Does the fire gate valve have to be made of open rods?

The fire gate valve must be made of open rods, yes, because this is more effective, otherwise there is no way, this is fixed.

Not necessarily, you can also use the dark bar gate valve, but there are requirements for the dark bar gate valve, such as the opening and closing scale and the self-locking device.

Here are some of the 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, Su Yan, 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.

It is not mandatory, first of all, it should meet the design requirements, and if the design is not clearly stipulated, it should meet the requirements of the specification, and the use of dark rod gate valves with opening and closing scales is allowed.

1. The valve of the buried pipeline should be a dark rod gate valve with an opening and closing scale, which should be set in the valve well.

Corrosion-resistant open rod gate valve can be used internally;

2. The valves of indoor overhead pipelines should be butterfly valves, open rod gate valves or dark rod gate valves with opening and closing scales, etc.;

3. Outdoor overhead pipelines should be equipped with a dark rod gate valve with opening and closing scale or a corrosion-resistant open rod gate valve;

4. The suction pipe of the fire pump should be provided with an open rod gate valve or a butterfly valve with a self-locking device, but when the concealed rod valve is set, it should be equipped with an opening scale and a mark; When the pipe diameter exceeds DN300, it is advisable to set up an electric valve;

5. A check valve should be set on the outlet pipe of the fire pump.

Open rod gate valve; When butterfly valves are used, they should be equipped with self-locking devices; When the pipe diameter is greater than DN300, it is advisable to set up an electric valve.

Is there a strong regulation on fire protection that gate valves should be used with open rods?

Hello dear! We'll be happy to answer for you. Is there a strong regulation on fire protection that gate valves should be used with open rods?

Answer: Hello dear, the fire gate valve must be made of open rod, right, because it is more effective, otherwise there is no way, this is fixed well, it is not mandatory, first of all, it should meet the design requirements, the design is not clearly stipulated should meet the requirements of the specification, and the use of the dark rod gate valve with opening and closing scale is allowed. 1. The valve of the buried pipeline should be a dark rod gate valve with an opening and closing scale, and a corrosion-resistant open rod gate valve can be used when it is installed in the valve well; 2. The valves of indoor overhead pipelines should be butterfly valves, open rod gate valves or dark rod gate valves with opening and closing scales, etc.; 3. Outdoor overhead pipelines should be equipped with a dark rod gate valve with opening and closing scale or a corrosion-resistant open rod gate valve; 4. The suction pipe of the fire pump should be provided with an open rod gate valve or a butterfly valve with a self-locking device, but when the concealed rod valve is set, it should be equipped with an opening scale and a mark; When the pipe diameter exceeds DN300, it is advisable to set up Kaiming local electric valve; 5. The outlet pipe of the fire pump should be equipped with Huaiyu check valve and open rod gate valve; When butterfly valves are used, they should be equipped with self-locking devices; When the pipe diameter is greater than DN300, it is advisable to set up an electric valve.

Is there a strong regulation on fire protection that gate valves should be used with open rods?

Hello, I am happy to answer for you, it is not mandatory, first of all, it should meet the design requirements, and if the design is not clearly stipulated, it should meet the requirements of the specification, and it is allowed to use the dark rod gate valve with opening and closing scale. 1. The valve of the buried pipeline should be a dark rod gate valve with opening and closing scale, and a corrosion-resistant open rod gate valve can be used when the mold is set in the valve well; 2. The valves of indoor overhead pipelines should be butterfly valves, open rod gate valves or infiltration service and dark rod gate valves with opening and closing scales; 3. Outdoor overhead pipelines should be equipped with a dark rod gate valve with opening and closing scale or a corrosion-resistant open rod gate valve; 4. The suction pipe of the fire pump should be provided with an open rod gate valve or a butterfly valve with a self-locking device, but when the concealed rod valve is set, it should be equipped with an opening scale and a mark; When the pipe diameter exceeds DN300, it is advisable to set up an electric valve; 5. Check valves and open rod gate valves should be set on the outlet pipe of the fire pump; When butterfly valves are used, they should be equipped with self-locking devices; When the pipe diameter is greater than DN300, it is advisable to set up an electric valve.

