Product · PVPeW 2026

DF41X Low-Resistance Backflow Preventer

DF41X Low-Resistance Backflow Preventer — PVPeW 2026

Description

An integrated hydraulic backflow preventer that allows water to flow in one direction only. Flow through the inlet check valve loses head, keeping inlet pressure above the discharge-valve chamber pressure. If the differential falls below 0.02 MPa, the discharge valve opens, drains the reverse flow and admits air to create an air gap; above 0.02 MPa it closes again. It protects water supply networks from backflow contamination.

Technical Parameters

Model
DF41X
Function
Backflow prevention
Trigger Differential
0.02 MPa

PVPeW 2026 · The 21st Wenzhou International Pump, Valve and Pipe Exhibition · Archive of past editions · Wenzhou, China · All product categories