Trust Center

Everything on this page is either a photograph from our own plant or a figure the company publishes about itself. Where we cannot evidence something, we say so rather than filling the gap with a claim.

Company Record

1998Year the factory was founded
60+Countries and regions supplied
80%Share of output that is exported
1M+Spare parts held in stock
5,000Complete pumps held in stock
12 monthsWarranty on rebuilt pumps and parts

The Plant

Guli Industry Zone, Jiangning District, Nanjing. Every photograph below is our own.

SEIMT Hydraulics factory building in Guli Industry Zone Nanjing
The plant building. The company has manufactured hydraulic pump parts on this site since 1998.
CNC machining shop with turning and milling machines at SEIMT Hydraulics
The machining shop. Turning and milling happen here before parts go for heat treatment and grinding.
Parts warehouse racking holding hydraulic pump spare parts at SEIMT Hydraulics
The parts store, holding the stock that lets most orders ship the same day instead of waiting for production.

What We Commit To

  1. Rebuilt Pumps Are Tested Before PackingEvery rebuilt pump is run on the test bench and checked for volumetric efficiency, external leakage and sound level before it is boxed.
  2. Replacement Parts Are Inspected IndividuallyMachined parts pass dimensional and hardness inspection. Anything outside the drawing is scrapped rather than sorted into a second grade.
  3. Heat Treatment Follows the Original ProcessCase hardening, carburising and nitriding follow the same route as the original part so surface hardness and core toughness match.
  4. Hard To Find Parts Stay AvailableWe carry parts that the original equipment maker has moved off its price list, which keeps older machines earning.
  5. Twelve Month WarrantyRebuilt pumps and machined parts carry a twelve month warranty on the same terms as new original parts.
  6. Stock Ships the Same DayMore than one million spare parts and around five thousand complete pumps sit on the shelf, so most orders ship from stock.

Production Route

Model CodeDrawing CheckMachiningHeat TreatmentInspectionPacking
  1. Turning and millingBlanks are turned and milled from certified bar and forging stock on CNC machines.
  2. Heat treatmentCarburising, quenching, tempering or nitriding to the route the original part uses.
  3. GrindingBores, spline seats and running faces are ground after heat treatment so distortion is removed.
  4. Lapping and superfinishingValve plates, shoe faces and block faces are lapped so the pair seals under pressure.
  5. InspectionDimensions, hardness and surface finish are recorded against the drawing on a sampling plan.
  6. Assembly and testComplete pumps are built, run in and tested for efficiency, leakage and noise before packing.

Inspection and Test

  • Incoming material certificates are checked against the grade called for on the drawing.
  • Hardness is measured after heat treatment on every batch and recorded on the batch card.
  • Critical bores and running faces are gauged against the drawing tolerance, not against a sample part.
  • Mating parts are matched as a set so the block, shoes and valve plate run in together.
  • Rebuilt pumps are bench tested for volumetric efficiency, external leakage and sound level.
  • Parts are cleaned, oiled and vacuum sealed so they arrive without surface rust.

Documentation Supplied With An Order

Material certificateMill certificate for the steel grade used in the batch
Hardness reportSurface and core hardness readings after heat treatment
Dimensional reportMeasured values for the critical features named on the drawing
Test bench reportFlow, efficiency, leakage and sound readings for a rebuilt pump
Packing list and photographsCarton contents and photographs of the packed goods before shipment

Where a customer needs an approval or certification not listed here, we will say plainly whether we hold it rather than implying that we do.

Customer Feedback

Conversations reproduced with permission and with names removed.

Repair shop, Turkey
Cartridge kit arrived Tuesday, pump back on the press Wednesday. Flow is where it should be.
Glad it went in cleanly. Remember to change the return filter again after the first week.

WhatsApp conversation

Distributor, Germany
Second batch of cartridge kits is identical to the first. No complaints from customers.
Specification is locked for your range, so batches will keep matching.

WhatsApp conversation

Repair yard, Canada
Both winch drives rebuilt and tested before the vessel sailed. Spare ring set is on board.
Good to hear. Send the model codes when you need the next set and we will check stock the same day.

WhatsApp conversation

Project Cases

  • Excavator Travel Motor Rebuild Programme in Turkey

    Read the Case
  • Stocking Cartridge Kit Programme for a German Distributor

    Read the Case
  • Marine Winch Pump Refit for a Canadian Repair Yard

    Read the Case

Frequently Asked Questions

Which certifications do you hold?
Rather than list approvals we cannot evidence on a website, we supply the documents that actually accompany an order: material certificates, hardness reports, dimensional reports and test bench reports. If you need a specific approval, ask and we will tell you plainly whether we hold it.
Can we visit the factory?
Yes. The plant is in Guli Industry Zone, Jiangning District, Nanjing. Arrange a date by WhatsApp or email.
Can we audit your process?
Customers running private label programmes do this. Tell us what you need to see and we will arrange it.
How do I verify the numbers on this page?
Ask. Anything a buyer needs verified we will confirm in writing rather than leaving it as a claim on a web page.
Do you have export experience with our country?
Around eighty percent of production is exported to more than sixty countries and regions. Tell us your port and we will confirm shipping arrangements.

Ask Us To Verify Anything On This Page

Tell us the model code stamped on the pump, the quantity and your delivery port. A quotation with lead time usually comes back within one working day.

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