Honeywell CPRD Catalog Page

Bypass Dampers

TrueZONE Bypass Damper (CPRD)

The TrueZONE® Bypass constant pressure regulating damper
(CPRD) is a round static pressure relief damper. It is used in
forced-air bypass applications to relieve excess static pressure
when some of the zone dampers are closed.

• Quick installation and setup

• No weight to adjust

• Can be installed in any orientation

• Engineered to provide constant system pressure regardless of
changes in zones celling or blower speed

Application: Constant Pressure Regulating (Bypass) Damper
Damper Type: Bypass
Shape: Round
Motor: Cal brated spring tension regulator

Size

Product Number

CPRD8/U 8 in. Diameter 203 mm diameter 8 in. Round Constant Pressure Regulating Damper

CPRD10/U 10 in. Diameter 254 mm diameter 10 in. Round Constant Pressure Regulating Damper

CPRD12/U 12 in. Diameter 305 mm diameter 12 in. Round Constant Pressure Regulating Damper

CPRD14/U 14 in. Diameter 356 mm diameter 14 in. Round Constant Pressure Regulating Damper

Replacement Regulator for CPRD

Product Number Application Description

CPR8/U Replacement regulator for CPRD 8 in. TrueZONE Bypass replacement regulator

CPR10/U Replacement regulator for CPRD 10 in. TrueZONE Bypass replacement regulator

CPR12/U Replacement regulator for CPRD 12 in. TrueZONE Bypass replacement regulator

CPR14/U Replacement regulator for CPRD 14 in. TrueZONE Bypass replacement regulator

Descriptionin. mm

Static Pressure Regulating Damper (SPRD)

Single-blade, steel barometric damper used to bypass excess air
when majority of zone dampers are closed.

• Counter-balanced weighted arm to control bypass air for zoned
systems

• Air pressure in duct system increases as zone dampers close,
pushing the SPRD open automatically

• Arm and weight both adjustable to control amount of air bypassed

• Recommended for low pressure systems with less than 0.5 in. wc

• For larger systems and tighter pressure control, use MARD damper
and static pressure controller (SPC)

• Additional weights available

Application: Static Pressure Regulating Damper
Motor Type: Weighted damper arm

Product Number Shape Size (in.) Motor Type Used With

SPRD8/U Round 6 in. Diameter Weighted damper arm Honeywell zoning systems

SPRD7/U Round 7 in. Diameter Weighted damper arm Honeywell zoning systems

SPRD10/U Round 10 in. Diameter Weighted damper arm Honeywell zoning systems

SPRD12/U Round 12 in. Diameter Weighted damper arm Honeywell zoning systems

SPRD14/U Round 14 in. Diameter Weighted damper arm Honeywell zoning systems

SPRD16/U Round 16 in. Diameter Weighted damper arm Honeywell zoning systems

SPRD Damper Replacement Parts

Product Number Description

32005688-001/U SPRD Weight

32005981-003/U SPRD Counterweight Assembly (includes, arm, coupling, and weight). Used with SPRD 6, 8,9 and SPRD12x8, 20x8, 12x10, and

32005981-004/U SPRD Counterweight Assembly (includes arm, coupling, and weight). Used with SPRD10, 12,14,16, and SPRD12x12 and 20x12.

20x10.

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