Product Name: Haisun Marine Hydraulic Power Blocks (BTW1) Model NO.: BTW1 Condition: New Certification: ISO9001:2008 Fishing Gear Winch Type: Fishing Machinery Harvesting Machinery Type: Fishing Winch Power Source: Hydraulic Type: Fisheries Auxiliary Machinery Material: Al Alloy,Ship/Ss Trademark: HAISUN Transport Package: Iron Box Packing Specification: ISO9001 Origin: Weifang Shandong Product Description With many years practice and experience, Haisun power block continues improve and now almost perfect. The main components are made of high quality aluminum alloy which makes the product light weight, high strength and corrosion resistance. The power block uses hydraulic drive and the speed can be adjusted continuously. It is the ideal choice modern seiner hauling and network operation.Haisun has worked to develop a vulcanizing process, which ensures that the rubber on the sheaves lasts long and wears evenly. Furthermore, the 20" 24" 29" 33" 36"& 38"42"blocks have the option of rubber vulcanized aluminum sheaves or aluminum sheaves with some ribbed aluminum type "A" .Another option that is available for blocks of 24",33" and larger is a hydraulically activated press wheel system to provide smoother and more efficient handling of the net.Haisun Power Block Main Technical ParametersBTW1-20(Al alloy)--Sheave Diameter 508mm;Flow 12GPM;Pull 882kgs;Weight 125kgs.BTW1-24AO(Al alloy)--Sheave Diameter 610mm;Flow 18GPM;Pull 1860kgs;Weight 185kgs.BTW1-29(Al alloy)--Sheave Diameter 736mm;Flow 24GPM;Pull 2146kgs;Weight 225kgs.BTW1-29A(Al alloy)--Sheave Diameter 736mm;Flow 24GPM;Pull 2146kgs;Weight 225kgs.BTW1-33AG(Al alloy)--Sheave Diameter 838mm;Flow 42GPM;Pull 2986kgs;Weight 570kgs.BTW1-36F(Al alloy)--Sheave Diameter 914.4mm;Flow 45GPM;Pull 4306kgs;Weight 720kgs.BTW1-36(Al alloy)--Sheave Diameter 850mm;Flow 48GPM;Pull 2986kgs;Weight 570kgs.BTW1-38A(Al alloy)--Sheave Diameter 1320mm;Flow 60GPM;Pull 6000kgs;Weight 665kgs.BTW1-42A(Al alloy)--Sheave Diameter 1067mm;Flow 90GPM;Pull 7000kgs;Weight 980kgs.BTW1-47A(Al alloy)--Sheave Diameter 1200mm;Flow 110GPM;Pull 8000kgs;Weight 1200kgs.BTW1-56A(Ship/SS)--Sheave Diameter 1426mm;Flow 160GPM;Pull 9700kgs;Weight 2600kgs.BTW1-56A1(Ship/SS)--Sheave Diameter 1426mm;Flow 170GPM;Pull 12000kgs;Weight 2650kgs.BTW1-78A(Ship/SS)--Sheave Diameter 1995mm;Flow 180GPM;Pull 13000kgs;Weight 4500kgs.