Self suction ability: When the suction conditions are insufficient, the medium can be sucked in from a position lower than the pump inlet without the need for a pre vacuum pump, and the self suction depth can reach 6 meters.
Sealing method: Optional API 685 magnetic coupling or API 682 series mechanical seal.
High temperature option: The NCG-S series can withstand temperatures up to+450 ° C. • Flow rate: 0.8-450 m ³/h
• Head: 3-132 meters
• Temperature: up to 450 ° C (NCG-S)
• Speed: 1450 or 2900 rpm

Nikkiso's canned motor pumps are characterized by their deep-rooted technological foundation as an industry pioneer and their extensive experience in handling extremely challenging conditions (such as high-temperature sulfur and strong acids). While Teikoku Pumps is known for its comprehensive and robust capabilities, Nikkiso is more representative in highly specialized, niche applications.

Nikkiso's canned motor pumps are characterized by their deep-rooted technological foundation as an industry pioneer and their extensive experience in handling extremely challenging conditions (such as high-temperature sulfur and strong acids). While Teikoku Pumps is known for its comprehensive and robust capabilities, Nikkiso is more representative in highly specialized, niche applications.

Core Characteristics: Technological Origins and High-End Applications

We can understand the characteristics of Nikkiso canned motor pumps from three aspects: technological origins, ability to handle extreme conditions, and market position.

Characteristics Dimensions | Core Characteristics | Brief Description and Technological Highlights

Technological Origins and Industry Position | Global Technological Pioneer Nikkiso Corporation is a globally recognized pioneer and leader in the canned motor pump field. Its profound technological foundation serves as a benchmark for the industry.

Patents and Innovation | As an industry pioneer, Nikkiso possesses numerous fundamental patents. Addressing the pain points of traditional canned motor pumps (such as bearing life and inability to transport liquids containing particulates), it has unique improved patented designs. For example, it uses oil-lubricated rolling bearings instead of traditional media-lubricated sliding bearings, significantly improving bearing life and reliability.

Extreme Operating Condition Capability: Demonstrates exceptional performance in extreme temperature environments, particularly with ultra-high/ultra-low temperature media. As early as 1998, there was a proven track record of successfully transporting liquid sulfur (sulfur-to-acid) using Nikkiso's high-melting-point canned pumps, proving its unique technology in handling high-temperature, easily solidifying media. It is equally capable of handling ultra-low temperature LNG and high-temperature heat transfer oils.

Special Chemical Media: Possesses an excellent reputation for transporting highly corrosive, extremely toxic, high-purity, or valuable chemicals, such as sulfuric acid and caprolactam, and is the designated choice for demanding conditions. Shanghai Nikkiso Canned Pumps Co., Ltd. has been selected as a winning or successful supplier in several large-scale national chemical projects (such as Shenhua Ningxia Coal-to-Oil and Fujian Gulei Ethylene Project), fully demonstrating the reliability and market acceptance of its products in core chemical plants.

High Pressure and High Temperature: Designed to withstand combinations of extremely high pressure and temperature, suitable for demanding processes such as hydrogenation and cracking.

Model
Bearing Support Method

Impeller Position

Features and Applications

OH1
Cantilever type, bearing located on the same side as the medium

Outside the bearing

Simple and compact structure, relatively weak rigidity, suitable for small, light-load applications.

OH2
Two-end support, bearing located outside the medium

Between the two bearings

Best rigidity, most widely used, suitable for most medium to large flow rates and medium to high head applications.

OH3
Cantilever type, independent bearing housing

Outside the bearing

Bearing housing is separate from the pump body and connected by a bracket. Strongest resistance to thermal deformation, designed specifically for high-temperature (>260°C) applications.

Top reflux pumps, side-stream extraction pumps.

Injection pumps for corrosion inhibitors, scale inhibitors, and other chemicals.

Petrochemical and Chemical Industries: Pumps for various process liquids: such as olefins, aromatics, solvents (benzene, toluene, xylene).

Circulation pumps, reflux pumps: in reactor and fractionation tower systems.

Warm water, cooling water, hot oil pumps.

Natural Gas Processing and Liquefied Natural Gas: Amine liquid circulation pumps (desulfurization and decarbonization units).

Ethylene glycol injection pumps (dehydration units).

Refrigerator pumps and output pumps in LNG plants (requires cryogenic materials). Upstream Oil and Gas Extraction: Crude oil export pumps, water injection pumps (when pressure is not extreme).

Polymer and surfactant transfer pumps.

Coal Chemical and Fertilizer: Various process water, solvent, and intermediate product transfer pumps.

V. Summary: The Core Value of OH2 Pumps

High Reliability: Strictly adhering to API 610 standards, its design, materials, and testing standards far exceed those of ordinary industrial pumps, ensuring at least 3 years of continuous operation.

Exceptional Maintainability: The rear-opening design is its core feature, minimizing mean time between repairs and significantly reducing maintenance costs over its lifespan.

Superior Rigidity: End-end support and centerline design ensure stable operation under various working conditions.

High Standardization: Globally unified interfaces and dimensions facilitate spare parts supply, technical service, and personnel training.

In short, when you need to select a single-stage pump for conveying most process media in refineries and chemical plants, except for those with extremely high pressure, ultra-high viscosity, or high solids content, the API 610 OH2 pump is the most reliable, economical, and foolproof standard answer, proven globally for decades. Other well-known and classic product series in this field include the Goulds 3700/3800 series, Flowserve Durco Mark III, Sulzer Z, and KSB RPH.