Commonly used are the so-called plug valves.
Plug Valves are quarter-turn valves used to control fluid flow through a pipe. A plug valve constricts flow using a ported plug that swivels in the flow stream to constrict or allow flow.
Watco Group team realized the need in a flow-reversal valve that didn’t have any cross-over and minimal additional pressure loss, so as to achieve full performance of the HE unit at minimal energy cost. So the swing box was invented.
Swing-Box Utility Model Patent Certificate was granted to WATCO Group for creating a valve without any cross-over and minimal additional pressure loss.
Name of Utility Model: Swing-Box Reversal Valve
Inventor: Henk Janssen
Utility Model Patent No.: ZL 2018 2 0362878.3
Filed: 16 March 2018
Patentee: WATCO Group Pte Ltd
Address: Tower 1 #44-02, 1Raffles Place, Singapore 048616
Grant Date: 19 October 2018
Grant No.: CN 207989804 U
“After preliminary examination of this utility model in accordance with the Patent Law of the People’s Republic of China, the department has decided to grant the patent for the utility model invention, to issue a certificate for the patent and to add it to the database of the Patent Register.
The utility model patent is enforceable from the grant date. The term of this patent is 10 (ten) years, starting from the day it was filed.”
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