Pump Metal-Wound Gasket HZB253-640-03-24: Fortifying Power Station Sealing Safety

The HZB253-640-03-24 Booster Pump Casing Gland Metal-Wound Gasket, specifically engineered for core equipment in power plant boiler feedwater systems, is now in widespread use across major power stations. As the "critical sealing component" for the HZB253-640 model pre-pump, this product precisely addresses media leakage during pump operation. When paired with complementary components, it forms a complete sealing system, guaranteeing the stable operation of power plant equipment and establishing itself as a preferred spare part for plant overhauls.

I. Product Overview: The Sealing Core and Synergistic Component System

The HZB253-640-03-24 wound gasket is an exclusive sealing spare for the HZB253-640 pre-pump. Its primary role is to seal the critical interface between the pump gland and the pump casing, directly impacting leak control within the boiler feedwater system. The product utilizes 06Cr19Ni10 (304 Stainless Steel) metal tape as its core structure, filled with flexible graphite material. It strictly adheres to the technical standards set out in the pre-pump maintenance manual and undergoes triple inspection for compression resistance, temperature tolerance, and sealing performance, ensuring compatibility with the power station's high-temperature, high-pressure operating conditions.

To achieve optimal sealing efficacy, this wound gasket must work synergistically with several other components of the HZB253-640 pre-pump, as detailed in the table below:

The material selection and dimensioning of this wound gasket are custom-tailored for the HZB253-640 booster pump, allowing for direct replacement of older seals without requiring any modification to the pump casing structure.

II. Technical Features and Advantages: Directly Addressing Power Plant Pain Points

(A) Strong Material Weathering Resistance Extends Overhaul Cycles

During operation, power station pre-pumps must withstand high temperatures, pressures exceeding 1.6 MPa, and media containing trace corrosive impurities. The 304 stainless steel core of this wound gasket resists media corrosion and high-temperature oxidation, while the flexible graphite filler provides superior resilience. Even if the pump casing experiences displacement of up to 0.1 mm due to vibration, the gasket maintains tight adherence to the sealing face, preventing leaks. Compared to standard rubber gaskets, this product boasts a longer service life, potentially reducing overall power plant operational costs. Stop frequent shutdowns! Contact Dongfang SRI today to upgrade your seals and slash maintenance costs.

(B) Precise Fit Design Boosts Maintenance Efficiency

The product is manufactured strictly according to the HZB253-640 booster pump sealing groove dimensions, with dimensional tolerances controlled within ±0.05 mm. Installation requires no additional processing steps like grinding or cutting. Maintenance personnel need only remove the pump gland securing bolts to directly replace the old gasket, often synchronously replacing fragile parts like O-rings and other seals. This significantly speeds up the return of the equipment to service.

(C) Wide Operating Range Ensures Stable Performance

Whether facing pressure surges during pre-pump start-up, sustained high temperatures during full-load operation, or rapid temperature drops during shutdown, this wound gasket maintains stable sealing performance. Multiple simulated power station operating tests have shown that across a temperature range of -20°C to 250°C and a pressure range of 0 to 2.5 MPa, the sealing leakage rate consistently remains below 0.01 mL/min, which is significantly better than industry standards. This ensures the gasket collaborates with components like the impeller and shaft sleeve to guarantee the pump's long-term stable operation.

III. Application Scenarios: Covering the Full Power Plant Lifecycle

(A) Routine Maintenance: Proactive Leak Prevention

During the daily equipment inspections at the power station, personnel can check the pump gland sealing area for any signs of media residue to assess the gasket's condition. If slight seepage is detected, this gasket can be promptly replaced, and the associated boiler feedwater pump gaskets and O-rings can be checked for aging. This practice prevents minor issues from escalating into major trip faults, ensuring uninterrupted water supply from the pre-pump.

(B) Major Overhaul Operations: Complete Sealing Restoration

During the pre-pump major overhaul, typically conducted every 1–2 years, the HZB253-640-03-24 wound gasket is a mandatory replacement spare. Technicians dismantle the pump body, replace worn components (impeller, shaft sleeve), and simultaneously replace all sealing parts, including this gasket. This establishment of a brand-new sealing system thoroughly resolves accumulated sealing gaps and material aging issues, laying the foundation for the pre-pump's continued stable service.

(C) Emergency Repairs: Minimizing Downtime Losses

If the pre-pump experiences a severe leak due to gasket failure, Dongfang SRI can respond to the power plant's request and deliver qualified products fastly, including repair the pump gland, replace the wound gasket, and tighten the locking components. Need seals fast? Call Dongfang SRI now for emergency spares delivery.