EN
Any enclosed electronic device is constantly subjected to changes in internal pressure. From temperature changes in battery during transport to pressure created by gas release within battery pack, sudden surge in pressure can have devastating effects. Sealed enclosures not capable of equalization of pressure may fail seal, have lenses cracked or even violently burst. A pressure relief device also called an explosion proof valve or waterproof breathable valve is an elegant solution to this challenge. PUW is national high-tech company established in 2010, focusing on R&D, manufacture and sales of such key components. PUW has two main production bases covering around 40,000 square meters in both Jiangxi and Guangdong provinces, four service centers in both China and Germany, and 22 production lines, providing customized and precision engineered solutions all over world. In this article, you will learn about pressure relief devices and why they are necessary for safety of sensitive equipment.
Understanding the Problem of Enclosure Overpressure
Pressure differences occur in all covered spaces. An increase in internal temperature causes air to expand. As external temperature decreases or altitude rises, external pressure decreases. If no means to compensate for these differences is provided, pressure is created against sealing and housing walls. Thermal runaway may result in fast release of gas in battery packs, leading to high pressure in pack in just few milliseconds. This can lead to enclosure being broken, parts inside being damaged or safety risk to person using machine. Earlier solutions such as fully sealed housing or just plain vent are unsuccessful due to either being unable to release pressure or letting water and dust in. PUW’s products are designed to help battery packs comply with strict safety standards by providing protection levels such as IP68, rapid pressure venting, and more.
The Core Mechanism of a Pressure Relief Device
Pressure relief device opens as one-way or two-way valve on attaining a specific pressure inside the enclosure. During low pressure conditions or standard operating conditions, the pressure relief device would remains as seal in order to store environment in subjugation. Once the pressure risen out of set point it would opened for release of water. The pressure relief device automatically seals to equalize when the pressure inside reaches the same pressure. PUW's explosion proof valve waterproof breathable is achieved using precisely processed membrane and mechanical structure of the waterproof breathable membrane allows diffusing gas molecules while preventing the permeating of solid dust particles and water molecules. It means that the enclosure can be vented and no damage is done to the IP rating. Battery packs vent quickly to release gases as part of a fault condition without failure of the battery housing.
Why IP68 Protection Matters for Pressure Relief
IP68 is one of highest ingress protection ratings, indicating complete dust resistance and protection against prolonged immersion in water. Achieving IP68 while allowing pressure equalization actually seems contradictory, but PUW's technology makes it possible. The waterproof breathable membrane is made of advanced material with micron holes. These pores are so small that they allow air but not water molecules to enter. Consequently, enclosure is always pressurized while at same time being sealed against liquids. This is actually important for outdoor LED lighting fixtures, sensors, control boxes and telecommunication equipment that are exposed to rain, splashes, or temporary submersion. Each product is backed by dedicated research and development team and over 200 patents and has been tested to meet strict performance standards at PUW's CNAS certified laboratory.
Applications Across Industries
PUW's pressure relief devices actually serve remarkably broad range of sectors. In battery packs, they actually prevent overpressure during thermal events. They are used in automotive electronics to prevent pressure changes such as, due to temperature change that affect control units. They are used to resist pressure and prevent water from entering solar energy systems and in outdoor electronic equipment. Reliable pressure equalization is provided to variety of uses including household electronics, portable electronics, tools, disk drive filters and pharmaceuticals. Same applies to medical and pharmaceutical packaging, where waterproof breathable membranes are used as sterile barrier and gas barrier materials at same time. PUW is certified company with ISO 9001, IATF 16949 and ISO 14001 certifications which guarantees consistency of quality in all applications. The company has actually established deep collaborations with many world-renowned enterprises, solidifying its reputation as trusted partner.
Ensuring Timely Delivery and Customer Satisfaction
A pressure relief device actually is of little use if it does not arrive on time and performs as promised. PUW, with its flexible supply chain, smart inventory management and professional customer service team, actually ensures its customers of timely delivery and total satisfaction. The company holds 2 major production bases and 22 production lines which can be rapidly expanded to achieve worldwide coverage and mass production. PUW not only can provide explosion proof breather valve and waterproof breathable valve with standard or customized shape for any enclosures, but also can realize the precise design according to the shape of each customer's enclosure. The company operates 4 service centers in China and Germany, providing local service, technical advice and after-sales support in terms of those manufacturers from automotive electronics, outdoor lighting, battery production, and so on.
Conclusion
Enclosure overpressure is silent threat that can destroy equipment, compromise safety, and cause costly downtime. A pressure relief device from PUW solves this problem by combining rapid pressure venting with IP68 waterproof protection. Advanced waterproof breathable membranes, explosion proof and waterproof breathable valves ensure battery packs, sensors, outdoor LED lighting fixtures, control boxes, solar energy systems and variety of other products work safely in harsh conditions. PUW is leader in explosion proof valve industry with over 200 patents, CNAS certified laboratory, and international quality management certification. PUW provides expertise, capacity and support across world to deliver precision solutions on time and at scale for engineers and manufacturers that need reliable pressure equalization.
