Electric stainless steel globe valve

J941WElectric stainless steel globe valveProduct Description

Electric stainless steel globe valveDuring installation, the medium can enter from below or above the valve core in two ways. The advantage of the medium entering from below the valve core is that when the valve is closed, the packing is not under pressure, which can extend the service life of the packing and allow for replacement of the packing when the pipeline in front of the valve is under pressure. The disadvantage of medium entering from below the valve core is that the driving torque of the valve is relatively large, about 1.05-1.08 times that of entering from above, and the axial force on the valve stem is large, making the valve stem prone to bending. For this reason, the method of medium entering from below is generally only suitable for small caliber manual shut-off valves, with a limit of no more than 350kg of force exerted by the medium on the valve core when the valve is closed. Electric globe valves generally use the method of medium entering from above. The disadvantage of entering the medium from above is exactly the opposite of entering from below.

The sealing surface of a globe valve must be forcibly closed to achieve sealing. Under the same diameter, working pressure, and driving device, the driving torque of a globe valve is 2.5 to 3.5 times that of a gate valve. This should be taken into account when adjusting the torque control mechanism of electric valves.

Electric stainless steel globe valveThe sealing surface of the valve is only in contact with each other when it is closed, and the relative slip between the forcibly closed valve core and the sealing surface is very small, so the wear of the sealing surface is also very small. The wear of the sealing surface of the globe valve is mostly caused by impurities in front of the valve core and sealing surface, or by the lack of tightness in the closed state, resulting in high-speed flushing of the medium.

Compared with gate valves, globe valves have the advantages of simple structure, good sealing performance, and easy manufacturing and maintenance; The disadvantage is that the liquid resistance is high, and the opening and closing force is large. The opening and closing component is a plug shaped valve disc with a flat or conical sealing surface, and the valve disc moves in a straight line along the centerline of the fluid. The movement form of the valve stem includes a lifting rod type (the valve stem is lifted and lowered without the handwheel lifting), as well as a lifting rotating rod type (the handwheel rotates and lifts together with the valve stem, and the nut is set on the valve body). Globe valves are only suitable for fully open and fully closed, and are not allowed to be adjusted or throttled.

The opening and closing component is a plug shaped valve disc, with a flat or conical surface on the sealing surface. The valve disc moves in a straight line along the centerline of the valve seat. The movement form of valve stem, commonly known as concealed stem, can also be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media through lifting and rotating stem. Therefore, this type of shut-off valve is very suitable for use as a cut-off, regulating, and throttling valve. Due to the relatively short opening or closing stroke of the valve stem and its highly reliable shut-off function, as well as the proportional relationship between the change in the valve seat opening and the stroke of the valve disc, this type of valve is very suitable for regulating flow.

A globe valve refers to a valve in which the closing element (valve disc) moves along the centerline of the valve seat. According to the movement of the valve disc, the change in the valve seat opening is directly proportional to the stroke of the valve disc. Due to the relatively short opening or closing stroke of the valve stem and its highly reliable shut-off function, as well as the proportional relationship between the change in the valve seat opening and the stroke of the valve disc, this type of valve is very suitable for regulating flow. Therefore, this type of valve is very suitable for use as a cut-off, regulating, and throttling device. Its derivative products can include large-diameter ball valves, gate valves, and air dampers. All adopt the standard "95" design of the Ministry of Electric Power, with 2 pairs of passive dry contacts to meet more needs. The protection level is IP65 (up to 67), and the torque range is 50-10000N * M. The device is fully functional, reliable in performance, has a control system, and is easy to use and maintain. Widely used in power, metallurgy, petroleum, chemical, papermaking, coal, water supply and drainage, etc.

2、 Connection steps between electric actuator and valve:

1. Manually rotate the valve with the handwheel to ensure there are no abnormal conditions such as jamming, and turn it to the fully closed position:

2. Fix the bracket onto the valve:

3. Place the valve electric device, electric actuator, electric actuator, and actuator on the bracket and gently tighten them with bolts and nuts:

4. Turn the valve electric actuator to the closed position and secure the valve core shaft and electric actuator output shaft with couplings and screws:

5. Tighten the screws between the electric actuator and the bracket:

6. Rotate the electric actuator with the handle to confirm that there is no eccentricity, bending, and smooth movement, and be careful not to exceed the stroke!

