We design, machine, assemble, and test vacuum pumps in our own building in Dongguan. 78 people, 32 CNC lines. We make five types: rotary vane, piston, claw, screw, and roots. We sell direct to buyers — no distributors, no agents, no "we will connect you with a factory" middlemen. This is the factory.

Manufacturer. You can come to Dongguan and watch us cut metal. We have had buyers from Germany, Thailand, Brazil, and the US walk the floor. No special cleaning before you arrive. What you see on the tour is what runs every day.

ISO 9001:2015 (certified since 2018). CE marking on all pumps shipped to the EU. We provide test reports with every pump — ultimate vacuum, pumping speed, motor current, noise, vibration. We can arrange third-party inspection (SGS, Bureau Veritas, TUV) at your cost. We are listed on several suppliers' approved vendor lists for pharmaceutical and technology buyers who require annual re-audits.

It depends on three things: flow rate, vacuum level, and what you are pumping. Rotary vane is the default for most lab and light industrial work — cheap, reliable, needs oil changes. Claw is dry, runs 24/7, costs more upfront but zero oil maintenance. Screw is for high-flow clean processes — semicon, chemical distillation, large freeze dryers. Piston is oil-free, lower vacuum, good for medical and dental. Roots pumps are boosters — they do not work alone. If you are not sure, tell us your application and we will recommend something. We have sold against our own product line before. Better than shipping the wrong pump.

Claw, screw, and roots pumps: yes. They are designed for continuous duty. Rotary vane: we rate them for intermittent duty, but many customers run them up to 16 hours a day. If you need a rotary vane to run 24/7, it will work — but expect to change oil weekly and rebuild the seals every 12-18 months. At that duty cycle, a claw pump usually pays for itself in maintenance savings alone within two years.

We ship every rotary vane pump with 0.5 L of our standard mineral vacuum oil. It works for most clean applications. For oxygen service or reactive gases, use PFPE (perfluoropolyether) oil — it will not react, but it costs more than the pump. For extended oil change intervals, we offer a synthetic option. Never use motor oil. Motor oil is not vacuum oil — it has detergents, it outgases, and it will not pull below about 50 Pa. We have opened pumps filled with 10W-40. The inside looked like a barbecue.

One. There is no MOQ. Order a single pump to test. If it works, reorder. If it does not, tell us why and we will fix it or refund you. Half our long-term OEM clients started with a single test unit. We remember which ones.

Email sales@goflexpump.com or fill out the contact form. Tell us what you need: pump type or application, flow rate, vacuum level, quantity, voltage, and destination. We reply within 24 hours with a formal quotation. Most quotes go out within 4 hours during Dongguan business hours. We do not charge for quotations. We do not require a deposit to look at your drawings.

T/T (wire transfer) — 30% deposit to start production, 70% before shipping. For orders under $5,000, we can do 100% before shipping if that is easier. We also accept L/C (letter of credit) for orders over $20,000, though the bank fees are on your side. Western Union for small sample orders. We are working on Alibaba Trade Assurance, but honestly, it adds 3% to the price and the dispute resolution is not great. Most of our repeat clients just wire directly.

Yes. We do it for distributors in 12 countries. Send us your brand manual and spec requirements. We handle the serial plates, paint color (for orders over 20 units), packaging with your logo, manuals with your company name, and shipping documents that show you as the exporter. Typical OEM lead time: 30-45 days from CAD approval to first article. We do not charge extra for OEM — the pump costs the same whether it says GOFLEX or your brand on the side. Our name is not stamped on the casting.

Within reason, yes. We change inlet/outlet fittings, motor voltages, seal materials, paint color, and accessories all the time. If you need a different mounting bracket, a custom inlet manifold, or a specific connector, send us the drawing. Our engineering team will tell you if it is doable and whether it affects the price. We do not charge engineering fees for simple adaptations. Complex redesigns — changing rotor geometry, adding stages, integrating control systems — we quote as a separate NRE (non-recurring engineering) project.

Every single one. Not batch samples. Every pump that leaves this building gets run on a test bench. We measure ultimate vacuum, pumping speed, motor current draw, noise level (dB at 1 meter), and vibration. Each measurement goes on a test report. The report goes in the crate with the pump. You get a PDF copy by email before it ships. If a pump does not meet its published spec, it does not leave the building.

12 months from the shipment date on the bill of lading. Covers manufacturing defects in materials and workmanship. Does not cover running the pump without oil, pumping concrete dust without a filter, using the pump as a boat anchor, or a forklift driving over it. We ship replacement parts within 3 business days for warranty claims. If the pump is genuinely defective, we replace the whole unit. This happens — maybe one in every 400 pumps — because we are a factory, not a magic show. The difference is we do not argue about it.

Standard models in stock: 3-5 days to produce. Custom/OEM: 30-45 days. Then add transit time. Sea freight to Europe: 25-35 days. To the US West Coast: 15-20 days. To the Middle East: 15-25 days. To Southeast Asia: 7-10 days. Air freight: 4-7 days anywhere, but costs 4-5x more. We ship FOB Shenzhen as standard. CIF and DDP available — we quote the door-to-door cost including customs clearance if you give us your delivery address and tax ID. Shipping cost depends on weight, volume, and destination. A standard RV020 (12 kg packaged) costs roughly $40-60 by air to Europe. A pallet of 20 pumps: $300-500. We will put the actual freight quote on your proforma invoice — not a padded estimate.

We have shipped to over 40 countries. The list includes the US, Canada, Mexico, Brazil, Germany, Italy, UK, France, Spain, Poland, Turkey, Saudi Arabia, UAE, India, Thailand, Vietnam, Indonesia, Australia, and others. If your country is not on this list, it does not mean we cannot ship there — it just means nobody from your country has ordered yet. We handle export documentation, certificates of origin, and any required compliance paperwork. If your country requires a specific certification we do not already hold, we will work with a local testing lab to get it — but that adds time and cost.