The Heating Jacket Gate Valve is widely used in industries such as petrochemical, chemical, and pharmaceutical. Its primary function is to maintain the temperature of the valve and its internal fluid by circulating a heating medium within the jacket, preventing the fluid from solidifying or freezing due to temperature drop.

1. Advantages of the Heating Jacket Gate Valve

(1) Maintaining Fluid Temperature

The heating jacket gate valve maintains the temperature of the valve body and internal fluid through the heating medium circulating within the jacket (such as steam, hot oil, etc.), preventing the medium from solidifying or freezing due to temperature drop. This is particularly important for high-viscosity, crystallizable, or solidifying media.

(2) Preventing Pipeline Blockage

In low-temperature environments, certain fluids are prone to crystallizing or solidifying within the pipeline and valve, leading to blockages. The heating jacket gate valve effectively prevents this issue by heating the jacket, ensuring smooth operation of the pipeline system.

(3) Enhancing Process Efficiency

By maintaining the fluid's flowability, the heating jacket gate valve can significantly improve process efficiency, reducing downtime and production losses. This is especially beneficial in continuous production processes, offering notable economic advantages.

(4) Extending Equipment Lifespan

The design of the heating jacket gate valve reduces equipment wear and maintenance frequency caused by low temperatures, thereby extending the lifespan of the valve and associated equipment. This also helps lower maintenance costs.

(5) Wide Range of Applications

Heating jacket gate valves are suitable for various industries, including petrochemical, pharmaceutical, and food processing. They are capable of meeting the demands of various complex operating conditions and offer strong adaptability.

2. Limitations of the Heating Jacket Gate Valve

(1) Higher Costs

Due to the complex structure of heating jacket gate valves, their manufacturing costs are relatively high. Additionally, the need for heating media and related equipment results in higher initial investment and operating costs compared to standard valves.

(2) Strict Installation Requirements

The installation of heating jacket gate valves requires careful consideration of the heating medium's piping connections and insulation measures. The process is relatively complex and demands higher technical skills from the installation personnel.

(3) Complex Maintenance

Maintaining a heating jacket gate valve involves not only the upkeep of the valve itself but also the care of the heating jacket and the heating medium. This adds complexity to maintenance tasks and requires specialized technical support.

(4) Higher Energy Consumption

A heating jacket gate valve requires a continuous supply of heating medium, resulting in higher energy consumption. In situations where energy costs are high, using a heating jacket gate valve may increase operating expenses.

(5) Application Limitations

Although heating jacket gate valves are suitable for various industries, their primary application is in processes that require maintaining the temperature of fluids. In situations where heating or insulation is not needed, using a heating jacket gate valve may not be cost-effective.

Valves are the most common equipment in chemical enterprises. Installing valves may seem easy, but if not carried out according to relevant technical standards, it can lead to safety accidents. Today, we would like to share some experience and knowledge about valve installation with you.

I. Conduct a water pressure test during winter construction at negative temperatures.

• Consequence: Due to the rapid freezing inside the pipe during the hydrostatic test, the pipe is damaged by freezing.
• Measures: Try to conduct a water pressure test before winter construction, and blow out the water after the test, especially the water inside the valve must be completely removed, otherwise the valve may rust or even freeze and crack. When conducting a water pressure test in winter, the project must be carried out at a positive temperature indoors, and the water must be blown out after the test.

II. The pipeline system is not washed carefully before completion, and the flow and speed cannot meet the requirements of pipeline flushing.

• Consequences: Water quality cannot meet the operational requirements of the pipeline system, often resulting in reduced pipeline cross-sections or blockages.
• Measures: flushing should be carried out with the maximum design flow rate in the system or a water flow rate of not less than 3m/s. It should be considered as qualified if the water color and transparency at the outlet are visually consistent with those at the inlet.

III. Sewage, rainwater, and condenser pipes are concealed without undergoing a closed water test.

• Consequences: It may cause water leakage and cause losses to users.
• Measures: The closed water test work should be strictly inspected and accepted according to the specifications. The concealed installation of sewage, rainwater, condenser pipes, etc. in underground burial, ceiling, and between pipes should ensure no leakage.

