Safety valve installation specifications, what are the safety valve model specifications

The requirements for the installation of safety valves are as follows:

1. The safety valve should be installed vertically, and should be installed in the part of the vapor phase space above the liquid level of the pressure vessel, or on the pipeline connected to the gas phase space of the pressure vessel.

2. The cross-sectional area of the connecting pipe fittings between the pressure vessel and the safety valve shall not be less than the inlet cross-sectional area of the safety valve, and its pipe should be as short and straight as possible.

3. When two or more safety valves are installed on a connecting port of a pressure vessel, the area of the inlet of the connecting port shall be at least equal to the sum of the inlet cross-sectional area of these safety valves.

4. It is generally not advisable to install a globe valve between the safety valve and the pressure vessel.

Door. In order to achieve the best calibration of the safety valve, a rupture disc device can be installed between the safety valve and the pressure vessel. For pressure vessels containing extreme, highly or moderately hazardous mediums, flammable media, corrosive, viscous media or valuable mediums with a degree of toxicity, in order to facilitate the cleaning and replacement of the safety valve, a shut-off valve can be installed between the safety valve (rupture disc device) and the pressure vessel with the approval of the technical person in charge of pressure vessel safety of the user unit and the formulation of reliable preventive measures.

During the normal operation of the pressure vessel, the shut-off valve must be fully open (with lead seal.

or locking), the structure and diameter of the globe valve.

It should not impede the safe discharge of the safety valve.

5. The installation position of the safety valve should be convenient for inspection and maintenance.

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 are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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.

Safety valve model specification nominal diameter ( ) nominal pressure (mpa), setting pressure (mpa), sealing pressure (mpa), weight.

Safety valves belong to the automatic valve category, which are mainly used in boilers, pressure vessels and pipelines, and the control pressure does not exceed the specified value, which plays an important role in protecting personal safety and equipment operation. Note: Safety valves must be pressure-tested before they can be used.

Common safety valves are generally as follows:1. According to the overall structure and the form of the loading structure, it can be divided into three types: hammer lever safety valve, spring safety valve and control type.

2. According to the ratio of the opening height of the disc type to the diameter of the valve flow, it can be divided into micro-opening type and full-opening safety valve.

3. According to the way of gas discharge of the safety valve, it can be divided into three types: fully enclosed, semi-enclosed and open.

Installation precautions.

1. All kinds of safety valves should be installed vertically.

2. There should be no resistance at the outlet of the safety valve to avoid pressure.

3. The safety valve should be specially tested before installation, and its tightness should be checked.

4. The safety valve in use should be checked regularly.

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A: Safety valve installation specifications implement the standard safety valve should be installed upright and close to the protected equipment or pipeline. If it cannot be arranged close to each other, the total pressure drop from the protected equipment or pipeline to the inlet pipe of the safety valve shall not exceed 3% of the constant pressure value of the safety valve.

The safety valve should be equipped with an overhaul platform. When arranging the heavy safety valve, it is necessary to consider the possibility of hoisting after the safety valve is disassembled, and a boom should be set up if necessary. The safety valve inlet pipe should be with a long radius elbow.

The design of the outlet pipeline of the safety valve should consider that the back pressure should not exceed the constant pressure of the safety valve. The back pressure of the ordinary spring-type Anshengqing full valve does not exceed 10% of the constant pressure value of the safety valve. When the medium discharged into the venting main pipe or de-flare main pipe contains condensate or condensable gas, the outlet of the safety valve should be higher than the main pipe; If the liquid is not carried, drainage measures should be taken.

1) The newly installed safety valve should be accompanied by a product certificate, and the safety valve should be recalibrated before installation, sealed and calibrated.

2) The safety valve should be installed vertically and installed at the vapor interface of the container or pipeline.

3) The outlet of the safety valve should have no resistance to avoid back pressure, if the discharge pipe is installed, its inner diameter should be greater than the outlet diameter of the safety valve, the safety valve exclusion port should pay attention to anti-freezing, for the container containing flammable or toxic and highly toxic media, the discharge pipe should be directly connected to the outdoor safe place or have facilities for proper treatment, and the discharge pipe is not allowed to install any valve.

4) There shall be no valve between the pressure equipment and the safety valve, and the container containing flammable, explosive, toxic or viscous media can be installed with a globe valve for easy replacement and cleaning, and its structure and diameter size shall not hinder the normal operation of the safety valve. During normal operation, the cut-off Qingling high valve must be fully opened and sealed.

5) The cross-sectional area of the connecting short pipe between the safety valve and the boiler pressure vessel shall not be smaller than the flow section of the safety valve, and the whole safety valve shall be installed on a pipe at the same time, and the cross-sectional area of the pipe shall not be less than the sum of the flow cross-sectional area of the safety valve.

What are the key points of the installation and design of the safety valve pipeline, and the following Zhongda Consulting will answer for you.

1. The safety valve should be installed upright and close to the protected equipment or pipeline. If it cannot be arranged close to the arrangement, the total pressure drop of the pipe from the protected equipment or pipeline to the inlet of the safety valve should not exceed 3% of the constant pressure value of the safety valve

2. The safety valve should be equipped with an overhaul platform. When arranging the safety valve of the weight of the Yuqing University, it is necessary to consider the possibility of hoisting the safety valve after disassembly, and if necessary, the wheel grip boom should be set.

3. The inlet pipe of the safety valve should adopt a long radius elbow.

4. The design of the outlet pipeline of the safety valve should consider that the back pressure does not exceed a certain value of the constant pressure of the safety valve. For ordinary spring-type safety valves, the back pressure does not exceed 10% of the constant pressure value of the safety valve

5. When the medium discharged into the venting main pipe or the de-flare main pipe contains condensate or condensable gas, the outlet of the safety valve should be higher than the main pipe; Otherwise, drain the liquid.

6. The outlet pipeline of the safety valve discharged into the closed system should flow along the medium to the 45 target benzene glaze and the mu of the 45 target benzene glaze and the mu of the sea and the grass should be dismantled and discharged. /p>

7. When there is a shut-off valve on the inlet and outlet pipeline of the safety valve, a single gate valve should be selected, and the lead seal should be opened, and the valve stem should be installed horizontally to avoid the valve plate slipping when the pin connecting the valve stem and the valve plate is corroded or loose. When the safety valve is equipped with a bypass valve, the valve should be closed with a lead seal.