Our goal: to be a high-quality manufacturer of industrial control valves, gaining unanimous recognition from new and old customers
Our mission: To fully utilize the effectiveness of industrial control valves to achieve better results
Pressure limit
The allowable high operating pressure of the ball valve at high and low operating temperatures is shown.
The operating temperature of valve seats and seals made of PTFE or RTFE, and other types of valve seats and seals, should be subject to inspection by the KI factory.
The nominal pressure rating (PN) of the valve can indicate the high working pressure of the valve under normal temperature conditions. (For example, PN4.0 indicates a large working pressure of 40 Bar (4.0 MPa) when the operating temperature is between - 190C and 380C).
For precautions for electric or pneumatic actuators, refer to their corresponding instructions.
Troubleshooting
Ball valves have been subject to material erosion for a long time, resulting in friction, causing severe impact wear, which cannot meet normal production requirements, and also resulting in a shortened service life of the equipment. Currently, wear-resistant materials, such as ceramic materials, polymer composites, and other methods are commonly used for ball valve wear, and technical systems are widely used.
Polymer materials have excellent adhesive properties and ultra-strong wear resistance, which safely solves the drawbacks of frequent metal wear and ensure the normal production of enterprise equipment. Moreover, the unique ceramic material and special surface strengthening agent in the material make it superior to any steel or even better than ceramic tiles in terms of wear resistance and physical impact resistance in harsh dry grinding environments. The incompatibility between the product and coal is an ideal material for preventing coal accumulation.
Installation and use
1. Indoor devices or outdoor applications with protective methods;
2. Outdoor outdoor devices, with wind, sand, rain, sunlight, and other erosion;
3. Have a flammable, explosive gas or dust environment;
4. Environment in humid and dry tropical regions;
5. The temperature of the pipeline medium is as high as 450 ℃ or above;
6. The ambient temperature is below - 20 ℃;
7. Vulnerable to flooding or immersion;
8. Environments with radioactive substances (nuclear power plants and radioactive substance test devices);
9. Environment on ships or docks (with salt fog, mold, and humidity);
10. Places with severe vibration; Places prone to fire;
For electric ball valves in the above environment, their electric device structure, materials, and protection methods are different. Therefore, the corresponding valve electric device should be selected based on the above obligation environment. According to engineering control requirements, the control function of electric ball valves is accomplished by electric devices. The purpose of applying electric ball valves is to achieve non manual electrical or computer control of the opening, closing, and regulating linkage of valves. The application of electric devices is no longer just about saving labor. Due to the significant differences in the function and quality of products from different manufacturers, the selection of electric devices and the selection of valves are equally important to the project.
Due to the ever-increasing requirements for industrial automation, on the one hand, the application of electric valves is increasing, and on the other hand, the control requirements for electric valves are becoming increasingly high and complex. Therefore, the design of electric valves in terms of electrical control is always updated. With the increasing requirements for use and the widespread application of computers, new and diverse electrical control methods will always appear. Regarding the overall control of electric valves, attention should be paid to selecting the control method of electric valves.
For example, depending on the needs of the project, whether to apply centralized control or single control, whether to interact with other equipment, sequence control, or computer sequence control, the control principles are different. The valve electric device manufacturer's sample only provides standard electrical control principles, so the application department should conduct technical disclosure with the electric device consumer factory to clarify the technical requirements.
Hard seal installation
1) Remove the protective covers on both sides of the flange end, and flush and clean with the valve fully open.
2) Before installation, the complete machine should be tested according to the specified signal (electrical or pneumatic) (to prevent vibration caused by transportation from affecting the performance), and can only be installed online after passing the test (wiring according to the wiring diagram of the electric actuator).
3) Before preparing to connect to the pipeline, it is necessary to flush and remove residual impurities in the pipeline (these substances may damage the valve seat and ball).
4) During installation, please do not use the actuator part of the valve as a lifting point for lifting to avoid damage to the actuator and accessories.
5) This type of valve should be installed in the horizontal or vertical direction of the pipeline.
6) The pipeline near the installation point must not be sagging or bear external forces. Pipe supports or supports can be used to eliminate the deviation of the pipeline.
7) After connecting to the pipeline, please cross lock the flange connecting bolts with the specified torque.
Applicable occasions
Because ball valves typically use rubber, nylon, and polytetrafluoroethylene as seat sealing ring materials, their use temperature is limited by the seat sealing ring material. The cut-off function of ball valves is achieved by pressing metal balls against plastic valve seats under the action of media (floating ball ball valves). Under a certain contact pressure, the valve seat sealing ring undergoes elastic-plastic deformation in local areas. This deformation can compensate for the manufacturing accuracy and surface roughness of the ball, ensuring the sealing performance of the ball valve.
Due to the fact that the valve seat sealing ring of a ball valve is usually made of plastic, it is important to consider the fire resistance and fireproofing of the ball valve when selecting its structure and performance. Especially in petroleum, chemical, metallurgical, and other departments, when using ball valves in equipment and pipeline systems with flammable and explosive media, attention should be paid to fire resistance and fireproofing.
Generally, it is recommended to use ball valves in pipeline systems with two-position regulation, strict sealing performance, mud, wear, necking channels, rapid opening and closing action (1/4 turn opening and closing), high pressure cutoff (large pressure difference), low noise, cavitation and gasification, small leakage to the atmosphere, small operating torque, and low fluid resistance.
Ball valves are also suitable for lightweight structures, low pressure cutoff (low pressure differential), and corrosive media in pipeline systems. Ball valves can also be used in cryogenic (cryogenic) devices and piping systems. In the oxygen pipeline system of the metallurgical industry, it is necessary to use ball valves that have undergone strict degreasing treatment. When the main pipeline in oil and gas pipelines needs to be buried underground, it is necessary to use a full bore welded ball valve. When regulating performance is required, ball valves with special structures with V-shaped openings need to be selected. In petroleum, petrochemical, chemical, electric power, and urban construction, metal to metal sealed ball valves can be selected for pipeline systems with operating temperatures above 200 degrees Celsius.
Operational Use
1) Before operation, make sure that the pipelines and valves have been flushed.
2) The operation of the valve drives the valve rod to rotate according to the input signal size of the actuator: when the valve rotates 1/4 turn (90 °) in the forward direction, the valve is turned off. The valve opens when rotated in reverse direction by 1/4 turn (90 °).
3) When the actuator direction indicator arrow is parallel to the pipeline, the valve is in the open state; When the arrow is perpendicular to the pipeline, the valve is closed.