IV During the hydraulic pressure strength test and tightness test of the pipeline system, the leakage inspection is not sufficient.

• Consequence: Leakage occurs after the pipeline system is running, affecting normal use.
• Measures: When testing the pipeline system according to design requirements and construction specifications, in addition to recording pressure values or water level changes within the specified time, it is particularly important to carefully check for leakage problems.

V. The flange plate of the butterfly valve is made of ordinary valve flange plate.

• Consequences: The dimensions of the flange plates for butterfly valves and ordinary valves are different. Some flanges have a small inner diameter, while the butterfly valve's disc is large, causing it to be unable to open or to open forcibly, resulting in damage to the valve.
• Measures: The flange plate should be processed according to the actual size of the butterfly valve flange.

VI. The valve installation method is incorrect.

For example, the water (steam) flow direction of the stop valve or check valve is opposite to the mark, the valve stem is installed downward, the horizontally installed check valve is installed vertically, the handle of the open-stem gate valve or butterfly valve has no space for opening and closing, and the valve stem of the concealed valve does not face the inspection door.

• Consequences: Valve malfunction, difficulty in switch maintenance, and often water leakage caused by the valve stem pointing downwards.
• Measures: Install the valve strictly according to the installation instructions. For the rising stem gate valve, leave enough space for the valve stem to extend and open. For the butterfly valve, fully consider the space for rotating the handle. The valve stem should not be lower than the horizontal position, and it should not be downward. For concealed valves, not only should there be an inspection door that meets the needs of opening and closing the valve, but also the valve stem should face the inspection door.

VII. The specifications and models of the installed valves do not meet the design requirements.

For example, the nominal pressure of the valve is less than the system test pressure; gate valves are used for water supply branch pipes with diameters less than or equal to 50mm; stop valves are used for hot water heating dry and vertical pipes; and butterfly valves are used for fire pump suction pipes.

• Consequences: It affects the normal opening and closing of the valve and the adjustment of resistance and pressure. It may even cause damage to the valve during system operation and necessitate repairs.
• Measures: Familiarize yourself with the application scope of various valves, and select the specifications and models of valves according to the design requirements. The nominal pressure of the valve should meet the requirements of the system test pressure. According to the construction specifications, when the diameter of the water supply branch pipe is less than or equal to 50mm, a globe valve should be used; when the diameter is greater than 50mm, a gate valve should be used. The hot water heating dry and riser pipes should use gate valves, and the suction pipe of the fire pump should not use butterfly valves.

VIII. The necessary quality inspection is not conducted according to the regulations before the installation of the valve.

• Consequences: The valve switch is not flexible during system operation, resulting in poor closure and leakage (steam) phenomena, causing rework and repair, and even affecting normal water (steam) supply.
• Measures: Before the installation of valves, pressure strength and tightness tests should be conducted. The tests should be conducted on 10% of each batch (of the same brand, same specification, and same model) and no less than one. For closed-circuit valves installed on the main pipe to cut off, strength and tightness tests should be conducted one by one. The pressure for valve strength and tightness tests should comply with the provisions of the Code for Acceptance of Construction Quality of Water Supply Drainage and Heating Works (GB 50242-2002).

IX. Improper installation of valves in high temperature environment.

• Consequence: leakage accident
• Measures: For high temperature valves over 200℃, they are at normal temperature during installation, but after normal use, the temperature rises, the bolts expand due to heating, and the gap increases, so they must be tightened again, which is called "hot tightening". Operators should pay attention to this work, otherwise leakage is likely to occur.

