FKM Chemical Resistant Diaphragm
- YiDa
- Dalian,China
- 15-20 days
- 2 billion/year
FKM diaphragm temperature range: -20°C to +220°C; resistant to short-term peaks in temperature of up to 250°C.
Media resistance: Acid and alkaline reagents of different concentration levels, different types of organic solvents, oils, fuels, refrigerants, chemical products, corrosion-causing slurries, etc.
Physical properties: Very high tensile strength, good rebound stability, effective resistance to high frequency reciprocating flexing, and exceptional gas tightness.
When FKM rubber diaphragms are exposed to compound acids, alkalis, or solvents, they might experience swelling and molecular chain scission. As a result not only fluid leakage occurs but also high maintenance costs are incurred due to frequent replacement of diaphragms (since FKM diaphragms are costly).
Solution:
Depending on the chemicals involved such as strong inorganic acids, fuels, or concentrated solvents, we choose high-fluorine-content FKM (about 70% fluorine content) very carefully in order to resist media permeation at the molecular level. In combination with our unique fabric-reinforced vulcanization bonding technique, this guarantees that the FKM diaphragm for chemical processing not only possesses corrosion resistance but is also capable of withstanding fatigue.
Introduction to FKM Diaphragms for Chemical Processing:
Made from FKM (fluoroelastomer) material and processed by high-temperature compression molding, with the possibility of fabric reinforcement, these diaphragms are targeted at the use with highly corrosive fluids. Due to their resistance to acids, alkalis, solvents, and fuel, they are utilized as very durable elastic diaphragms for a variety of pumps, valves, etc. for their reliable performance without deformation, swelling or damage during long-term transport of corrosive media.
Chemical Resistant Fkm Diaphragm Specifications:
| Attribute Name | Details |
| Processing Service | Molding & Vulcanization |
| Brand Name | EDA |
| Model Number | As per the client's drawing |
| Material | FKM (Fluoroelastomer) |
| Hardness Range | 50° - 90° Shore A |
| OEM/ODM Service | Acceptable |
| Color | Common colors: Brown, green; custom colors available upon request |
| Operating Temperature | -20°C to +220°C; short-term heat resistance up to 250°C |
| Shape | Custom shapes available |
| Size | Standard sizes or custom dimensions based on drawings |
| Tolerance Standard | As per the customer's design |
| Quality | 100% inspection |
| Design Format | 2D & 3D drawings available |
| Compression Set | ≤ 20% (200°C x 22h) |
| Tensile Strength and Elongation at Break | Tensile strength approx. 10–15 MPa; elongation at break typically 150%–250%. Customizable upon request. |
| Fluorine Content/Grade | Grade A (Standard type, fluorine content approx. 66%): |
| Grade B (Chemical-resistant type, fluorine content approx. 68%): | |
| Grade F / GF (High-fluorine type, fluorine content approx. 70%): | |
| Grade GLT / GBLT (Low-temperature type): | |
| Performance Characteristics | Manufactured via integrated molding, the structure is dense and seamless, ensuring a tight seal and preventing leakage. |
| It offers excellent fatigue resistance; it remains stable and does not loosen under high-frequency reciprocating motion. | |
| It withstands high and low temperatures, maintaining consistent performance amidst thermal cycling, making it suitable for a wide range of operating conditions. Fabric-reinforced versions are available to enhance tensile strength and pressure-bearing capacity, making them suitable for high-pressure conveyance. | |
| Main Application Areas | Transport of corrosive liquids in the chemical industry, petroleum product transport, environmental wastewater treatment, fluid handling equipment for pharmaceutical chemicals, transport of corrosive media in new energy applications, precision laboratory metering equipment, industrial corrosion-resistant pneumatic control valves, etc. |
| Warranty | Provided the product is stored under the specified conditions (temperature <30°C, humidity <70%, protected from light), we offer a free replacement for any unopened product that fails due to material aging—provided the failure is not caused by human error and is confirmed upon inspection—within three years of the delivery date. Failures resulting from improper installation or use beyond the specified scope are not covered by the warranty. |
| Production Capacity | Monthly production exceeds 300 tons. |
| Lead Time | For standard sizes, the lead time is 15 days after order confirmation. The average production cycle for prototypes or first-article samples is 1–2 weeks; if mold development is involved, the production mold takes 10 days to manufacture; and the average lead time for mass production following sample approval is 2–3 weeks. |
| Packaging | Packed in a PE bag, then placed in a carton |
| Selling Units | Single item / 1 pc |
| Single Package Size | As per the buyer's request |
| Single Gross Weight | As per the buyer's request |
| Shipping Method | By sea, air, or express |
| Port of Loading | Dalian Port or as per the buyer's request |
| Certificates | IATF 16949 Automotive Quality Management System |
| AS9100D Aerospace Quality Management System | |
| ISO 14001 | |
| ISO 9001 | |
RoHS 2.0 REAC |
Industry Applications:
Chemical industry: Corrosive liquid transportation, petroleum product transfer, environmental wastewater treatment, pharmaceutical chemicals fluid handling equipment, new energy applications corrosive media transport, laboratory precision metering equipment, industrial corrosion-resistant pneumatic control valves, etc.
