can reach 64Mpa; 150LB means the American standard pound pressure, and the maximum pressure rating can reach 2500LB (150LB=1.6MPA/300LB=2.5-4.0mpa/400LB=6.4 mpa/600LB=10mpa); 5K means Japanese pressure, maximum pressure is 63K; Valve body material code: A titanium and titanium alloy, C carbon steel, I chromium molybdenum steel, P18-8 series stainless steel, RMo2Ti series stainless steel, S plastic.
Pneumatic ball valve model editing instructions:
Q645F-16P Stainless steel pneumatic flange three-way ball valve
1. Q: represents the ball valve;
2. 6: It means that the transmission mode is pneumatic;
3. 4: The connection method is flange connection;
4. 5: The structure is a floating T-type tee;
5. F: The sealing material is fluorine rubber;
6. 16: Indicates that the nominal pressure is 1.6MPa;
7. P: indicates that the valve body is made of stainless steel.

More details for valve model establishment, you can visit another article: https://www.tanghaivalve.com/valve-model-establishment-and-meaning/

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 of electric gate valve

June 30, 2021

Principle of electric gate valve, Working principle of electric gate valve
Principle of electric gate valve:
Electric gate valve, as the name suggests, is to control the gate valve with an electric actuator, which is mainly

electric stainless steel gate valve

divided into an upper part and a lower part. The upper part is an electric actuator, and the lower part is a gate valve. Connect the actuator and the gate valve, and the electric actuator controls the opening and closing of the gate valve to work to achieve the on-off of the pipeline medium. Gate valves are generally suitable for on-off occasions and are normally open and normally closed valves. If you need to adjust the working conditions, generally choose electric control valve, electric ball valve, electric butterfly valve, electric shut-off valve, etc.
Working principle of electric gate valve:
The electric gate valve is powered by electric energy to turn on the electric actuator to drive the valve, and the valve stem is connected to drive the valve plate to move up and down or open and close, so that the valve can control the switch of the pipeline medium. It can be remotely controlled when it is added into the control box and other accessories, which is convenient and trouble-free.
Classification of electric gate valve actuators:
There are two common types of rotary electric actuators and linear electric actuators. Angular-stroke electric actuator: the angular-stroke electric actuator is used in conjunction with the angular-stroke valve to realize the internal rotation of the valve within 90 degrees to control the flow of the pipeline.
Straight-stroke electric actuator: a straight-stroke electric actuator is used in conjunction with a straight-stroke valve to realize the up and down movement of the valve plate to control the on-off of the pipeline fluid. It is usually used in conjunction with equipment with a higher degree of automation.

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

Three-way ball valve T type vs L type

June 29, 2021

The difference between pneumatic three-way ball valve T type and L type
Pneumatic three-way ball valve is a new type of valve that has been widely used in recent years. It is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. According to the different internal structure, it can be divided into L type and T type, but From the appearance, there is no difference between the two! So what is the difference between the principles and applicable working conditions of the T-type and L-type pneumatic three-way ball valves? How to choose?

pneumatic-electric-three way ball valve-flange-crew-T-L-type

Pneumatic flanged three-way ball valve Pneumatic internal threaded three-way ball valve The common connection method of pneumatic three-way ball valve is flange or internal thread. Choose according to the actual working conditions of the pipeline! Then in the process of use, you should choose different structural forms according to different working conditions. From the technological point of view, the T-type ball valve can replace the L-type ball valve. The working principle diagrams of the two are as follows:
The L-type pneumatic three-way ball valve is used to switch the flow direction of the medium, which can connect two perpendicular channels (such as the L-type flow diagram). The T-type pneumatic three-way ball valve can not only switch the flow direction of the medium, but also make the three channels communicate with each other. At the same time, it can also close any channel to connect the other two channels to flexibly control the merging or splitting of the media in the pipeline.

Flow diagram-three way ball valve-T-type-L-type

The difference between T-type electric three-way ball valve and L-type electric three-way ball valve
Electric three-way ball valve is a new type of three-way port switching ball valve, which can be used to control the direction, split or merge of the three pipeline media. According to the different ball core structure, it can be divided into T-type or L-type, T-type electric The difference between the three-way ball valve and the L-type electric three-way ball valve is mainly the difference in the internal structure, and there is no difference in appearance! The T-shaped ball valve can connect three orthogonal pipelines with each other and cut off the third channel to split and merge, while the L-shaped ball valve can only connect two orthogonal pipelines, and cannot maintain the third pipeline at the same time. Connectivity only plays a role of distribution.
As can be seen from the above figure, the T-type ball valve is mainly used for the diversion or mixing of media, and the L-type ball valve is mainly used for reversing! L-type three-way ball valve is used for distribution and switching that do not require 3-way, and the operation is more convenient. There are only two valve positions, and there are positioning, and it can be turned 90 degrees without error; T-type three-way ball valve has a wide range of channels to choose from , There are many valve positions, generally there is no positioning, if you replace the L-type, it should be turned 180 degrees.
Electric flanged three-way ball valve Electric internal threaded three-way ball valve From the technological point of view, the T-type electric three-way ball valve can replace the L-type electric three-way ball valve, but the L-type ball valve cannot replace the T-type ball valve! In the process of use, different structures should be selected according to different working conditions, and the T-type ball valve can flow through but the L-type ball valve cannot.

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

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