Jiangsu Haifa Machinery Manufacturing Co., Ltd.

 Product Name: API610 OH1 (OHF/OHC) Chemical Process Pump

 I. Product Overview

The API610 OH1 chemical process pump (corresponding to standard types OHF/OHC structure) manufactured by Jiangsu Haifa Machinery Manufacturing Co., Ltd. is a single-stage, overhung, foot-supported centrifugal pump. This series of pumps is fully designed and developed in accordance with the 11th edition of the American Petroleum Institute API610 standard, and is suitable for conveying high-temperature, high-pressure, flammable, explosive, and corrosive liquids in industries such as petroleum, chemical, coal chemical, power, and metallurgy.

The OH1 (OHF/OHC) pump features heavy-duty service, high reliability, and long life, and is one of the most widely used overhung pump types in petrochemical plants.

 II. Product Structural Features (OH1 Type)

The core structural features of the OH1 pump are:

Structural Item	Feature Description
Support Type	Centerline foot support, pump casing with feet, mounted on baseplate
Bearing Type	Radial + thrust bearing combination (oil or oil mist lubrication)
Seal Chamber	Compliant with API682, can be equipped with various mechanical seals and flushing plans
Impeller Type	Closed, back-open impeller, dynamic balance grade G2.5
Inlet/Outlet Orientation	Side inlet, top outlet (top inlet/top outlet optional)
Coupling Type	Diaphragm or pin-type flexible coupling

Difference between OHF and OHC:  
OHF: Pump casing with heavy-duty feet, suitable for higher temperatures (≤400℃)  
OHC: Pump casing with standard feet, suitable for normal conditions (≤200℃)

 III. Main Technical Parameters

Parameter	Range
Flow Rate	～2600 m³/h
Head	～250 m
Temperature Range	-40℃ ～ +400℃ (OHF up to 400℃, OHC up to 200℃)
Max. Working Pressure	2.5 MPa ～ 5.0 MPa (depending on casing class)
Rotational Speed	1450 / 2950 / 3550 rpm (VFD configurable upon request)
Efficiency	High-efficiency hydraulic model, efficiency 3~5% higher than GB standard
Material Class	S-1 / S-2 / S-3 / S-6 / C-6 / A-8, etc. (API610 standard)

 IV. Applicable Media

 Hydrocarbons, oils, liquefied gas
 Acids, alkalis, salt solutions
 Solvents, chemical intermediates
 High-temperature hot oil, low-temperature liquid nitrogen
 Media containing solids (wear-resistant structure optional)

 V. Design Standards and Codes

 Design Standard: API610 11th Edition / ISO13709
 Flange Standard: ASME B16.5 / HG/T20615
 Test Standard: API610 11th Edition (including performance test, cavitation test, mechanical running test)
 Balance Grade: ISO 19401 G2.5
 Vibration Standard: API610 Appendix M (≤3.0 mm/s)

 VI. Product Advantages (Jiangsu Haifa Proprietary)

1. High-Reliability Design  
    Optimized bearing span, 30% increase in rigidity  
    Enlarged shaft diameter reduces deflection  
    Replaceable wear ring design extends casing life

2. High-Efficiency Hydraulic Performance  
    Hydraulic model optimized using CFD flow field analysis  
    Efficiency superior to similar imported products, significant energy savings

3. Flexible Configuration  
    Supports multiple material combinations (duplex stainless steel, Hastelloy, titanium, etc.)  
    Sealing system configurable according to API682 Plans 11/21/31/52/53, etc.

4. Easy Maintenance  
    Back pull-out design allows rotor removal without disconnecting piping  
    Bearings, seals, and impeller can be quickly replaced

 VII. Typical Applications

 Refinery crude/vacuum distillation, FCC, hydroprocessing units
 Chemical plant styrene, PTA, MTO units
 Coal chemical methanol, MEG, olefin units
 Power plant FGD, boiler feedwater pretreatment
 Terminal loading/unloading pumps

 VIII. Model Number Explanation Example

Example: OH1 100250

 OH1: Construction type (overhung, foot-supported)
 100: Discharge diameter (mm)
 250: Impeller nominal diameter (mm)

Hydraulic and material customization is available based on user operating conditions.

 IX. Quality and Certification

 The company is ISO9001 certified 
 Products can undergo third-party witnessed testing per API610 requirements 
 Full performance test report provided (including NPSH, vibration, noise, temperature rise)

 X. Technical Services and Commitment

 Selection calculation sheet and outline installation drawing provided 
 24-hour after-sales service response 
 Long-term spare parts supply, critical components traceable to original factory 
 Old pump retrofit and energy-saving upgrade services available



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