Founded in 1998, Hongpai Pumps Co., Ltd. is the metering pump manufacturer and designer of pumps, garden machine, compressor and pump accessories. We have become the long-term metering pumps supplier of world-class retailers such as OBI, B&Q, METRO, BAUHAUS, LEROY MERLIN, CANADIAN TIRE, etc. Registered with ISO9001: 2000 quality management certification, we always go on improving its quality control system. Besides, 6S management was strictly applied. A great sum was invested in advanced machinery and testing facilities. With most components home made, quality is better controlled here. GS, CE, UL, ETL, CB, EMC & EMF certificates guarantee received products to be high quality for customers.

Variable Oil By-pass stroke adjustment allows better valve performance than variable linkage designs. The valve checks have extra time to seat even in heavy liquids since they are idle during the by-pass portion of the suction and discharge strokes.EZE-CLEAN Valves–Cartridges can be removed for cleaning without disturbing the piping to the pump.All Neptune "dia-Pumps" are adjustable from 10% through 100% of capacity by micrometer dial.Neptune "dia-Pumps" are available in the following materials of construction:
Cast Iron with 316SS Trim
316SS ? PVC ? Alloy 20 ? Kynar
Standard "dia-Pump" Simplex Only
Simplex capacities from 1 gph (3.7 lph) to 18 gph (68 lph)
Pressures to 1100 psi (77 kg/cm2)

Now new generation high caliber DUPRO Dosing Pumps, Metering Pumps, Dosing Systems, High Pressure Triplex Pumps & high pressure washing and cleaning Packages available for serve you in better way.
Dupro pumps applied for operation such as a dosing, metering, injection, feed, proportioning. Dupro pumps are designed to deliver flow streams at adjustable & controlled rates. Dupro pumps are also utilised for I ) In high pressure system ii) Where low flow rates in ml or ltr/HR required iii) flow proportioning iv ) to handle various fluid ( viscous, slurries, corrosive, hazardous, radioactive, abrasive, toxic, melts, gases, foams, bio - carb, yeast, food ) and numerous other uses.
Dupro pumps produce in the under strict quality control and ensure good engineering. DUPRO pumps can be provided with plunger as well as single, double hydraulically or mechanical flex diaphragm, covering the capacity range from 100 ml/HR to 14,000 lph and discharge pressure up to 1000 KG/sq. Cm. Dupro pumps crafted from various materials like SS 304/316, Alloy 20, Hastelloy C & B, Monel, Inconel, Polypropylene, PTFE, PVC and UHMWPE depending up on the nature of the liquid to be handled.

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