The answers we would want before buying a machine from strangers.

Because the commission would be in your price. We would rather spend that money on the seal faces and tell you the truth about the machine. You get a direct line to the people who specify and build it, and a price you can take apart line by line.

What the product is and what is in it, solids content and viscosity, target fineness (D50/D90 or grind gauge), litres per hour or litres per batch, your cooling-water temperature and pressure, your supply voltage, frequency and phases, your destination port and Incoterm, and when you need it running. Eight numbers. The quote form asks for exactly these.

Same working day for a standard machine, within 24 hours including Saturday for most enquiries. A non-standard build with a drawing to check takes one to two days because the technical lead looks at it personally.

Yes, and we prefer it. Send 3–5 kg. We grind on a lab unit and return the sample with a report: fineness at each pass, current draw, outlet temperature, flow rate, screen used, bead size and the machine we would recommend with its cost breakdown. Solvent-bearing samples must go by sea freight and we will tell you the route before you ship anything.

We do not publish a number, because a RWM-P5 in 304 with a standard seal and a RWM-P5 with a ceramic chamber, carbide pins, an Ex motor and a PLC are the same model name and a very different machine. Send your specification and you will get the breakdown — base, material upgrade, seal grade, drive, spares, packing, inland freight — with each line priced.

Visit; the workshop is open and we will collect you. If a trip is not realistic, the live video audit is genuinely better than a staged tour because you direct it. Third-party inspection is welcome and we will meet their surveyor at the gate.

Open to it, but not at the cost of your price. We will discuss exclusive arrangements once we have shipped together a few times and you have run our machines in your own market. First orders normally go direct.

English and Chinese on WhatsApp, and this website is published in English, Chinese, French, Portuguese, Russian and Arabic. Panels and nameplates can be labelled in Spanish, Portuguese, French or Arabic on request. Documentation is English as standard.

Because the chamber is not made in Switzerland and because we do not carry a distributor margin. The parts that decide machine life — seal faces, screen, bearings, motor — we buy to the same specification. Where we save money you will see it listed as a saving, not hidden as a substitution.

One machine usually covers both, if you size it for the ink rather than the paint. Ink and pigment concentrates grind finer, in smaller volumes, and change colour often, so they want a small chamber, fine media and a fast, thorough flush — an RWM-P5 or RWM-P20, or an RWM-B where the target is under a micron. Paint tolerates coarser media and larger throughput, and a machine bought for paint will still grind ink; the reverse is only true if you accept the smaller batch volume. The two things that genuinely force a second machine are shade cross-contamination you cannot flush out, and a colour specification that rules out iron pick-up, which puts the ink side on ceramic while the paint side stays on 304. Send both product lists and we will say plainly whether one machine is an honest answer.

On a water-based pigment grind at 20 hours a day, expect a face set per year. Two years on a gentle detergent duty. Six months if you run solvent with the wrong elastomer, which is why we ask about solvent before we quote. Every machine ships with a spare cartridge so the answer to a failure is a 45-minute job, not a three-week wait.

Within a band, yes — the screen slot has to sit at roughly one third to one half of the smallest bead diameter, so moving from 1.0 mm to 0.3 mm beads means a different screen and usually a different speed range. Buy a second screen set at order; it is a small line item and a large headache if you need it in six months.

Yes, in three places: seal elastomers (FKM swells in aromatics, so FFKM), motor and panel protection if the room is classified, and the jacket arrangement at the outlet end where evaporation causes skinning. Tell us the solvent and its percentage; it is never a detail.

A RWM-20B at full load rejects roughly the difference between motor input and product enthalpy rise — plan on 3–6 m³/h at 20–25 °C inlet for a production machine, more in a hot climate. We size the jacket and the flow switch for the water you can actually supply, so tell us its temperature, not just that you have a tower.

On lab machines it is standard, because you are developing a formula and speed is a variable. On production, we recommend it whenever you run more than one product or grind heat-sensitive material — the ability to start slowly on a full chamber also saves the coupling and the gear teeth.

Because catalogue seal arrangements assume a horizontal shaft. Vertically mounted, the whole gear set sits in oil and the lip seal holds a static head it was never designed for. That is exactly the failure we modify for — see the failure modes on the drive page.

Whatever you confirm at order. Standard is 380–415 V / 50 Hz three-phase; we wind and label for 220, 380, 400, 415, 440, 460, 480 and 660 V at 50 or 60 Hz, and 110/220 V single-phase for lab units. Getting this wrong is the most common avoidable problem in export — we write it on the nameplate and in the packing list twice.

Drain the chamber, then run the flush liquid through at low shaft speed with the beads still in — the beads are what scrub the wall, so flushing an empty chamber does far less than people expect. Keep flushing until what comes back runs clear. Then take the outlet screen out and clean it by hand: a screen that looks clear from the outside is often still blinded on the inside face, and that is where a blocked separator starts. Never leave product in a stopped chamber overnight; it consolidates, the screen blocks, and the next start is a pressure event rather than a normal start. If your cleaning agent attacks FKM or a particular liner, tell us at order and we will quote the elastomer and liner that tolerate it. On food and cosmetic builds we fit a clean-in-place spray ball and hand over the written sequence.

Usually it is the machine, and it is worth diagnosing before you blame the pigment. Metal gets in from four places: the rotor pins and chamber wall wearing into the product, the outlet screen seat, a worn mechanical seal face shedding, and wear downstream in the pump or pipework. On a white or near-white product we move the wetted path to zirconia ceramic or PU and specify a hard screen, which removes the first cause and most of the fourth. What we will not do is call the machine metal-free: the shaft, the fasteners and the housing are still steel behind a liner, so the honest specification is no iron or carbon-steel contact with the product, plus a written list of everything the product does touch. Send us the specks and we will tell you which of the four you are looking at.

Twelve months from bill of lading date against manufacturing defect on the machine. Wear parts — seal faces, screens, rotor pins, O-rings, liners — are covered for three months against defect. Inside the first twelve months, if we confirm a defect, freight both ways is on us.

Five things, and all of them are avoidable: energising at the wrong voltage; running the chamber without cooling water flow; using a seal grade that does not match the solvent you put in it; opening a pressurised chamber; and bypassing an interlock. We will not argue about the first two — we confirm your supply in writing before winding, and put a flow interlock in as standard.

Yes, deliberately. The general-arrangement drawing we release with your machine carries the dimensional drawings of the liner, pins, screen and seal cartridge, with tolerances. That is your protection: you are never hostage to us for a consumable. Many customers buy the seal cartridge locally after year two and it works fine.

Stocked wear items leave in 2–4 days and reach most destinations in 4–7 days by air courier. Send the model and the shaft stamp number from the nameplate — that is the whole enquiry. For anything not stocked, we send the drawing and the lead time the same day.

You send us the model and the shaft stamp number from the nameplate. We hold chamber liners, rotor pins, bead screens, seal cartridges and O-rings for every machine we ship, and we publish the dimensional drawing of your machine so you can also buy locally. First-year failures of normal wear parts are covered; freight both ways is on us for the first 12 months.

FOB Qingdao as default — we handle inland freight, export customs and the booking to the vessel. CIF and CFR to your port on request. DDP is possible to selected ports through our forwarder; ask and we will quote it honestly including the duty risk.

30 % telegraphic transfer to start the build, 70 % before shipment — and only after your video audit of your own machine. Letter of credit at sight is negotiable on larger orders. For samples and small spare-part orders we take PayPal or a card link so the paperwork is not more expensive than the parts.

Machine bolted to a skid with lifting lugs, desiccant and VCI emitter, shrink-wrapped, inside a fumigation-free plywood crate (or ISPM-15 treated timber if you prefer). The chamber is drained and preserved for sea transit, the panel is packed separately and flanged, and loose spares are crated and numbered against the packing list. We photograph the lashing before the lid goes on and send you the set.

Yes. Lab machine plus production machine plus spares in one 20 GP or 40 HQ is common, and it saves more than the wait costs. If you are also buying tanks, pumps or packing lines from other Chinese suppliers, we will consolidate for you and charge you for the pallets, not for the favour.