Durable Diaphragm Pump Seal
- YiDa
- Dalian,China
- 15-20 days
- 2 billion/year
1. We provide a large assortment of ready-made sealing accessory sets as well as entire repair kits for units, thus leaving behind the compatibility problems caused by piecemeal sourcing.
2. We have materials like NBR, EPDM, FKM, and PTFE that cater to different kinds of media and work conditions.
3. In relation to the type of material, our rubber diaphragm seals are capable of handling very low and very high temperatures - from -50°C up to 200°C. They also have a compression set as low as 10% which means they will keep sealing strongly for a long time and will not loosen or show signs of aging early.
Industrially, diaphragm pumps are often used to convey extremely abrasive and corrosive substances, for instance, sewage slurries, chemical solvents, or particle-rich mineral slurries. The diaphragms only last for so long before they start cracking because of the back-and-forth deformation at high frequencies (several times a minute). Meanwhile, valve balls and seats in constant collision cause the gasket to fail. Due to these problems, the production lines have to be shut down quite frequently for maintenance which, in turn, increases the use of spare parts and labor costs.
We provide a wide selection of rubber diaphragm seals made of different materials, like NBR, EPDM, FKM and PTFE. Our seals are also made through integrated molding processes. Besides the seals themselves, our offering includes all kinds of components - from diaphragms and valve balls to valve seats, piston seals, and flange gaskets. We are capable of matching materials exactly to the customer's media and operating conditions. Depending on the material, the tensile strength can be as high as 40 MPa and the seals can operate at temperatures from -50°C to 200°C.
Our Diaphragm Rubber Seals.
These items are accurately shaped from high wear-resistant and corrosion-resistant rubber by a molding process. The entire sealing kit consists of diaphragm, valve ball, valve seat, O-ring, piston seal, and flange gasket. They are essentially used in pneumatic and electric diaphragm pumps and provide great wear and impact resistance, reduce the possibility of leakage, and also contribute to longer service life.
| Parameter | Details |
| Product Name | Rubber Diaphragm Seals |
| Core Materials | NBR/EPDM/FKM/PTFE |
| Color | Black mainly,Other colors customizable |
| Size | Customizable based on pump model and medium conditions |
| Thickness | 0.5mm–20mm, customizable per customer requirements |
| Tolerance | ±0.1mm |
| Hardness | Shore A 60–90, customizable |
| Certifications / Standards | ISO9001, AS9100D, RoHS 2.0, UL-listed materials, FDA-compliant materials available for food-grade formulations |
| Applications | Suitable for pneumatic diaphragm pumps, electric diaphragm pumps, chemical pumps, sewage pumps, etc. |
| Elongation at Break | 200%–550%, mainly depends on material; please contact us for details |
| Temperature Resistance Range | NBR: -20°C to 80°C; EPDM: -45°C to 130°C; FKM: -20°C to 160°C; PTFE: -50°C to 200°C |
| Compression Set Rate | NBR: 15%-25% at 100°C for 22 hours; EPDM: 15%-30% at 125°C for 22 hours; FKM: 10%-20% at 200°C for 22 hours |
| Tensile Strength | NBR: 10-20 MPa; EPDM: 10-20 MPa; FKM: up to 40 MPa with special formulation; PTFE: 15-35 MPa |
| Working Pressure | Standard 0–0.8 MPa, max 1.2 MPa depending on pump model |
| Service Life | Up to 3000 hours continuous under standard operating conditions; actual life varies with medium, pressure, frequency, and temperature |
| Surface Treatment | Matte/Polished |
| Supporting Product Types | Diaphragm Sheets, Pump Body Gaskets, Inlet Seal Rings, Ball Valve Seals, Piston Sealing Rings, End Cover Gaskets, Complete Maintenance Seal Kits |
| Applicable Media | NBR: suitable for engine oil, diesel, general oils, and sewage media; EPDM: suitable for clean water, dilute chemical liquids, and sewage slurries; FKM: suitable for chemical solvents, oils, and most chemical media; PTFE: ultra-high corrosion resistance, suitable for highly corrosive chemical fluids |
Application Areas for Diaphragm Rubber Seals:
1. Industrial pneumatic/electric diaphragm pumps.
2. Wastewater treatment pumps (handling media containing impurities, fibers, and sludge).
3. Chemical transfer pumps (handling acids, alkalis, solvents, and corrosive chemical fluids).
4. Ink/coating pumps (handling high-viscosity fluids and pigment particles).
5. Slurry/mineral pulp pumps (handling highly abrasive solid-laden slurries containing sand, gravel, tailings, etc.).
6. Petroleum transfer pumps (handling crude oil, lubricating oil, diesel, and other petroleum-based liquids).
What Are the Key Advantages of These Durable Pump Valve Diaphragm Seals in Heavy-Duty Applications?
