Waterproof and breathable valve
The waterproof and breathable valve can achieve the seemingly
contradictory functions of waterproofing and ventilation, and
behind this lies its ingenious working principle. This principle is
based on the special physical properties of the breathable membrane
and the structural design of the entire valve.
The nanoscale microporous structure of the breathable membrane is
the key. Due to thermal motion, gas molecules are in a constant
state of random motion. The diameter of these molecules is much
smaller than the size of the micropores, and they have sufficient
kinetic energy. Therefore, they can easily pass through the
micropores, enabling gas exchange between the inside and outside of
the equipment and achieving the purpose of ventilation.
Liquid water molecules, however, are different. On the one hand,
there are strong hydrogen - bonding forces between water molecules,
causing them to tend to aggregate together to form larger clusters.
On the other hand, the size of these clusters is larger than the
micropores of the breathable membrane, preventing them from passing
through. In addition, surface tension also comes into play. When
water comes into contact with the breathable membrane, the surface
tension causes water to form droplets on the membrane surface,
further preventing water penetration and thus achieving the
waterproof function.
When the internal pressure of the equipment is higher than the
external pressure due to factors such as temperature increase or
chemical reactions, under the action of the pressure difference,
gas is discharged from the inside through the breathable valve
along the concentration gradient to balance the internal pressure.
Conversely, when the external pressure is higher than the internal
pressure, external gas will enter the inside. At the same time, the
outer shell of the waterproof and breathable valve protects the
breathable membrane, enabling it to work normally in harsh
environments. This clever design based on physical principles
enables the waterproof and breathable valve to reliably achieve the
dual functions of waterproofing and ventilation under various
complex conditions.
precision instruments
Product dimensions
| Air permeability | 10ml/min atp=1KPa |
| Water - blocking pressure | -120mbar(＞1M) |
| Operating Temperature | -50S℃～150℃ |
| Protection level | IP68 or IP67 |
FAQ
Q:Are you manufactory or trade company?
A:We are manufactory specialized in pratective vent and have the
direct price!
Q:What is the price?
A:Please leave your whatsapp or email address. We will send details
to you.
Q: Is there after-sales guarantee for the purchase of Xi 'an Hoan
Microwave Co.,LTD?
A:Yes, we provide perfect after-sales service, if you encounter any
problems in the process of use, you can contact us, there will be
professionals for you to solve.
Q:How do you ship the goods and how long does it take to arrive?
A:We usually ship by DHL, UPS, FedEx or TNT if sample. It usually
takes7-10 days to arrive. If big order will ship by sea.
