Key Features

• Absolute Containment & Zero Emissions: The dual pressurized seal arrangement (API 682 Arrangement 3) ensures the caustic process fluid is completely contained. The barrier fluid is maintained at a higher pressure than the process, creating a positive inward flow that prevents any caustic leakage, protecting personnel and the environment.

• Prevents Crystallization & Clogging: Caustic solutions readily crystallize upon exposure to air. The double acting mechanical seal's pressurized barrier fluid flushes the outer seal chamber, preventing airborne CO2 from ingressing and forming carbonate crystals that would jam a standard single seal. The clean barrier fluid also provides optimal lubrication.

• Corrosion-Resistant Construction: All wetted and atmospheric-side components are crafted from high-grade corrosion-resistant alloys like Ni-Resist, Duplex Stainless Steel (2205/2507), or Hastelloy. Secondary seals utilize advanced perfluoroelastomers (FFKM) or PTFE to withstand the aggressive nature of hot, concentrated caustics.

• Foolproof Cartridge Reliability: Supplied as a complete, pre-set cartridge unit. This eliminates critical installation errors in spring setting and face alignment—common causes of early seal failure. Installation is simplified to "remove and replace," drastically reducing downtime and skill requirements.

• Integrated Monitoring & Safety: The double acting mechanical seal supports standard API piping plans (Plan 53/54). The barrier fluid system includes pressure gauges and level switches that provide immediate visual indication of inner seal failure, allowing for planned, safe shutdown and maintenance before any process leak occurs..

Manufacturer Advantages

Specialized Material Science Expertise: MIAOYU possesses deep knowledge in selecting and qualifying materials for caustic service. We understand the nuances of stress corrosion cracking (SCC) in alkalis and select optimal metal alloys and elastomer compounds to ensure long-term seal integrity in your specific concentration and temperature.

Full API 682 Compliance & Engineering: MIAOYU designs and manufactures this double acting mechanical seal to meet or exceed the stringent requirements of API 682 for hazardous services. Our engineering team can design custom piping plans (Plan 53A, 53B, 53C) and support systems tailored to your plant's utilities and safety protocols.

Precision Manufacturing & Testing: Every MIAOYU double acting cartridge undergoes rigorous manufacturing controls. After assembly, each double acting mechanical seal unit is pressure and function-tested with its barrier fluid to simulate real operating conditions, ensuring zero defects and guaranteed performance upon delivery.

Global Supply & Technical Support: As a double acting mechanical seal manufacturer with a global footprint, MIAOYU ensures reliable, timely delivery of these critical seals worldwide. Our technical support team provides application engineering, installation guidance, and troubleshooting for the entire seal support system.

Cost-Effective, OEM-Quality Solution: MIAOYU delivers the performance and reliability of top-tier brands at a significantly more competitive price point. By controlling the entire design and manufacturing process, we provide exceptional value without compromising on the quality and safety required for caustic pump sealing.

Product Specifications

Workshop

This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. It ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.

Product Research, Development and Testing

Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.

Industry Solutions

FAQs about Metal Bellows Seals for High Temperature Pumps

Q: Do I need an external reservoir tank for this seal?

A: Yes, a double-acting seal typically requires an API Plan 52 (unpressurized) or Plan 53A (pressurized) reservoir system. This tank supplies the barrier fluid that lubricates the seal faces and carries away heat. We can supply the complete package including the tank and instrumentation.