QUALITYProducts.
SINCE 1948.

Industrial-Strength Supply Air Control for Reliable Ventilation

Keep your industrial or commercial spaces properly ventilated with Triangle Engineering’s RIWS Series Supply / Intake Shutters. Built for industrial ventilation needs, these shutters serve as robust intake dampers—ensuring smooth supply airflow while minimizing unwanted drafts or leakage. Designed and built in the USA, they feature a welded galvanized steel frame, 6063 extruded aluminum blades, and bronze pivot bushings for low-maintenance performance, even in tough environments. For proper operation, the shutter must be opened prior to energizing any fan, and we offer both manual pull chain and electric (115/230v 1-phase) operator options that can ship with the shutter for a turnkey installation.

Key Benefits

• Durability & Corrosion Resistance: A welded galvanized steel frame with a bronze finish and polyester powder coating stands up to harsh conditions, making these supply shutters ideal for industrial and commercial settings.
• Smooth, Low-Maintenance Operation: Bronze pivot bushings keep the shutter blades moving freely without routine lubrication or frequent adjustments.
• Optimized Airflow Management: The 6063 extruded aluminum blades are specially designed to allow efficient intake flow while minimizing reverse drafts.
• Flexible Configuration: Choose from single or double panel models, and enjoy simple wall or fan mounting options to fit virtually any ventilation setup.
• Proven Performance: Over 70 years of engineering expertise backs these shutters, giving you peace of mind with every installation.
• Uniform Blade Operation: Every shutter comes with a tie bar linkage to ensure consistent, simultaneous blade movement, preventing partial openings.

Applications

• Manufacturing & Industrial Facilities: Provide fresh air and maintain proper internal pressure in production plants and workshops.
• Agricultural Buildings: Ideal for barns, livestock housing, and greenhouses, where controlling incoming airflow and humidity is crucial.
• Warehouses & Storage Facilities: Maintain stable internal environments and help regulate temperature by allowing fresh air intake.
• Workshops & Garages: Draw in outside air to replace fumes or stale interior air, promoting a safer, more comfortable environment.

Technical Specifications

Frame Construction

• Material: Welded galvanized steel for superior strength
• Finish: Bronze finish with a polyester powder coat for enhanced corrosion resistance

Blade Construction

• Material: 6063 extruded aluminum blades
• Design: Engineered for low airflow resistance and to help minimize backdraft infiltration

Pivot Mechanism

• Bushings: Bronze pivot bushings for smooth, low-friction movement and reduced wear
• Tie Bar Linkage: Ensures uniform blade operation so all blades open and close together, preventing partial openings

Configuration Options

• Models: Single or double panel designs for varying airflow requirements
• Mounting: Available in wall mount and fan mount configurations for easy integration

Additional Notes

• Size Range: 27 3/8″ sq up to 68 1/4″ sq models; 4″ shutter depth
• Operation: Requires a manual pull chain or electric operator (115/230v 1-phase) to open the shutter prior to energizing any supply fan.

Related Products

IWS Series Exhaust Shutters: Designed for efficient removal of inside air, perfectly complementing RIWS intake shutters in a balanced ventilation system.

3000 Series Flangeless Dampers: Ideal for applications where a flangeless design is preferred, providing a streamlined solution.

3100 Series Front Flange Damper: Suited for installations where a front flange design is needed, offering secure mounting and reliable operation.

3200 Series Rear Flange Damper

3500 Series Rear Flange Damper