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1. Rapid Assembly: Socket Fusion Fittings utilize a hot-melt socket welding process. Welding is completed simply by inserting the pipe into the sleeve and heating for tens of seconds. The overall operation time is significantly shorter than the minutes or even hours required for traditional arc or gas welding. 2. Low O...
View More1. High Temperature Resistance Taking fluoroplastics (PTFE, FEP, PVDF, ETFE, PFA) as an example, their maximum operating temperature can reach 260℃, with a low temperature limit above -18℃. Conventional plastic piping (such as PPR and PVC) can be used stably for a long time below 90℃, but softening or even failure will...
View More1. Determine the Media Characteristics First, determine whether the medium being transported by the plastic pipe is water, oil, chemical solvents, or gas. Select materials based on its corrosiveness, viscosity, and temperature range. PPR is suitable for hot water, PVC for acid and alkali media, and PE-RT for low-temper...
View MoreWhat are Check Valves More?
1. Basic Concept
Check Valves More are one-way valves that automatically open when the system flows in the forward direction and automatically close when it flows in the reverse direction to prevent backflow.
2. Common Types
Lift Valve: Suitable for small-diameter, high-resistance applications.
Swing Valve: Suitable for large-diameter, low-resistance pipelines.
Butterfly Valve and Diaphragm Valve: Provide a more compact structure in specific processes.
4. Working Principle
When the upstream pressure is higher than the seat pressure, the valve disc is pushed open; when the downstream pressure exceeds the upstream pressure or the pressures on both sides are equal, a spring or gravity returns the valve disc to the seat, achieving unidirectional flow.
5. Role in Industry
Check valves are critical safety components in piping systems, widely used in demanding industries such as petrochemicals, pharmaceuticals, semiconductors, and photovoltaics, protecting equipment and ensuring process continuity.
How to prevent water hammer with Check Valves More?
1. Rapid Closure to Prevent Shock Waves: Employing spring-loaded or fast-response swing valves allows for rapid closure when fluid flow reverses instantaneously, reducing pressure peaks caused by sudden changes in flow velocity and thus suppressing water hammer.
2. Multi-Valve Series Design: Arranging two or three stages of check valves in critical sections creates graded damping. Slight differences in the closing pressure of each stage disperse shock energy across multiple valves, reducing the impact load on individual valves.
3. Low-Resistance Valve Body Selection: Using swing valves or riser valves with low flow resistance and low opening resistance maintains a low pressure drop under normal operating conditions, avoiding additional pressure fluctuations caused by the valve body itself.
4. Utilizing Pressure Regulating Valves: Installing a pressure regulating valve or buffer tank upstream of the check valve provides sufficient buffer volume in the event of a sudden system shutdown, further mitigating the water hammer effect.
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