Breather valves for storage tanks, types ZFQ and QZF
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I would like to ask: what is the difference between the QZF-89 type fire-resistant vent valve and the ZFQ-89 type flame-retardant vent valve? Under the same conditions of nominal diameter, material, and operating pressure
I can tell you with certainty that there is no difference, as ZFQ and QZF, or HXF and other models are all named by the respective manufacturers; from the perspective of the product itself, there is no difference – it’s just that the names vary