Review on Closed valve UNIPUMP BCX-15 by Janis Endzelins ᠌

Bought 4 pcs. Two were put on compressed air of 7 atm - after 2 months one did not close after work, and the second stopped opening - the compressor eventually jammed due to overheating from prolonged operation. They began to find out the reason - the membranes stretched - they rearranged the membranes from new ones, lowered the pressure to 3 atm - 2 months and the same thing, they stretched. You can buy ERDM replacement membranes, for example, from valves of another brand, but this is a whole saga with payment by bank transfer, etc. and it’s not a fact that they will fit exactly in size. I do NOT recommend putting it in the air for sure. Never had this problem with other valve brands.