Knife gate valve installation steps and precautions

Knife gate valves are one of many gate valves that are named for their appearance and are made from a variety of materials. Compared with the general gate valve, it has many advantages, in addition to small size and light weight, its performance is also very superior, so it has been loved by the majority of consumers. Many inexperienced people are inevitably at a loss when installing knife gate valves, and do not know where to start, this article will introduce the installation steps of knife gate valves and the precautions in the process of installation and use, for your reference when necessary.

Installation Steps

1.Before installation, it is necessary to check whether the valve model is consistent with the working conditions. This is very important and has a direct impact on whether the installation can be carried out smoothly, so it is necessary to be extra careful.

2.For soft seals such as rubber and PTFE, check whether there are debris in the inner cavity and sealing surface of the valve, and clean them if so. If there is debris, it will have a negative impact on our subsequent use.

3.The user must consider reserving the necessary space for the valve drive before installation.

4.Electro (electro-hydraulic) valves have been debugged when leaving the factory, when the user uses it for the first time, in order to prevent wiring errors, the valve is manually opened to a half-open state, and then the power supply is turned on for no-load test opening.

5.The air source of the pneumatic (hydraulic) valve must ensure that sufficient gas (liquid) pressure is supplied.

6.When installing, each bolt should be tightened evenly. If it is not tightened, the back will loosen, and it will waste unnecessary manpower and financial resources if it is repaired. Therefore, extra attention should be paid to tightening.

7.Do not strongly impact the valve or twist the valve parts arbitrarily during installation.

8.If the seal on the valve is exposed, the sealing grease must be added regularly.

9.In drier areas, when the valve drive is a spur gear, lubricating oil must be added regularly.

Precautions

1.Before installation, the cavity and sealing surface of the knife gate valve must be checked, and dirt or sand particles are not allowed to be attached;

2.The bolts of each connection part are required to be tightened evenly;

3.Check the packing part to be compressed, not only to ensure the tightness of the packing, but also to ensure that the ram is opened flexibly;

4.Before installing the knife gate valve, the user must calibrate the valve model, connection size and pay attention to the flow direction of the medium to ensure consistency with the valve requirements;

5.When installing the knife gate valve, the user must reserve the necessary space for valve actuation;

6.The wiring of the drive device must be carried out according to the circuit diagram and cannot be changed without authorization.

7.The knife gate valve must be maintained regularly, and should not be collided and squeezed at will, so as not to affect the seal.

Through the above introduction, we have a general understanding of the installation steps of the knife gate valve and some necessary precautions during its installation and use. From this, we can see that the main requirements of the knife gate valve are that there can be no debris during installation, the models at the time of installation must match each other, the gate drive space must be reserved and strictly in accordance with the circuit diagram, and the maintenance must be carried out on schedule. After understanding these basic knowledge, you can install and use the knife gate valve reasonably.

Here are some well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Chaoda, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

1) The installation location, height, and direction of the inlet and outlet must meet the design requirements, and the connection should be firm and tight.

2) All kinds of manual valves installed on the insulation pipeline, the handle shall not be downward.

3) The visual inspection must be carried out before the valve is installed, and the nameplate of the valve should comply with the provisions of the current national standard "General Valve Mark" GB 12220. For valves with working pressure greater than MPA and shut-off on the main pipe, strength and tightness performance tests should be carried out before installation, and they should be used only after they are qualified. During the strength test, the test pressure is times of the nominal pressure, the duration is not less than 5min, and the valve housing and packing should be qualified without leakage.

During the tightness test, the test pressure is multiple of the nominal pressure; The test pressure should meet the requirements of GB 50243 standard for the duration of the test, and the sealing surface of the valve disc should be qualified if there is no leakage.

4) Handwheels, handles and transmission mechanisms are not allowed to be used for lifting, and collisions are strictly prohibited.

5) The gate valve with transmission mechanism shall be installed according to the provisions of the product instruction manual.

