Product Overview

The UPVC bottom valve is a one-way valve installed at the bottom end of the water pump suction pipe. It is mainly made of UPVC (high-density polyvinyl chloride) material and has both the closing function of a valve and the one-way check function. It is used to prevent liquid backflow and ensure that the pipeline system remains filled with water when the pump is stopped, avoiding the "idle running" phenomenon. It is widely used in liquid transportation systems in industries such as chemical engineering, environmental protection, and water treatment.

Technical Specifications

Nominal diameter: DN20 - DN200 (1/2" - 8") 
Pressure rating: PN6 to PN10 
Temperature range: -10°C to +60°C 
Applicable media: Water, weak acids, weak bases, salt solutions and other corrosive liquids. 
Leakage level: ANSI Class IV or V 
Sealing material: EPDM, FKM or NBR 
Flange connection: Compliant with GB, ANSI or DIN standards 
Threaded connection: BSPT or NPT