1. Leakage at the packing of butterfly valve Faults: (1) The filler has exceeded its usage period and has aged. (2) Excessive force during operation. (3) The live bolt is not tightened. Solutions: (1) Aging or damaged fillers should be replaced in a timely manner. (2) It should be operated uniformly with normal force, and no casing or other methods should be added. (3) Evenly tighten the bolts that hold down the packing. 2. Leakage at sealing surface of butterfly valve Faults: (1) The installation direction of the valve does not match the flow direction of the medium. (2) The butterfly valve does not close properly. (3) The butterfly valve that has been closed for a long time has accumulated scale on the sealing surface. (4) The sealing surface is severely damaged. Solutions: (1) Pay attention to installation inspection and ensure that it is tightly closed in place. (2) Open a gap in the valve and allow the high-speed fluid to flush away any dirt on the seal. (3) Re grind and thicken the adjusting gasket for compensation. 3. Leakage at the flange connection of butterfly valve Faults: (1) Uneven tightening force of bolts. (2) Aging and damage of gaskets. (3) The material used for the gasket does not meet the requirements of the working medium. Solutions: (1) Tighten the bolts evenly again. (2) Replace the gasket in a timely manner. (3) Select gasket materials and forms correctly according to the requirements of the working conditions. 4. Damaged at handle and handwheel of butterfly valve Faults: (1) Incorrect use. (2) Loose fasteners. (3) Damage to the connection between the handle, handwheel, and valve stem. Solutions: (1) Prohibit the use of pipe pliers, long levers, impact tools, etc. (2) Repair and repair at any time. 5. Jamming at worm gear drive of butterfly valve Faults: (1) Unclean embedded dirt, affecting lubrication. (2) Poor operation. Solutions: (1) Please keep it clean and refuel regularly. (2) If a bite is found during operation and there is significant resistance, the operation cannot continue, otherwise the damage will worsen. 6. Electric installation fault of butterfly valve Faults: (1) Poor lubrication, foreign objects stuck inside the valve causing excessive torque. (2) Motor malfunction. Solutions: (1) Oil should be added and kept clean to ensure that the oil pipe is in good condition, the packing is moderately compressed, and foreign objects are promptly removed. (2) The working time of the motor should not exceed 15 minutes, and the power supply should be normal. It should be avoided to touch and get damp.

With the continuous development of global industrialization, the safety requirements for equipment and pipeline systems are also increasing. Line blind valves have always played a crucial role in the safety and reliability of industrial facilities. Line blind valve has been widely used in various fields such as petrochemical, energy production, and chemical engineering. It provides more flexibility and safety for engineers and operators in various industries, helping to reduce maintenance costs and improve production efficiency. Adaptable Design In addition to its conventional design, the THD-Slide is available in variations tailored for High-Temperature, Fire Safety, and Non-Drip applications. For installations constrained by limited space, a compact version can be provided as well. Easy Seal Inspection In this design, the seals are housed within the spectacle plate. This characteristic offers the advantage of convenient access for inspection and seal replacement. Assessing the condition of these seals can be performed external to the operational process, prior to any position changes, thereby ensuring the integrity of the seal's quality. Cost Effectiveness The THD-Slide features a straightforward and robust design engineered to deliver complete shutdown, extended operational lifespan, and cost-effective service with minimal maintenance requirements. The distinctive mechanism for opening and closing the THD-Slide enables a single individual to rapidly and safely blind pipelines without the need for any tools or equipment. Mechanism Principle In normal conditions, the blind valve's diversion hole is in contact with the pipeline, and the blind valve is in the open position. When maintenance is required, and the pipeline must be cut off, then loosen the stem of blind valve to move the flat end onto the pipeline, and make the blind valve turn to closed position from open position; tighten the stem and let the blind valve to perform sealing function and cut off the pipeline. When the maintenance work is completed, loosen the stem and move the blind plate to the diversion hole and connected to the pipeline. The blind valve was turned to closed position from open one. Lock the stem, and seal it, the pipeline is now open, and the blind plate valve returns to the open position.

Three-way ball valves are mainly used in pipelines to cut off, distribute, and change the flow direction of the medium. Three-way ball valve is a relatively new type of ball valve, which has some unique advantages of its own structure, such as no friction on the switch, less wear on the seal, and small opening and closing torque. This can reduce the specifications of the equipped actuator. Three-way ball valves are available in T and L shapes. The T-shape can connect three orthogonal pipelines and cut off the third channel, playing a role of diversion and confluence. The L-type three-way ball valve type can only connect two orthogonal pipelines and cannot maintain the interconnection of the third pipeline at the same time, only serving as a distribution function. The working principle of a three-way ball valve is to rotate the valve core to make the valve unobstructed or blocked. Ball valves have the advantages of lightweight opening and closing, reliable sealing, simple structure, and convenient maintenance. Its small size allows it to be made into a large caliber. The sealing surface and spherical surface of ball valves are often in a closed state and are not easily eroded by media, making them widely used in various industries. 1. The three-way ball valve is easy to switch on the pipeline and has stable and reliable performance. 2. The three-way ball valve has a long service life, high flow capacity, and low resistance. 3. The selection of three-way ball valves should be based on the diversion requirements of the pipeline and should not be confused with each other.

