Polypac Diaphragm Seal — Durable Custom Sealing Solutions

Polypac Diaphragm Seal — Reliable, Custom Sealing

Polypac diaphragm seals protect pressure instruments and hydraulic systems where media is corrosive, abrasive, or at extreme temperatures. Designed for long-term, leak-free performance, our diaphragm seals combine material science and precision manufacturing to give stable measurements and safe operation.

Why choose Polypac?

We are a scientific and technical hydraulic seal manufacturer with a dedicated factory over 10,000 m² and 8,000 m² production space. Since 2008 we have specialized in advanced sealing materials—starting with filled PTFE (bronze, carbon, graphite, MoS₂, glass) and expanding to elastomers like NBR, FKM, silicone, EPDM, and FFKM. Our modern production and testing equipment, and collaborations with universities and research institutes, ensure consistent quality and tailored solutions.

Key benefits

- Corrosion and chemical resistance: PTFE and filled PTFE linings isolate instruments from aggressive media.
- Customizable: Sizes, shapes and materials tailored to specific pressure, temperature and media.
- Reliable performance: Precise molding and strict testing reduce leaks and maintenance.
- Wide material choice: From soft elastomers for dynamic seals to reinforced PTFE for harsh conditions.

Typical applications

Diaphragm seals are ideal for pressure gauges, transmitters and switches in industries such as chemical processing, oil & gas, food & beverage, pharmaceuticals, power generation and hydraulic systems. They excel where direct contact with process fluid would damage sensors or contaminate the product.

Quality & service

Polypac offers fast prototyping, small-batch and large-scale production with thorough inspection at every step. We value customer needs and provide technical consultation to match the best material and design to your process. Our goal is durable, cost-effective seals that minimize downtime.

Contact Polypac for a tailored diaphragm seal solution — engineered for safety, accuracy and long service life.