Comprehensive Guide to Valve Connection Methods and Standards

Valves are crucial components in the industrial field, commonly used to regulate and control the flow of various fluids. It is necessary for us to understand the connection methods and standards of valves when using them. In this article, we will comprehensively introduce the connection methods and standards of valves. There are various connection methods and standards for valves, and this article will introduce several common ones.



1. Flange Connection
Flange connection is a commonly used connection method in pipeline systems. It is suitable for large-diameter valves and has advantages such as firm connection, good sealing, and safety. Flange connections include flat flange, raised face flange, ring joint flange, and butt-welded flange.

Flat flange connection involves matching the valve with the pipeline flange and securing them together with bolts. The advantage of this connection method is its simple structure and ease of disassembly. The disadvantage is that the sealing is not good enough and it is not suitable for high-pressure, high-temperature, and corrosive media applications.

Raised face flange connection involves matching the raised face flange with the pipeline flange and securing them together with bolts. The advantages of this connection method are tight connection, good sealing, and suitability for high-temperature, high-pressure, and corrosive media applications. The disadvantage is that the structure is more complex, making installation more difficult.

Ring joint flange connection involves inserting the valve tip directly into the flange hole and securing them together with bolts. This connection method is suitable for large-diameter, low-pressure, and easy-to-disassemble applications. The disadvantage is that the sealing is relatively poor.

Butt-welded flange connection involves welding the valve onto the pipeline flange and securing them together with bolts. This connection method is suitable for high-pressure, high-temperature, and corrosive media applications. The disadvantage is that the structure is more complex, making installation more difficult.

COVNA Flange Electric Ball Valve

● Torque Range from 50Nm to 4000Nm.
● Valve type : 2-Ways & 3-Ways & 4 Way Flange Ball Valve (T Type and L Type)
● Flange Standard: ANSI, JIS, DIN, GB are available.
● TFM 1600 Seat Material (PTFE, RTFE, TFE/SS Options)
● Blow-out Proof Stem Pressure Balance Hole in Ball Slot
● Widely used in chemical industry, paper & pulp, water treatment, etc.

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COVNA Pneumatic Flange Ball Valve

● Features: Long Service Life, Eco-Friendly, Easy Installation, etc
● Actuator Type: Spring Return(Single Acting) and Double Acting
● Valve Type: 2-Ways & 3-Ways & 4 Way Flange Ball Valve (T Type and L Type)
● Rotation: Quarter-turn
● Applicable Standard: GB, ANSI, JIS,DIN
● Connection Type: Flange End
● Suitable Medium: Water, Oil, Air, Gas, etc

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2. Threaded Connection
Threaded connection involves connecting the valve to the pipeline through threads. This connection method is suitable for small-diameter valves, with a simple structure and easy disassembly. However, the strength and sealing of threaded connections are not as good as flange connections.

COVNA Threaded Electric Ball Valve

● Torque: 50N.m or 4000N.m
● Rotation: Quarter-turn
● Actuator Type: ON OFF Type, Regulating Type and Intelligent Type
● Material: Stainless Steel
● Connection: 3PC Thread
● Suitable for water, oil, air, etc. Widely used in HVAC, irrigation, water treatment, etc.

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COVNA Threaded Pneumatic Ball Valve

● Available In Spring Return(Single Acting) And Double Acting Pneumatic Actuator.
● High Torque Up To 4678Nm.
● 3-Piece Ball Valve Design. Easy To Maintain And Extend Service Life.
● NPT Thread and G Thread are Available.
● Connection Type: Thread(Male & Female)
● Wide Application Range.
 

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3. Welding Connection
Welding connection involves welding the valve to the pipeline. This connection method is suitable for high-pressure, high-temperature, and corrosive media applications. Welding connections have high strength, good sealing, and a simple structure. However, welding connections require a high level of technical expertise and operational requirements.

COVNA Welding Electric Ball Valve

● Features: Compact Design, Eco-friendly, Easy Installation, etc
● Torque: 50N.m or 4000N.m
● Rotation: Quarter-turn
● Actuator Type: ON OFF Type, Regulating Type and Intelligent Type
● Material: Stainless Steel
● Connection: 3PC Welding

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COVNA Welding Pneumatic Ball Valve

● Available In Spring Return(Single Acting) And Double Acting Pneumatic Actuator.
● High Torque Up To 4678Nm.
● 3-Piece Ball Valve Design. Easy To Maintain And Extend Service Life.
● NPT Thread and G Thread are Available.
● Connection Type: Welding
● Wide Application Range.

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4. Clamp Connection
Clamp connection involves fixing clamps around the valve and securing them to the pipeline to achieve the connection. This connection method is suitable for small-diameter valves, with a simple connection and convenient disassembly. However, the strength and sealing of clamp connections are not as good as flange connections.

COVNA Tri Clamp Electric Ball Valve

● ISO5211 standard direct mounting actuator
● Antistatic device between the core and the valve body
● Double butterfly shaped spring automatic compression packing design
● Allow pressure differential: Less than nominal pressure 1.6MPa
● Leakage: Zero leakage, Return difference: ±2.5%

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COVNA Tri Clamp Pneumatic Ball Valve

● Rack and pinion pneumatic actuator with high torque up to 4678Nm.
● Available in spring return and double acting type actuator to meet your project's requirements.
● Easy to install and easy to repair to extend the lifespan.
● 1 Million lifespans. Offering a cost-effective valve solution for your project.

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In conclusion, different connection methods for valves are suitable for different applications. When choosing a connection method, it is important to make a reasonable choice based on the actual situation to ensure the efficiency and safety of the pipeline system.

Next, let’s take a look at the standards for valves. Valve standards refer to the unified specifications for performance parameters, structural design, dimensions, connection methods, etc. Here are some introductions to valve standards:
1. American National Standards (ANSI): This is a standard established by the American National Standards Institute, which includes standards in various fields, including valve standards.

2. Japanese Industrial Standards (JIS): These are industrial standards established by the Japanese government’s standardization organization, which also includes valve standards.

3. German Institute for Standardization (DIN): This is a standard established by the German standardization organization and is also widely used in many European countries.

4. International Organization for Standardization (ISO): This is a standard established by the International Organization for Standardization, which is globally recognized as the highest standard.

Valve standards have different requirements for different application environments, and we need to choose the appropriate valve standards based on specific situations.

When selecting valves, we need to pay attention to the following points:
1. Identify valve quality: Identify valve quality through various methods such as checking valve markings and inspecting valve appearance.

2. Select suitable applications: Different valves are suitable for different applications, and we need to choose the appropriate valve based on specific situations.

3. Assess valve performance: We need to assess valve performance based on specific conditions, such as temperature, pressure, flow rate, etc., and select the appropriate valve.

4. Proper installation and commissioning: Proper installation and commissioning of valves are crucial for their performance. We need to carefully read the valve user manual and install and commission the valve correctly.

In summary, valve connection methods and standards are crucial for the use of valves. We need to choose the appropriate valve connection method and standard. inquiry@covna-china.com