3、 Safety inspection of electric actuator:

1. Before connecting the power supply to the electric actuator, please confirm that the power supply voltage is consistent with the power supply voltage indicated on the nameplate of the electric actuator.

2. The pipeline of the electric actuator must be cleaned and blown clean. If there are impurities in the medium, a filter valve should be installed on the pipeline in front of the valve:

3. The power cord of the electric actuator should have sufficient capacity to meet the requirements of the rated current and starting current of the electric actuator. Otherwise, it may cause the wire to burn out and cause accidents.

4. During installation, the space required for maintenance and disassembly of each component should be ensured

5. Check whether the model and parameters of the electric actuator meet the on-site installation requirements and technical requirements:

6. During installation, disassembly, and debugging, the sealing surface, sealing components, and explosion-proof surface of explosion-proof electrical equipment should not be damaged, and anti rust oil should be applied to the explosion-proof surface. The electrical cover should be tightly fastened to prevent rainwater or moisture from entering;

7. When the electric actuator is not frequently used, it should be regularly inspected, maintained, and operated.

Structural features:

1. It can be installed at any position in the pipeline, with the medium flowing from bottom to top.

2. Stainless steel electric globe valve is suitable for pipelines with various corrosive media, with good corrosion resistance and sufficient strength.

3. Alloy steel globe valves are suitable for high temperature steam and oil pipelines and have high temperature resistance characteristics

Electric stainless steel globe valveApplication:

Gate valves and stainless steel globe valves are fully open and fully closed valves, used for cutting off or connecting media, and should not be used as regulating valves. The application scope of globe valves and gate valves is determined by their characteristics. In smaller channels, when good shut-off sealing is required, globe valves are often used; In steam pipelines and large-diameter water supply pipelines, gate valves are generally used due to the requirement of low fluid resistance.

A check valve is a type of valve used to prevent the backflow of medium in a pipeline. When the medium flows back, the valve disc can automatically close, cutting off the flow of the medium and avoiding accidents. The structure of check valves is divided into lift and swing types according to the law of valve disc movement. Vertical lift check valves should be installed on vertical pipelines; Horizontal lift check valves should be installed on horizontal pipelines. When installing a rotary check valve, attention should be paid to ensuring that the direction of the medium flow is consistent with the arrow direction shown on the valve body, and cannot be installed in reverse.

J941WElectric stainless steel globe valveMain component materials

performance specifications

Main external dimensions and connection dimensions

Installation guide for globe valve:

(1) Compare the rated parameters required by the equipment with the rated parameters indicated on the product to ensure that the product meets the usage requirements;

(2) The installation personnel must be trained and experienced to ensure the smooth completion of the installation work;

(3) After installation, it is necessary to conduct a ground check to ensure that the installation is correct;

(4) To ensure that there are no accidents during installation, the pipeline system needs to be thoroughly cleaned (using chemical reagents if necessary) before product installation to ensure its cleanliness, absence of rust and dirt. Before flushing, all filtering devices need to be removed to ensure smooth pipeline flow;

(5) It is recommended to install temporary pipelines at the equipment installation pipeline during the initial cleaning of the system, and then install the equipment onto the pipeline after the flushing work is completed;

(6) Use standard threaded joints for connection;

(7) During installation, please note that the flow direction of the medium is "low in, high out";

Ordering Notice:

1、 ① Product name and model ② Caliber ③ Is there any accessory for us to correctly select for you ④ Operating pressure ⑤ Temperature of the medium used.

2、 If the company's model has already been selected by the design unit, please order directly from our sales department according to the model.

3、 When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our valve company experts will review and control them for you. If you have any questions: Please: We will do our best to provide you with high-quality service. We provide comprehensive and professional "valve system solutions" and are also willing to help users solve problems encountered in production.