1. Unique shaft seal design - built-in with Teflon Bellow Seal self-cooling design.
2. Self-priming design - self-suction is particularly strong and self-priming up to 20 ft, and has a check valve design to prevent liquid backflow in the pump.
3. Strong acid resistance, strong alkali resistance and strong corrosion resistance. The village has CFRPP, FRPP, CPVC and PVDF (Teflon).
4. The rear cover and the shaft seal cover are integrally designed to facilitate maintenance and assembly.
5. The bottom valve should be installed at the entrance to block the inhalation of foreign matter. The check valve should be installed at the exit to prevent the instantaneous return phenomenon during the shutdown, resulting in damage to the National Treasure Pump body and damage to the pump idling.
Model number (pump material)：
Number of poles：
A-with tongue check valve (input is higher than liquid level)
B-tonless check valve (inlet is lower than liquid level)
Circulation tube return：
C-addition of cooling circulation pipe circuit (airproof transformation)