Dongguan, Guangdong, China — about an hour from Shenzhen

The factory is one building. Everything happens under one roof.

Raw aluminum and iron come in through the loading dock on the east side. Pumps in crates go out through the same dock on the west side. In between: 10 CNC lines, an assembly floor, a test area, and a small engineering office. 2,800 square meters. That is it. We do not outsource machining to a shop across town. We do not send pumps to a third-party testing lab. If you visit, you see everything in one walk.

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CNC machining lines

Production shifts

3000+

Square meters

Production workers

A walk through the building

From raw stock to a crated pump in four zones

The building is laid out in a straight line, east to west. Material flows in one direction. It is not fancy. It works.

Zone 1 — CNC Machining

East end of the building. 10 lines: 5 turning centers, 3 milling centers, 2 5-axis machines for complex housings. Morning shift runs the CNCs. Aluminum plates, cast iron blanks, steel bar stock come in and finished parts come out. Tightest tolerance we hold: 5 microns on rotor bore diameter.

Zone 2 — Sub-Assembly

Between machining and final assembly. Rotors get balanced. Vanes get matched to slots. Bearings get pressed. Small sub-assemblies — motor mounts, inlet flanges, oil return lines — get built here so final assembly is not hunting for parts.

Zone 3 — Final Assembly

Central floor. 12 assembly stations. Each station builds one pump from sub-assembled parts to a complete unit. Same technician handles the whole build. Afternoon shift does assembly. Torque wrenches on every station. Build records travel with the pump on a paper traveler — old school, but it does not crash.

Zone 4 — Test & Pack

West end. 8 test benches, sound-insulated. Every pump runs a standardized test cycle: ultimate vacuum, pumping speed curve, motor current draw, noise measurement at 1 meter, vibration. Data logged digitally. Pump then drained, sealed, wrapped, crated, labeled. Test report printed and placed inside the crate.

What the floor actually looks like

We do not have a photography department. Here is what we have.

5-axis CNC machining center. This one cuts rotor housings for the claw pump series. The operator's name is Li Wei. He has been on this machine since 2019.

Assembly floor, afternoon shift. 12 stations in two rows. The boards on the wall behind each station show the day's build schedule and any special customer requirements.

One of our 8 test benches. The screen on the left displays the real-time vacuum curve. The tech is watching for the curve to flatten — if it does not stabilize within the spec window, the pump fails.

Incoming inspection area. Raw castings, bar stock, bearings, seals — everything gets checked before it enters the production floor. We have rejected entire shipments of cast iron for porosity issues.

Finished goods area. Pumps in crates, organized by order number. The wooden crates are built in-house. We stopped using third-party crating after a shipment to Brazil arrived looking like it had been dropped from a helicopter.

West loading dock. This is where your pump leaves. The trucking company picks up here on Tuesday and Friday. Sea freight containers go out through Yantian port, about 45 minutes away.

How we run production

Two shifts. Same crew. Everyone knows the whole pump.

Morning shift: 7:00 AM to 3:30 PM. This is the machining shift. CNCs run hot. Aluminum chips pile up in the collection bins. By 3:30, the day's machined parts are on carts, organized by work order, ready for assembly.

Afternoon shift: 2:30 PM to 11:00 PM. Assembly and test. The overlap from 2:30 to 3:30 is when the two shifts hand off — morning crew tells afternoon crew if anything unusual happened with the machines, if a batch of material ran slightly off, if a particular housing needs an extra pass.

We rotate people between shifts and stations. The CNC operator who cuts screw pump rotors this month might be assembling roots boosters next month. It slows us down when someone rotates to a new station. But it means when you email us about a pump issue, the person reading your email has probably built that exact model at some point. Worth the trade-off.

The machines that make your pump

Equipment on the floor

CNC Turning Centers

5 units. Taiwanese-built, 3-axis. These do rotors, shafts, and cylindrical parts. Max workpiece diameter 400mm. We run them with carbide insert tooling. Coolant is recycled through a central filtration system — we change it every 90 days, not when it turns into sludge.

CNC Milling Centers

3 units. 3-axis vertical mills. Pump housings, end plates, mounting brackets. We added a fourth mill in 2023 to handle the screw pump housing demand. It sits in the corner, slightly newer than the rest, and the operators argue over who gets to run it.

5-Axis Machines

2 units. These handle the complex geometry — claw pump rotors, screw pump profiles, anything with curves that a 3-axis cannot reach. Programmed in-house. The CAM programmer used to work at a mold shop and brings bad habits about surface finish that we appreciate.

Test Benches

8 benches. Each has a calibrated vacuum gauge (Pirani + capacitance manometer), a mass flow meter, a power analyzer, a sound level meter, and a vibration sensor. Data goes to a central logging system. We can pull up the test record for any pump by serial number, going back to 2021.

Dynamic Balancer

Every rotor gets balanced. Single-plane for short rotors, two-plane for longer ones. We balance to G2.5 grade — overkill for most vacuum pump applications, but it keeps the noise down and the bearings happy. The balancer is German. We paid too much for it. It has never been wrong.

Inspection Tools

CMM (coordinate measuring machine) for dimensional inspection. Surface roughness tester. Hardness tester. Ultrasonic thickness gauge for casting wall thickness. All calibrated annually. Calibration certificates available if your quality auditor wants to see them.

You are welcome here

Come see the floor for yourself

We have had buyers from Germany, Thailand, Brazil, Turkey, the US, and a dozen other countries walk this floor. We do not do a special cleaning before you arrive. What you see during your visit is what your production batch looks like every day.

We are in Dongguan, about one hour by car from Shenzhen Bao'an International Airport or Guangzhou Baiyun International Airport. Send us your travel dates and we will arrange pickup, a translator if you need one, and a hotel recommendation nearby. There is a decent hotpot place 10 minutes from the factory that we take every visitor to. It is not part of the sales pitch. It is just good hotpot.

Factory visits typically take 2-3 hours. You see the whole building. You meet the people who will build your order. You can ask them anything. Most visitors spend more time at the test benches than anywhere else — watching their specific pump model go through its cycle is oddly satisfying.

Schedule a factory visit

Getting here

Location and logistics

From Shenzhen Airport

About 60 minutes by car. We send a driver to meet you at arrivals. If your flight lands late, we can pick you up the next morning instead. The highway from Shenzhen to Dongguan is well-maintained. The tolls are annoying but unavoidable.

From Guangzhou Airport

About 70 minutes by car. Guangzhou Baiyun is a larger hub with more international flights. If you are flying in from Europe or the Middle East, this is probably where you land. We can pick you up here too.

By Sea — Yantian Port

About 45 minutes from the factory. One of the busiest container ports in the world. Your shipment will likely leave from here. We can arrange for you to see the port logistics if that matters to your supply chain team.

Want to see where your pumps come from?

Send us your preferred dates. We will confirm within 24 hours and handle the logistics.

Plan your visit