Identify
Existing 3700Use the model, size, serial number or other information already available from the installed pump.
API 610 OH2 REPLACEMENT SOLUTION
Goulds 3700 Replacement Pump — API 610 OH2
A severe-service API 610 / ISO 13709 OH2 replacement platform for existing 3700 installations, engineered around hydraulic performance, process conditions, materials, seal configuration and installation interfaces.
Start with the pump size, duty point or purchasing specification you already have. Additional engineering details can be confirmed after the initial RFQ.
- 1,930 m³/h
- Series capacity envelope
- 360 m
- Maximum head
- 425°C
- High-temperature service
- 60 bar
- Pressure capability
REPLACEMENT PATH
Replacing an Existing 3700? Start Here.
Match
Hydraulic + MechanicalReview flow, head, speed, impeller, materials, seal and severe-service options.
Verify
Installation InterfacesConfirm nozzle arrangement, shaft centerline, baseplate, driver, coupling and project interfaces.
REPLACEMENT CAPABILITY
API 610 OH2 Performance for Refinery and Petrochemical Service
Published values describe the replacement platform series envelope. Final selection is confirmed against the required duty and installed configuration.
| Parameter | Replacement capability |
|---|---|
| Pump Type | Single-stage, overhung OH2 |
| Standard | API 610 / ISO 13709 |
| Mounting | Centerline mounted |
| Suction | End suction |
| Capacity | Up to 1,930 m³/h |
| Head | Up to 360 m |
| Temperature | Up to 425°C |
| Pressure | Up to 60 bar |
| Configuration | Standard + low-flow |
| Seal | API 682-compatible arrangements |
ENGINEERING VERIFICATION
What We Verify Before a Replacement Is Released
Hydraulic Match
Flow, head, speed, impeller, operating range and NPSH.
Dimensional Match
Nozzles, shaft centerline, footprint, coupling and installation interfaces.
Process Match
Pressure, temperature, liquid properties and metallurgy.
Seal & Auxiliary System
Mechanical seal, API seal plan, cooling, lubrication and package requirements.
HYDRAULIC COVERAGE
Broad Coverage for 50 Hz and 60 Hz API 610 OH2 Duties
Final selection is based on the required duty point, speed, liquid properties, NPSH and operating range. Existing performance curves can be used as a direct engineering input.
Send Duty Point for Selection
HYDRAULIC CONFIGURATION
Standard and Low-Flow Configurations
Closed-Impeller Configuration
For normal refinery and petrochemical process duties within the selected operating range.
Open Radial-Vane Configuration
For low-flow duties where conventional enclosed-impeller passages are impractical.
Need to replace a 3700LF? Review Low-Flow Duty →SEVERE-SERVICE ENGINEERING
Built Around High-Temperature Reliability
Heat Management
Heat flinger plus air- or water-cooling options where the application requires them.
Bearing Environment
Large oil sump and engineered bearing lubrication for demanding continuous service.
Oil Mist Capability
Pure or purge oil-mist arrangements can be reviewed with project requirements.
API Seal System
API 682-compatible seal chamber and project-specific auxiliary plan review.
Rigid Support
Centerline casing support and heavy-duty pedestal for thermal and mechanical stability.
Special Duty Options
Low-flow hydraulics, optional inducer and other requirements reviewed per application.
API 610 OH2 CONSTRUCTION
API 610 OH2 Mechanical Architecture
A neutral engineering view of the principal replacement interfaces. Final details are controlled by the selected size, metallurgy, seal and package specification.
- Tangential discharge
- Renewable wear rings
- Closed impeller / low-flow option
- Heavy-duty shaft
- API 682-compatible seal chamber
- Thrust + radial bearings
- Heavy-duty bearing frame
MATERIAL OPTIONS
API 610 Materials of Construction
Common API material classes include S-4, S-6, S-8, C-6 and A-8. Final component metallurgy is confirmed for the selected configuration and process service.
| Component | Typical material options |
|---|---|
| Casing | Carbon Steel / 12% Chrome / 316L SS |
| Impeller | Carbon Steel / 12% Chrome / 316L SS |
| Shaft | AISI 4140 / 410 SS / 316L SS |
| Throat Bushing | Cast Iron / 410 SS / 316L SS |
| Wear Rings | Cast Iron / 12% Chrome / 316L / Nitronic 60 |
| Seal Chamber Cover | Carbon Steel / 12% Chrome / 316L SS |
PROCESS SERVICES
Refinery & Petrochemical Applications
- Column Reflux
- Hot Oil
- Column Bottoms
- Reboiler
- Reactor Feed
- Heat Transfer
- Tower Bottoms
- Heavy Gas Oil
- Hydrocarbon Transfer
- Scrubber Circulation
MAINTENANCE SCOPE
Goulds 3700 Replacement Parts & Assemblies
Complete replacement pumps remain the primary scope. Selected components can also be reviewed against the installed size, part reference, drawing and mating interfaces.
- Casing
- Impeller
- Shaft
- Applicable Cover / Seal Chamber Cover
- Selected Metallic Mechanical-Seal Components — drawing review required
- Complete Pump / Assembly Review
BUYER QUESTIONS
Goulds 3700 Replacement FAQ
Can you replace an existing Goulds 3700 pump?
Yes. Start with the installed size, duty point or purchasing specification you already have. Engineering can confirm any additional information after the initial RFQ.
Is the replacement API 610 OH2?
The replacement platform is a single-stage, overhung, centerline-mounted OH2 process-pump configuration for API 610 / ISO 13709 applications.
Can you match my existing performance curve?
Yes. Flow, head, speed, impeller selection and operating range can be reviewed against the existing curve or required duty point.
Can you supply 3700 replacement parts?
Replacement scope can include complete pumps and selected casing, impeller, shaft, applicable cover and drawing-based metallic seal components. Wear rings and bearing-related components remain technical construction references, not standalone supply.
Do you support high-temperature service?
Configurations are available for severe-service duties within the published series envelope, including temperatures up to 425°C.
Do you offer low-flow configurations?
Yes. Low-flow configurations can be selected for applications that are unsuitable for conventional enclosed-impeller hydraulics.
Is 3700i the same as the older 3700?
No automatic interchangeability should be assumed. The installed configuration should be identified and reviewed before selecting the replacement.
What information should I send for a replacement quotation?
Start with the existing pump size, purchasing description or duty information you already have. Additional technical details can be confirmed after engineering review.
FAST RFQ
Request a 3700 Replacement Quote
Keep the first RFQ short. Paste the purchasing description or enter only the details you already know; engineering can request anything else after review.
Form structure references the live 3796 replacement RFQ pattern so replacement pages stay consistent across the site.
Goulds 3700 is referenced for replacement identification only. ANSI Pumps Pro is an independent pump manufacturer and is not affiliated with the referenced brand owner.
Tell us what you are replacing
Paste the buyer specification as received, or complete only the fields you already know.
Preview only. The live implementation should reuse the site’s existing RFQ/Gravity Forms logic and validation rather than creating a disconnected static form.