WFB Series Seal-less Self-Priming Pump with Automatic Control

Product Features

1.Adopts patented multi-face labyrinth centrifugal sealing structure, eliminating conventional packing and mechanical seals to eradicate all leakage; an ideal replacement for long-shaft sump pumps, submersible pumps and submersible sewage pumps.

2.The sealing assembly operates friction-free, delivering service life over 10 times longer than standard pumps.

3.Gas-liquid separation structure combined with an electric air control valve eliminates siphon effect to ensure stable lifelong self‑priming after initial water filling.

4.Low vibration and low noise; no anchor bolts required for installation, enabling easy disassembly and flexible relocation.

5.Equipped with automatic high/low liquid level alarm, adaptable to fully automatic control systems.

6.Configuration options:

   A,Standard rectangular & conical types for general service;

   B,Explosion-proof version for flammable and explosive hazardous environments;

   C,Outdoor canopy type with rain & moisture protection for open-air installation;

D, Trolley-mounted design for free on-site shifting.

Main Application

Electronics, power generation, chemical, metallurgy, pharmaceutical, food processing, electroplating, environmental protection, fire service, municipal water treatment, defense industry, textile printing & dyeing, mineral processing and civil construction sectors.

Model Designation

For example:

Model: 2 G 40 WFB-A

2-Type Code

G-Material Code

40-Suction Diameter (mm)

WFB-Seal-less Self-Priming Pump

A-Performance Classification

Notes:

The numbers 1–7 in the Type Code column indicate the following:

Type 1: Rectangular

Type 2: Conical

Type 3: Explosion-Proof

Type 4: Outdoor

Type 5: Trolley-Mounted

Type 6: Freeze-Proof

Type 7: Multi-Stage

The letters in the Material Code column (T, G, PP, BXG) represent the following materials:

T: Cast Iron

G: Steel (Carbon Steel, Wear-Resistant Steel: JM3, JM6)

PP: Reinforced Polypropylene

BXG: Stainless Steel (321, 304, 316, 316L)

Structure Diagram