Liquified gas pump for ammonia transfer

A leading phosphate industrial company based in Morocco required a reliable pumping solution to handle liquefied ammonia at -33°C with high pressure transfer.

The pumps were intended for storage operations in a classified explosive area (ATEX), demanding specific safety standards and a leaktight configuration.

Given the hazardous nature of the fluid which can evaporates in contact with atmosphere, the client needed a solution that would combine robust design, safety, and long-term reliability.

Fabrication Number: BF2237 – BF2242
Name of the Pump: 65GI-A 4 BAIN_P45F2
User Industry: Fertilizer Plant, Morocco
Pumped Fluid: Liquefied Ammonia (NH₃)
Design Conditions: 25 barg at -33°C
Pump Working at: 52.8 m3/hr at 179.1 m

OPTIMEX delivered a tailored solution based on its MULTI range of sealless canned motor pumps, specifically designed for liquefied gas applications.
Key features of the solution included:

• Casing barrel design to reduce static seals and anvoid tie rods
• Inducer for improved NPSH performance
• Hermetically sealed pump with no dynamic sealing
• Designed according to API 685 standards
• Compliant with ATEX directive

All six pumps were designed, assembled and tested at OPTIMEX before shipment.

• Safe and leak-free operation in a hazardous environment
• Reliable transfer of liquefied ammonia at low temperature
• Minimal maintenance thanks to Optimex axial balancing system design
• Standardized solution across six units for simplified installation