1. Complete set supply, simplifying maintenance.
Our rubber diaphragms are very tough , but they are just one of many components in our complete sealing kits that include diaphragms, valve balls, valve seats, O-rings, piston seals, and flange gaskets together with entire unit repair kits. This way, you won't have to deal with problems related to fragmented purchasing or mismatching of models.
2. Precise material matching for diverse operating conditions.
We provide a wide variety of materials such as NBR, EPDM, FKM, and PTFE, with each one engineered for certain media. Our clients have the opportunity to choose their exact material according to the real fluid they will be handling, thereby eliminating the risk of early breakdowns due to the use of incompatible materials.
3. Durability and low maintenance costs.
Our wear resistant pump valve diaphragms are also resistant to impact and fatigue aging. They not only tolerate high frequency reciprocating compression, but also resist abrasion and erosion of equipments by slurries with sand and particulates and therefore are very much resistant to breakage or cracking. Besides that, their low compression sets (NBR: 15%–25%; EPDM: 15%–30%; FKM: 10%–20%) make sure that they will not easily change their form, become hard or degrade even under repeated deformations.
These features make it possible to extend the replacement cycle of the seals and the reduced occurrence of equipment downtime lead to lower spare part consumption and labor maintenance costs for the long-term, uninterrupted plant operation.
4. High-performance specifications and flexible customization.
Our robust rubber diaphragm seals not only have great physical properties but also operate in a very wide temperature range (-50°C to 200°C depending on the material). They have very high tensile strength (up to 40 MPa) and low compression set (even down to 10%). Thanks to these characteristics, the sealing performance is quite stable even at high temperatures and the risk of leakage is greatly reduced.
We also provide flexible customization according to different pump models, operating media, dimensions, thickness, and hardness (Shore A 60–90). We strive to strike a balance between the overall compatibility and the requirements of highly specialized solutions for tough applications.
Why Has Yida Rubber Become a Partner to Renowned Brands?
Founded in 2006, Yida Rubber is proud of its core team that collectively has more than 30 years of manufacturing experience. Today, Yida Rubber runs its business on 37,000 square meters of land, engages 450 people, and is capable of manufacturing more than 2 billion units per year. By relentlessly pursuing intelligent and environmentally friendly production methods, the company has secured AS9100D, ISO 9001, ISO 14001, IATF 16949 certifications, and CNAS laboratory accreditation.
Our Partnerships:
We have forged lasting partnerships with internationally acclaimed companies as SMC, Omron, Siemens, and Panasonic on top of that our outstanding product quality and service standards helped us win SMC's "Excellent Supplier of the Year" award in 2023 and also be certified as "Global Strategic Partner" by Omron. Such achievements not only prove the great extent of recognition but also the longstanding trust industry-leading clients have in our wide range of competences.
Exhibitions We Have Participated In:
In June 2025 our company was among those who attended the 14th Shanghai International Long-Duration Energy Storage Technology Conference where a total of 927 companies exhibited their products and services. At our booth, we displayed our rubber seals specially produced for major parts like pumps, valves, piping, and stack end plates of flow batteries. Our products have been reaching not only European market but also many countries of Southeast Asia through these type of events.
Delivery:
Minimum order quantity (MOQ) is 1,000 units; we can deliver standard products within 15 days after confirmation of an order. For personalized, tailor-made products relaxation time is to be discuss. We work with land, sea, and air shipping modes; factory packaging includes resealable bags packed inside corresponding cartons.
FAQ:
1. Why are diaphragm seals prone to frequent damage?
Usually this happens when a unit is operated under multiple stress conditions, there is a mismatch between the sealing material and the medium conveyed, or the installation has not been done properly.
2. How often should diaphragm seals be replaced?
We suggest examining them monthly or every 500 hours of usage and replacing them right away if you find cracks, toughening, changes, or leaks. Although there is no compulsory replacement timetable, it would be unwise to hold on to them until they break down completely before putting in new ones.
