Product Description
Product Description
open flexible centrifugal cast iron water pump impeller/blower impeller 1. Open impeller As its name suggests, an open impeller has vanes that are open on both sides without any protective shroud. As they don’t have any support either side they tend to be weaker, and therefore are typically used in smaller, inexpensive pumps that aren’t operated under significant strain. Whilst they are able to handle a degree of solid content unlike closed impellers, they require a higher NPSH to operate without cavitation, damage and loss of efficiency. 2. Semi-open impellerSemi-open impellers have a back-wall shroud that adds mechanical strength to the vanes, whilst remaining open on the other side. They are somewhat of a middle ground between open and closed impellers in terms of efficiency and NPSHr, making them suited to medium sized pumps with a small amount of soft solids. It’s important to note with semi-open impellers that the clearance between the vanes and the pump casing needs to be small, as if too large slippage and recirculation will occur.3. Closed impeller Now you’ve read about the open and semi-open impellers, you can probably guess that a closed impeller has enclosed at the back and front, providing maximum strength. They have a low NPSH required and provide a more efficient flow. However they are a more complicated, expensive design due to their reliance on close-clearance wear rings to reduce axial loads and help maintain efficiency. They are the most popular impeller for large pumps transferring clean liquid as they are prone to clogging when in contact with solids. Product Description weight 1-300kgdiameter 100-500mmpainting OEM1. PRODUCT SPECIFICATIONS1Materialcast iron, grey iron, ductile iron, steel, stainless steel, brass,copper, aluminum, zinc etc. 2Processsand casting, precision casting, investment casting, lost wax casting, die casting, forging, stamping, machining etc.3Machinelathe, CNC, drilling machine, milling machine, boring machine, planting machine, machining center etc.4Tolerancecasting:0.5mm, machining:0.05mm, finish machining:0.005mm5Capacitymax diameter:1M, max weight:200KG6Surface treatmentpowder coating, painting, spraying, galvanization7StandardJIS, ANSI, DIN, BS, GB 2. INFORMATION ABOUT USCompanymanufacturer (more than 20 years' experienced factory)exporter (export from 2005 year)Main export markets• Eastern Europe• Western Europe• North America• Mid East Africa• Central/South America• Asia• Australialong-term cooperated customer:Italy,Germany,Spain,Australia etc.Company advantage• Guarantee/warranty• Product feature• Product performance• Prompt delivery• Quality approval• Service• Small order accepted 3. WHY CHOOSE US?• Good in quality and price in moderate • Strict quality control system • ISO9001:2008 certification• OEM/ODM service offered • Small order accepted• If there is any thing I can do for you, please don't hesitate to contact with me. I will be always at your servie.Company Information Dalian ruici industrial co. LTDFounded in 2005, the company was founded in 1984.Is a specialized in metal products manufacturing enterprises.It mainly produces the OED and ODM products according to customer's requirements. We mainly engaged in steel, stainless steel, copper, aluminum and zinc alloy products casting, forging, stamping and machining.Application fields include: petrochemical, engineering, Marine industry castings: such as impeller, pump, valve, floor drain, flange;Transmission machinery parts;Kitchen and food industry castings;Auto parts;Agricultural machinery parts, etc.Certification FAQQ1. What is your payment term? A: T/T 30% down payment, balance to be paid before shipment. or L/C. Q2: What is your main market?A: Western Europe, North America, Janpan,, Q3: Can I get samples from your factory?A: Yes, sample is free, but the express charge is yours. Q4: If products have some quality problem, how would you deal with?A: We will responsible for all the quality problems.Q5.Are you manufacturer or trading company?A.We are manufacture(cast iron) and trade company. Q6. what’s the payment term? A. We accept T/T, L/C,WESTERN UNION Q7. What’s the delivery time ? Pattern needs 30-60 days, sample need 30-50 days. The first order need 60 daysQ8. What is the standard of package? A. Export standard package or special package according to customer requirement. Q9. Do you accept OEM business?A. Yes, we are OEM supplier. Q10. what kind of certificate you have ? A .We have ISO9001, ISO14001,PED
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