Utility Model Patent Certificate for Eqobrush Swing-Box Reversal Valve Invention Granted to WATCO Group


EQOBRUSH, Automatic tube cleaning system for Shell and Tube Heat Exchangers such as chiller or power plant condensers or industrial heat exchangers (all will be included in the acronym HE for Heat Exchanger), needs a reversal valve to reverse the water flow to HE on a regular basis.

Why Plug Valves Needed Improvement

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.

Shortcomings of Plug Valves

Water Leakage / Cross-Over

Usually PlugValves come with a design shortcoming of water leakage from cold water into the hot water stream. This is caused by the pressure difference in the 2 sides of the valve. The result of this water leakage or water bypass (which we refer to as cross-over) is that the HE receives less cold water and it reduces the cooling capacity of the HE.

High Pressure Drop

The plug valves also cause a high pressure drop over the valve due to complicated water flow inside the valve.

Swing-Box Reversal Valve Utility Model Invention Certificate

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.

Eqobrush reversal valve patent certificate

Utility Model Patent Certificate

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.”

Advantages of swing box reversal valve

Reasonable structure and reasonable manufacturing cost

Bypass zero leakage

The swing box mechanism runs on the inner side of valve’s cover which has excellent sealing conditions with sealing material (Teflon), that allows the system operate with longer lifespan.

Easy Installation and retrofit

The valve body has a compact axial dimension and low requirement of the installation space. Easy to retrofit in most of the piping layout.

Variety of connections to meet the needs of various installations

EqoBrush Automatic Tube Cleaning Brushing System For Heat Exchanger

Eqobrush Automatic Brush Tube Cleaning System

WATCO Group PTE ltd.

Automatic On-line Brush Tube Cleaning Systems for Heat Exchangers and Chiller Condensers have proven their effectiveness on efficiency and energy saving in industry and comfort cooling (HVAC). 
Learn more about the benefits and advantages.