The proper installation of the drain valve has a direct impact on the normal operation of the drain valve and the production efficiency of the equipment. The installation of the drain valve must follow the installation requirements of the drain valve in order to achieve better work efficiency for the drain valve and equipment. 1. Before installing the drain valve, it is necessary to use pressurized steam to purge the pipeline and remove any debris. 2. Before the drain valve, a filter should be installed to ensure that the drain valve is not blocked by pipeline debris, and the filter should be cleaned regularly. 3. Valves should be installed before and after the drain valve to facilitate its maintenance at any time. 4. The direction of condensate flow should be consistent with the arrow mark on the installation of the drain valve. 5. The drain valve should be installed at the lowest point of the equipment outlet to timely discharge condensate and avoid steam resistance in the pipeline. 6. If there is no drain valve installed at the lowest position of the equipment, a backflow bend (condensate lifting joint) should be added at the lowest position of the water outlet to raise the condensate level before installing a drain valve to avoid steam resistance. 7. The outlet pipe of the drain valve should not be immersed in water (if immersed in water, a hole should be drilled at the bend to break the vacuum and prevent sand from being sucked back). 8. Mechanical traps should be installed horizontally, while steam traps should not be installed in series. 9. Each device should be equipped with its own drain valve. 10. Thermostatic type steam traps need to have over one meter of non-insulated supercooled pipes in front of them, while other types of steam traps should be located as close to the equipment as possible. 11. When using a drain valve for drum drying (with siphon type) equipment, please indicate: use a drain valve with an anti-steam resistance device to avoid steam lock on the equipment. 12. If there is condensate recovery after the drain valve, the outlet pipe of the drain valve should be connected to the main pipe from above the recovery main pipe to reduce back pressure and prevent backflow. 13. If there is condensate recovery after the drain valve, pipelines with different pressure levels should be separated for recovery. 14. The condensate recovery main pipe behind the drain valve cannot climb a slope, which will increase the back pressure of the drain valve. 15. A check valve should be installed before the condensate enters the recycling main after the drain valve to prevent the condensate from flowing back. 16. Install a drain valve on the steam pipeline, with a condensate collection well located near the radius of the main pipeline, and then use a small pipe to lead it to the drain valve. 17. If the mechanical drain valve is not used for a long time, it is necessary to remove the drain screw and drain the water inside to prevent freezing. 1...

There are many types of valves and their range of use is also wide. If used improperly, there may be "running, emitting, dripping, and leaking" phenomena, with mild cases affecting production and severe cases causing accidents. So understanding and correctly using valves is a very important issue. There are many types of valves used in heating systems. For example, gate valves, globe valves, ball valves, butterfly valves, check valves, safety valves, regulating valves, balance valves, self-operated balance valves, and so on. 1. Gate valve, is a widely used type of valve. The sealing surface of the gate and the valve seat are highly smooth, flat, and consistent, and processed into a very close fitting and tight sealing pair. The gate plate conducts and shuts off the medium through the upward and downward pressure of the valve stem. It plays a shut-off role in the pipeline. 2. Globe valves are also widely used valves. Its working principle is similar to that of a gate valve, except that the closing part (valve disc) moves along the centerline of the valve seat. It plays a shut-off role in the pipeline and can also roughly adjust the flow rate. 3. Compared to gate and globe valves, ball valves are a new type of valve that is gradually being widely adopted. The valve core is a ball with a through cavity, which is controlled by the valve stem to rotate 90 ° to make the valve unobstructed or blocked. It plays a shut-off role in the pipeline. 4. Butterfly valves are currently the most widely used and diverse valve in heating systems. The valve disc is a disc that rotates through the valve stem and rotates at 90 ℃ within the valve seat range to achieve valve opening and closing. It plays a shut-off role in the pipeline. It can also adjust the flow rate. 5. Check valves are also known as single flow valves. It is a commonly used auxiliary valve. It is a valve that automatically opens and closes based on the force of the fluid itself and the weight of the valve disc. As the name suggests, its function is to prevent media backflow. Usually installed at the outlet of the water pump to prevent damage caused by water hammer. 6. The regulating valve is also called a control valve. It is a commonly used valve in the secondary network of heating systems. Its appearance and structure are similar to that of a shut-off valve, but the sealing pair is different. The valve disc and seat of the regulating valve are similar to the cork and mouth of a warm water bottle, and the flow rate is adjusted by changing the flow area through the movement of the valve disc. There is a ruler on the valve shaft indicating the corresponding flow rate. 7. Improved balance valve control valve. The flow channel adopts a direct current type, and the valve seat is changed to polytetrafluoroethylene. It overcomes the disadvantage of large flow resistance, makes the sealing more reasonable, and also has a cut-off function. 8. Self operated balance valve, also known as flow control valve. The...

The Numerical Control Multi-Pass Valve plays a crucial role in automating well selection and metering within oilfield metering stations. It replaces multiple metering pipe manifolds and electrically actuated three-way valve assemblies, streamlining well selection. Operated through control system automation or manual actuation, it enables automatic well switching, offering benefits like a compact footprint, streamlined operation, unmanned capability, and simplified installation. It can also be customized for specific needs, making it ideal for modernizing aging oil and gas metering stations on offshore platforms, artificial islands, and remote onshore areas. Features 1. Media Versatility: The valve handles various mediums, including light crude, heavy crude, oil-contaminated water, and clear water. 2. Simplified Operation: Streamlined control through a single multi-pass valve eliminates complex adjustments. 3. Cost-Effective: Fewer control units lead to investment savings of 20% to 30% compared to conventional systems. 4. High Sealing Performance: Self-compensating sealing and snug integration ensure zero leakage, supported by manual adjustments for maintenance. 5. Precision Engineering: Advanced positioning technologies enable near error-free well selection. 6. Durability and Efficiency: The hard-faced alloy sealing surface resists erosion, scaling, and extends service life. 7. Optimal Pressure Management: The system maintains a maximum pressure loss below 0.025 MPa.