X. Valve flip-chip

• Consequences: Valves such as stop valves, throttle valves, pressure reducing valves, and check valves all have directionality. If installed upside down, the throttle valve will affect the effectiveness and lifespan of the valve; the pressure reducing valve will not work at all, and the check valve may even pose a danger.
• Measures: General valves have directional signs on the valve body; if not, they should be correctly identified based on the working principle of the valve. The valve cavity of the globe valve is asymmetric left and right, and the fluid should be allowed to pass through the valve port from bottom to top, which reduces fluid resistance (determined by shape) and saves effort when opening (due to the upward pressure of the medium). After closing, the medium does not press on the packing, which is convenient for maintenance. This is why the globe valve cannot be installed backwards. Gate valves should not be installed upside down (i.e., with the handwheel facing down), otherwise the medium will remain in the valve cover space for a long time, which can easily corrode the valve stem and is also prohibited for certain process requirements. At the same time, it is extremely inconvenient to replace the packing. For rising stem gate valves, do not install them underground, otherwise the exposed valve stem will be corroded due to moisture. For lift check valves, ensure that their valve discs are vertical during installation to facilitate flexible lifting. For swing check valves, ensure that their pin shafts are horizontal during installation to facilitate flexible swinging. Pressure reducing valves should be installed upright on horizontal pipelines, and should not be tilted in any direction.

Sleeve type plug valves, known for their excellent sealing performance and precise fluid control capabilities, are widely used in various industrial sectors. Proper installation is crucial for ensuring the valve's normal operation and extending its service life.

1. Preparation Before Installation

(1) Verify Specifications and Model

Before installation, check that the valve's specifications and model meet the system requirements. Ensure that the valve's size, pressure rating, and materials are compatible with the pipeline system's specifications.

(2) Inspect Valve Condition

Examine the valve's appearance and operational status. Ensure that the valve is free from damage, deformation, or other noticeable defects. Verify that the sealing between the plug and sleeve is intact and functioning properly.

(3) Prepare Tools and Materials

Prepare the necessary tools and materials for installation, including wrenches, screwdrivers, sealing gaskets, bolts, washers, and lubricants.

(4) Clean the Piping and Valve

Remove any impurities and debris from the inside of the pipes to ensure that there are no foreign objects at the valve and pipe connections, which could affect the sealing performance.

2. Installation Steps

(1) Position the Valve

Ensure that the valve is correctly positioned within the piping system. Determine the installation direction of the valve according to system requirements. Typically, the flow direction of the valve will be indicated on the valve itself, so make sure the fluid flow direction matches the valve's indication.

(2) Install the Gaskets

Place appropriate gaskets at the flange connections of the valve. The gasket material should be compatible with the medium and capable of withstanding the operating temperature and pressure.

(3) Connect the Valve

Align the valve with the pipeline flanges and secure the valve to the pipeline using bolts. Employ a diagonal, alternating tightening pattern to ensure even bolt loading and avoid flange distortion or poor sealing.

(4) Check Valve Alignment

Before tightening the bolts, check the alignment of the valve with the pipeline. Ensure that the valve's centerline is aligned with the pipeline's centerline to avoid damage or leakage caused by misalignment.

(5) Tighten the Bolts

Use a wrench to evenly tighten the bolts to the specified torque value. Be careful not to overtighten, as this could damage the flanges or the sealing gasket.

(6) Check Valve Operation

After installation, manually operate the valve to ensure smooth opening and closing. Verify that the valve plug moves freely without obstruction and that the sealing performance is effective.

(7) Conduct System Testing

Start up the system and gradually increase the system pressure. Check for any leaks at the valve and its connections. Ensure that the valve operates correctly under working pressure and temperature conditions.

3. Maintenance and Precautions After Installation

(1) Regular Inspections

Regularly inspect the condition of the plug valve to ensure its sealing performance and operational status are in good condition. Particularly during the initial phase of system operation, increase the frequency of inspections to promptly identify and address potential issues.

(2) Avoid Overloading

Avoid operating the valve beyond its designed pressure and temperature limits. Overloading can lead to valve damage or premature failure.

(3) Cleaning and Lubrication

Regularly clean and lubricate the valve, especially when handling corrosive or particulate-laden media, to maintain optimal operating conditions.

(4) Follow Operating Guidelines

Adhere to the valve’s operating guidelines and the manufacturer’s maintenance recommendations to prevent valve failures due to improper operation.

In the valve industry, shut-off valves are widely used in various industrial piping systems due to their excellent regulation and sealing capabilities. However, a key aspect often overlooked during the installation of shut-off valves is their installation orientation. In reality, shut-off valves have specific directional requirements. Proper installation direction is not only crucial for the valve's sealing performance but also directly affects its service life and operational efficiency.

