Fan filter diffusers (FFD) were introduced to the market in 1984 as a new solution in cleanroom applications. In situations where the use of conventional ducted modules is impractical or the air supply has insufficient static pressure to move the air through a HEPA filter, fan filter diffusers provide an excellent alternative.
In cleanroom design, the primary factor is contaminant removal and the cleanliness level, so moving the air is a major challenge. The volume of recirculated HEPA filtered air, including conditioned air to handle high cooling loads that are typical of many cleanrooms, can range from less than twenty to more than five-hundred air changes per hour. Fan filter diffusers are designed to address this situation by producing a laminar or unidirectional flow of clean air traveling downward at a velocity of 90-feet per minute, as measured 6” below the filter face.
Cleanroom manufacturing processes require a high level of air filtration to protect the raw materials and the end product from particulates that can damage the product or cause it to fail in use. Utilizing fan filter diffusers in cleanrooms prevents the infiltration of contaminants and also provides for the removal of particles generated by people and equipment in the work space. Typical cleanroom applications that utilize fan filter diffusers include:
- Semiconductor Manufacturing
- Pharmaceutical Manufacturing
- Medical and Dental Device Manufacturing
- Digital Device Manufacturing
- Food Processing Plants
- Computer Manufacturing
Titus’ Fan Filter Diffusers … Low Energy, Low Sound and Low Profile
Titus offers a complete line of fan filter diffusers that can be used for new design or upgrading existing cleanroom environments. Each Titus FFD is a self-contained fan filter module that includes HEPA or ULPA filter, pre-filter, and fan speed control. Air circulation is maintained by using a lightweight, forward-curved fan, powered by a 120V or 277V 60Hz motor. Motor speed is adjusted by the solid-state speed control that is mounted on the top of the housing. Patented baffling technology ensures uniform airflow across the filter face and attenuates sound for one of the quietest fan filter diffusers in the industry. The room side replaceable option (R) provides quick and efficient replacement of the HEPA or ULPA filter while the diffuser remains in place. Room side replaceable diffusers are ideal for plenum areas with limited space or applications that require frequent filter changes.
Titus’ fan filter diffusers are also available with an electrically commutated motor (ECM) option. These units dynamically adjust themselves to maintain the set airflow, compensating for changes in static pressure, filter loading or other local conditions. Titus fan filter diffusers with an ECM can easily maintain cleanroom air levels exceeding the Institute of Environmental Sciences and Technology’s recommended practices. Airflow is maintained so constantly and consistently that the need for future balancing is greatly reduced. The ECM option, along with the patented baffling system and forward curve fan, makes Titus fan filter diffusers intelligent, energy efficient and ultra-quiet.
Titus’ Fan Filter Diffuser Models:
· FFD - Standard construction, PSC motor, HEPA or ULPA filters, 2’ x 2’, 3’ x 2’, 4’ x 2’ sizes
· FFDE - Standard construction, ECM motor, HEPA filter, 2’ x 2’, 3’ x 2’, 4’ x 2’ sizes
· FFDR - Room side replaceable filter, PSC motor, HEPA filter, 2’ x 2’, 3’ x 2’, 4’ x 2’ sizes
· FFDER - Room side replaceable filter, ECM motor, HEPA filter, 2’ x 2’, 3’ x 2’, 4’ x 2’ sizes
· FFDRA - Room side replaceable filter and PSC motor, HEPA filter, 2’ x 2’, 3’ x 2’, 4’ x 2’ sizes
· FFDERA - Room side replaceable filter and ECM motor, HEPA filter, 2’ x 2’, 3’ x 2’, 4’ x 2’ sizes