Polypac Diaphragms — Precision Custom Sealing Solutions

Diaphragms by Polypac: Precision Sealing for Critical Applications

Overview

Polypac designs and manufactures high-performance Diaphragms tailored for hydraulic, pneumatic, and industrial sealing systems. With a foundation in filled PTFE technology and decades of elastomer expertise, our diaphragms deliver reliable motion control, fluid separation, and pressure management across a wide range of temperatures and media.

Materials & Performance

Our Diaphragms are available in advanced materials including filled PTFE (bronze, carbon, graphite, MoS₂, glass) and elastomers such as NBR, FKM, EPDM, silicone and FFKM. Material selection is optimized for chemical compatibility, temperature endurance, flex life, and low permeability—ensuring stable performance in aggressive oils, fuels, hydraulic fluids, and corrosive environments.

Custom Design & R&D

Polypac offers bespoke diaphragm design and prototyping to meet unique stroke profiles, pressure ratings, thicknesses, and dynamic load requirements. Our team collaborates with universities and research institutions to refine compound formulations and geometries, delivering diaphragms that extend service life and reduce maintenance cycles.

Manufacturing & Quality Control

Manufactured in our 10,000+ m² facility with 8,000 m² of factory space, each diaphragm undergoes strict dimensional inspection, material analysis and functional testing. Advanced production equipment and in-house testing labs ensure consistent tolerances, surface finish, and fatigue resistance—meeting both ISO industry standards and bespoke customer specifications.

Applications & Benefits

Polypac diaphragms are ideal for hydraulic accumulators, pumps, valves, actuators, flow meters and chemical dosing systems. Benefits include leak-free separation, excellent elastic recovery, extended cycle life, and compatibility with challenging fluids—reducing downtime and total cost of ownership.

Why Choose Polypac

As an award-winning seal manufacturer, Polypac combines material science, precision manufacturing, and customer-first engineering. Whether you need a standard diaphragm or a fully custom sealing solution, our experts deliver robust designs, fast prototyping, and scalable production to meet industrial demands.

Contact & Next Steps

Discuss your diaphragm requirements with Polypac’s technical team for material recommendations, CAD-backed design reviews, and sample runs. Partner with us to secure dependable sealing performance for critical equipment.