Butterfly Valve Seal – Product Introduction
A butterfly valve seal (also referred to as a valve seat or sealing ring) is the critical component that ensures tight shut-off between the rotating disc and the valve body. Unlike standard O-rings or gaskets, butterfly valve seals must accommodate the rotational motion of the disc while maintaining a leak-tight seal across a wide range of pressures and temperatures. They are designed to engage the peripheral sealing surface of the disc when the valve is closed, effectively blocking the fluid path.
We produce seals for all major butterfly valve configurations:
Concentric (rubber-lined) valve seals – The most common type; elastomeric seals that mate with a rubber-lined valve body. Produced via injection or compression molding.
High-performance (PTFE) valve seals – PTFE seals with metal reinforcement or spring-energized designs for higher pressure ratings and corrosive service.
Triple-offset valve seals – Sandwich-construction seals combining graphite and metal layers for extreme temperatures and critical isolation services.
Bespoke/custom profiles – Engineered to your specific valve dimensions and operating conditions.
Key Technical Specifications
Our standard butterfly valve seals are manufactured to the following parameters-all customizable upon request:
| Parameter | Typical Range | Remarks |
|---|---|---|
| Size Range | ½ inch to 42 inches (and larger upon request) | We accommodate both small and large-diameter valves. |
| Temperature Range | –80°C to +300°C (material-dependent) | EPDM: -40°C ~ +120°C; FKM: up to 200°C; Graphite: up to 550°C. |
| Pressure Range | Vacuum to high-pressure service | Custom-engineered for specific pressure requirements. |
| Manufacturing Processes | Injection molding, compression molding, CNC machining | Full in-house capability for consistent quality. |
| Material Approvals | FDA, WRAS, DVGW, NSF, KTW, REACH, NORSOK, API 6A | We supply certified materials for regulated industries |
We manufacture butterfly valve seals in a wide range of high-performance materials, each suited to specific operating conditions:
| Material | Key Properties | Typical Applications |
|---|---|---|
| PTFE (Teflon®) | Low friction, excellent chemical resistance, wide temperature range; self-lubricating. | Chemical processing, corrosive media, high-purity applications. Can be spring-energized for enhanced sealing. |
| EPDM | Excellent ozone, UV, and weathering resistance; good for water and steam. | Water treatment, HVAC, outdoor installations, general industrial use. |
| NBR | Outstanding oil and fuel resistance. | Oil & gas, hydraulic systems, fuel handling. |
| FKM (Viton®) | High-temperature resistance (up to 200°C+) and chemical compatibility. | Aggressive chemical environments, high-heat applications. |
| Silicone | FDA-compliant grades available; excellent flexibility at low temperatures. | Food processing, pharmaceutical, medical devices. |
Why Choose Us – We Are the Factory
| Advantage | What It Means for You |
|---|---|
| Complete In-House Production | Full quality control, competitive pricing, and reliable delivery. No middleman markups. |
| Wide Material Portfolio | Access to approved materials with FDA, WRAS, DVGW, NORSOK, API 6A certifications. |
| Engineering Support | 3D CAD design, reverse engineering, material selection, and custom profile development. |
| Flexible Order Quantities | Prototypes, small batches, and high-volume production all accommodated. |
| Global Export Capability | Experienced in international logistics to deliver worldwide. |
| ISO 9001:2015 Certified | Quality management system that meets international standards |
As a genuine factory, we control every step of production:
Material Compounding – In-house formulation of elastomer blends for precise property control.
Precision Molding – Injection or compression molding for consistent dimensions and flash levels below 0.10 mm.
CNC Machining – High-precision finishing of critical sealing surfaces and complex profiles.
Quality Inspection – 100% dimensional verification and leak testing to ensure bubble-tight performance.
Rapid Prototyping – No minimum tooling requirements-we support "one-offs" and production runs alike
Hot Tags: DN 80 HNBR Rubber Butterfly Valve Seal, china, manufacturers, suppliers, factory, customized, made in China, EPDM Rubber Part For Water Sealing, Rubber Oil Sealing Part, EPDM Foam Seal Strip, Molded NBR Rubber Sealing Part, Natural Rubber Bonded To Metal Sealing Part, Food Grade EPDM Rubber Sealing Part
