Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

Tianjin Uranus Hydraulic Machinery Co., Ltd. provides custom hydraulic cylinders for the renewable natural gas and biogas industry, including digesters, gas compressors, and feedstock handling equipment. As a national small giant enterprise with over 30 years of hydraulic experience, we design cylinders that resist corrosion from organic acids and hydrogen sulfide, and that can operate in potentially explosive atmospheres (ATEX certified). Our custom cylinders for anaerobic digesters are used for mixing and for feeding feedstock. These cylinders must withstand the corrosive environment inside the digester. We use stainless steel 316L for the rod and cylinder body, and the seals are made from Viton or a special compound resistant to biogas components. For a German biogas plant, we supplied a custom mixing cylinder with a bore of 80 mm and a stroke of 1,200 mm, operating at 160 bar. The cylinder is ATEX-certified for Zone 2 and has been in operation for over 5 years. For feedstock handling (e.g., feeding straw or manure), we provide custom cylinders for pushers and guillotine gates. These cylinders are exposed to abrasive and corrosive material. We use hard chrome-plated rods, heavy-duty wipers, and optional rod boots. For a US-based biogas producer, we supplied custom pusher cylinders for a feedstock hopper. The cylinders have a bore of 100 mm and a stroke of 1,500 mm, and they have achieved a service life of over 1 million cycles. For gas compression systems, we provide custom cylinders for reciprocating compressors that boost biogas to pipeline pressure. These cylinders must handle high pressures (up to 300 bar) and have very low leakage to prevent methane escape. We use precision-machined components, labyrinth seals or non-lubricated piston rings, and we offer integrated leak detection ports. For a Swiss biogas upgrading plant, we supplied a custom compressor cylinder with a bore of 200 mm and a stroke of 400 mm. The cylinder is made from nodular cast iron with a special bore finish and has been operating for over 4 years without maintenance. Our manufacturing process includes material verification, NDT of critical areas, and pressure testing with helium for leak detection. We provide ATEX compliance documentation and a detailed test report. For a custom cylinder for your biogas or renewable natural gas application and a quote, please contact us.