Media: | Water |
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Driving Mode: | Bare Stem |
Connection Form: | Wafer |
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Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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Payment Method: | |
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Initial Payment Full Payment |
Currency: | US$ |
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Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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The seat design of a wafer butterfly valve is an essential element that ensures proper sealing and functionality of the valve. Typically, wafer butterfly valves have a resilient seat, which means that the seat is made of a material that can deform slightly to provide a tight seal when the valve is closed. This material is often elastomeric, such as EPDM (ethylene propylene diene monomer) or NBR (nitrile butadiene rubber).
The seat is located around the perimeter of the valve's disc, where it makes contact with the valve body when the valve is closed. When the valve is in the closed position, the resilient seat compresses against the valve body, forming a seal to prevent leakage. This design allows the valve to achieve bubble-tight shut-off.
Additionally, some wafer butterfly valves may have a replaceable seat design, where the seat can be easily replaced if it becomes worn or damaged, extending the valve's service life.
The standard for wafer type butterfly valves can vary depending on factors such as the intended application, industry requirements, and geographical location. However, some common standards that are often referenced or adhered to in the design, manufacturing, and testing of wafer type butterfly valves include:
API (American Petroleum Institute) Standard 609: This standard covers the design, materials, testing, inspection, and marking requirements for butterfly valves used in industries such as petroleum, chemical, and natural gas.
ISO (International Organization for Standardization) Standard 5752: This standard specifies the face-to-face dimensions of wafer type butterfly valves for use in pipelines.
MSS (Manufacturers Standardization Society) SP-67: This standard covers the requirements for resilient-seated butterfly valves, including wafer type, lug type, and flanged-end type valves.
EN (European Norm) 593: This standard specifies the design, dimensions, and testing requirements for butterfly valves, including wafer type, for general industrial applications.
ASME (American Society of Mechanical Engineers) B16.34: This standard covers valves, including butterfly valves, for use in pressure piping applications.
These standards provide guidelines for manufacturers to ensure the quality, performance, and interchangeability of wafer type butterfly valves in various industries and applications. It's essential for manufacturers and users to verify which specific standards apply to their region and requirements.
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