Resources & Technical Support for Airless SCR Systems
Looking for maintenance data, emissions compliance benchmarks, or integration specs for your project? Explore our support hub for detailed answers and downloadable content. The E.I. Williams/IMS airless SCR platform streamlines everything—from Tier 4 compliance to long-term service planning.
Frequently Asked Questions
What makes the E.I.Williams/IMS SCR different?
Compressor-free DEF dosing system Modular design with built-in generator exhaust silencer 95% of components prewired and pretested before delivery
What kind of service does it need?
Minimal. Without air compressors or pneumatic systems, maintenance is simplified. See below for the full 5-year SCR service schedule.
Can it work with diesel particulate filters (DPFs)?
Yes, the system supports passive and active DPF + SCR integration for full aftertreatment compliance.
Can the unit be installed by an authorized remote technician?
Yes, this would be a possibility once an authorized remote technician is trained by us.
5-Year SCR Maintenance Schedule
Task
Frequency
Time per engine
Tier 4 Final Emissions Data
Category
Generator sets
NOx (g/kWh)
0.67 (0.50)
PM (g/kWh)
0.03 (0.022)
CO (g/kWh)
3.5 (2.6)
HC (g/kWh)
0.19 (0.14)
Category
NOx (g/kWh)
PM (g/kWh)
Generator
sets
0.67 (0.50)
0.03 (0.022)
Category
CO (g/kWh)
HC (g/kWh)
Generator
sets
3.5 (2.6)
0.19 (0.14)
Values shown meet or exceed EPA Tier 4 Final emissions limits.
Emergency Shutdown Safeguards
The airless DEF injection system includes a water cooling loop that protects the injector tip during unplanned high-load shutdowns — even without DEF flow.
Whitepapers & Downloads
Featured Publications
Need engineering specs or Tier 4F compliance documentation?
We’ll provide the full technical package — datasheets, CAD drawings, and emissions curves — for your project.