Engineered for Safety: Ammonia Seals by Stein Seal Industrial
When it comes to sealing hazardous chemicals like ammonia, reliability isn’t optional, it’s essential. At Stein Seal Industrial, we engineer and manufacture high-performance ammonia seals that help our customers protect their people, their equipment, and their communities in even the most challenging industrial contexts.
Special Considerations for Ammonia Seals
Ammonia is widely used in industrial refrigeration systems, fertilizer manufacturing, power generation, and chemical processing. While it is a highly effective refrigerant and an essential base chemical, ammonia is also toxic, corrosive, and potentially flammable. Sealing systems that handle ammonia must not only prevent leakage under high pressure, they must do so while withstanding aggressive chemical exposure, temperature fluctuations, and the stresses of continuous operation.
Stein makes ammonia seals with all of these requirements in mind. Whether integrated into reciprocating compressors, rotary pumps, or ammonia-based process equipment, our seals are engineered to perform in the harshest chemical conditions. We work closely with customers to deliver solutions that meet exact performance specifications, material compatibility needs, and safety standards.
Custom-Engineered for the Task at Hand
Stein ammonia seals are typically constructed from corrosion-resistant materials like stainless steel, PTFE (Teflon), carbon, and EPDM to ensure long-term durability in the presence of ammonia. Precision tolerances help prevent leaks, reduce wear, and extend seal life, minimizing maintenance downtime and maximizing system uptime.
Ammonia seals are commonly designed to:
- Containment of pressurized ammonia within compressors or pumps
- Prevent atmospheric contamination
- Resist corrosion and swelling caused by anhydrous ammonia or aqueous ammonia solutions
- Withstand low-temperature, high-pressure conditions occurring in ammonia refrigeration systems
Suitable Seal Types for Ammonia Applications
Stein Seal provides a range of mechanical seals designed to handle ammonia:
Film Riding (Dry Gas) Circumferential Seals
- Patented FRCS design: carbon rings ride on a gas film for near zero wear and long life.
- Built for compact installations, retrofits, and low-pressure gas sealing—ideal for ammonia compressor packing and turbine shafts.
Circumferential Carbon Seals
- Optimized for low-pressure gas leakage, unlimited axial movement, thermal resistance up to ~1000 °F, and minimal wear.
Face Seals with Lift Geometries
- Custom-engineered face seals (O‑ring, piston ring, or bellows secondary designs) with hydrodynamic or hydrostatic lift elements.
- Suitable for moderate pressure and ammonia velocity applications.
Bellows Seals
- Ideal for corrosive, toxic gases like ammonia due to leak integrity and temperature tolerance.
- Paired with face seals in dual configurations for superior sealing.
Bushings/Bushing Seals
- Form a close clearance around the shaft to limit gas leakage through flow resistance.
- Custom-engineered for high‑pressure gas applications, often used in conjunction with other seal types.
Trust Stein Seal for Your Ammonia Seal Needs
As with all Stein products, our ammonia seals are backed by decades of engineering expertise, rigorous quality control, and responsive customer support. We serve a wide range of industries, from food and beverage cold storage to chemical manufacturing, and we understand the operational pressures our customers face. Our in-house design and testing capabilities allow us to respond quickly to design challenges and deliver reliable solutions that improve both safety and efficiency.
Let Stein find the solution to your industrial sealing needs. To begin the conversation, contact us at steinsealind.com.
