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The frame plates for type DOH pumps have replaceable wear-resistant metal liners, The impellers are made of wear-resistant metal. The frame plate liner and impeller for DOH pump are adoptable of hard metal only.

Bearing assembly use cylindrical structure, adjusting the space between impeller and front liner easily, being removed completely when being repaired. Bearing assembly use grease lubrication.

The shaft seal could use the packing seal, expeller seal and mechanical seal. The discharge branch can be positioned at intervals of 45degrees by request and oriented to any eight positionsto suit installations and applications.

Here are the drive types, such as V belt drive, gear reducer drive, fluid couping drive, and frequency conversion drive devices.

Wide performance, good NPSH and high effeciency. The pump of this type may be installed in multistage series to meet the delivery for long distance.

3/2C-DOH for example:

DOH -- Centrifugal slurry pump

C--Frame type
3 -- Suction diameter (inch)
2 -- Discharge diameter (inch)

Heavy duty base

- Heavy duty one piece frame with lifting points for easy maintenance

Heavy duty bearing assembly

- Easy to maintain cartridge style bearing assembly

- HTS (High Tensile Steel) shaft with small overhang reduces

deflection and prolongs bearing life

- Modern bearing seals for increased reliability

- Patented grease and oil flinger allows a simple choice of oil or grease lubrication

- Bearing assembly can be replaced in-situ

Single piece sleeves

- Single piece allows for easy maintenance and removal

- Sleeves are available in cermets or metal

- O-ring seals protect from abrasive/corrosive contaminants

Severe duty high efficiency impeller

- Improved hydraulics for higher efficiency

- Lower NPSHR and increased wear life

- Multi-purpose design allowing reduced inventory requirements

Mechanical seal (external flush)

Seal automatically adjusts water flush pressure which means high suction pressures can be accommodated for whilst remaining leak free

Liners

- Liners are bolted to allow for easy maintenance

- Elastomer seal rings back all liner joints

- Thick section volute liners and frame plate liner inserts for high efficiency

Features

1. Material

The wet parts material for standard DOH series pump is high-chrome alloy , this kind of matrial is wear resistant and has excellent performance under enrisive conditions.

Pump parts material

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