Summary. The use of open rod valve has the following drawbacks: 1. When the valve is switched, the valve stem should be lifted and lowered, which occupies a large space.

If the pipeline is not buried very deeply, the valve well will hinder the opening of the valve, and when the valve is opened, the valve manhole cover will not be covered or the valve will not be fully opened. 2. After the number of switches is more, the water leakage on the contact surface between the valve stem and the flange cover is serious, and the packing packing needs to be changed frequently. 3. If it is not often switched, a part of the valve stem is exposed outside the valve body for a long time, and in the humid environment of the valve well, the exposed valve stem is very easy to oxidize, rust and die, and once it needs to be closed, it will not be closed.

Otherwise, grease should be applied frequently. In short, the maintenance workload is large. Dark rod valves will not have these problems, the probability of water leakage is also small, and of course, the maintenance workload is also small, for reference.

Hello! Dark stem valve outdoor valve installed in the valve well, according to the use of experience, it is recommended that you use the dark rod valve.

The use of open rod valve has the disadvantages of referring to the key chain: 1. When the valve is switched, the valve stem should be lifted and lowered, which occupies a large space. If the pipeline is not buried very deeply, the valve well will hinder the opening of the valve, and when the valve is opened, the valve manhole cover will not be covered or the valve will not be fully opened.

2. After the number of switches is more, the water leakage on the contact surface between the valve stem and the flange cover is serious, and the packing packing needs to be changed frequently. 3. If it is not often switched, a part of the valve stem is exposed outside the valve body for a long time, and in the humid environment of the valve well, the exposed valve stem is very easy to oxidize, rust and die, and once it needs to be closed, it will not be closed. Otherwise, grease should be applied frequently.

In short, the maintenance workload is large. The dark rod valve will not have these problems, and the probability of water leakage is also small, and the maintenance workload is also small for reference.

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The openrod gate valve is a commonly used valve that can be used to intercept and regulate the flow rate in the pipeline. It is characterized by the movement of the valve core up and down by the rotation of the valve rod, thereby opening or closing the valve material channel, usually operated by a handwheel, a canatan electric or pneumatic device. The open rod gate valve is mainly suitable for the control of water, oil, gas and other media.

Explosion-proof gate valve is a special type of gate valve designed for use in hazardous environments. In this type of gate valve, all internal components have been carefully designed to ensure that they can still work reliably and reliably in the environment of gases, liquids, diesel, oil fumes and other environments that are easy to cause **. Explosion-proof gate valves have many special requirements in terms of structure, such as sealing performance, material strength, interface ground requirements, etc., to ensure that it can still operate normally in extreme environments.

Therefore, the main difference between an open rod gate valve and an explosion-proof gate valve is the special environmental requirements of the explosion-proof gate valve.

Exposed rod gate valve and explosion-proof gate valve are two different types of gate valves, and the differences are as follows:

1.Exposed rod gate valve means that during operation, the rod of the valve is exposed to the outside; The explosion-proof gate valve is equipped with a special explosion-proof mechanism on the outside to ensure that the purpose of explosion-proof can be achieved when used in dangerous environments.

2.Open rod gate valves are usually used for flow control of some non-hazardous media in the industrial field, and are more convenient to use; The anti-explosion gate valve is suitable for dangerous occasions, such as petroleum, chemical and other industries, and has the advantages of more reliable safety performance.

3.In terms of design, explosion-proof gate valves are usually more complex than open-rod gate valves, and the valve body is also equipped with some special accessories and devices to meet the needs of use in dangerous environments.

4.Finally, the explosion-proof gate valve is also higher than the open rod gate valve, which is due to its higher design and manufacturing requirements, and the leather fiber also needs to cope with the needs of hazardous occasions.

The opening and closing parts of the open and vertical key rod gate valve are the ram, and the movement of the ram is perpendicular to the direction of the slag coarse fluid, and the open rod gate valve can only be fully opened and closed, and can not be adjusted and throttled.

Explosion-proof valves are used in dust removal systems containing combustible gases or combustible substances, and can be used as a pressure relief device for explosive pipes or equipment.

