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Home > Products > DAMPERS > GRAVITY DAMPERS
Gravity dampers PVC / CPVC
Gravity dampers PVC / CPVC
Gravity dampers PVC / CPVC
gravity damper PVC / CPVC
DAMPERS

Gravity Dampers

Fabricated gravity dampers designed to provide automatic backflow prevention in industrial ventilation and exhaust systems. Available in PVC and CPVC materials, these dampers open with airflow and close when airflow stops, helping maintain efficient system performance while offering excellent corrosion resistance and durability.

Fabricated gravity dampers designed to provide automatic backflow prevention in industrial ventilation and exhaust systems. Available in PVC and CPVC materials, these dampers open with airflow and close when airflow stops, helping maintain efficient system performance while offering excellent corrosion resistance and durability.

Corrosion
Resistant

Chemical
Resistant

Lightweight & Strong

Lightweight &
Strong

Low
Maintenance

Specifications
Select Material & Size

Choose your material to view available models, dimensions, and end configurations.

PVC

Polyvinyl Chloride

CPVC

Chlorinated Polyvinyl Chloride

  • PVC supports corrosion-resistant industrial ventilation applications with strong chemical durability and low maintenance.

PVC GRAVITY DAMPERS

Model NumberNominal Duct Size
A*B*C*Bolt Hole
GD-PVC-446591/2
GD-PVC-667.6256.625111/2
GD-PVC-889.6258.62513.501/2
GD-PVC-9910.3759.375151/2
GD-PVC-101011.75010.750161/2
GD-PVC-121213.75012.750191/2
GD-PVC-14141514211/2
GD-PVC-1616171623.501/2
GD-PVC-18181918251/2
GD-PVC-2020212027.51/2
GD-PVC-24242524321/2
17-PVC-Gravity-Dampers-2026-06-16.csv
  • CPVC supports industrial ventilation applications requiring greater temperature resistance and chemical durability.

CPVC GRAVITY DAMPERS

Model NumberNominal Duct SizeA*B*C*Bolt Hole
GD-CPVC-446591/2
GD-CPVC-667.6256.625111/2
GD-CPVC-889.6258.62513.501/2
GD-CPVC-9910.3759.375151/2
GD-CPVC-101011.75010.750161/2
GD-CPVC-121213.75012.750191/2
GD-CPVC-14141514211/2
GD-CPVC-1616171623.501/2
GD-CPVC-18181918251/2
GD-CPVC-2020212027.51/2
GD-CPVC-24242524321/2
18-CPVC-Gravity-Dampers-2026-06-16.csv

Need a size or configuration not listed?

Request Custom Size Or Configuration
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A Division of Plastic Design Industries
Chemical Systems Services, Inc.

Custom plastic environmental control and containment equipment, fabricated in corrosion-resistant thermoplastics.

Company Overview

Chemical Systems Services, Inc. (CSSI) is a leading custom designer and manufacturer of plastic environmental control and containment equipment, fabricating corrosion-resistant systems from thermoplastics including polypropylene, PVC, CPVC, and PVDF.

Capabilities & Products

An experienced staff of chemical engineers and designers builds systems to each client’s specifications. The range includes PVC and CPVC fittings, blast gates and dampers, scrubbers, fume hoods, tanks and sinks, containment trays, and casework — most fittings stocked for fast delivery, all made in America.

Plastic Design Industries
Plastic Fabrication & Engineering
Plastic Design Industries

New England’s oldest and largest plastic fabrication house — engineered systems from prototype to full production.

Company Overview

Plastic Design Industries (PDI) uses the unique properties of modern engineering plastics to supply systems and products for industries from biomedical and pharmaceutical to microelectronics and photonics. With automated fabrication equipment and expert computer-aided design, PDI supplies any quantity — from a one-off prototype to a full production run.

Capabilities & Services

PDI takes projects from concept to completion — design, engineering, testing, and validation — spanning cleanroom essentials, fume hoods, wet-process equipment, custom tanks, lab furniture, pure-fluid (PFA) assemblies, casework, and precision welding and machining. ISO 9001 accredited and made in the USA.