Technical Capabilities:
R&D Allowance: We have over 1,000 formulation systems of benchmark quality at our disposal, so we can reverse engineer a product to unlock the secrets of operating conditions and it is even possible to re-manufacture a product only from its technical specifications up to molding and beyond, which is a hallmark of our expertise.
Supply chain control: The dual-control system of imported raw materials together with the automated barcode traceability allow us to completely eliminate human error at the source. As a result, the consistency of the physical properties of each product batch is guaranteed.
Lean Manufacturing: Our technical team, backed by 20 years of experience, uses Makino (Japan) machining centers and other high-precision EDM equipment to produce machining tolerance as low as ±0.005mm on the most critical mold cavities.
Smart Quality Management: We have set up a three-layer protective mechanism that merges AI visual recognition, 2D precision measurement, and full manual verification. At the same time, we have rigorously implemented statistical quality control tools such as CPK, SC, and MSA.
About Yida:
The history of Yida started in 1993, and it finally got its official name of Dalian Yida Precision Rubber Products Co., Ltd. in 2006. Being a National High-Tech Enterprise, Yida not only specialized in basic rubber technology but also had strong R&D and manufacturing capabilities. It was also the first private company in Northern China to receive a national-level management excellence award.
Scale and Capacity: We operate an industrial park spanning 57,000 m², with a production facility area of 36,000 m².
Global Footprint: The Group comprises six holding subsidiaries and employs over 450 people. We operate three major manufacturing bases in Dalian, China, and an overseas plant in Vietnam, with R&D and marketing networks spanning Shanghai and Japan.
Production Capacity: Dalian factory has a monthly output capability of more than 300 tons. Our superior sealing products that meet international standards are exported to quite a few countries and regions such as the US, Germany, Russia, Saudi Arabia, Japan and France, industrial sectors in those areas being quite diverse.
Comprehensive Authoritative Certifications:
Yida’s compliance is confirmed by several international quality system certifications:
Main Certifications: AS9100D (Quality management for aerospace), IATF16949 (Automotive Industry), ISO 9001, and ISO 14001.
Environment & Compliance: RoHS 2.0, NSF/WRAS (drinking water grade), etc. Certifications: Quality management systems of AS9100D & ISO 9001:2015 are fully implemented.
Partners:
Yida keeps supplying dependable products and services worldwide customers from the industrial manufacturing, automation control, new energy, electrical equipment, and automotive components sectors, having signed long-term partnerships with many internationally renowned companies. Our customers cover a wide spectrum of industries such as automotive electronics, industrial automation, intelligent manufacturing, new energy, power equipment, and fluid control. They are, for example, Delphi Technologies, Alpine Electronics, Nidec, Siemens, Panasonic, Omron, SMC Corporation, CATL, China Electric Equipment Group, and Rongke Power.
After-sales Support:
Our confidence in quality is backed by data, and our commitment to customers is paramount:
Warranty Period: A comprehensive 36-month quality guarantee.
Replacement for Failure: Provided the product is stored according to specifications (T < 30°C, Humidity < 70%, kept sealed and away from light), Yida pledges a free, full replacement if material aging or failure occurs—through no fault of the user—within three years of delivery and upon verification.
Exhibition Highlights:
2025 Dalian International Industry Fair
With the vision of "Leading Sealing Technology, Connecting the World" in mind, Yida demonstrated how digitized factories can react to highly complex operating situations. We were among 900 industry giants present on-site to set the future of supply chains that can withstand disruptions.
2025 Shanghai Long-Duration Energy Storage Technology Exhibition
Being totally dedicated to the "carbon neutrality" sector, Yida introduced high-temperature and chemically resistant sealing matrices of the new generation. Meeting the strict long-term airtightness requirements for long-duration energy storage systems, these solutions help protect the reliable operation of the modern power grid.
