DN800 Full Face Flanged Rubber Expansion Joint Connector
DN800.
The DN800 Full Face Flanged Rubber Expansion Joint Connector is a high-performance piping component designed to absorb vibration, noise, thermal expansion, and misalignment in large-diameter pipeline systems. With a nominal diameter of 800 mm, this expansion joint is engineered for heavy-duty industrial applications where reliable flexibility and structural integrity are critical. The full face flanged design ensures uniform sealing pressure across the entire flange surface, minimizing the risk of leakage and gasket blowout even under high stress conditions.
Delivery
FOB
minimum order
1 piece
Supply Ability
100piece / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $1.00 - US $10000.00 / piece
Construction and Materials
The connector consists of a molded rubber body reinforced with multiple layers of high-strength synthetic fabric or steel wire, depending on the application requirements. The rubber element is typically made from EPDM, NBR, Neoprene, or natural rubber, selected according to the conveyed medium, temperature range, and environmental conditions. EPDM offers excellent resistance to water, steam, ozone, and aging, while NBR provides superior resistance to oils and fuels. Neoprene is chosen for its flame retardancy and weather resistance.
The full face flanges are integrated into the rubber body during the molding process, creating a homogeneous and durable connection. The flanges are drilled to standard bolt patterns such as DIN, ANSI, JIS, or BS, allowing direct bolting to mating flanges without the need for additional gaskets in most cases. Back-up rings or retaining rings, usually made of galvanized steel or stainless steel, are embedded in the flange face to prevent the rubber from being squeezed out under compression.
Key Features
The full face flange design distributes bolt load evenly, reducing stress concentration and extending service life. The connector accommodates axial compression and extension, lateral deflection, and angular movement, which helps protect pumps, valves, and other equipment from damaging forces. It effectively reduces vibration transmission and structure-borne noise, improving the working environment and equipment reliability. The smooth inner bore minimizes turbulence and pressure loss, ensuring efficient flow. The product is available with different pressure ratings, typically PN10, PN16, PN25, or Class 150, to suit various system demands.
Technical Specifications
Nominal diameter: DN800 (800 mm). Pressure rating: PN10, PN16, PN25, or Class 150. Temperature range: from -20°C to +120°C depending on rubber material, with special compounds available for higher temperatures. Vacuum rating: typically up to 0.8 bar absolute, with vacuum support rings recommended for higher vacuum conditions. Axial movement: ±25 mm to ±50 mm depending on length and design. Lateral movement: ±20 mm to ±40 mm. Angular movement: up to 15 degrees. Flange standard: DIN, ANSI, JIS, BS, or custom. Rubber material: EPDM, NBR, Neoprene, natural rubber, or PTFE-lined. Reinforcement: nylon fabric, polyester cord, or steel wire. Retaining ring: galvanized steel or stainless steel 304/316.
Applications
This DN800 expansion joint is widely used in water treatment plants, sewage systems, power generation facilities, chemical processing plants, steel mills, cement plants, and marine engineering. It is particularly suitable for large-diameter pipelines in cooling water systems, circulating water systems, pump suction and discharge lines, and HVAC installations. The connector is also employed in desalination plants, district heating and cooling networks, and industrial wastewater treatment where vibration isolation and misalignment compensation are essential.
Installation Guidelines
Proper installation ensures optimal performance and longevity. The expansion joint should be installed in the pipeline with the flange faces aligned parallel to the mating flanges. Bolts should be tightened gradually in a diagonal pattern to avoid uneven stress. The connector should not be used to compensate for pipeline misalignment beyond its rated movement capacity. Pipe guides and anchors should be installed according to system design to prevent excessive movement from being transferred to the joint. During installation, the rubber body must not be damaged by welding sparks, sharp edges, or excessive tension. For vacuum applications, a vacuum support ring is recommended to prevent collapse of the rubber body.
Quality Assurance
Each DN800 full face flanged rubber expansion joint connector undergoes rigorous quality control, including dimensional inspection, pressure testing, and material verification. The product complies with international standards such as ISO 9001, CE, and API 610 where applicable. Third-party inspection certificates can be provided upon request. Custom designs, special rubber compounds, and alternative flange drilling patterns are available to meet specific project requirements.
The connector consists of a molded rubber body reinforced with multiple layers of high-strength synthetic fabric or steel wire, depending on the application requirements. The rubber element is typically made from EPDM, NBR, Neoprene, or natural rubber, selected according to the conveyed medium, temperature range, and environmental conditions. EPDM offers excellent resistance to water, steam, ozone, and aging, while NBR provides superior resistance to oils and fuels. Neoprene is chosen for its flame retardancy and weather resistance.
The full face flanges are integrated into the rubber body during the molding process, creating a homogeneous and durable connection. The flanges are drilled to standard bolt patterns such as DIN, ANSI, JIS, or BS, allowing direct bolting to mating flanges without the need for additional gaskets in most cases. Back-up rings or retaining rings, usually made of galvanized steel or stainless steel, are embedded in the flange face to prevent the rubber from being squeezed out under compression.
Key Features
The full face flange design distributes bolt load evenly, reducing stress concentration and extending service life. The connector accommodates axial compression and extension, lateral deflection, and angular movement, which helps protect pumps, valves, and other equipment from damaging forces. It effectively reduces vibration transmission and structure-borne noise, improving the working environment and equipment reliability. The smooth inner bore minimizes turbulence and pressure loss, ensuring efficient flow. The product is available with different pressure ratings, typically PN10, PN16, PN25, or Class 150, to suit various system demands.
Technical Specifications
Nominal diameter: DN800 (800 mm). Pressure rating: PN10, PN16, PN25, or Class 150. Temperature range: from -20°C to +120°C depending on rubber material, with special compounds available for higher temperatures. Vacuum rating: typically up to 0.8 bar absolute, with vacuum support rings recommended for higher vacuum conditions. Axial movement: ±25 mm to ±50 mm depending on length and design. Lateral movement: ±20 mm to ±40 mm. Angular movement: up to 15 degrees. Flange standard: DIN, ANSI, JIS, BS, or custom. Rubber material: EPDM, NBR, Neoprene, natural rubber, or PTFE-lined. Reinforcement: nylon fabric, polyester cord, or steel wire. Retaining ring: galvanized steel or stainless steel 304/316.
Applications
This DN800 expansion joint is widely used in water treatment plants, sewage systems, power generation facilities, chemical processing plants, steel mills, cement plants, and marine engineering. It is particularly suitable for large-diameter pipelines in cooling water systems, circulating water systems, pump suction and discharge lines, and HVAC installations. The connector is also employed in desalination plants, district heating and cooling networks, and industrial wastewater treatment where vibration isolation and misalignment compensation are essential.
Installation Guidelines
Proper installation ensures optimal performance and longevity. The expansion joint should be installed in the pipeline with the flange faces aligned parallel to the mating flanges. Bolts should be tightened gradually in a diagonal pattern to avoid uneven stress. The connector should not be used to compensate for pipeline misalignment beyond its rated movement capacity. Pipe guides and anchors should be installed according to system design to prevent excessive movement from being transferred to the joint. During installation, the rubber body must not be damaged by welding sparks, sharp edges, or excessive tension. For vacuum applications, a vacuum support ring is recommended to prevent collapse of the rubber body.
Quality Assurance
Each DN800 full face flanged rubber expansion joint connector undergoes rigorous quality control, including dimensional inspection, pressure testing, and material verification. The product complies with international standards such as ISO 9001, CE, and API 610 where applicable. Third-party inspection certificates can be provided upon request. Custom designs, special rubber compounds, and alternative flange drilling patterns are available to meet specific project requirements.
