Renroc Group - Pumps and Engineering :: Specialsing in API 610 and API 685 Standards

Pump Image: 

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High-speed integral gear-driven single-stage overhung pumps are referred to as OH 6 type pumps. These pumps have a speed increasing gearbox integral with the pump. The impeller is mounted directly to the gearbox output shaft.

There is no coupling between the gearbox and pump; however, the gearbox is flexibly coupled to its driver. The pumps may be oriented vertically or horizontally.

Pump Image: 

oh5.png

Close-coupled vertical in-line single-stage overhung pumps shall be designated pump type OH 5.

Close-coupled pumps have their impellers mounted directly on the driver shaft. (This type does not meet all the requirements of International Standard).

Pump Image: 

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Rigidly coupled vertical in-line single-stage overhung pumps shall be designated pump type OH 4.

Rigidly coupled pumps have their shaft rigidly coupled to the driver shaft. (This type does not meet all the requirements of International Standard).

Pump Image: 

oh3.png

Vertical in-line single-stage overhung pumps with separate bearing brackets are referred to as OH 3 type pumps.

They have a bearing housing integral with the pump to absorb all pump loads. The driver is mounted on a support integral to the pump. The pumps and their drivers are flexibly coupled.

Pump Image: 

oh2.png

Centreline-mounted single-stage overhung pumps are referred to as OH 2 type pumps. They have a single bearing housing to absorb all forces imposed upon the pump shaft and maintain rotor position during operation.

The pumps are mounted on a baseplate and are flexibly coupled to their drivers.

Pump Image: 

oh1.jpg

Foot-mounted single-stage overhung pumps are referred to as OH 1 type pumps. (This type meets all requirements of the International Standard for ANSI and ISO).