Venturi Valve
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Product Bulletin Top hospitals, universities, and research facilities across the globe trust Triatek® Venturi Valves to protect their occupants from dangerous airborne pathogens and chemicals. Triatek Venturi Valves maintain the desired airflow regardless of duct pressure. This is accomplished with a cone and spring-loaded piston inside the cone. As the duct pressure increases, the spring compresses and pushes the cone further into the shell. This mechanism keeps the volumetric flow rate constant as air travels through the valve and duct pressure varies. Triatek Venturi Valves utilize fast-acting electric actuators that provide a rapid response to changing conditions. This rapid response ensures the airflow is maintained which is critical in areas requiring a specific threshold of air flow in order to protect individuals from airborne chemicals or particulates. Features include: • Medium or low pressure ratings • Partially closed or full shut-off design • Valves available in 8 in., 10 in., 12 in., and 14 in. diameters • Available with Heresite® coatings • Kynar® and SS316 options available for special requirements • Dependable and easy to install • Available as a constant volume or with a fast acting smart actuator • Fully pressure independent in low and medium pressure applications • Factory calibrated airflow • Field adjustable • Low pressure drop • Can be ganged for increased flow • Maintenance-free • Can be calibrated for vertical or horizontal positioning • Designed for low sound power levels to meet or exceed ASHRAE (ANSI) noise guidelines

Venturi Valve Detailed options Aluminum or stainless steel Typical Venturi Valves are made of aluminum, but stainless steel is the material of choice for environments with highly corrosive or dangerous chemicals in the air stream. Heresite Heresite is a brown phenolic coating baked on exposed aluminum to minimize corrosion. Heresite coatings provide resistance to a wide range of corrosives. Figure 1: Heresite coated valve Kynar/PVDF Kynar/PVDF provides excellent chemical resistance, high levels of purity, and superior mechanical properties. It is often used as a lining or protective barrier...

Venturi Valve Horizontal or vertical Customers should specify how the valve will be situated in the duct work horizontal, vertical up or vertical down, as vertically mounted valves are calibrated differently. Size Triatek offers 8 in., 10 in., 12 in., and 14 in. diameter valves for a variety of applications. Figure 3: Venturi Valve sizes Ganged valves Valves can be ganged together to increase flow. Figure 4: Dual

Venturi Valve Figure 5: Triple

■ Selection charts Table 1: Dimensions and weights

Table 2: Partially closed (PC) Venturi Valve flow rates

Table 4: Ordering guide 1 Contact Triatek for flange and quick duct connection accessories. Flanged valves cannot be ganged together. 2 Contact Triatek Sales for SS316 and Kynar valve requirements. 3 Contact Triatek for special actuator requirements. 4 Constant volume valves need to be ordered with the required flow volume. Specify cfm for this purpose. 5 14 in. valves are not available in full shut-off at this time. 6 Refer to the UVM Installation Instructions for more information.

The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond these specifications, consult your local Triatek representative. Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products.