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MO-10 Oil Cooler
Medium frame shell-and-tube oil/water cooler from the MO series for steam turbine and turbogenerator lube and control-oil systems. Manufactured per TU 108-1454-87 and GOST 31842-2012, sized from the questionnaire, drop-in replacement without piping rework.
Quote in 1–2 business days24-month warrantyDelivery across Russia
Purpose of the MO-10 oil cooler
Role in the turbine lube system and when this frame size is chosen
The MO-10 is a medium shell-and-tube frame in the MO series for steam turbine and turbogenerator lube systems where stable heat removal is required at higher oil flow in the lubrication and control circuit. Oil passes through the shell side, cooling water through the tube bundle; outlet oil temperature is maintained within the set range regardless of season and unit load.
MO-10 is selected when calculated heat load and indicative oil flow (~400 l/min industry practice for MO-10) exceed MO-4 and MO-2.5 capability but do not yet require MO-20. This is typical for medium-power turbogenerator units with main and standby oil coolers in a block layout.
Undersized or oversized heat exchange surface directly affects bearing and oil life: overheating reduces oil-film capacity, unstable temperature worsens control performance. Final MO-10 selection is done only after calculation from your turbine data — unit type, flows, temperatures and cooling water type.
- Medium MO frame for TGU and mid-power turbines
- Single- or double-pass layout per lube system scheme
- Tube materials L68, 08Kh18N10T or MNZh5-1 for water type
- Drop-in equivalent with existing connection dimensions
MO-10 technical specifications
Indicative values for enquiry — exact figures from the questionnaire
The table below shows typical indicative values for MO-10. We do not publish fabricated datasheet numbers: operating parameters, mass and dimensions of a specific build are agreed after calculation and, if needed, survey of the existing unit on site.
| Model | Q, kW | Oil flow, l/min | Water flow, m³/h | Oil t in/out, °C | Water t, °C | P work, MPa | P test, MPa | Mass, kg | Dimensions, mm | Order |
|---|---|---|---|---|---|---|---|---|---|---|
| MO-10 | 150–400* | ≈400* | per calculation* | 45 → 35* | ≤ 35 | per TU / datasheet | per GOST 31842-2012 | per drawing | per drawing |
* Indicative values for the MO series and industry practice. The number in MO-10 is not the heat exchange surface in m². Exact heat load, flows, mass and dimensions are confirmed via the questionnaire and datasheet for your turbine unit.
Design and materials
Shell-and-tube oil/water layout and tube bundle material
MO-10 is a shell-and-tube unit: the shell carries turbine oil, the tube bundle carries cooling water. Heat transfers through the tube wall. Layout may be single- or double-pass on oil or water side depending on your system hydraulics and pressure drop limits.
Tube material matches cooling water aggressiveness. Fresh water — brass L68 and LAMsh (GOST R 51573-2000 tubes). Aggressive media — stainless 08Kh18N10T (GOST 9941-81, composition GOST 5632-2014). Seawater — copper-nickel MNZh5-1 (GOST 10092-2006).
Manufacturing follows industry TU (including TU 108-1454-87) and GOST 31842-2012 for shell-and-tube heat exchangers. Cooling water for steam turbine lube systems must meet GOST 20689-80 — typically fresh water not above 35 °C.
Shell and heads
Steel, nozzles welded to match your piping.
Tube bundle
L68 / 08Kh18N10T / MNZh5-1 for water type and duty.
Seals
Selected for site oil pressure and temperature.
Block frame
Optional main + standby MO-10 with changeover.
Operating principle
How oil and water flow in the MO-10 cooler
Hot oil from the turbine lube system enters the shell and flows over the outside of the tubes. Cooling water circulates inside the tubes. Heat transfers to water; cooled oil returns to the tank and is supplied to bearings and the control system.
Water and oil flow, number of passes and temperature profile are sized so that at rated turbine load outlet oil temperature stays within limits set by the turbine OEM or retrofit project. Use the calculator on this page for a preliminary estimate — our engineer then fixes the frame in the specification.
Oil (shell side) Water (tube bundle)
Compatibility with turbine units
Where MO-10 is used and how fit is confirmed
MO-10 serves as main or standby oil cooler in mid-power steam turbine and turbogenerator lube systems — including retrofits where a worn unit must be replaced without piping changes. Fit is confirmed by lube system passport data, not turbine nameplate alone: flow, temperatures, pressures, connection sizes.
Designations such as PT-60, K-300 appear in project docs as examples of unit classes that used MO-series coolers of matching frame size. We do not publish a universal “turbine model → MO-10” table without a datasheet: selection is from the questionnaire, drawing or survey of the existing cooler.
