Pinch valve, chance of cold welding silicone tube

In summary, the conversation discussed the risk of silicone tube cold welding when used with a solenoid pinch valve. The concern was whether the pressure at the pinch point, which is just enough to stop low pressure fluid flow, could cause cold welding over time. The group also discussed the potential consequences of cold welding and possible solutions to avoid it. One member mentioned the possibility of an overly strong pinch causing cold welding. Additional information or updates were requested.
  • #1
oemmake
7
0
Hi everyone,

In a current project, I'm curious about the risk of silicone tube cold welding when used with a solenoid pinch valve, such as = http://cfnewsads.thomasnet.com/images/large/454/454667.jpg

What is the likelihood silicone tube will cold weld at the pinch point, if the pressure is just enough to stop low pressure fluid flow (water), and, if pinched for several months. What are the chances of the pinched area, cold welding? If cold welding is a risk, what can be done to avoid it?

I assumed that an overly strong pinch might cold weld silicone together.

many thanks / simon
 
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  • #2
I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 

1. What is a pinch valve?

A pinch valve is a type of valve that uses a pinching mechanism to control the flow of a fluid through a tube. It is commonly used in industrial and scientific applications.

2. How does a pinch valve work?

A pinch valve works by physically pinching or squeezing a flexible tube to control the flow of a fluid. This is typically done by using a mechanical or pneumatic mechanism to apply pressure to the tube.

3. What is "cold welding" in relation to silicone tubes?

Cold welding is a process in which two metal surfaces are joined together without the use of heat. In the case of silicone tubes, it refers to the bonding of two silicone surfaces without the use of adhesives or heat treatments.

4. Why is there a chance of cold welding with silicone tubes in a pinch valve?

Silicone is a material that has a high surface energy, meaning it tends to bond easily with other silicone surfaces. In a pinch valve, the constant pinching action on the silicone tube can create enough pressure for the surfaces to bond together, resulting in cold welding.

5. How can the chance of cold welding in a pinch valve be reduced?

To reduce the chance of cold welding in a pinch valve, it is important to choose a pinch valve with a design that minimizes the pressure on the tube. This can include using a valve with a larger diameter tube or using materials that have a lower surface energy than silicone. Additionally, regularly cleaning and inspecting the valve can help prevent any potential cold welding from occurring.

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