The product is a kind of middle and large double suction double screw pump with two construction forms i. E. With inbuilt bearing or bearing, and with two outfit types i. E. With or without heating chamer and safety valve. The bearing bore and pump bore of external bearing type are separated by mechanical seal and skeleton oil seal. Type and of good seal tightness. The product possesses large flux. Good at self-priming, low noise and long service life. Tecnical Data: Capacity: up to 2500m3/h Differential Pressure: up to 6.0Mpa Viscosity: 0~200,000 cSt Speed: up to 3600 rpm Temperature: up to 300 degrees Celsius Application: Oil industry: Transfer pump for various lubricating oil, crude oil, residual oil, heavy oil, pitch, diesel oil, gasoline etc. Ship building: Transfer pump for various light or heavy fuel oil, waster oil, dirty oil and sludge, oily sludge in cabin bottom, also as pressure boost pump and ballast pump. Chemical industry: Transfer various acid, alkali and salt solution, resin, glycerine paraffin wax, and cosmetics emulsion, as well as bottle filling pump. Paint industry: Deliver printing ink, pigment, various paints and coatings. Food industry: Deliver alcohol, beverage, honey, syrup, tooth paste, milk, crease, soy sauce, animal oil, vegetable oil, chocolate and other medium liquids with high viscosity. Storage&Transportation: Loading and unloading oil goods for oil pool and tanker.