Brochure
14
The Smart By-Pass Damper automatically measures,
monitors and maintains the designed operating static
pressure of all HVAC systems in all modes of operation.
The SBD will capture the total static pressure of the
system during non-zoned mode, and modulate to
maintain that static pressure during zoned mode. As
zone dampers open and close the static pressure will
fluctuate in the HVAC system. The SBD is designed
to sense that static pressure flucuation and will
modulate to maintain the proper operating static
pressure during zoning modes.
Size List Price
12" X 8" SBD $592.00
12" X 10" SBD $609.00
12" X 12" SBD $613.00
20" X 8" SBD $612.00
20" X 10" SBD $637.00
20" X 12" SBD $643.00
Other sizes available upon request.
Additional Arms and Weights
MODEL# PRD-Weight and Arm
(List Price $20.00)
Box of 10 Model # PRD-Weights -10
(List Price $99.00)
Size List Price
8" SBD $524.00
10" SBD $545.00
12" SBD $592.00
14" SBD $612.00
16" SBD $830.00
18" SBD $910.00
20" SBD $950.00
RESTRICTING HAND DAMPERS
The hand damper is used to restrict airflow through
the by-pass trunk during by-pass operation. These
were designed to meet ACCA Manual Zr specification
performance ratings and California Title 24
requirements.
(Available in all ND sizes. See Page 13)
Call for pricing.
NOTE – We will make any size SBD. Use with ND
or URD style damper. (See Page 11 & 13)
Size List Price
8 RD-HD $80.00
10 RD-HD $85.00
12 RD-HD $96.00
14 RD-HD $105.00
16 RD-HD $110.00
18 RD-HD $120.00
Size List Price
12x8 ND-HD $124.00
12x10 ND-HD $126.00
12x12 ND-HD $129.00
20x8 ND-HD $149.00
20x10 ND-HD $154.00
20x12 ND-HD $165.00
RD-HD
SBD
SBD
ND-HD
As a barometer use 1400 Fpm to achieve smaller by-pass runs at higher velocities.
MODEL PRD
Rectangular List $
By-Pass CFM
12"x8" PRD $147.00 1000
12"x10" PRD $153.00 1200
12"x12" PRD $164.00 1400
20"x8" PRD $180.00 1600
20"x10" PRD $186.00 2000
20"x12" PRD $193.00 3000
@ 1400 fpm
or .3" w.c.
MODEL PRD-RD
Round List $
By-Pass CFM
8" PRD-RD $141.00 400
10" PRD-RD $149.00 750
12" PRD-RD $154.00 1200
14" PRD-RD $164.00 1800
16" PRD-RD $175.00 2400
@ 1400 fpm
or .3" w.c.
Static Pressure Control
Model PRD and PRD-RD pressure regulating
dampers are a single blade, barometric damper
with a counter balanced weighted arm. The
damper provides an economical solution for
bypassing excess air when zone dampers close.
Damper adjustment is done by adjusting the
supplied weights and offsetting the arm. The
dampers are reversible for Airow Direction.