DEVELOP YOUR SPECIFIER EXPERTISE
If you are designing a manufacturing facility where materials will be moved in and out of refrigerated or sanitary processes frequently each day, the types of traffic doors you specify can have a significant impact on production efficiencies for your client. Quality control in any operation involving food, beverages, pharmaceuticals, semi-conductors, cold storage/freezer areas and other critical processes is directly influenced by air exchange. And that applies to cross contamination within the plant as well as to outside temperature, humidity and particulates.
Raynor offers several traffic door solutions for code compliance along with improved air quality control for this broad category of manufacturing operations.
The key is shorter open and close times.
As forklifts and other material handling equipment travel throughout a plant, the large interior doors they pass through can allow large volumes of conditioned air to be transferred in seconds. This free movement of air is particularly of concern in ultraclean environments such as pharmaceutical plants. Air particulates, humidity, temperature differentials and other air quality metrics are closely monitored in processes of this type. When possible, keeping the production area pressurized with higher PSI for the inside space is one tactic to mitigate the inflow of exterior "bad" air.
The potential impact on cold storage areas is also substantial, affecting both energy costs as well as product quality. The goal in freezer areas is of course to keep the products cold and dry. When air is exchanged through an open door, particular one that is slow operating, ambient humidity and temperatures enter the cold space, creating condensation and even visible ice. The traditional solution in many facilities is to introduce warm air to the general area inside the door to defrost the space. That takes more energy to generate heat as well as to offset it with additional freezer power. A fast-acting door is a simple solution to this challenging and vicious cycle.
A Raynor RC200 RapidCoil door helps safeguard sanitary conditions in this clean and dry traffic opening
Add value by addressing your client's need for efficiency
At top of the scale in terms of what roll-up fabric doors can do to preserve air quality are Raynor's RapidCoil doors that open at up to 48 inches per second, 96 inches with an optional maximum speed drive unit. A gear driven push-pull system drives the curtain in both directions. Door closing speed is also lightning fast at 24 inches per second, with cushioned lower edges and side sensors for safety. Made of reinforced 27 oz PVC vinyl, they can take a beating and will even return to full open and re-insert themselves in the channels if struck.
View video of RapidCoil operation
The heavy duty RapidCoil model RC300HD can be used in exterior as well as interior applications, providing windload protection to Class 4, equivalent to 115 mph depending upon door size. This model can be specified for openings up to 18 ft x 18 ft., making quick open-close access possible for largest equipment and loads.
RapidCoil 300HD In Exterior Installation
Other RapidCoil models are specifically for plant interior use with opening sizes to 12' x 12'. They can be customized with vision panels up to 24" square, a choice of 9 colors plus luminous white and with an optional bug screen.
Insulation vs Speed
There are many views on the suitability of this type of door when extreme temperature differentials are necessary between spaces. While the doors open and close quickly, they do not afford the insulation value of sectional overhead doors or rolling steel doors in static mode. The Door & Access Systems Association (DASMA) has developed a standard for testing procedure to examine that relationship between thermal transmittance and air infiltration.
In many applications, we find that the benefits of limiting air infiltration can outweigh door insulation drawbacks, particularly in facilities with high traffic (frequency of door use). Still, you and your client may wish to have energy performance projections done for your specific application. We can assist with those projections or provide data for independent evaluation.
For additional thermal isolation, one option to consider is to install the doors in tandem to create a vestibule. Each door can be individually programmed and operated but only opens when the other door is closed. In this manner, the doors provide an air lock function that is also fast acting.
Quick Reference for Aspiring Traffic Door Experts
While currently published specifications do not identify specific end-use plant requirements or call for nuances that you must think about for a given type of production process, you might note these resources:
1. ARCAT CSI section 08330 (Rolling and Coiling Doors).
Note: Skip to page 18 (High Speed Traffic Doors)
These provide more of the detailed performance criteria you need to evaluate door designs, materials and operators. Specification documents are available in our printed as well as app-based Architect Design Manual.
3. Raynor regional sales managers are also a great resource whenever you are putting together a construction plan. And if your requirements call for personal collaboration with our engineering team, we welcome that opportunity and will do our best to provide the input you need for project success.