water quality and water pressure requirment when using the Eyewash station, emergency eyewash shower and eyewash station
Because eyewash products are emergency ambulance safety products, only when chemical substances are splashed on the eyes, face or other parts of the staff, the eye wash is used for large water flushing, so the eye wash is not used frequently. of.
If the eyewash is not used for a long time, the water quality of the water stored in the eye washer will change. The use of the degraded water source will not only serve as an emergency rescue, but also may cause secondary damage to the wound, which will not be safe. The role of protection will also cause harm to the operator. According to the US ANSI Z358.1-2014 eyewash standard, the water source of the eyewash should be drinking tap water, in line with national drinking water standards. The eye wash in the long-term use, deterioration of water bound to happen, so we recommend, eye wash water inside Updated: 7-10 days / times. Whether it is a vertical eye wash, a shower eye wash or other eye wash, you need to change the water source regularly to ensure the safe use of the eye wash.
The water source pressure of the eye wash device is an important condition for ensuring the water flow and effect of the eye wash portion and the spray portion of the eye wash device . If the water source pressure is too small, the water supply of the eye wash device is insufficient, and the water source pressure is too large to damage the user, then the eye wash device in the United States How is the standard specified?
In the United States eyewash standard, the eyewash water flow is specified: >1.5L/MIN, eye wash/p>washing water flow:>11.4L/MIN, the eye wash water must be low enough to ensure no harm to the user; spray water flow: >75.7L/MIN, the spray water diameter should not be less than 508mm at a distance of 1524mm from the ground.
The above technical description of the eye wash does not mention the water supply pressure of the eye wash device, but only the water pressure of the eye wash device is regulated under the premise of ensuring the water flow rate of the eye wash device, that is to say, under the water source pressure of 0.2 MPa, The eyewash flow, spray water flow, and colleagues’ use of eye wash and spray water flow, as well as the relevant effects, must be met.
In fact, in many cases, the eye wash device satisfies the water source pressure. However, under special circumstances, when the water source pressure is lower than 0.2Mpa, there will be insufficient eye wash and spray water flow, and it is necessary to change this state. Increase the water supply pressure of the eye washer, but this method is to increase the cost.
Eyewasher to ensure water quality:
1. A timing drain is placed on the eye washer, and the timing drain is drained regularly every day.
2. Set a manual drain on the eye washer, drained by manual timing.
The effect of water flow pressure on the eye wash:
a. The water source pressure is too high or too low.
b. The spray water flow requirement is met, and the eye wash water flow is too large.
c. Meet the water pressure requirements, but not the water flow requirements.