Airflow Control Valves
Another name to describe what the VFX is
What is a high accuracy terminal unit?
Type of room pressure control that will maintain CFM difference between the supply and exhaust, even when the door opens/closes
What is Volumetric Offset Control?
Permanently installed device to constantly monitor the room differential pressure as per ASHRAE 170
What is a pressure monitor?
Pharmacy standard that covers non-sterile compounding
What is USP 795?
Primary goal is to protect the user by maintaining face velocity through the opening of the hood
What is a fume hood?
This allows airflow control devices to maintain constant airflow when there are changes in duct static pressure
What is pressure independence?
Reheat or cooling coil will operate from 0-100% at the same time airflow is added to the room
What is synchronous temperature control?
Design criteria that can be reduced when an isolation or operating room is not in use
What is ACH?
Type of primary engineering control (PEC) that is divided into 3 classes and often used for preparations of hazardous drugs
What is a biosafety cabinet (BSC)?
Device that maintains constant airflow regardless of sash height
What is a constant volume fume hood?
Most common type of coating used on VV/VFX in corrosive fume hood applications
What is Phenolic Class 1 coating?
Most important design consideration when designing pressurized spaces for critical applications
What is a properly sealed room?
Type of isolation room that requires an ante room
What is an Airborne Infectious Isolation with Protective Environment (AII-PE) room?
Involves creating medication in a clean environment, but does not require the environment to be completely free from all microorganisms
What is non-sterile compounding?
Airflow = _____ x Face Velocity
What is the open fume hood area?
Turndown of a Medium Pressure size 108 Venturi Valve (VV)
What is 20:1?
Requires room pressure sensor and some sort of display (i.e. local monitor, front end system, etc)
What is room pressure monitoring?
Minimum number of outdoor ACH for an isolation room
What is 2 ACH?
Minimum pressure relationship for sterile ante rooms
What is +0.02 in.w.c.?
Type of fume hood control that utilizes a sash position sensor and sidewall velocity sensor
What is hybrid control?
Name of the third party accreditation for the Antec Controls valve airflow testing rigs
What is NVLAP?
Accessory that is highly recommended to include when performing direct pressure control, in addition to the room pressure sensor
What is the door contact switch (DCS)?
Short-term excursions from required pressure relationships shall be allowed during this scenario
What are doors moving or temporarily open?
Minimum ACH requirement for non-sterile and non-hazardous compounding
What is 4 ACH?
What is $3-$9 per CFM per year?