Pilot Valve Troubleshooting: Why Your Yamada NDP Pump Is Cycling Unevenly
Pilot Valve Troubleshooting: Why Your Yamada NDP Pump Is Cycling Unevenly The pilot valves inside a Yamada NDP pump may be small, but they play an important role in the pump’s cycling performance. As the diaphragms reach the end of each stroke, an inner center disk slightly depresses a pilot valve. This creates the pressure…
Read MorePneumatic (air‑operated) pumps for oil applications
For pumping oil with a pneumatic pump, the most common and reliable choice is an air‑operated double diaphragm (AODD) pump—especially for transfer, unloading, sump/containment, and dirty oil services. In the Yamada lineup, this is typically the NDP Series (our flagship industrial AODD family). https://www.yamadapump.com/ndp-series/ Why an air‑operated pump is a good fit for oil Yamada…
Read MoreAir-powered oil transfer pump applications
Yamada air-operated double diaphragm (AODD) pumps are commonly used for oil transfer because they’re self-priming, can run dry, handle varying viscosities, and are safe in hazardous/explosion-proof environments when properly configured. The NDP Series is the go-to general industrial choice for most oil-transfer duties. https://www.yamadapump.com/ndp-series/ Common application areas Bulk oil unloading & transfer Offloading from drums,…
Read MoreIndustrial sludge pump applications
Industrial sludge is usually a mix of water + solids + sometimes oils/chemicals, and it can range from thin “muddy water” to thick, abrasive slurry. Yamada air-operated double diaphragm (AODD) pumps—especially the NDP Series—are widely used here because they’re self-priming, dry-run capable, pass solids, and tolerate variable consistency better than many pump types. https://www.yamadapump.com/ndp-series/ Common…
Read MoreWaste Oil Pumps and Dispensers applications
Yamada air-operated double diaphragm (AODD) pumps—most commonly from our NDP Series—are widely used as waste oil evacuation pumps and as the pumping source for waste oil dispensing/transfer systems in automotive, fleet, industrial maintenance, and lube operations. They’re popular because they’re air-powered (no electric motor at the pump), self-priming, dry-run capable, and tolerant of varying oil…
Read MoreChoosing the right “rubber” (elastomer) for a Yamada diaphragm pump
In an AODD pump, the elastomer selection typically covers the diaphragms, ball checks, valve seats (sometimes), and O-rings. The “right rubber” is the one that best fits your chemical, temperature, and duty cycle, while meeting any abrasion or food-contact requirements. Step-by-step selection process 1) Identify exactly what’s being pumped Chemical name(s) and concentration (%) Temperature…
Read MoreWhat is a high-pressure diaphragm pump, and how does it work?
A high-pressure diaphragm pump is a positive-displacement pump built to move liquid against higher discharge pressures by repeatedly flexing diaphragms to create suction and discharge strokes; in Yamada air-operated double diaphragm (AODD) designs, compressed air is alternately directed by the air valve to each side of the pump, pushing one diaphragm while the other returns,…
Read MoreWhat are CSA, ATEX, and UL certifications for diaphragm pumps?
CSA, ATEX, and UL are third‑party certification frameworks that indicate a diaphragm pump (or its accessories) meets defined safety requirements: CSA (Canadian Standards Association) and UL (Underwriters Laboratories) are North American safety certifications commonly applied to electrical/control components used with pumps (such as solenoid valves, sensors, controllers, or packaged systems), while ATEX is the European…
Read MoreWhat is electropolishing, and how does it improve stainless steel diaphragm pumps?
Electropolishing is an electrochemical finishing process that removes a very thin, controlled layer of metal from stainless steel surfaces, effectively “micro-smoothing” and cleaning the wetted areas; on stainless steel diaphragm pump liquid ends, this can reduce surface roughness and microscopic peaks/valleys where product can cling, helping improve cleanability, reduce product hold-up, and lower the risk…
Read MoreWhat is a wastewater and sludge transfer pump?
A wastewater and sludge transfer pump is a pump designed to move dirty water, solids-laden liquids, and thick slurries (sludge) reliably without clogging, excessive wear, or losing prime—common in municipal and industrial treatment systems for tasks like moving waste streams, transferring sludge between tanks, feeding filter presses, or handling dewatered slurry. In the Yamada lineup,…
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