The Sulzer API 610 OH1 pump is a single-stage, horizontal, foot mounted cantilever centrifugal pump designed strictly in accordance with the API 610 (ISO 13709) standard. It is an economical choice for transporting clean or slightly corrosive media in process industries such as petroleum and chemical.

Here are its detailed structural characteristics and application industries:

🛠️  structural characteristics
Compared with the more common OH2 type (centerline support) in the same series, the biggest structural feature of the OH1 type is its pump body support method, which directly determines its application scenarios and performance boundaries.

Characteristics and Description of Structural Components Data/Performance Performance
Support method: Foot support: The pump's feet are cast as one with the pump body and installed on the base. This is the core feature that distinguishes OH1 from OH2, with a simple structure but lower neutral stability at high temperatures compared to OH2 supported by the centerline. The design pressure is generally ≤ 2.5MPa, and the temperature range is -80 ℃~+300 ℃.
The pump body is radially divided and volute shaped, with an axial suction port and a vertical upward discharge port. This design is convenient for pipeline layout and maintenance. The caliber can reach DN 400, the flow rate can reach 2600 m ³/h, and the head can reach 250 meters.
Single stage radial impeller, usually a closed structure, with balance holes or back blades to balance axial forces.     -
The standard configuration of shaft seals can be matched with pipeline systems according to API specifications, and can be equipped with packing seals or single/double end containerized mechanical seals, and can be matched with auxiliary systems such as cooling and flushing.     -
Bearing housings are usually lubricated with oil, and some designs may have heat sinks to assist in cooling.     -
When viewed from the motor end, the pump rotates clockwise.     -
🏭  Application Industry
Due to its simple structure, easy maintenance, and relatively low cost, OH1 pump is widely used in various industrial processes with less stringent requirements. The main markets include:

Refinery: Used for transporting various types of oil products and process fluids.

Petrochemical plant: processes various chemical raw materials and intermediate products.

Ordinary industrial process: meets the transportation needs of general industries.

Coal chemical and low-temperature engineering: suitable for medium transportation under specific process conditions.

Water supply and treatment: used for water supply, circulating water and other systems in the factory area.

Desalination of seawater: used as a feed water or transport pump for processes such as reverse osmosis.

Pipeline pressurization: It plays a role in transportation and pressurization of pipelines in the factory area.

Offshore oil and gas production: applied to the upper process modules of offshore platforms such as FPSOs (Floating Production Storage and Offloading Units).

⚠️  Key differences from OH2 pump
When selecting, you need to pay attention to a key difference between OH1 and the more common OH2 type pumps. According to the definition of API 610, OH1 pumps cannot fully meet the stringent requirements for high temperature and high pressure conditions in the API 610 standard. Its structure and application requirements are actually closer to ANSI (American National Standards Institute) standard pumps, mainly used in relatively mild applications such as general refining services.

The OH2 pump adopts centerline support, and the pump body can maintain neutrality with the pipeline when heated and expanded, making it suitable for harsh working conditions with higher temperatures and pressures. Simply put, OH1 is an economical and practical entry-level choice, while OH2 is the "standard answer" for dealing with harsh working conditions such as high temperature and high pressure.

Are you comparing the selection options of OH1 and OH2, or would you like to know the detailed parameters of Sulzer's corresponding OH1 model (such as ZA model)? Tell me your specific needs, and I will further refine them for you.
FUCHS API610 OH1 pump structural characteristics and application industries
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As a global leader in the pump industry, Flowserve's API 610 OH1 pump is designed to follow the same API standards as similar products from Sulzer. Therefore, the core idea is consistent: both are single-stage cantilever pumps with bottom support, mainly used for relatively mild working conditions.

However, Volkswagen will have its own engineering characteristics in specific structural implementation and application coverage. Volkswagen's OH1 pump typically corresponds to its ANSI/ISO process pump series (such as Mark 3) ™ Etc.). Here is a detailed analysis:

🛠️  Structural characteristics of Volkswagen OH1 pump
Volkswagen's OH1 pump strictly follows the definition of OH1 type in API 610 in terms of structure, and reflects its brand characteristics in some details:

Characteristics and Description of Structural Components
Support method: Foot support: The pump's feet are cast as one with the pump body and installed on the base. This is the core definition of OH1, which differs from the centerline support of OH2.
The pump body is radially divided and volute shaped, with axial suction and radial discharge (usually top out). This design facilitates pipeline connection and maintenance.
The bearing box is integrated with the pump body or uses a separate bearing bracket to withstand radial and axial loads. Volkswagen's designs typically focus on the ease of maintenance of bearings and the reliability of lubrication systems.
The impeller adopts a single-stage radial impeller, usually a closed structure, and is equipped with balance holes or back blades to balance axial forces. Volkswagen excels in efficient and anti cavitation impeller hydraulic design.
The shaft seal can be configured with a containerized mechanical seal according to the API 682 standard, and equipped with auxiliary systems such as flushing and cooling to meet the sealing requirements of different media.
Materials and cooling can be selected according to different material combinations and cooling schemes based on the temperature of the medium. In some high-temperature applications, the pump cover can be equipped with a cooling water jacket.
🏭  Application industry of Volkswagen OH1 pump
With its mature design and wide performance coverage, the Volkswagen OH1 pump is widely used in various process industries, mainly for treating corrosive media with clean or slightly impurities. Common areas include:

Refinery: used for transporting light oil products and process fluids such as gasoline, diesel, and naphtha.

Petrochemical plant: processes various chemical raw materials and intermediate products such as alcohols, ketones, acids, and bases.

Coal chemical industry: used for transporting media such as methanol and process water.

Chemical industry: As a universal chemical process pump, it is widely used for the transportation of various acid-base salt solutions.

Natural gas processing: used for the medium transportation of amine liquid, ethylene glycol and other processing units.

Desalination of seawater: used for water supply or transportation in reverse osmosis processes.

Paper and pulp industry: used for conveying various process fluids.

General industry: including fields such as electricity (such as boiler feedwater pretreatment), district heating, water treatment, etc.

💎  summary
Overall, Volkswagen and Sulzer, as mentioned in the previous round, have highly consistent OH1 pumps that comply with the API 610 standard, with common features such as OH1 type foot support and single-stage cantilever. The differences are mainly reflected in the internal design details, hydraulic models, and specific model options of each company to meet the preferences and specific process requirements of different users.

If you are conducting specific project selection, I need to help you compare the specific models of OH1 corresponding to Volkswagen and Sulzer (such as Volkswagen's Mark 3) ™ Are there any differences in parameters or configurations between the ZA series and Sulzer?