The knife gate valve can complete the action control and signal output of the opening and closing positions through the use of solenoid valves, proximity switches and other accessories, and can also complete the automatic control of continuous action. Knife gate valve is widely used in chemical industry, coal, sugar, sewage, papermaking and other fields, and is an ideal sealed gate valve. It is especially suitable for the paper industry to adjust and throttle the pipeline.

Attention should be paid to the following matters in the installation and maintenance of knife gate valves:

1. The handwheel, handle and transmission mechanism stool are not allowed to be used for lifting, and collision is strictly prohibited.

2. The double gate valve should be installed vertically (that is, the valve stem is in a vertical position and the handwheel is at the top).

3. The gate valve with bypass valve should be opened before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force).

4. The gate valve with the transmission mechanism shall be installed according to the provisions of the product instruction manual.

5. If the valve is often opened and closed, lubricate it at least once a month.

The manual knife gate valve is a special type of valve, and its working performance and installation steps are described below:

Working performance: 1Cut-off capacity: The manual knife gate valve has good cut-off performance, which can effectively cut off the flow of fluid and prevent leakage.

2.Fluid Flow Direction: Manual knife gate valves are suitable for one-way or two-way fluid flow direction, which can be selected according to needs.

3.Low flow resistance: Due to the relatively straight internal flow channel, the fluid flow resistance is small, which helps to reduce energy loss and fluid pressure drop.

4.Quick Opening and Closing: The ram of the manual knife gate valve can be quickly raised and lowered for quick opening and closing operation, which helps to quickly cut off the fluid in an emergency.

5.Adaptation to media: Manual knife gate valve is suitable for different media such as liquid, gas, particulate suspended solids, etc., and has strong adaptability.

Installation Steps: The following are general installation steps for manual knife gate valves, but specific steps may vary depending on the manufacturer and model. Please consult the product leaflet and follow the manufacturer's recommendations before installation.

1.Select the location: According to the process requirements, select the appropriate position to install the manual knife gate valve. Ensure that the valve is easy to operate and maintain, and is not hit by external forces.

2.Support Installation: Secure the valve in the installation position with the appropriate bracket or flange connection to ensure that the valve is secure without vibration or displacement.

3.Connecting the pipeline: connect the manual knife gate valve with the pipeline, connect it according to the connection method (flange, thread, etc.), and ensure that the connection is reliable and reliable.

4.Adjust the position: Adjust the opening and closing position of the valve, so that it can operate normally and control the flow of fluid in the working state.

5.Tighten the bolts: Make sure the connecting bolts of the valve are tightened reliably to avoid leakage and loosening.

6.Test Operation: After installation, test the operation of the manual knife gate valve, including the operation of opening, closing, and intermediate positions, to ensure that the valve is working properly.

7.Anti-corrosion and anti-rust: According to the environmental requirements, consider anti-corrosion and anti-rust treatment of the valve to prolong the service life of the valve.

Knife gate valves. Please note that the installation procedure for manual knife gate valves may vary depending on the model, connection and application requirements. During installation, make sure to follow the product instructions and manufacturer's recommendations to ensure the safe operation and proper operation of the valve.

If you have any questions, it is recommended to contact and consult with a professional engineer or manufacturer.

The installation, maintenance and selection of knife gate valves are all key factors in ensuring the proper operation and longevity of the valve. The following are the key points that need to be paid attention to when installing and maintaining knife gate valves and purchasing, and also mention Haidun special valves as an example:

Installation of knife gate valves:

1.Installation location: Choose the right installation location to ensure that the valve is easy to operate, maintain and service.

2.Secure fixation: Secure the valve in the mounting position with appropriate brackets and flange connections to avoid residual vibration and displacement.

3.Seal Inspection: Inspect the seal, sealing surface, and other components before installation to ensure that the valve is fully sealed when closed.

Maintenance of knife gate valves:

1.Regular inspection: Regularly check the key appearance, operating mechanism, seals and other components of the valve, and deal with problems in time.

