Technical issues with water pressure in eye washers

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The issue of water pressure for eyewash stations is mentioned in the data sheets or MR documents provided by the design institute. The water pressure for eye washers includes: design pressure, test pressure, and operating pressure. 1. Design pressure: It is the water pressure value that the designed eye washer must meet. 2. Test pressure: It is the value used when testing the water pressure of an eye washer. These two pressure values are relevant to the manufacturing of eye washers, whereas the operating pressure relates to the use of the eye washer; there are no strict technical requirements for this value – it only needs to ensure an appropriate flow rate and effectiveness of the water used for spraying or rinsing. However, it is necessary to inform the eye washer manufacturer of the gauge pressure at the water inlet of each eye washer (i.e., the water pressure used when operating the eye washer). The water pressure values specified in the data sheets by many design institutes, ranging from 0.2 to 0.4 MPa, are actually unnecessary; it is necessary to enter the values based on the actual water pressure. We recommend that, in the data sheet for eye wash stations, the water pressure range for such stations be set at 0.1~0.6 MPa; this will allow for a more flexible setting of the water supply pressure for eye wash stations.