What Are the Advantages of cast steel wafer check valve？

A wafer check valve is an excellent choice for applications where water hammer, mounting space and flow restriction are issues.

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A wafer check is designed to be “sandwiched” inline between two pipe flanges in the piping system, adding very little additional weight or bulk to the piping layout. Wafer checks overall tend to be stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves and are easier to install between standard gasket and line flanges.

Along with being lighter, easier to install and store, wafer check valves also offer the following advantages:

1. Disc travel is short with less impact force caused by valve closing.
2. The disc closes quickly with less water hammer pressure. Water hammer pressure is only 1/2 to 1/5 times of flange type swing check valve and flange type lift check valve.
3. Low flow resistance.
4. Horizontal and vertical installation available.
5. Very low opening (cracking) pressure differential.
6. More reliable due to lower impact forces, less water hammer.

Wafer check valves are available in many sizes, typically from 2” to 72”, in ASME pressure classes 125 through 2500 and API 6A and 6D pressure classes. DIN, JIS, BS, AS, and ISO standards are also available. Body styles include wafer, lug, double flanged and extended body. Wafer check configurations are available in retainer-less style, wafer, extended body wafer and lined. Typical body materials are cast iron, ductile iron, WCB cast steel, 316 stainless steel and other alloys. Common seating materials are EPDM, Buna-N, Neoprene, Refrigeration-grade elastomer, and Viton. The most common end connections are raised face, plain face, ring joint, weld-end, as well as hub-end.

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Check valves ensure one-way flow of fluids while preventing backflow, hence, play a crucial role in numerous industries, such as oil and gas, water and wastewater, chemical processes, heating, ventilation, and air conditioning, petrochemical industry, power generation, marine and shipbuilding and so on. Among these industries, swing check valves and wafer check valves stand out as popular choices, each with its own set of features and advantages. In this article, TIANYU VALVE will take through the difference between swing check valve and wafer check valve.

Quick View of What Includes in This Article

1. Introduction Of Swing Check Valves and Wafer Check Valves

• What is a Swing Check Valve? Definition and design
• Working principle
• What is a Wafer Check Valve? Definition and design
• Working principle
• Key Differences between Swing Check Valve and Wafer Check Valve Size and Weight
• Installation process
• Flow characteristics
• Performance in different applications
• Pros and Cons of Swing Check Valves Advantages
• Disadvantages
• Pros and Cons of Wafer Check Valves Advantages
• Disadvantages

2. Application Areas of Swing Check Valves

3. Application Areas of Wafer Check Valves

• Factors to Consider When Choosing Between Swing Check Valve and Wafer Check ValvePressure rating
• Material compatibility
• Maintenance requirements
• Cost-effectiveness

4. Conclusion

Introduction Of Swing Check Valves and Wafer Check Valves

What is a Swing Check Valve?

A swing check valve is a type of check valve featuring a hinged disc or flap. This valve is commonly installed between two pipe flanges and operates on the principle of swing motion to regulate fluid flow.

Design and Working Principle

Swing check valves consist of a body chamber housing a hinged disc. When fluid flows forward, the pressure of the fluid opens disc, allowing smooth flow. And when the fluid reverses its flow, the disc swings shut, effectively preventing backflow.

What is a Wafer Check Valve?

A wafer check valve, in contrast, is designed to fit between two flanges in a pipeline. Characterized by its slim profile and lightweight construction, this valve is suitable for applications with space or weight limitations

Design and Working Principle

Wafer check valves typically feature a thin, disk-shaped body with an internal flap or disc. When fluid flows in the forward direction, the disc opens, allowing passage. However, under reverse flow conditions, the disc closes to prevent backflow.

Key Differences between Swing Check Valve and Wafer Check Valve

When deciding between swing check valves and wafer check valves, several factors come into play:

Size and Weight

Wafer check valves are generally smaller and lighter than swing check valves, making them ideal for space-constrained applications.

Installation Process

Wafer check valves offer a simpler installation process due to their design, whereas swing check valves require bolting between flanges, which can be more complex.

Flow Characteristics

Swing check valves may cause more pressure drop due to their swinging motion, whereas wafer check valves offer minimal resistance to flow.

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Swing check valves provide a tighter seal and are suitable for high-pressure applications, while wafer check valves are more commonly used in high-flow applications.

Pros and Cons of Swing Check Valves

Advantages

• Provides a tight seal
• Suitable for high-pressure applications
• Durable construction

Disadvantages

• Larger and heavier
• More complex installation process
• Higher pressure drop

Pros and Cons of Wafer Check Valves

• Compact design
• Lightweight
• Suitable for high-flow applications

Disadvantages

• May not provide a tight seal
• Limited pressure rating

Application Areas of Swing Check Valve

Swing check valves find applications in various industries, including:

• Wastewater treatment plants
• Wastewater treatment plants
• Oil and gas pipelines
• Chemical processing plants

Application Areas of Wafer Check Valves

Wafer check valves are commonly used in:

• HVAC system
• Wastewater treatment plants
• Irrigation system
• Petrochemical industry

Factors to Consider When Choosing Between Swing Check Valve and Wafer Check Valve

Consider the following factors when selecting between these two types of check valves:

Pressure Rating

Evaluate the pressure rating required for your application and choose a valve accordingly.

Material Compatibility

Ensure that the valve materials are compatible with the fluid being transported to prevent corrosion or contamination.

Maintenance Requirements

Consider the maintenance needs of the valve, including ease of access for inspection and repair

Cost-Effectiveness

Assess the initial and long-term operational costs of the valve to determine the most cost-effective option.

Conclusion

In conclusion, both swing check valves and wafer check valves serve critical roles in controlling fluid flow in various industries. While swing check valves offer a tighter seal and are suitable for high-pressure applications, wafer check valves are preferred for their compact design and suitability for high-flow applications. By considering factors such as space constraints, flow requirements, and maintenance considerations, engineers can select the most appropriate check valve for their specific needs.

FAQs

Are swing check valves suitable for high-flow applications?

– Swing check valves are typically used in applications where a tighter seal is required, such as high-pressure systems.

Can wafer check valves be installed vertically?

– Yes, wafer check valves can be installed both horizontally and vertically, depending on the application requirements.

Which type of check valve is more cost-effective?

– The cost-effectiveness of a check valve depends on various factors such as installation, maintenance, and operational costs.

Do swing check valves require regular maintenance?

– Like any mechanical component, swing check valves may require periodic maintenance to ensure optimal performance.

Can wafer check valves be used in corrosive environments?

– Wafer check valves can be manufactured using materials that resist corrosion, making them suitable for corrosive environments.

As a real deal industrial valves manufacturer and factory, TIANYU VALVE is always happy to answer industrial valve related questions. Feel free to contact us!

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