HW Mixed Flow Pumps

Structure and Function of HW Mixed Flow Pumps

Figure1 Construction Section of Model 100~350HW Mixed-flow Pumps

Figure2 Construction Section of Model 400~800HW Mixed-flow Pumps

The pump consists of a pump cover, impeller, volute casing, pump shaft, shaft sleeve, and bearing assembly (bearing body for diameters ≤350mm, bearing frame for diameters ≥400mm).

• Shaft Seal: Packing, gland and packing ring prevent air ingress and excessive leakage (excluding 100HW, 150HW, and 200HW models).

• Bearings: Single-row radial ball bearings lubricated via oil or grease.

• Clearance Adjustment: Impeller-to-cover gap is adjustable (0.3–0.7 mm) via paper shims to balance efficiency and avoid friction.

• Priming: Built-in screw hole on the casing for manual water filling or vacuum pump connection.

Transmission Options

• Direct or variable speed drive compatible with electric motors or diesel engines.

• Customers must specify power source type, power, and speed for correct coupling or pulley configuration.

Rotation Direction

• Standard: Counter-clockwise (viewed from the inlet).
  

• Exceptions: 650HW-5, -7, and -10 models rotate clockwise.

Model Numbering Example

• Example: 100-HW-8-S

• 100: Inlet/outlet diameter (mm)

• HW: Horizontal volute mixed-flow pump

• 8: Rated head (m)

• S: Design variant

Accessories (Optional)

• 150–300HW Models: Inlet/outlet elbows, foot valve, pulley or coupling.

• 400–650HW Models: Inlet/outlet elbows, check valve, pulley or coupling.

Technical Parameters of HW Mixed Flow Pumps

Quick Selection Chart