Greenheck Vektor-M Series User manual

Greenheck’s bypass air dampers and isolation dampers are designed to provide superior
airflow control in severe environments.
System dampers are designed and sized for specified application pressure and flow requirements. Both isolation
and/or bypass air dampers on Vektor systems are available with factory-mounted and wired electric actuators.
Each actuator is selected and sized to handle the specific torque requirements of the laboratory application.
Greenheck Advantages:
• Bypass air dampers are custom selected for each system static pressure and flow
• Structurally rigid, airfoil formed steel blades are corrosion-resistant coated steel, formed to operate against
high static pressures
• Damper shaft, bearings, and jamb seals are 316 SS
• All non-stainless components have a polyester resin powder coating, electrostatically applied and baked at
400ºF. (Standard on isolation dampers, optional on bypass air dampers).
• Damper and drive linkage is factory set and welded to prevent mechanical slippage. Linkage and operators
are outside of the hazardous/corrosive exhaust.
• Bypass air dampers use opposed blades for accurate flow control. Isolation dampers maintain plenum
containment using tight shut-off parallel blades.
• Industrial isolation and bypass air dampers are manufactured by Greenheck Fan Corporation, Schofield,
Wisconsin USA
Isolation & Bypass
Dampers and Controls
for Vektor Laboratory Exhaust
Vektor-M Series Bypass Air Plenum
and Roof Curb
Vektor-C Series Bypass Air Plenum
and Roof Curb
April
2018

Vektor Isolation Dampers Features and Options Vektor-M Series Vektor-C Series
Standard Construction Material (Frame, Blade) Galv. Steel Galv. Steel
Stainless Steel Construction Material (Frame, Blade) Optional Optional
Hi-Pro Polyester Coating Yes Yes
Blade Style Airfoil Airfoil
Electric Actuator Optional Optional
Greenheck isolation dampers are designed to prevent air leakage into the system when the fans operate in
“stand-by” mode or the system is off. Isolation dampers are two-position actuated as standard (provided with
electric actuators as an option), or can be provided as gravity backdraft (please consult the factory).
Isolation dampers are factory installed and shipped with the bypass
air plenum as an assembly; constant volume systems (no bypass
air plenum) may have curb mounted isolation dampers
Standard isolation damper construction includes a polyester resin
powder coated and baked, heavy-gauge steel formed casing and airfoil
blades. Jamb seals, bearing and blade shafts are stainless steel.
Isolation dampers can be removed by detaching the cover (Vektor-M)
or by removing the compact square-to-round transition (Vektor-C)
without accessing the contaminated interior of the bypass air plenum
Shaft extensions are provided for all actuators. Actuators can be
factory-mounted.
Isolation dampers use parallel airfoil damper blades
Damper linkage and optional actuator are located
outside the exhaust airstream and protected
by a weatherproof cover
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3
2
5
6
1
6
5
4
3
1
2
Isolation Dampers

Greenheck’s bypass air dampers mix ambient air with exhaust air from the laboratory space. On variable
volume lab exhaust systems, bypass air damper modulation allows reduction in lab exhaust flow while
maintaining constant fan discharge flow rate, velocity, and plume rise.
A weatherhood with the stainless steel
birdscreen protects the bypass damper,
actuator and damper controls from the
ambient elements. Damper actuators
and controls are mounted outside of the
contaminated exhaust allowing servicing
without accessing the contaminated
plenum interior.
Bypass dampers utilize opposed blades for
flow control and are sized for each unique
system application. Construction includes
a polyester resin coated and baked, heavy-
gauge steel formed casing and airfoil
blades. Jamb seals, bearing and blade
shafts are stainless steel. Damper blade
edge seals are silicone.
Bypass dampers are available with
optional factory-mounted electric
modulating or pneumatic actuators.
Vektor Bypass Damper Features and Options Vektor-M Series Vektor-C Series
Standard Construction Material (Frame, Blade) Galv. Steel Galv. Steel
Stainless Steel Construction Material (Frame, Blade) Optional Optional
Hi-Pro Polyester Coating Optional Optional
Blade Style Airfoil Airfoil
Electric Actuator Optional Optional
1
3
2
1
23
Bypass Air
Damper
Isolation Damper
Bypass Air Plenum
Lab Exhaust
(Horizontal Intake)
Lab Exhaust
(Vertical Intake)
Bypass Air
What Does Bypass Air Do?
As the lab exhaust flow requirement
diminishes, the bypass air damper opens,
reducing the lab exhaust flow and adding
ambient air to the reduced lab exhaust
flow. The added bypass air assists in the
dispersion of hazardous lab effluent while
maintaining constant fan discharge flow,
velocity, and plume rise.
When the lab exhaust flow requirement
increases, the bypass air damper closes
and reduces the amount of added
ambient air to the increased lab exhaust.
Bypass air dampers are typically
controlled with modulating actuators tied
into the laboratory control system.
Bypass Air Dampers and Weatherhoods

Vektor lab exhaust isolation and bypass air dampers are available with factory-mounted electric or pneumatic
actuators to expedite system installation and to contribute to a safe, operational lab system.
Isolation Damper Actuator Options
• 2-position spring return actuator with end switches
• Electric actuators in 230 VAC, 115 VAC, 24 VAC, or 24 VDC are
mounted and wired with transformer
• Single point wiring of the transformer and actuator
• NEMA-1 enclosure (NEMA-4 enclosure optional)
Bypass Damper Actuator Options
• Modulating operation for bypass airflow control
• Electronic actuators in 230 VAC, 115 VAC, 24 VAC, or 24 VDC
(transformers optional)
• NEMA-1 enclosure (NEMA-4 enclosure optional)
Isolation Damper Actuator
and Transformer
Bypass Damper Actuator
Prepared to Support
Green Building Efforts
Family of Lab Exhaust Systems
Vektor®-MHVektor®-H
Vektor®-CS
Vektor®-CD
Vektor®-MD
Vektor®-MS
Vektor®-HS
Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves the right to change
specifications without notice.
Specific Greenheck product warranties are located on greenheck.com within the product
area tabs and in the Library under Warranties.
P.O. Box 410 • Schofield, WI 54476-0410 • Phone [phone] • greenheck.com
Damper Controls
Copyright © 2018 Greenheck Fan Corp. • 00.LAB.1006 R2 4-2018 RG
Vektor®-CH