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What is the difference between API 610 OH2 and OH1 pumps? Comparison of structure, working conditions and selection

In petroleum refining, chemical industry and high-temperature fluid transportation projects, API 610 OH1 and OH2 are common single-stage cantilever centrifugal pumps. The main difference between the two is not the flow rate or head, but the support method of the pump casing and its impact on thermal expansion and shaft system alignment. When purchasing, if you only select a pump type based on flow, head and price, you may ignore the changes in shaft alignment, mechanical seal life and long-term maintenance costs during high-temperature operation. So how should we choose between OH1 and OH2?
2026-10-17
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How to calculate the flow rate and head of a centrifugal pump? Industrial Pump Selection Parameter Guide

For chemical transportation, petrochemical industry, industrial circulating water and high-temperature medium transportation systems, pump selection cannot only refer to pipe diameter or motor power, but also requires comprehensive calculations based on actual flow, system resistance, medium properties and operating conditions. This article introduces the calculation method of centrifugal pump flow and head, and explains how to determine the selection parameters of industrial pumps through engineering cases.
2026-10-16
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How to calculate NPSH for industrial pumps? Cavitation Headroom, Selection Methods and Engineering Application Guide

In the selection of industrial centrifugal pumps, flow rate and head are usually the first parameters that buyers pay attention to, but NPSH (Net Positive Suction Head) also determines whether the pump can operate stably. In petrochemical, high-temperature liquid transportation and low-level storage tank systems, if the suction inlet pressure is insufficient, the liquid may partially vaporize and cause cavitation, resulting in impeller damage, increased vibration, and reduced pump performance. Therefore, engineers need to calculate the system's available NPSH before purchasing and compare it with the performance data provided by the pump manufacturer.
2026-10-15
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How to design and select an industrial pump skid system? Key Parameters, Pump Configuration and Purchasing Guide

Reasonable pump skid design should start from process parameters and comprehensively consider system resistance, NPSH, equipment redundancy and operation and maintenance requirements to avoid increased energy consumption, vibration, leakage or shutdown due to unreasonable configuration.
2026-10-14
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What technical parameters need to be provided for pump inquiry? Industrial Pump Purchasing and Selection Guide

Industrial pump procurement should not only compare the price of a single piece of equipment, but also need to evaluate performance curves, material configurations, mechanical seals, testing requirements and subsequent maintenance costs. Buyers should request technical data sheets, performance curves, bill of materials, quotation ranges and delivery schedules from suppliers. For critical working conditions, test standards, inspection documents and spare parts supply also need to be confirmed.
2026-10-12
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Multistage centrifugal pump selection: number of stages, head, NPSH and power

In boiler water supply, petrochemical industry, high-pressure transportation and industrial boosting systems, multi-stage centrifugal pumps are often used in large lift and continuous operation conditions. When purchasing, if you select a model based only on flow and head, problems such as unreasonable number of stages, insufficient NPSH, small motor power, or low operating efficiency may easily occur.
2026-10-10
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What is the difference between chemical axial flow pumps and mixed flow pumps? Flow, lift and selection guide

In chemical production, axial flow pumps and mixed flow pumps are often used for large-flow liquid transportation, but there are obvious differences between the two in terms of impeller structure, lift range, operating characteristics and applicable working conditions. For evaporation crystallization, chemical circulation, cooling water transportation and low-lift process systems, choosing an inappropriate pump type may lead to insufficient flow, increased energy consumption, cavitation or equipment vibration. Therefore, engineers and buyers cannot select a pump type based solely on flow rate, but also need to comprehensively consider the system head, medium properties, operating mode and installation conditions.
2026-10-09
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How to select a forced circulation pump based on evaporation capacity and head?

In engineering projects such as chemical evaporation, wastewater treatment, salt production, and MVR evaporation systems, forced circulation pumps play an important role in promoting high-speed circulation of materials, preventing scaling of heat exchange surfaces, and improving evaporation efficiency. Therefore, reasonable matching based on evaporation volume and head is the key to ensuring long-term stable operation of the evaporation system.
2026-09-30
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Whether you are looking to purchase products or need professional advice from experts in Feiyue Pump Industry, we are more than happy to provide you with technical support for pump solutions! If you need assistance, please feel free to contact us at any time.