Nitric Acid Expanders

Nitric Acid Expanders

Decades of Experience in Multi-OEM Nitric Acid Expander Design, Analysis, Manufacture, Repair, and Service.

RMS’s experienced staff of Nitric Acid Expander experts ensures the highest degree of engineering support while offering the rapid response required to facilitate demanding Expander repairs. RMS’s expert engineering team implements industry-leading quality of service from start to finish.


RMS Supports All Types Of Nitric Acid Expanders From Every OEM • Engineered Solutions Tailor Made To Your Nitric Acid Expander


Inner and Outer Casing • Stators• Seals • Remachining • Welding • Journal Restoration • Curvic Grinding • Bearing Reliability


Reliability • Performance • Improved Materials • Bearings Controls • Instrumentation


Power • Flow • Speed • Gas Conditions


Performance • Structural • Frequency • Failure • Rotordynamic • Vibration • Remaining Life • Metallurgical


  • Complete assembly and disassembly of Nitric Acid Expanders and rotors
  • Full cleaning capabilities with on site blasting
  • On site NDT, MPI, LPI, UT, and RT capabilities
  • Complete quality documentation of services performed
  • Full customer access


  • Blades
  • Discs
  • Stators
  • Inner and Outer
  • Casings
  • Bearings
  • Seals
  • Couplings


  • Decades of experience supporting critical turnaround
  • Facilitate outages both in the shop or in the field
  • Assistance during planning, and execution of critical outage materials
  • Engineering expertise and supervision during outage planning and execution

The RMS Difference

Sydney Gross, Director of Turbine Solutions, offers over 30 years of rotating equipment engineering experience. Sydney’s specialization in these critical machines enables RMS to offer superior engineered solutions tailored to your specific Nitric Acid Expander. “Nitric Acid Expander service is challenging owing to the high temperatures, long service, and frequent shutdowns. RMS has the experience and attention to detail critical to a successful build.”

– Sydney Gross – Director of Turbine Solutions

Bethlehem Shop
South Houston Shop

Corporate Office
2760 Baglyos Circle
Bethlehem, PA 18020

Tel: 484-821-0702

RMS Pearland Works
14887 Hooper Rd.
Houston, TX 77047


Houston Sales Office
16676 Northchase Dr. Suite 400
Houston, TX 77060


RMS Mepco
11410 Dumas Street
Houston, TX 77034

Tel: 484-821-0702

RMS Breaux Machine Works
13842 Hirschfield Rd.
Tomball, TX 77377

Tel: 484-821-0702

Appleton Eng. & Sales
400 Ahnaip St.         Suite 200
Menasha, WI 54952

Tel: 484-821-0702