High Temperature Thermal Oil High Speed Centrifugal Pump 350°C Heat Transfer
High Temperature Thermal Oil High Speed Centrifugal Pump 350°C Heat Transfer
High Temperature Thermal Oil High Speed Centrifugal Pump 350°C Heat Transfer
Brand Name
Sunstrand
PRODUCT MODEL
HTHS-350-TOCP
certificate
ISO 9001:2015, API 610, PED 2014/68/EU
country of origin
China
MOQ
1 Set
unit price
Negotiation
payment method
T/T,L/C
Supply Capacity
6 Sets per Month
Product Summary
High temperature thermal oil high speed centrifugal pump rated for continuous operation at 350°C, engineered for heat transfer fluid circulation in chemical reactors, pharmaceutical processing, and concentrated solar power applications.
Product Details
Highlight:
Thermal Oil Centrifugal Pump
,High Temperature Process Pump
,Heat Transfer Fluid Circulation
Maximum Operating Temperature:
350°C (662°F)
Heat Transfer Fluids:
Thermal Oil, Synthetic HTF, Molten Salt
Maximum Flow:
85 M³/h (375 GPM)
Maximum TDH:
600 M (1,970 Ft) At Temperature
Casing Material:
High-Temperature Alloy Steel / 316H SS
Seal System:
API 682 High-Temperature Bellows Seal
Cooling Requirement:
Seal Cooler With Forced Air Or Water
Insulation:
Pre-Insulated Casing Option Available
Design Code:
API 610 OH6, PED 2014/68/EU
Product Description
High Temperature Thermal Oil High Speed Centrifugal Pump 350°C Heat Transfer
High Temperature Thermal Oil High Speed Centrifugal Pump for Heat Transfer Service
Our thermal oil pump program originated from a 2014 collaboration with a European chemical engineering company that required a circulation pump for a synthetic heat transfer fluid system operating at 320°C continuous temperature in a polymer manufacturing process. The project's technical specification included a requirement that we had not previously encountered: demonstration of creep life analysis for the pressure casing at the design temperature, with supporting finite element analysis showing that casing stresses remained within the ASME Section VIII Division 2 time-dependent allowable stress limits for the specified design life of 100,000 hours.
This challenging requirement led our engineering team to develop a comprehensive elevated-temperature mechanical design methodology that has since been applied to over 60 thermal oil pump projects across chemical, pharmaceutical, plastics, and concentrated solar power applications.
The mechanical design of each high temperature centrifugal pump for thermal oil service begins with material selection based on the specific operating temperature and heat transfer fluid composition. For synthetic organic heat transfer fluids at temperatures up to 350°C, 1.25Cr-0.5Mo alloy steel (ASTM A217 Grade WC6) provides an optimal combination of elevated-temperature strength, oxidation resistance, and cost. For applications exceeding 350°C or involving particularly aggressive synthetic fluids, we upgrade to 2.25Cr-1Mo (ASTM A217 Grade WC9) or 316H stainless steel.
Technical Specifications
| Parameter | Specification | Design Basis |
|---|---|---|
| Maximum Operating Temperature | 350°C (662°F) Continuous | Creep analysis per ASME VIII-2 |
| Compatible HT Fluids | Synthetic & Mineral Thermal Oils | Material compatibility per fluid manufacturer data |
| Maximum Flow Rate | 85 m³/h (375 GPM) | Performance curve at operating temperature |
| Maximum Differential Head | 600 m (1,970 ft) at Rated Temperature | Density-corrected for hot fluid conditions |
| Design Standard | API 610 12th Ed., OH6 + PED 2014/68/EU | Design review per API 610 Annex A |
| Casing Material Options | 1.25Cr-0.5Mo, 2.25Cr-1Mo, 316H SS | Selection per temperature & fluid chemistry |
| Seal Technology | API 682 High-Temp Metal Bellows Cartridge | Inconel 718 bellows, flexible graphite secondary |
| Seal Cooling | Forced Convection Air Cooler or Plan 23+ | Thermal analysis, seal chamber ≤ 120°C |
| Bearing Housing | Integral Cooling Jacket, Finned Air Cooling | Bearing temperature maintained ≤ 85°C |
| Thermal Expansion | Centerline Support, Sliding Baseplate | Calculated growth, sliding element design |
| Pressure Design Code | PED 2014/68/EU Category III / ASME VIII-1 | Notified body / AIA certification as required |
Elevated-Temperature Engineering & Design Validation
- Creep Life Analysis Methodology: For every thermal oil pump operating above the material's creep threshold temperature, our engineering team performs a creep life analysis using Larson-Miller parameter data from ASME Section II Part D and API 579-1/ASME FFS-1. The analysis calculates the time to reach the minimum creep rupture stress at the maximum stress location in the casing as identified by FEA, providing a quantitative design life prediction that is documented in the pump's mechanical design report.
- Thermal Expansion Management System: Field temperature measurements revealed that differential thermal expansion between the hot pump casing and ambient-temperature baseplate was creating pipe strain and casing distortion. The solution is a centerline-supported casing design with a sliding baseplate that permits the pump casing to expand freely while maintaining shaft alignment.
- High-Temperature Seal Reliability Program: Mechanical seal reliability at elevated temperatures was identified as the dominant technical risk. Through iterative testing, we qualified the current design: a metal bellows cartridge seal with Inconel 718 bellows, flexible graphite secondary seals, and silicon carbide vs. carbon-graphite seal faces with diamond-like carbon coating.
- Thermal Oil Degradation Prevention: Our CFD analysis specifically evaluates fluid residence time distribution, with the design objective of eliminating stagnation zones where fluid could remain in contact with hot metal surfaces. The validated hydraulic design maintains continuous fluid velocity above 0.5 m/s at all wetted surfaces.
Frequently Asked Questions
Q1: What is the specific startup procedure for the thermal oil pump, and what happens if the heat-up rate is exceeded?
Based on thermal stress analysis and operational feedback, our recommended heat-up procedure is to increase the pump casing temperature at a rate not exceeding 50°C per hour. The pump shaft should be slowly rotated at 15-minute intervals during heat-up to prevent rotor bow from asymmetric heating. If the heat-up rate is exceeded, the primary risk is temporary rotor bow causing elevated vibration at startup.
Q2: How do you verify that the metal bellows seal will perform reliably at 350°C over the expected operating life?
Our seal qualification program included specific testing beyond standard API 682 requirements. The Inconel 718 bellows was subjected to axial movement tests, static pressure tests, and dynamic tests at elevated temperatures with thermal cycling. In field service, we have metal bellows seals operating in thermal oil service with documented service lives exceeding 36 months.
Q3: Is the thermal oil pump suitable for molten salt service in concentrated solar power applications?
Our standard thermal oil pump is rated for organic and synthetic heat transfer fluids up to 350°C and is not suitable for molten salt service, which typically operates at 400-565°C. Molten salt applications require a fundamentally different pump design with specialized materials and high-temperature seal technology.
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