- Turbogenerator units 4–25 MW (power class indicative)
- Steam turbines with controlled extraction and backpressure
- Lube system retrofit replacing obsolete oil cooler
Compatibility with a specific turbine unit (PT, K, R, etc.) is confirmed only from the datasheet, questionnaire or on-site survey.
Comparison: MO-10, MO-4 and MO-2.5
When a smaller frame is enough and when MO-10 is required
| Parameter | MO-2,5 | MO-4 | MO-10 |
|---|---|---|---|
| Indicative oil flow, l/min | ≈100 | ≈160 | ≈400 |
| Frame class | Small | Small / medium | Medium |
| Typical application | Drive and low-power turbines | Small TGU, auxiliary circuits | Medium TGU, main/standby circuit |
| Block design | Rare | Yes | Yes (main + standby) |
| Calculator selection | Yes | Yes | Yes |
Final frame selection follows thermal calculation, not the indicative table alone.
See the full range on MO series oil coolers. Related: turbine oil coolers.
Manufacturing, lead time and warranty
How to order MO-10 from RUSTRADE
After receiving the questionnaire or existing unit parameters, our engineer runs the thermal calculation, agrees tube material and connection scheme. Quotation with indicative lead time and price within 1–2 business days.
Standard MO-10 lead time — 2–4 months from specification approval; block layout with two coolers on one frame — 3–5 months. Warranty — 24 months from commissioning with proper operation and water treatment per GOST 20689-80.
1
Questionnaire or existing cooler datasheet
2
Thermal calculation and MO-10 configuration
3
Quotation and specification approval
4
Manufacturing, inspection, shipment and documentation
Drop-in replacement without piping rework
Replace an obsolete cooler with MO-10 at the same connections
1
Send mark, datasheet or nameplate photo of the current unit.
2
We match flows, temperatures and nozzle layout dimensions.
3
Build MO-10 (or nearest MO frame) for your flanges and elevations.
4
Deliver with documentation for installation and commissioning.
MO-10 calculation questionnaire
Download the PDF form, fill in turbine and oil circuit parameters — our engineer will fix the frame size and prepare a quotation without extra back-and-forth.
- Specify turbine mark, oil flow and temperatures, cooling water parameters and connection sizes.
- When replacing an existing unit, attach the datasheet or survey drawing for nozzle fit.
- Send the completed form via the enquiry modal on this page — we respond with calculation in 1–2 business days.
Heat load calculator
Estimate indicative heat load and required surface — then send the result to our engineer to fix the MO-10 frame.
Oil cooler selection calculator
Indicative heat load and heat exchange surface estimate — the exact MO frame size is confirmed via the questionnaire
Input data
From the turbine lube oil system (manual/regulations)
Indicative result
Oil temperature drop15 °C
Heat load218 kW
Mean temperature difference24.5 °C
Required heat exchange surface9.9–35.5 m²
Nearest MO series frame size is selected by calculated surface area:
МО-05МО-2МО-2,5МО-4МО-10МО-20
Simplified calculation (k = 250–900 W/m²·K, oil cp ≈ 2 kJ/kg·K). Final selection — via questionnaire including fouling, water type and layout.
What next?
- We confirm oil flow, temperatures and cooling water type via the questionnaire.
- We select the MO frame size (or a replacement for your existing unit) and tube material.
- Quotation with price, dimensions and lead time within 1–2 business days.
Request MO-10 oil cooler calculation
Specify customer type (operator, EPC, service company) and attach available data — we will return calculation and quotation.
Ответы на вопросы
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No. The number in the MO series mark is not surface area in m². For MO-10 it relates to nominal oil flow class (indicative ~400 l/min in industry practice); exact surface and hydraulics are calculated for your turbine.
MO-10 is a medium frame with higher indicative oil flow and heat load. MO-2.5 and MO-4 suit less loaded circuits on small and mid-low power units. See the comparison table; final choice uses the calculator and questionnaire.
Yes. We build to your connection dimensions and nozzle locations. A datasheet of the current unit or a survey drawing is sufficient.
Fresh water — brass L68/LAMsh; aggressive media — 08Kh18N10T; seawater — MNZh5-1. Choice is fixed in the spec considering GOST 20689-80 and actual cooling water quality on site.
Standard build — 2–4 months after spec approval; block layout — 3–5 months. Quotation — 1–2 business days. Warranty — 24 months from commissioning.
GOST 9916-77 on turbine oil coolers is withdrawn; units are built per TU 108-1454-87 and GOST 31842-2012. Water requirements — GOST 20689-80 (typically ≤35 °C).
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Answers to frequently asked questions about turbogenerator units, delivery times and cooperation terms
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