1.The difference between an open rod gate valve and an explosion-proof gate valve is that its scope of application and use scenarios are different.

2.The open rod gate valve is suitable for general industrial occasions, the main characteristics are simple structure, large diameter, good valve sealing performance, suitable for high pressure, high temperature and high viscosity media.

The explosion-proof gate valve is suitable for the occasion of flammable, explosive and toxic media, the main characteristics are firm structure, special material selection, fiber buried explosion-proof, fireproof, anti-static and other characteristics, suitable for dangerous places and special media.

3.It should be noted that due to its special design and material selection, the explosion-proof gate valve is higher than the open rod gate valve, but it has the advantage of no liquid leakage in the safety performance of special occasions.

1.The difference between an open rod gate valve and an explosion-proof gate valve lies in the different uses and characteristics.

2.The open rod gate valve is a commonly used valve that is pure and pure, and its rod is visible on the outside, which is suitable for general working conditions, such as the control of water, oil, gas and other media.

The explosion-proof gate valve is a special valve used in the most dangerous occasions, which has explosion-proof performance and can avoid accidents caused by medium combustion.

3.In addition, there are also some special requirements for the material, structure and manufacturing skills of explosion-proof gate valves to ensure their explosion-proof stove core performance, so they will be more expensive and more limited in scope of use than open-rod gate valves.

There is no specification for such a requirement. The installation of open rod gate valves is only to make it easier to show the opening and closing status of the valve, especially in important equipment rooms such as fire pump rooms, which are generally designed in this way.

This should not be a mandatory provision, it depends on the designer...... right

Summary. 1. The open rod gate valve can see the screw rod, but the dark rod can not see the lead screw; 2. The open rod gate valve is used to lift or lower the valve disc through the threaded transmission between the valve stem and the steering wheel; When the dark rod gate valve is switched, the steering wheel and the valve stem are connected together and relatively immovable, and it is driven by the valve stem to rotate at the fixed point to drive the valve disc to lift up and down to complete the opening and closing; 3. The transmission thread of the dark rod gate valve is located inside the valve body, and in the process of opening and closing, the valve stem only rotates, and the gate plate rises and falls in the valve body; The valve stem of the open rod gate valve drives the gate plate to rise and fall together, and the transmission thread on the valve stem is outside the valve body, and the opening and closing and position of the gate can be intuitively judged according to the movement direction and position of the valve stem; 4. The height of the dark rod gate valve is small; Exposed rod gate valves require a large installation space; 5. The structure of the open rod gate valve is beneficial to the lubrication of the valve stem, and the degree of opening and closing is obvious; The stem thread of the dark rod gate valve not only cannot be lubricated, but also directly accepts the erosion of the medium and is easy to be damaged. Therefore, open rod gate valves are more widely used.

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Please wait patiently for a few minutes, we are sorting it out, and we will answer you immediately, and please do not end the consultation.

1. The open rod gate valve can see the screw rod, but the dark rod can not see the lead screw; 2. The open rod gate valve is used to lift or lower the valve disc through the threaded transmission between the valve stem and the steering wheel; When the dark rod gate valve is switched, the steering wheel and the valve stem are connected together and relatively immovable, and it is driven by the valve stem to rotate at the fixed point to drive the valve disc to lift up and down to complete the opening and closing; 3. The transmission thread of the dark rod gate valve is located inside the valve body, and in the process of opening and closing, the valve stem only rotates, and the gate plate rises and falls in the valve body; The valve stem of the open rod gate valve drives the gate plate to rise and fall together, and the transmission thread on the valve stem is outside the valve body, which can intuitively judge the opening and closing and position of the gate according to the movement direction and position of the valve stem. 4. The height and size of the dark rod gate nuclear leakage valve are small; Exposed rod gate valves require a large installation space; 5. The structure of the open rod gate valve is beneficial to the lubrication of the valve stem, and the degree of opening and closing is obvious; The stem thread of the dark rod gate valve not only cannot be lubricated, but also directly accepts the erosion of the medium and is easy to be damaged. Therefore, open rod gate valves are more widely used. Hope mine can help you before you <>