The integrity of a piping system depends on the performance of its seals. When using non-metallic flanges—such as PVC, CPVC, PP, PVDF, and FRP (Fiberglass Reinforced Plastic)—traditional flat gaskets often present a significant challenge. The high bolt torque required to achieve a proper seal can lead to flange deformation, cracking, or system failure.
Low torque gaskets are specifically designed to address this critical issue. Manufactured by combining soft, compressible materials (such as EPDM or PTFE) with a specialized double-convex profile, these gaskets deliver effective sealing with up to 75% less bolt torque compared to conventional flat gaskets.
Core Design Features & Advantages
Double Concentric Convex Sealing Rings: The gasket features a unique double concentric convex sealing ring design that reduces the sealing surface area by 75%, achieving a high-integrity seal with significantly reduced bolt load.
Pure PTFE Sealing Surface: Resists a wide range of chemicals, protecting flange faces from corrosion, chemical attack, and wear. It performs reliably across the full pH range of 0 to 14, making it ideal for systems handling acids, caustics, bleaches, gases, potable water, wastewater, and steam.
High-Performance Elastomer Options: Peroxide-cured EPDM offers enhanced high-temperature resistance, while Viton® (FKM) is available for applications requiring superior thermal and chemical resistance.
Sanitary & Regulatory Compliance: FDA or WRAS-approved EPDM materials are available, making these gaskets suitable for food processing, potable water, and pharmaceutical industries.
Ease of Installation: Equipped with a molded ring tab for convenient storage and accurate positioning during installation, simplifying assembly and reducing maintenance downtime.
Extended System Life: The design reduces fluid turbulence and pressure drop, contributing to longer system life and ensuring the long-term structural integrity of the piping network.
Applications
Chemical processing and transfer systems
Water and wastewater treatment plants
Corrosive or high-purity fluid handling
Highly regulated industries, including food & beverage, pharmaceutical, and water treatment
Marine and shipbuilding: lightweight, corrosion-resistant piping networks
Power and utility systems: corrosion-resistant sealing for industrial utility applications
Ideal for thermoplastic piping systems, as well as metal or plastic-lined metal pipe systems.
Technical Specifications
We offer low torque gaskets manufactured in accordance with ANSI ASME B16.27 and EN1514-1 standards.
Materials Available:
Solid rubber: EPDM or Viton® (FKM)
Composite: PTFE-bonded EPDM / Viton®, or PVDF-bonded EPDM / Viton®
Size Range:
ANSI ASME B16.27: ½" to 24" Class 150
EN1514-1: DN15 to DN700 PN10 / PN16
Custom Sizes:
Larger gaskets are available for custom order, with a maximum outer diameter of up to 2 meters.
Compliances:
FDA, REACH, RoHS