1. Directionality of Shut-Off Valves

The directionality of a shut-off valve is primarily reflected in the restriction of fluid flow direction. Typically, there is an arrow marking on the valve body indicating the direction of fluid flow. This directional marking is not optional but is designed based on the internal structure and working principle of the shut-off valve. Installing the valve according to this marking is a prerequisite for ensuring the proper operation of the valve.

2. Importance of Installing in the Correct Direction

(1) Ensuring Sealing Performance

One of the design intentions of a shut-off valve is to provide excellent sealing performance. The fluid should flow into the valve from below the seat and exit above the disc. When installed according to this direction, the fluid pressure will push the disc more tightly against the seat, forming a reliable seal. If installed in the reverse direction, the fluid may push away from the contact surface between the disc and the seat, leading to seal failure and potential leakage issues.

(2) Reducing Seat Erosion

When the fluid flows in the designed direction, the impact force on the valve seat is minimized, thereby reducing the risk of erosion and wear. If the fluid flows in the reverse direction, the strong impact force will directly act on the valve seat, potentially causing excessive wear and shortening the valve's service life.

(3) Reducing Operating Force

The closing action of a shut-off valve typically relies on assistance from fluid pressure. When installed in the correct direction, the fluid pressure helps in closing the valve disc, reducing the force required for operation. If installed in the reverse direction, operators will need to apply greater force to close the valve, which not only increases the difficulty of operation but may also accelerate mechanical wear of the valve.

In practical applications, it is essential to follow the fluid flow direction indicated by the arrow on the valve body during installation. This ensures that the shut-off valve's design advantages are fully utilized and guarantees the safety and stable operation of the system.

Y-type filters are widely utilized across various industrial sectors, including petroleum, chemicals, pharmaceuticals, food processing, water treatment, and more. These filters effectively remove impurities and particulate matter from fluids, safeguarding downstream equipment from contamination and damage while enhancing product quality and production efficiency. Here are some specific scenarios where Y-type filters are ideally suited:

1. Industry Applications:

(1) Chemicals and Petrochemicals: In chemical and petrochemical processes, Y-type filters filter weakly corrosive materials such as water, ammonia, oils, hydrocarbons, etc., to eliminate impurities and solid particles, protecting production equipment and enhancing product quality.

(2) Oil and Petrochemical Industry: Used for filtering liquids like crude oil, fuel oil, and lubricants, ensuring smooth equipment operation and improving product purity and quality.

(3) Pharmaceutical Industry: In pharmaceutical production, Y-type filters purify solutions, liquids, and slurries, removing impurities and particles to guarantee product purity and quality.

(4) Food and Beverage Industry: During food processing and beverage production, Y-type filters filter juices, beer, milk, drinking water, etc., eliminating suspended solids, microorganisms, and other contaminants, ensuring product hygiene and safety.

(5) Microelectronics Industry: In microelectronics manufacturing, Y-type filters filter chemical solvents, cleaning solutions, etc., in the semiconductor industry, ensuring product quality and smooth operation of manufacturing equipment.

2. Filtration Needs:

(1) Equipment Protection: When fluids contain solid particles, these can clog or damage critical equipment like pipes, pumps, nozzles, and instruments. Y-type filters effectively block these particles, protecting equipment from damage.

(2) System Reliability Enhancement: By filtering impurities from fluids, Y-type filters improve overall system reliability and stability, reducing failures and downtime caused by contaminants.

3. Applicable Media:

Y-type filters are suitable for various media, including water, oil, gas, and corrosive substances, making them widely applicable in fluid processing across industries.

4. Selection Considerations:

When selecting a Y-type filter, factors such as flow requirements, filtration accuracy, media properties, and working pressure must be considered to ensure the appropriate model and specifications are chosen. Different Y-type filter models (e.g., GL11W threaded stainless steel Y-type filter, GL41H flanged stainless steel Y-type filter) have distinct characteristics and application scopes, requiring selection based on actual needs.

Y-type filters are appropriate when filtering solid particles from fluids in pipeline systems to protect equipment and enhance system reliability. Selection should also consider specific application scenarios and requirements.