Polyurethane foam products are mainly used in automotive, construction and furniture industries to as the packing of its products or from the role of shock absorption and insulation. According to the different products, polyurethane foam products offer different features in some special applications. Used in the saddle, it can be rendered as soft and flexible, while for the insulating material can be rendered as hard and durable. 
 Industry challenge 
 In order to achieve the inherent characteristics of the polyol and isocyanate must be precise mixing ratio, so that the material react with each other to form a honeycomb structure. Through the addition of catalyst, air-dried agents, colorants and other additives, manufacturers can change or strengthen the physical properties of the foam product to achieve a particular purpose. 
 Polyurethane foam quality of the product depends on the mixing ratio of the polyol and isocyanate. Improper mixing ratio will result in uneven texture of the product of poor quality. 
 Another important factor is the variety of the viscosity of the polyol and isocyanate. Polyhydroxy compounds at room temperature, high viscosity, and may contain abrasive colorants. Its viscosity reduce the ease of transmission, multi-hydroxy compounds need to be heated or pass into the nitrogen pressure at the top of the feed tank. Isocyanates viscosity is usually higher than the polyol is lower, but easy to crystallize in the damp. Special shaft seal in the pump of domestic demand in order to prevent the occurrence of such situations. 
 Zenith, Pumps solutions 
 The pumps used in polyurethane foam technology are generally positive displacement gear pump, the pump conveying high viscosity fluids at high temperature and high pressure. This high-precision pump can accurately conveying the polyol and isocyanate, in order to ensure strict mixing ratio. Zenith, Pumps pump output is smooth, no pulse, you can maintain a high degree of consistency of the fat foam production process, and the pump uses a special washing lips shaft seal to prevent the isocyanate in the shaft seal crystallization. 
 Zenith, Pumps precision metering pump specifications and types can meet the needs of most of the polyurethane production process to ensure that the exact ingredients mixed in different process conditions. 
 How to choose a polyurethane metering pump: 
 "Pump": metering pump most of the selected dosing pumps (gear metering pumps), the measurement of high accuracy requirements should be used in low-speed high-precision, high pressure, high temperature of the gear pump (pump speed is low on the manufacturing precision of the required pump high, or leakage of fluids and measurement of the elephant, such as a conventional gear pump does not work when speed <50r/min). Zentih polyurethane pump speed range 1 to 250 r / min adjustable, prolong life and improve sealing speed is low. The accuracy of the measurement is not only determined by the metering pump, 
 Buy polyurethane pump, air tightness, no leakage "high precision" pulse "," repeat performance "is an important consideration indicators. 
 Zenith Pumps polyurethane pump how to do the "high precision", "no pulse", "repeat performance" 
 Rational design of: 
 From the rationality of the design: the pump has only three moving parts, the main drive shaft, drive gear, driven gear (no bearings, bushings). 
 "Repeat performance" 
 Two gears and shafts hardened, hardness up to Rc54, to ensure a good wear resistance, long-term use also can achieve high precision. 
 "High precision" 
 Must reach a certain high precision, high volumetric efficiency of the pump must be done, how to achieve high volumetric efficiency? 
 Rationality of the design must first be re-processing of high precision, Zenith, Pumps polyurethane pump (B-9000 series of 2.4 ml / rotation for example) of gear and cavity gap of 0.005 inch, but at the same time after hardening to ensure that in 340 degrees Celsius, not due to thermal expansion and contraction of the physical properties of the gear expansion card dead. 
 Output pulse " 
 Zenith, Pumps polyurethane pump (B-9000 series of 2.4 ml / rev for example) to 2.4 ml 360-degree turn, the two gears, the number of teeth of each gear 27, which means that 2.4 ml assigned to the two gear 54 gear groove. Here, the output can be achieved without pulse, the displacement must, gear more, on a very small pulse. Can be negligible. Of course, the same with the rationality of the internal structure of the polyurethane pump. 
 Tightness, no leakage 
 Zenith, Pumps polyurethane pump seal lips, can do no leakage, air tightness. 
 Polyurethane metering pump series: Universal 
 Polyurethane metering pump material: universal type 400 stainless steel manufacturing 
 Polyurethane metering pump flow: Displacement (cc / rev): 0.05 | 0.3 | 0.6 | 1.2 | 2.4 | 4.5 | 9.0 | 15 | 30 | 45 | 90 
 Polyurethane metering pump speed range: 0.05 to 30 ml / transfer up to 500 rpm; 45 and 90 ml / transfer up to 300 rpm 
 The polyurethane Metering Pump viscosity range: 1CPS ~ 500,000 cps. 
 Polyurethane metering pump flow range: up to 27,000 ml / rev. 
 Polyurethane metering pump inlet pressure: 20 kg (300PSI) Highest 
 Polyurethane metering pump outlet pressure: 70 kg (1000PSI) Highest 
 Polyurethane metering pump pressure drop: 20 to 1000PSI (depending on viscosity) 
 Polyurethane metering pump temperature: minus 18 degrees minimum, 205 degrees (magnetic couplings seal), 340 (depending on the shaft seal material) 
 Polyurethane metering pump seal: mechanical seals, lip seals, packing seals, magnetic couplings seal 
 Product samples call for further details, my company can also download the zenith the pump has a 80-year history of the production of precision metering gear metering pumps, 
 MonyPumps --- fluid precision measurement consultant