So How Does Room Pressurization Work?
Opening a door and not feeling air coming out, or even worse, the air being pulled in with negative pressure, is a problem.
Room pressurization with positive clean air keeps conductive dust and other harmful contaminants out! SMAC does this by forcing enough clean air into the room that it is impossible for dust to enter. You can tell when a room has positive pressure if you open a door and can feel air coming out.
Room Pressurization Applications
EAF/LMF Transformer Vaults
Electrical Equipment Rooms
Motor Drive Rooms
Laboratories & Testing Facilities
SMAC is the solution for many room pressurization applications commonly found in steel mills. Systems has a long line of successful transformer vault SMAC unit installations. Our SMAC systems are in place protecting EAF and LMF transformer vaults across the country, eliminating conductive dust and arc flash.
The SMAC unit can be sized for any single MCC room or even multiple MCC rooms. The SMAC comes in many different variations. It is modular in design so making a standard model custom is an easy task for any size room. An MCC room pressurization system couldn’t be simpler.
At Systems, we believe Safety is JOB ONE, which includes the air we all breathe. SMAC units can provide HEPA grade filtration to operator pulpits anywhere in your mill, protecting your employees.
Crane cabs operate where noxious gases and particulates accumulate most in a mill. Our SMAC units can be sized small enough and light enough to fit on a crane deck, providing HEPA grade filtration to your crane operators.
SMAC vs. HVAC Room Pressurization Systems
What type of room pressurization equipment is best? Fans with heating, ventilation, and air conditioning (HVAC) filters have traditionally been used but are they the right choice today? Which room air pressurization systems are ideal for steel mill applications like MCC electrical rooms?
While most steel mills use HVAC systems in an attempt to keep areas clean, this is inefficient and ineffective because these types of filters are not able to catch all of the dust particles. When these filters have dust on them it increases the static pressure resistance on the HVAC system and can reduce the amount of positive pressure in the room.
HVAC systems with standard filters are typically rated MERV 5. However, this type of system is not ideal for use in a steel mill. The airborne dust load in a typical steel mill is very high. Standard HVAC filters are not designed to deal with this type of dust load. They will quickly become overwhelmed with dust and will start to block airflow through the system as well as allowing smaller dust particles through the filters.
Also, it is common for the HVAC filters to require changing once a week or even once a day. Besides the expense of constant filter changes, steel mills also must deal with the time and labor required to change these filters. Further, the cost of disposal must be handled since the filters may contain hazardous materials.
Instead of HVAC or HEPA filters, SMAC (Self-Maintaining Air Cleaner) uses round cartridge filters that hang vertically from a tube sheet. It’s called “self-maintaining” because its filters are cleaned by pulses of compressed air.
As a result, they do not require manual cleaning. By using positive pressure from SMAC, critical spaces in steel mills can be kept clean at a much lower cost and with better results. It’s the forefront room pressurization unit for steel mills.