Professional Sealin Products Manufacturer

Chemical plants process aggressive acids, solvents, and caustic media that destroy conventional elastomer seals within weeks. Yongbang addresses this with non-metallic SiC cartridge seals, PTFE bellows designs, and metal bellows seals that eliminate dynamic O-rings entirely. Our O-ring-free bellows technology removes the primary cause of chemical seal failure, while modular configurations allow quick adaptation to Richter, Flowserve Polychem, and other chemical-duty pump platforms. For hazardous media, our dual seal arrangements with barrier fluid systems provide a reliable secondary containment layer that meets TA-Luft emission requirements.

Municipal and industrial water systems demand reliable, low-maintenance seals across hundreds of pumps operating around the clock. Yongbang provides elastomer bellows seals, single cartridge seals, and complete submersible pump seal replacements for Flygt, Grinde, Emu, ABS, and Hidrostal pump brands. Our Flygt-compatible ASI series covers the full 2600 through 7100 pump range with direct drop-in installation and no pump modification required. With tungsten carbide faces and FKM elastomers as standard, our seals deliver extended service life in clean water, recycled water, and sewage applications while keeping distributor inventory simple.

Boiler feed pumps, condensate pumps, and cooling water systems in power plants operate under sustained high pressure, elevated temperature, and low-lubricity feed water conditions. Yongbang offers high-pressure cartridge seals rated up to 150 bar with DiamondFace-coated seal faces that resist electrochemical corrosion — a common failure mode in feed water pumps running above 35 m/s circumferential velocity. Our stationary spring-loaded designs with shrink-fitted bellows compensate for thermal expansion and shaft deflection, delivering operating periods exceeding 40,000 hours across fossil, combined-cycle, and nuclear power plants.

Pulp and paper mills present a uniquely challenging sealing environment: abrasive fiber suspensions, high-consistency stock, and continuous 24/7 operation with minimal maintenance windows. Yongbang manufactures screen and sorter seals for Voith, Andritz, Valmet, and Hooper equipment, along with heavy-duty split seals that allow field replacement without disassembling the machine. Our stationary spring designs prevent fiber clogging, and silicon carbide faces resist the constant abrasion of cellulose fiber media. For double seal applications, recirculation sleeves ensure buffer water reaches seal faces before machine startup, significantly reducing dry-running wear.

Hygienic industries require seals that withstand CIP/SIP sterilization cycles, prevent product contamination, and comply with FDA and ATEX standards. Yongbang provides mixer, agitator, and reactor seals with polished wetted surfaces and dead-space-free geometry that meets DIN 28138 vessel standards. Our dry-running gas-lubricated designs eliminate barrier fluid contact with the product, maintaining batch purity in sterile fermentation, tablet coating, and aseptic filling processes. Available with integrated bearings for long overhung shafts, our vessel seals serve both steel and glass-lined reactors across pharmaceutical, dairy, brewing, and fine chemical applications.

Mining operations subject pump seals to extreme abrasion from sand,ite, and mineral slurry with solids content exceeding 10%. Yongbang engineers advanced slurry seals with flexible stationary components that prevent abrasive particles from entering critical sealing zones, protecting O-rings and spring elements from premature failure. Our radially split seals enable rapid on-site replacement on large slurry pumps without full disassembly, cutting maintenance downtime from days to hours. With tungsten carbide versus tungsten carbide face combinations and progressive cavity pump seals covering over 1,500 PCP designs for Mono, Netzsch, and Seepex equipment, we deliver proven durability in the harshest mineral processing conditions.

From HVAC chillers and textile dyeing machines to steel mills and plastic extruders, general industrial equipment relies on versatile seals that adapt to diverse media, speeds, and temperatures. Yongbang offers over 10 million modular seal configurations spanning shaft sizes from 10mm to 300mm, pressures up to 25 bar, and temperatures from -40°C to +220°C. Our component seals and cartridge seals provide verified cross-reference compatibility with John Crane, Burgmann, Flowserve, and AES product lines, enabling distributors to consolidate their seal sourcing with one manufacturer while covering the widest possible range of rotating equipment applications.