What are the valve brands with SIL2 certification?

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.

SIL3 is a certification level within SIL certification.

SIL certification is divided into 4 levels, SIL1, SIL2, SIL3, and SIL4, including two levels: product and system. Among them, SIL4 has the highest requirements.

SIL (Safety Integrity Level) - Safety integrity level.

The European Committee for the Standardization of Electroicons (abbreviation for CENELEC) is one of the three major standardization organizations in Europe. Cenelec is responsible for European standardization in the field of electronic engineering. CENELEC, together with Telecommunication Standardization (ETSI) and CEN (Standardization in all other technical areas), forms the European Standardization System.

In the petrochemical, steel, electric power, pharmaceutical and other industrial fields, most of the safety issues rely on the instrumentation and control system to perform the correct function, and this safety depends on the function of the system, which is called "functional safety". Functional safety prevents hazards caused by the failure of a safety-related system or equipment.

1) SIL level evaluation of instrumentation safety system: Mr. Liu Jianhou, senior engineer of SIPAI of Machinery Industry Instrumentation Reliability Technology Center, said after a comprehensive introduction of some basic concepts of functional safety that instrumentation safety system (SIS) has a wide range of applications in a variety of safety systems. The SIS consists of field sensors, transmitters, controllers, IO modules, actuators, IO interfaces (e.g. isolated barriers) and related software.

Both protection systems and automation control systems require safety functions as well, which can be implemented independently or in combination in practice. In the past, reliability was not considered to be a system failure, but now the problem of system failure is studied. Recently, the SIS technology has been used in 8 subsystems of a large chemical system, a gas separation project, instrumentation products such as Rosemount's 3051 pressure transmitter and Siemens' related modules and Sanson's terminal equipment, the purpose of SIS functional safety assessment is to investigate and judge the functional safety achieved by SIS and related systems.

The main quantitative measures of the functional safety of SIS and related systems are the Safety Integrity Level (SIL) and Safety Failure Score, while the SIL of the instrument and its system is confirmed by FMEDA (Failure Mode Effect Effects Analysis) and PFD (Mean Probability of Failure When Required) calculations. According to IEC61508 and IEC61511 standards, the functional safety of the project was evaluated, and the SIL level of the 8 protection systems was determined, which met the SIL2 and other requirements proposed by the user.

2) SIL level assessment of safety products: Mr. Anton Heinshill of Cooper Claus-Hahns in Germany introduced that SIL is a good way to evaluate functional safety. From the user's point of view, if there are few people in the workshop and the number of people in the workshop is small, it can be considered as SIL2; If there are a large number of people, SIL4 can be considered, but if there is an evacuation passage, the SIL level can be reduced.

From the perspective of the SIL level evaluation requirements of the product, SIL1 can be completed by an engineer of the factory, SIL2 should be completed by a certain department of the factory, the evaluators of SIL1 and SIL2 should be independent, not product designers, and SIL3 and SIL4 should be completed by an independent certification body outside the factory. Since SIL1 and SIL2 can be evaluated in the factory (within the company) according to relevant standards and legal liabilities, SIL1 and SIL2 are the majority of safety products, most of which are SIL2, and SIL2 is also the most widely used. If in one system, the sensor is SIL2 and the others are SIL3, then the whole system is SIL2

SIL is the abbreviation of Safety Integrity Level, which translates to Safety Integrity Level.

SIL was first proposed in the IEC61508 functional safety standard promulgated in 1998, which is a division of functional safety levels.

IEC61508 classifies SILs into 4 levels, namely SIL1, SIL2, SIL3 and SIL4. The level of SIL that the safety-related system should achieve is obtained by risk analysis, that is, by analyzing the severity of risk consequences, the time and frequency of risk exposure, the probability of not avoiding risks and the probability of undesirable events. The higher the level, the lower the probability of dangerous failure.

SIL Overall Safety Level PFD Probability of Failure as Required PFH Probability of Dangerous Failure per Hour.

Equipment system failures in the plant can cause environmental damage, and personnel damage. The SIL concept enables plant operators to divide the requirements of their equipment according to the expected damage. In addition, the SIL concept provides a way for product manufacturers to describe the failure performance of their products.

All systems, even the most sophisticated, can fail.

The SIL concept is to assess failures and their consequences. The results of the evaluation are calculated based on probability. In order to simplify the safety assessment, the SIL concept classifies the safety level into SIL1-SIL4 (SIL4 being the highest safety level).

The determination of the safety integrity level requires the risk analysis of the safety system, which is the goal and basis for the research and development of the system, and the basis for evaluating whether the system can ensure safety.

Security assessment system.

After the completion of the research and development of safety-related systems, it also involves the safety evaluation and recognition of the entire system, that is, safety assessment. It is to check whether the safety management of the project is perfect and whether it is consistent with the safety plan. Safety-related systems and safety requirements specifications are compared to evaluate whether they are sufficient for control system risk and whether the system can meet the safety requirements specification.

The objective of the safety assessment is to investigate and draw conclusions about the level of functional safety achieved by the safety-related systems of the e-pe pe.

Summary. Dear, the following is the extended information: The valve is a control component in the fluid transfer system, which has the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief.

Valves for fluid control systems range from the simplest shut-off valves to the most complex valves used in automated control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves, etc.), chrome-molybdenum steel valves, chrome-molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc.

Dear, the products for SIL certification are not only valves, but also cylinder actuators, pneumatic membrane actuators, floating positive and virtual cover soft seal ball valves, floating hard seal ball valves, fixed soft seal ball valves, fixed hard seal ball valves, midline butterfly valves, double eccentric butterfly valves, triple eccentric butterfly valves and other products export sales are subject to SIL certification.

Dear, the following is the extended information: Valve is a control component in the fluid fracturing and transmission system, which has the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems range from the most basic shut-off valves to the most complex automatic control systems.

Valves can be used to control the flow of various types of fluids such as air, water loss, steam, various corrosive media, slurries, oils, liquid metals and radioactive media. Valves are also divided into cast iron valves, cast steel valves, stainless steel valves, etc.), chrome-molybdenum steel valves, chrome-molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc.