Weir Slurry Pump Field Checklist: Six Things I Check Before Signing Off

Fourteen documented mistakes. Just over $32,000 in wasted budget. That's not a flex—it's the cost of learning how to specify and install Weir slurry pumps in mining, water, and industrial applications. I'm not an engineer. I'm the guy who handles orders, then handles the phone calls when the order doesn't work. This is the checklist I now use with every weir slurry pump quote, every replacement part, and every site visit.

Use this if you're about to buy a weir slurry pump, commission one, or retrofit a pumping system. It's written for the real world, not the vendor brochure. Six steps, plus one set of things I still mess up.

The six-step checklist

1. Confirm the actual slurry data.
2. Check NPSH against the site.
3. Choose wear material before price.
4. Plan the crane lift.
5. Verify field power before testing.
6. Document the old part before removing it.

Step 1: Nail down the actual slurry data before you talk pricing

In my first year (2017), I ordered a rubber-lined pump for a hard rock mine. I looked at the flow rate, saw the discharge size matched, and skipped the particle size distribution. The solids were sharp, angular, and heavy. Six weeks later the liner was shredded. The pump was a genuine Weir slurry pump, but it was the wrong configuration. Replacing it cost about $8,900 and a lot of respect.

Most buyers focus on horsepower and pipe size. They completely miss particle shape, specific gravity, pH, gas content, and the difference between a pump running continuously and one that starts and stops every few minutes. Weir mining technology is built to handle these variables—but the selection tools only work if you feed them real data.

The question everyone asks is: What's the price? The question they should ask is: What's the wear life per ton of slurry? That number changes every material decision downstream.

Step 2: Check NPSH against the site, not the catalog

I do not claim to be a pump hydraulic expert. But I have stood next to a cavitating pump and listened to it sound like gravel inside a blender. The vendor quoted a pump that met the system flow, but the available NPSH at the site was lower than the pump's required NPSH. It eroded the impeller in less than a season.

The fix is simple in theory: leave margin. In practice, measure the actual suction line, the line length, the elbows, and the static head. If you're not 100% sure how to calculate it, ask Weir's application team or a hydraulics person before you approve the submittal. I was too embarrassed to ask once. I won't make that mistake again.

Step 3: Wear material is a brand image decision, not a spare parts line item

Here's where I'm probably going to sound like a salesperson, but I'm not selling anything. I switched from a third-party 'equivalent' wear set to a genuine Weir wear package on a cyclone feed pump. The price was roughly 60% higher. The pump ran eleven months instead of five. The client didn't send me a thank-you note, but they stopped calling me with breakdowns.

You can spec hard metal, rubber, ceramic, or hybrid. Choosing the cheap one because the PO is due this quarter is the fastest way to turn a good pump into a bad story. And word travels. Clients remember the pump that didn't die; they remember the pump that did.

When I switched from budget liners to the proper Weir mining technology option, the cost per ton of material pumped went down. That's the metric that matters. If a buyer only sees the upfront difference, they're looking at the wrong number.

Step 4: Plan the crane lift like the power line is invisible

Before the crane arrives, ask the question that should be on every pre-lift checklist: which of the following is the most dangerous factor among crane accidents? The answer, based on OSHA's incident data, is contact with energized power lines. Not load weight. Not wind. Not the operator's experience.

Overhead power lines are the leading cause of crane-related deaths in the U.S. Per OSHA's crane rules (29 CFR 1926.1408), the crane and load have to stay at least 10 feet away from lines rated 50 kV or less, with even more clearance above that.

I once watched a crane operator lift a rental pump skid and raise the boom straight into a 7,200-volt line. No one was hurt, but the operator never ran a crane again. The job should have had a spotter, a marked exclusion zone, and a pre-lift checklist. It didn't. Since then, crane work doesn't start until I see the utility line marked on the site plan.

Step 5: Verify field power before you test a single control system

Generators are part of every pump installation. If you're running lights and hand tools, a budget Predator generator is fine. I've used one for grinders and work lights, and it did the job. But if you're powering a pump PLC, VFD, or instrumentation, pay for a proper inverter generator. The Honda generator we bring to most sites has much cleaner output than the Predator generator sitting in the job trailer.

This isn't brand snobbery. Inverter generators hold voltage and frequency stable enough for sensitive electronics. A conventional budget generator can cause the control panel to reset in the middle of a test. The first time it happened, I blamed the pump. The pump was fine. The generator was the problem.

On a recent install, I almost said yes to a cheaper generator rental to save about $150. I kept second-guessing the decision after I approved the extra cost. When the client's QA team saw the Honda generator on the equipment list, they didn't complain about price. They complained about the previous contractor who used whatever was in the truck. Quality is a brand signal. The $150 wasn't expense; it was communication.

One more note: never run a generator in a confined space or near an intake. That's not from me, that's from the CPSC and common sense. Carbon monoxide isn't a pump issue, but it's a fatal one.

Step 6: Photograph the old part before you remove it

I ordered 47 pool skimmer weir replacement parts once without checking the original profile. I was sure the radius was standard. It wasn't. $450 in parts went straight to the scrap bin, and I got to explain to the client why their pool project was delayed a week.

Replacement parts are where the checklist gets skipped. For a weir slurry pump impeller, record the serial number, the old part number, and the wear ring clearance. For a concrete weir system, photograph the crest detail and the anchor layout. For a hydraulic weir cylinder, check the rod finish and the breather before installation. For a pool skimmer weir, measure the slot width and the face angle. 'Standard' is not standard across different vintages.

So glad I now take a 'before' photo on every part removal. I've caught 11 potential mismatched parts in the last 18 months using that habit. It costs nothing and prevents the most embarrassing phone calls.

Two mistakes I still make, and how to avoid them

First, I still rush Step 1 when the project is small. A $1,200 pump order gets less data verification than a $120,000 pump order. That's exactly wrong. The failure rate is the same; the only difference is the warranty headache.

Second, I still assume everyone else in the chain has the same operating picture. They don't. The crane operator knows the lift plan, but the electrician doesn't. The generator rental guy doesn't know what the load is. Write it all down. Send it in writing. Ask each person to confirm they read it.

Take this with a grain of salt: I'm not a pump engineer, and I'm not a safety consultant. I'm someone who has made expensive mistakes and decided to write them down so you don't have to make the same ones. The checklist doesn't replace engineered drawings or qualified supervision. It just keeps the basics from getting ignored.