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| http://www.china-vacuum-pumps.com/vac/roots-vacuum-pumps.htm Roots Vacuum Pumps Operating Principle and Features: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant speed inside the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in certain relative positions. They are near to one another and to the housing without actual contacting, so lubrication is unnecessary in the working housing. The carefully balanced operating parts and high precision bevel wheels ensue the pump be operated stably and continuously under the condition of high-pressure difference. Dynamic seal part use our patent technology and imported oil seals, the vibration amount of shaft on the shaft seals is controlled to less than 0.02mm. A gravity valve is installed between the suction and exhaust part of the pump. The function of the gravity valve is as follows, when the pressure difference between the suction and exhaust part is over the weight of the valve, the valve opens automatically, which makes the pressure difference always keep in a fixed controllable value, the value is the allowable highest pressure difference to ensure the pump work normally and so that in fact, the roots vacuum pump with overflow valve is a kind of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially higher speed at relatively lower inlet pressure and it is possessed overload self-protective function. Because it is a pump of dry clearance seal construction, if a certain pumping speed rate and an ultimate vacuum need to be obtained, it is necessary to supply a lower inlet pressure for reducing the back flow, therefore, a pump must be backed in use, roots vacuum pump should be started soom after its inlet pressure reaches a permissible value for economization. It is permit to select different kinds of pump as the backing pump for factual requirements, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing large amount of vapor, the liquid ring vacuum pump is the ideal backing pump. SYF-150 SYF-300 SYF-600 SYF-1200(Patent Product) ZJP-1800(Patent Product) ZJP-2500(Patent Product) Performance Parameter: Model Ultimate Pressure Pumping Speed Pressure Diff.at Overflow Valve Inlet Diam. Outlet Diam. Motor Power Recommended Backing Pump Cooling Water Consumption Weight (Pa) (L/S) (Hpa) (mm) (mm) (Kw) (L/min) (Kg) SYF-30 30-2 30 52 50 40 0.75 2H-8 / 85 SYF-70 30-2 70 52 80 50 1.1 2H-15 / 110 SYF-70D 30-2 70 48 100 100 1.5 2H-15 20 220 SYF-150 30-2 150 48 100 100 2.2 2H-30 25 220 SYF-300 30-2 300 58 150 150 4 2X-70,2H-70 30 310 SYF-600 50-2 600 32 200 200 7.5 H-150,HGL-150 35 790 SYF-1200 50-2 1200 44 250 200 11 H-150,HGL-150 40 950 ZJP-1800 50-2 1800 32 250 250&200 15 2-HG150,ZJP600/HG150 50 1200 ZJP-2500 50-2 2500 44 320 320&250 18.5 2-HG150,ZJP600/HG150 60 1500 Series ZJ-150A Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-150A 50-2 3.70-4 150 100/100 803 75 2.2 2H-30A Series ZJ-300 Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-300 50-2 3.70-4 300 150/150 603 45 4 2H-70A 10-1 80-4 H-70B Series ZJ-600 Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-600 50-2 3.70-4 600 250/150 4.503 40 7.5 2H-70A 10-1 80-4 H-150 Series ZJ-1200B Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-1200B 10-1 80-4 1200 250/200 403 30 11 H-150 50-2 3.70-4 ZJ300/2H-70A Series ZJ-5000 Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-5000 50-2 3.70-4 5000 400/320 303 22.5 45 ZJ1200/H-300 Series ZJ-10000 Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-10000 50-2 3.70-4 10000 500/400 2.503 19 55 ZJ1200/H-300 Series ZJ-20000 Roots Vacuum Pumps Model Uitimate Pumping Inlet/Outlet Dia(mm) Max.Permiss able Diff.Pressure Motor Power（kw） Recom-ended Backing Pump Pressure speed(l/s) Pa Torr Pa Torr ZJ-20000 50-2 3.70-4 20000 630/500 203 15 75 ZJ5000/ZJ1200/H-150 Series ZJP-30A Roots Vacuum Pumps Model Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Value Inlet/Outlet Dia. Motor Power(kw) Recomm-ended Backing pumps pa Torr pa Torr (mm) ZJP-30A 5/10-2 3.7/10-4 30 4/103 30 50/40 0.75 2H-8 Series ZJP-70A Roots Vacuum Pumps Model Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Value Inlet/Outlet Dia.(mm) Motor Power(Kw) Recomm-ended Backing pumps pa Torr pa Torr ZJP-70A 5/10-2 3.7/10-4 70 4/103 30 80/50 1.1 2H-15 Series ZJP-150 Roots Vacuum Pumps Moter Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Value Inlet/Outlet Dia.(mm) Motor Power（kw） Recomm-ended Backing pumps pa Torr pa Torr ZJP-150 50-2 3.70-4 150 403 30 100/100 2.2 2H-15,2H-30A Series ZJP-300 Roots Vacuum Pumps Model Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Value Inlet/Outlet Dia.(mm) Motor Power（kw） Recomm-ended Backing pumps pa Torr pa Torr ZJP-300 50-2 3.70-4 300 403 30 150/150 4 2H-30A,2H-70A Series ZJP-600 Roots Vacuum Pumps Model Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Value Inlet/Outlet Dia. Motor Power（kw） Recomm-ended Backing pumps pa Torr pa Torr (mm) ZJP-600 50-2 3.70-4 600 2.703 20 200/200 7.5 2H-70A Series ZJP-1200B Roots Vacuum Pumps Model Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Val Inlet/Outlet Dia. Motor Power（kw） Recomm-ended Backing pumps pa Torr pa Torr (mm) ZJP-1200B 50-2 3.70-4 1200 2.703 20 250/200 11 ZJ300/H-70B Series ZJP-2500 Roots Vacuum Pumps Model Uitimate Pressure Pumping speed(L/S) Diff.Permiss at overflow Value Inlet/Outlet Dia. Motor Power（kw） Recomm-ended Backing pumps pa Torr pa Torr (mm) ZJP-2500 50-2 3.70-4 2500 2.703 20 320/320 22 ZJ600/H-150 FAQ： 1.CAN YOU DO CUSTOMIZED PRODUCTS? Yes,we are mainly doing customized products according to the customers’ drawings or samples. 2.HOW MANY EMPLOYEES OF YOUR COMANY?WHAT ABOUT THE TECHNICISTS? We now have more than 650 employees, including 10 engineers and 50 technicians. 3.HOW TO DELIVER THE GOODS TO US? Usually we will ship the goods to you by sea,because we are in Ningbo,and we are only 35 kilometers away from the Ningbo Port,it is very convenient and efficient to ship goods to any other countries.Of course,if your goods are very urgent,the Ningbo Airport and Shanghai Airport are also very nearby. Vacuum Pumps factory website:http://www.gear-sprocket.com/vacuum-pumps/ |
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