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China Suppliers D71X Stainless Steel PTFE Seat Wafer Butterfly Valve Factory - Size DN40-DN600, Pressure PN6-PN16
Valve Type: |
Wafer butterfly valve |
Structure: |
Concentric |
Standard: |
EN593 |
Workmanship: |
Investment casting |
Sealing direction: |
Bidirectional |
Sealing grade: |
Zero leakage |
Temperature: |
-20°C < T < 120°C |
Operation: |
Handle/Lever |
Characteristics
Four stage sealing structure is adopted, and the sealing surface is equipped with temperature resistant and anti-aging silicone rubber elastic gasket valve seat, which can completely achieve zero leakage of media. For example, the special transition curve at the connection between the shaft head and the butterfly plate circumference and the reasonable interference fit of the valve seat, as well as the use of elastic O-rings and rigid gaskets and elastic rubber pads at the shaft shoulder end face of the shaft head, all contribute to improving the sealing performance.
Advantages
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🧪Chemical Resistance
PTFE hardly reacts with most chemicals and can resist corrosion from strong acids, bases, and organic solvents. Only molten alkali metals and certain fluorides can degrade it at high temperatures.
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🌡️Temperature Range
It can operate continuously at temperatures ranging from -10°C to 180°C, with a maximum short-term tolerance temperature of approximately 290°C–320°C.
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⚙️Low Friction
The friction coefficient is as low as 0.02–0.10, which can reduce the wear of moving parts and prevent the medium from adhering to the valve.
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🛡️Non Reactive
PTFE does not absorb water or gas, and can remain stable and uncontaminated in humid environments.
Packing
Standard export wooden case packaging
Application Scenarios
Within the chemical industry, it serves as a standard component for production lines processing aggressive media such as sulfuric acid and chlor-alkali products. In the pharmaceutical sector, its GMP-compliant hygienic design renders it ideal for sterile medium transfer systems. For power plant flue gas desulfurization (FGD) systems, it also provides an effective solution to mitigate valve erosion and wear caused by limestone slurry.
Frequently Asked Questions
Q
What type of sealing structure does this wafer butterfly valve use?
This valve adopts a four-stage sealing structure. The sealing surface is equipped with a temperature-resistant and anti-aging silicone rubber elastic gasket valve seat, enabling complete zero leakage of media. Elastic O-rings, rigid gaskets, and elastic rubber pads are also used at the shaft shoulder end face to further enhance sealing performance.
Q
What is the operating temperature range of this butterfly valve?
The valve operates within a temperature range of -20°C to 120°C under standard conditions. The PTFE material used can continuously operate from -10°C to 180°C, with a short-term maximum tolerance of approximately 290°C–320°C.
Q
What are the main chemical resistance properties of the PTFE seat material?
PTFE barely reacts with most chemicals and effectively resists corrosion from strong acids, strong bases, and organic solvents. Only molten alkali metals and specific fluorides at high temperatures can degrade the material, making it highly suitable for aggressive media environments.
Q
What industries and applications is this wafer butterfly valve suitable for?
This valve is widely used in the chemical industry for processing aggressive media such as sulfuric acid and chlor-alkali products. It is also suitable for pharmaceutical sterile medium transfer systems due to its GMP-compliant hygienic design, as well as power plant flue gas desulfurization (FGD) systems where limestone slurry erosion is a concern.
Q
How is the valve operated and what standard does it comply with?
The valve is operated via a handle or lever and complies with the EN593 standard. It features a concentric structure manufactured through investment casting, ensuring precision and consistent quality in every unit produced.
Q
What packaging is used for export shipment of this butterfly valve?
The butterfly valve is packaged in standard export wooden cases, designed to protect the product during international transportation and ensure it arrives in perfect condition at its destination.