PRODUCTS CENTER
Malaysia API 610 OH2 Horizontal Single-Stage Centrifugal Pump
Product Description
OH2 pump is a horizontal single-stage overhung centrifugal pump fully compliant with API 610 12th edition (ISO 13709). It features an overhung impeller structure with a single suction design, horizontal foot-mounted pump casing, and separate bearing housing arranged on the rear side of the impeller. This type pump is the mainstream process pump for heavy-duty petroleum, chemical and power industries, engineered for continuous stable operation under severe temperature, pressure and corrosive medium working conditions. It adopts modular design for easy interchange of spare parts and standardized maintenance procedures.
Model Description
Example: COZ (III) 25-200C
COZ -- Petrochemical Process Pump
25 -- Discharge diameter (mm)
200 -- Nominal impeller diameter (mm)
C -- Code for impeller trimming, marked in sequence as A, B, C, etc.
Operating Parameter Range
- Flow rate: 5 ~ 2500 m³/h
- Head: 10 ~ 260 m
- Working pressure: Max 16.0 MPa
- Medium temperature: -80 ℃ ~ +450 ℃
- Rotation speed: 980 / 1480 / 2980 rpm
- Drive type: Standard IEC electric motor, optional steam turbine, hydraulic coupling
Application Scope
- Oil & Gas: Crude oil transportation, refinery process fluid circulation, condensate transfer, desalting water service
- Petrochemical & Chemical Plants: High-temperature medium delivery, solvent circulation, acid & alkaline liquid transfer, polymer processing
- Power Generation: Boiler auxiliary water, cooling water, condensate pump, flue gas desulfurization (FGD) system
- Coal Chemical & Fertilizer Plants: Process water, slurry transportation, ammonia and urea medium pumping
- Water Treatment & Desalination: High-pressure seawater feed, industrial wastewater circulation
Material Selection
Application Scenario | Pump Casing | Impeller | Shaft & Sleeve |
Clean water, low-temperature oil | Cast iron HT250 / WCB carbon steel | SS304 stainless steel | 4140 carbon steel + SS304 sleeve |
General crude oil, mild corrosive chemicals | WCB carbon steel | SS316L stainless steel | 4140 + SS316L sleeve |
Acidic, chloride-containing medium, seawater | CF8M (316) cast stainless steel | CF8M / Duplex 2205 | 2205 duplex stainless steel |
High-temperature hydrocarbon, high sulphur crude | A217 Gr.F5 / F9 heat-resistant steel | F5 / 321 stainless steel | Heat-resistant alloy steel |
Strong corrosive & abrasive slurry | CD4MCU super duplex stainless steel | CD4MCU / Alloy C276 | Alloy C276 |
A full range of corrosion-resistant materials are available, including 303, 305, 306, 307, 316, 316L, 904, 904L, 804, ECR alloy, NiCr alloy, Hastelloy, CD-4MnCu and titanium alloy, which can meet the requirements of all aforementioned media. Please provide detailed information of the conveyed medium when placing orders.
Structural Features
- Overhung Single-Stage Design Single impeller mounted on the cantilever end of the shaft, no bearing inside the pump casing. Bearings are isolated from process medium to avoid medium erosion and extend bearing service life.
- Horizontal Foot-Mounted Casing Radial split pump casing with heavy-duty support feet at the bottom, good rigidity to resist pipeline load and thermal deformation; top inlet / top outlet or side inlet / top outlet layout available for flexible pipeline arrangement.
- Modular Bearing Assembly Standardized cartridge bearing housing, equipped with heavy-duty rolling bearings, forced oil lubrication or grease lubrication optional. Bearing temperature monitoring, vibration sensor mounting interfaces reserved as standard.
- Multiple Mechanical Seal Configurations Supports all API standard seal flush plans (Plan 11, 13, 21, 23, 32, 52, 53A/B/C, 62). Single seal, double seal and tandem seal options for toxic, flammable, volatile media to eliminate leakage risk.
- Axial & Radial Thrust Optimization Back vane balance structure on impeller reduces axial thrust; thick casing wall and large-size shaft minimize radial deflection, ensuring long-term smooth operation under variable load.
- Easy Maintenance & Low Downtime Back pull-out design: All rotating components (impeller, shaft, mechanical seal, bearing assembly) can be removed backward without disconnecting inlet and outlet pipelines, greatly shortening overhaul time.
Full Compliance with API 610 Standard Standard configuration includes wear metal case, anti-spin device, drain & vent connections, casing corrosion allowance, auxiliary piping for cooling/flushing, lifting lugs for installation and maintenance.
Advantages Summary
- Strictly follows API 610 industrial heavy-duty standard for long-term continuous operation
- Wide range of material solutions for corrosive, high-temperature, abrasive media
- Back pull-out structure minimizes production downtime during maintenance
- Multiple seal flush plans for zero leakage of hazardous process fluids
- Modular spare parts design, low after-sales maintenance cost
- Complete monitoring interfaces for intelligent plant automatic control system integration
Hunan Sanchang Pump Co., Ltd.
| Email: | info@sanchangpump.net |
| Hotline: | +86 181 4266 2779 |
| +86 193 1300 1794 | |
| Mobile/Wechat/WhatsApp: | +86 181 4266 2779 |
| Address: | No.517,Xiangfu Road, Yuhua |
| District, Changsha City | |
| Hunan Province, P.R.C |
