Railway cast Iron pump cover is core sealing components designed specifically for railway vehicles (such as diesel locomotives, electric locomotives, and EMUs) and railway infrastructure (such as maintenance bases and station water supply systems). Made from high-strength gray cast iron (HT250/HT300) or ductile iron (QT450) through a precision casting process, they offer excellent pressure resistance, 耐食性, and shock absorption. These covers strictly adhere to international railway industry standards (ENなど 15085 そしてアイリス) and are suitable for critical equipment such as fuel pumps, cooling water pumps, and hydraulic pumps. They effectively prevent media leakage, protect internal components, and ensure stable operation of railway systems under complex operating conditions.
Railway Cast Iron Pump Cover
Technical Parameters of Railway Cast Iron Pump Cover
パラメータ
Detailed Specifications
材料
Gray cast iron (HT250/HT300), ダクタイル鋳鉄 (QT450)
Applicable Media
Fuel, lubricating oil, coolant, 作動油, 水, and mildly corrosive liquids
Operating Pressure Range
0.6-4.0 MPa (High-pressure models up to 10 MPa available on request)
Operating Temperature Range
-40°C to +200°C (extended to +250°C for special conditions)
Seal Type
Mechanical seal, O-ring seal, packing seal (optional depending on operating conditions)
The spheroidized cast iron (QT450) increases its tensile strength by 30%, allowing it to withstand railway vibration and high-pressure media circulation, reducing the risk of deformation.
An optimized internal rib design enhances the pump cover’s rigidity and prevents fatigue cracking caused by pressure fluctuations.
Excellent Sealing Performance
An integrated double mechanical seal achieves a dynamic leakage rate of ≤0.5 mL/h, meeting railway safety standards (such as GB/T 34571-2017).
A pre-designed quick-change seal slot allows maintenance without disassembling the pump body, minimizing downtime.
Environmental Adaptability
The surface coating has passed the salt spray test (≥1000 hours), making it suitable for coastal, high-humidity, or industrially polluted environments.
The low-temperature model utilizes an antifreeze formula to ensure seal flexibility at -40°C, preventing brittle fracture.
Lightweight and Modular Design
The ductile iron model is 15% lighter than traditional gray cast iron, reducing train energy consumption.
Standardized flange interfaces enable interchangeability between pump bodies from multiple brands, simplifying spare parts management.
Application of Railway Cast Iron Pump Cover
Diesel and Electric Locomotives
Fuel Pump Cover: Seals diesel or gas to prevent leakage into high-temperature engine areas, suitable for models such as GE and Siemens.
Cooling Water Pump Cover: Protects the water pump from corrosion caused by ethylene glycol coolant, withstanding temperature cycles from -40°C to +120°C.
Hydraulic Pump Cover: Used in the braking system or pantograph lifting mechanism, ensures zero hydraulic oil leakage to maintain system pressure.
EMU and Urban Rail Transit Vehicles
Main Cooling Pump Cover: Integrated exhaust valve design balances steam pressure during high-speed operation, preventing cavitation damage.
Air Conditioning System Water Pump Cover: Features a food-grade coating to meet train drinking water transport hygiene standards.
Railway Infrastructure and Maintenance Bases
Lubricating Oil Pump Cover: Used in equipment maintenance stations, withstands frequent starts and stops and the impact of high-pressure lubricating oil.