Import Air Side Sealing Oil Pump Hsnh440-46nz — Buy in wholesale FOB from Supplier in China

The HSNH440-46NZ is a triple-screw positive displacement pump designed specifically for air side sealing oil duty in turbine generator hydrogen sealing systems. This unit maintains oil pressure in the seal ring assembly that prevents hydrogen gas leakage from the generator casing to atmosphere. The 440 series designation indicates a medium-flow frame size within the HSNH range, with 46 referring to the nominal screw pitch and NZ denoting a specific mounting or drive configuration for power plant installation. Operating parameters, materials of construction, and performance curves for this exact model should be confirmed directly with Deyang Dongfang Yoyik Engineering.

Triple-screw pumps of this class typically employ a hardened steel power rotor with two intermeshing idler rotors running in a precision-machined cast iron or steel housing. The sealing oil application demands compatibility with mineral oil ISO VG 32 or 46 grades, with operating viscosity ranges from 20 to 100 centistokes. Standard industry practice requires suction pressure above 0.5 bar absolute to prevent screw flank contact and wear. The HSNH440-46NZ likely achieves flow rates in the 40-80 litre per minute range at 1450 or 2900 RPM with discharge pressures to 16 bar, though exact performance must be verified against the supplier's test sheet for the specific speed and oil temperature.

This pump serves thermal power plants with hydrogen-cooled generators, particularly units such as the Mundra Ultra Mega Power project referenced in the source. Buyers are typically plant engineering departments, original equipment manufacturer aftermarket teams, or specialised power sector procurement agents. The Deyang-based supplier offers this alongside a broad component range for turbine and auxiliary systems. Trade terms including exact minimum order quantity, price band, and delivery schedule require direct negotiation. The Sichuan location provides inland manufacturing with export logistics likely through Shanghai or Shenzhen ports.

Deyang Dongfang Yoyik Engineering Co., Ltd. is headquartered at Huashan Plaza in Jingyang District, Deyang City, Sichuan Province, postal code 618000. The company holds a Harbor trust tier classification. No response rate or average response time data is available, indicating limited or unrecorded buyer engagement history on this channel. The address places the firm in a major Chinese heavy equipment manufacturing region with established supply chains for power generation components.

The supplier's profile emphasises research and development investment and collaboration with domestic and international research institutions and universities. The company produces a wide array of power plant components including servo valves, solenoid valves, circulating pumps, accumulators, and sealing systems. No verified information about establishment year, factory floor area, annual output value, employee count, specific client list, or quality management certifications is present in the source data. Buyers should request business licence, ISO 9001 or API Q1 certification, and references from previous Mundra or similar ultra-mega power project deliveries directly from the supplier.