dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Polypac Elastomer Diaphragms

Polypac Elastomer Diaphragms are durable, customizable rubber seals designed for hydraulic, pneumatic, and industrial applications. Manufactured with advanced equipment and strict quality control, they offer excellent chemical and temperature resistance and long service life.

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Product Details

Overview

Polypac Elastomer Diaphragms are engineered rubber seals that provide reliable performance for hydraulic, pneumatic and industrial systems. Backed by Polypac’s 10,000+ m² production base and advanced testing equipment, these diaphragms combine proven materials and precise manufacturing to meet demanding working conditions.

Key Benefits

Durability and Reliability

Our elastomer diaphragms are made to last. They resist abrasion, fatigue and repetitive flexing, reducing downtime and maintenance costs. Ideal for pressure control, actuators and pumps, they keep systems stable under repeated cycles.

Chemical and Temperature Resistance

Available in materials such as NBR, FKM, silicone, EPDM and FFKM, Polypac diaphragms handle a wide range of fluids and temperatures. Choose the right compound for oil, water, steam or aggressive chemicals to ensure safe, long-term operation.

Applications

Polypac Elastomer Diaphragms are used in hydraulic accumulators, valves, meters, actuators and process equipment across industries including oil & gas, automotive, water treatment and industrial automation. Their flexibility and sealing performance make them suitable for both standard and harsh environments.

Materials & Customization

Material Options

We offer a full range of elastomers and specialty materials. Starting from PTFE-filled seals to modern rubber compounds, our materials are selected to match your application needs for compatibility and longevity.

Custom Solutions

Polypac specializes in custom diaphragms: tailored shapes, thicknesses, durometers and bonded assemblies. With in-house R&D and long-term partnerships with universities, we can develop solutions for special working conditions and unique designs.

Quality & Service

Founded in 2008, Polypac combines industry experience with advanced production and inspection tools. Our factory ensures consistent quality control, fast prototyping and scalable production. We prioritize clear communication, on-time delivery and technical support so you get a diaphragm that fits and performs.

Get Started

Contact Polypac for samples, drawings evaluation or a quote. Tell us your operating conditions and we’ll recommend the best material and design for dependable sealing performance.

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Q&A

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

About other questions pls contact me directily.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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