Discussion on filter pressure relief valves
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This post was last edited by tjhuan on 2021-9-9 19:31. Hello everyone, I have a few questions: 1. Is there an overflow hole on the first one on the left? (I can’t see it in this image.) 2. Have you seen water entering the overflow hole in the middle? Have there been any consequences? Thank you. 3. Has anyone taken any specific measures to protect this pressure relief valve?
This thing is meant for use, and it requires a certain level of cleanliness of the medium. In the event of internal leakage, external leakage, or ineffective adjustment, simply remove it, disassemble it, and replace the parts. For reference.
This post was last edited by ZhiGE on 2021-9-10 at 12:27. Let’s first explain the working principle of the pressure reducing valve as follows: 1. Is there an overflow hole on the first device on the left? (I can’t see it in this diagram.) By principle, exhaust vents must be present; they are just in locations that are more concealed or the holes are smaller. 2. Have you seen water entering the overflow hole in the middle? Have there been any consequences? Thank you. There is water ingress, as well as dust entry. As a result, in winter, when temperatures are low and the springs and diaphragms freeze, the pressure regulating valve loses its ability to regulate pressure; the supply pressure drops, and the valve stops functioning properly. 3. Has anyone taken any specific measures to protect this pressure relief valve? It has been done; the manufacturer provides protection, or it can be done by oneself, which can reduce failures. Additionally, when purchasing valves, pay attention to the technical requirements of the pressure reducing filter, such as CV, operating temperature, and protection rating. At the same time, minimize the number of brands and models in order to reduce spare parts.
I’ve learned something new. But for the pressure relief valve at the bottom, if it already has a gland for protection, then there’s no need to add an additional protective cover, right?
Looking at the diagram you provided, it’s also from SMC. Is it true that this brand is prone to water ingress, while such issues have not been observed much with other brands? Such as Nuoguan B74, FISHER 67D, etc.
This model of SMC is quite noticeable, while the others are not. Everything was done just in case.
1. Pay attention to the cleanliness of the air source and its moisture content; especially in winter when temperatures are low, special care must be taken regarding moisture levels. There have been instances on site where high moisture content in the compressed air caused the air tanks to get damaged. 2. During inspections, pay attention to the aging condition of non-metallic gas cylinders; special attention should be given to those used outdoors for more than five years. 3. Regularly inspect the exhaust valve for drainage, check for dirt and water accumulation inside the air chamber, and examine the pressure regulation performance.
I didn’t pay attention to these details; I’ll be more careful in the future