1 Venturi Valve LIT-12013220 December 2020 Product Bulletin Overview 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 PVDF coated valve options are 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
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Venturi ValveLIT-12013220
December 2020Product Bulletin
OverviewTop 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 PVDF coated valve options are 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
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Detailed optionsAluminum or stainless steelTypical 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.
HeresiteHeresite is a brown phenolic coating baked on exposed aluminum to minimize corrosion. Heresite coatings provide resistance to a wide range of corrosives.
Kynar/PVDFKynar/PVDF provides excellent chemical resistance, high levels of purity, and superior mechanical properties. It is often used as a lining or protective barrier in applications in which Heresite is not sufficient.
Thermal insulationOften used for supply valves, thermal insulation decreases energy costs by reducing thermal losses.
Constant volume or actuatedConstant volume Venturi Valves are used for biosafety cabinets, constant volume fume hoods, ventilated cabinets, and outside air regulation. Actuated valves are used in systems that adapt to a dynamic environment.
Medium or low pressureMedium pressure Venturi Valves (0.6 in. to 3 inches of water column) allow for higher flows for a given valve size, while low pressure Venturi Valves (0.3 in. to 3 inches of water column) require a smaller pressure drop across the valve for maintaining a constant flow.
Partially closed or full shut-offPartially closed Venturi Valves allow for higher flows for a given valve size, while full shut-off Venturi Valves allow the valve to close completely for equipment not currently in use, leading to energy savings.
Figure 1: Heresite coated valve
Figure 2: Kynar/PVDF coated valve
Venturi Valve
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Horizontal or verticalCustomers 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.
SizeTriatek offers 8 in., 10 in., 12 in., and 14 in. diameter valves for a variety of applications.
Ganged valvesValves can be ganged together to increase flow.
Figure 3: Venturi Valve sizes
A
D
C
Figure 4: Dual
Venturi Valve
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C
D
A
D
C
A
Figure 5: Triple
Figure 6: Quad
Venturi Valve
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C
D
A
Figure 7: Hex
Selection chartsTable 1: Dimensions and weights
Unit sizeWeight
Valve diameter Valve length (A)
Valve height (B)
Collar width (C)
Collar height (D)Aluminium SS316
lb kg lb kg in. mm in. mm in. mm in. mm in. mm8 in. 1 15 7 20 9 7.75 197 23 584 14 356 N/A
1 Minimum flow for SS316 8in PC valve is 50 CFM2 Minimum flow for SS316 12in PC valve is 110 CFM
Venturi Valve
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Ordering information
1 Flanged valves cannot be ganged together.2 Contact Triatek Sales for Kynar valve requirements.3 Constant volume valves need to be ordered with the required flow volume. Specify cfm for this purpose.4 14 in. valves are not available in full shut-off (Type = F) or SS316 (Material = S) at this time. 5 Refer to the UVM Installation Instructions for more information.
Note:• Low pressure (Pressure = L), full shutoff (Type = F) valves are NOT available in vertical upflow orientation (Airflow = U).• Vertical up flow (Airflow = U) low pressure (Pressure = L) valves maintain flow from 0.4 inWC to 3 inWC.
Feature Code letter or number and description
Product code number example:VVN10HNFAFULU
Brand VV = Triatek VVGanged1 N = Not ganged
2 = Dual3 = Triple4 = Quad
N
Size 08 = 8 in.10 = 10 in.12 = 12 in.14 = 14 in.
10
Material2 A = AluminiumH = HeresiteS = SS316
H
Insulation N = No insulationI = Insulated
N
Actuator CV = Constant volume 3
FA = Fast actingFA
Type4 P = Partially closedF = Full shut-off
F
Airflow H = HorizontalU = UpflowD = Downflow
U
Pressure L = Low pressure 0.3 to 3 inches of water column (inWC)M = Medium pressure 0.6 to 3 inWC
L
Linearization module5 U = Universal Valve Module (UVM)N = None
U
Table 4: Ordering guide
Venturi Valve
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Technical specificationsAluminum shell thickness 14 gauge (0.0641in)Stainless steel shell thickness 18 gauge (0.05in)Accuracy ± 5% or 10% cfm; whichever is greaterInternal assembly construction materials Stainless steel shaft and struts with Teflon® PTFE bearingsOperating range 32°F to 150°F (0°C to 65°C)
10% to 90% non-condensing RHFlame/smoke rating 25/50 Density 2 lb/3 ft (32 kg/m3)Performance Pressure independent over a 0.3 in. W.C. to 3 in. W.C. for low pressure and 0.6 in. W. C.
to 3 in. W.C. for medium pressure applications.Volume control accurate to ±5% of airflow command signalNo additional straight duct runs needed before or after valveResponse time to change in command signal: <1 secondResponse time to change in duct static pressure: <1 second
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.