2.Lubrication and maintenance: Lubricate the operating mechanism and moving parts to ensure the smooth opening and closing of the valve.

3.Clean the valve body: Clean the inside of the valve body regularly to avoid impurities and deposits affecting the normal operation of the valve.

4.Tighten the bolts: Check the valve body connection bolts to ensure they are tightened reliably and avoid leaks.

Key points to pay attention to when purchasing knife gate valves:

1.Medium characteristics: Select the appropriate material according to the nature of the process medium, and consider the corrosiveness, temperature, pressure and other factors of the medium.

2.Valve Type: Choose different types of knife gate valves such as manual, electric, pneumatic, etc., according to your needs to ensure that you match the process requirements.

3.Brand reputation: Choose a manufacturer with good brand reputation and quality assurance to ensure reliable valve quality.

4.Technical parameters: pay attention to the rated pressure, nominal diameter, sealing performance and other technical parameters of the valve to ensure that it meets the process requirements.

5.Ease of Maintenance: Consider the maintenance performance of the valve and choose a design that is easy to maintain and replace parts.

As an example, Haidun Special Valve is a manufacturer specializing in the production of industrial valves, and may provide a variety of knife gate valve products. When purchasing the knife gate valve of Haidun special valve, you can pay attention to the following aspects:

Product quality: Check the product quality certification, production process, etc. of Haidun special valves to ensure that the purchased valves have reliable performance.

Technical support: Find out whether Haidun special valve provides technical support and after-sales service, so as to get help during use.

Scope of application: Learn more about the scope of application of Haidun special valve knife gate valve to ensure that your process requirements are met.

Please note that specific purchase and roll-on/roll-off details may vary by model and application. When selecting and using knife gate valves, it is recommended to consult and guide in detail with the manufacturer or professional engineers.

Knife gate valve is a commonly used industrial valve with some unique technical characteristics and precautions when it is used. Here is some information about the technical characteristics and precautions for use of knife gate valves::

Knife gate valves. Technical features:

1.Simple structure: The structure of the knife gate valve is relatively simple, mainly composed of the valve body, valve stem and gate, so it is relatively easy to maintain and repair.

2.Good sealing: The knife gate valve has good sealing performance, which can achieve good shut-off fluid flow, and is suitable for working conditions that require strict control of fluid.

3.Small flow resistance: The internal flow channel of the knife gate valve is relatively straight, and the flow resistance is relatively small, which is suitable for occasions that need to reduce fluid pressure loss.

4.Corrosion resistance: Knife gate valves can be made of different materials of rams and seals to adapt to different working media and corrosive environments.

5.Wide range of applications: Knife gate valves are suitable for the control and shut-off of various media such as liquids, gases and steam.

Pneumatic knife gate valve.

Precautions for use:

1.Operation specification: When operating the knife gate valve, it should be carried out in accordance with the operation specification, and excessive force or improper operation should be avoided to prevent damage to the valve door or affect the sealing performance.

2.Regular maintenance: Regularly maintain the knife gate valve, check whether the valve body, gate plate and sealing parts are worn or damaged, and replace or repair if necessary to ensure the normal operation of the valve.

3.Media Selection: Select the appropriate material according to the nature of the working medium to prevent the valve from failing or leaking due to media corrosion.

4.Anti-freezing measures: In cold areas, anti-freezing measures should be taken to prevent damage to the valve caused by icing inside the gate valve.

5.Valve position: When installing the knife gate valve, pay attention to the installation position of the valve to ensure that it is easy to operate and avoid being hit by external forces.

6.Avoid excessive closing: During use, avoid excessive closing of the ram to avoid damage to the sealing surface or jamming of the ram.

7.Protection against vibration and shock: In fluid flow, avoid severe vibrations and shocks that can adversely affect knife gate valves.

Knife gate valves. Please note that the specific technical characteristics and precautions for use of knife gate valves may vary depending on the manufacturer and model, and the technical parameters and instructions of the valve used should be detailed before use.