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Our galvanized perforated coils are designed for acoustic performance and fabrication efficiency, with stocked sizes and patterns available for same-day shipping and fast turnaround on custom orders.
Perf Coils for Ductwork- Stocked Standard
Stocked 5.394” and 60” wide perforated coils for acoustical ductwork are ready to ship same or next day.
- 5.394” perforated slit coils for spiral-round acoustical ductwork.
- 60” wide perforated coils for rectangular acoustical duct fabrication.
- Industry standard 22.7 % open area .093” round holes x .1875” centers, staggered perf pattern.
- Same-day/next-day shipping on in-stock items.
Custom HVAC Perf? We Got All Your Design & Process Options Covered!
From material type to perforation pattern and coil dimensions, we offer complete customization to meet your exact HVAC design and fabrication needs—backed by thousands of pattern options and broad material capabilities.
- Custom manufacturing capabilities for alternative material, pattern, & configuration requirements.
- All material types & thicknesses: stainless, galvanized, aluminum, carbon, Inconel.
- Over 4,000 off-the-shelf perforation patterns available.
- Custom Tooling available.
- Custom coil widths, sheet size and side-margin configurations.
- Perforated sheets for HVAC enclosures, louvers, and custom assemblies.
- Short lead times for custom orders.
We Solve What Slows You Down —
Burr-Free, Fast HVAC Perf
Our in-house precision tooling, clean perforation, and tightly wound coils help eliminate common production issues—so you get high-quality material, delivered fast and ready to run.
- Short Lead Times: Get coils in days—not weeks or months.
- Round IDs/Large Coils: Our 20” ID / round cores and tightly wound coils ensure smooth helix machine operation.
- No-Burr Perf: With in-house precision tooling and state-of-the-art perforating equipment, we deliver clean, burr-free perforations.
- Large Coils: All coils are packaged to your spec: 5,000 lb. max skid weight for 5.394” coils, 10,000 lb. max for 60” coils.
- Residue-Free Material: Precisely applied, water-soluble vanishing lubricants produce coils with little to no residue.
Need assistance with your project?
Call or email our customer service coordinator to connect today.
Need assistance with your project?
Call or email our customer service coordinator to connect today.
The Diamond Difference for HVAC
Fast, Flexible Fulfillment:
Same-Day Shipping for stock items and One-Week Lead-Times for Custom Orders.
Precision Punching:
No-Burr Perf tools are built & maintained in-house for clean, consistent perforation.
Custom Packaging:
In-house carpentry shop provides solid and secure 5.394” eye-to-the-sky and 60” eye-to-the-side packaging.
Clean, No/Low Oil Material:
Precisely applied, water-soluble vanishing lubricant provides a low- to no-residue material for consistent feeding and easy fabrication.
Custom Capabilities:
Unique widths, gauges, materials, and patterns made to your needs.
SPIDA Member:
Supporting HVAC industry standards and best practices.
Comprehensive Solutions for Every Stage of Your Project
From precision perforating and post-perforating services to custom fabrication, engineering expertise, and tailored packaging programs, Diamond delivers end-to-end support for your manufacturing needs. Explore our capabilities to see how we can streamline your process and add value at every step.
Diamond Manufacturing is a wholly owned subsidiary of Reliance Steel & Aluminum Co.
Site designed and developed by Blair Inc.
Contact Us
Physical address:
243 West Eighth Street
Wyoming, PA 18644
Mailing address:
P.O. Box 4174
Wyoming, PA 18644
800-233-9601
[email protected]
© 2023 Diamond Manufacturing Company
Site designed and developed by Blair Inc.