3/4''-10'' PTFE Lining Stainless Steel Metal Bellows Expansion Joint Compensator
3/4''-10''
This PTFE-lined stainless steel metal bellows expansion joint compensator is engineered to absorb thermal expansion, vibration, and pipe misalignment in aggressive fluid handling systems. The wetted surfaces are fully lined with virgin PTFE, combining the chemical resistance of fluoropolymer with the mechanical strength and pressure capability of a stainless steel bellows. It is available in nominal sizes from 3/4 inch through 10 inch and is suitable for applications where corrosive media would attack unprotected metal components.
Delivery
FOB
minimum order
1 piece
Supply Ability
100piece / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $25.00 - US $500.00 / piece
Construction and Materials
The core is a precision-formed stainless steel bellows, typically made from 304, 316, or 321 stainless steel depending on the service environment. The bellows is protected by an internal PTFE liner that isolates the process fluid from the metal substrate, preventing corrosion and extending service life. End connections are available in flanged, threaded, or welded configurations to match existing piping. Optional external braiding or a protective cover can be supplied for applications involving higher pressure or mechanical abuse. Reinforcing rings, limit rods, and tie rods are available to control movement and protect the bellows from over-extension or compression.
Key Features
The PTFE lining provides excellent resistance to acids, bases, solvents, and oxidizing agents, making the compensator suitable for chemical processing, pharmaceutical production, and high-purity fluid systems. The stainless steel bellows offers high fatigue resistance and reliable performance under cyclic thermal loading. The assembly is compact and lightweight relative to its pressure rating, reducing structural loads on piping supports. It accommodates axial, lateral, and angular movement, which helps minimize stress at pump connections, tank nozzles, and heat exchanger inlets. A smooth, non-stick PTFE bore also reduces friction loss and prevents product accumulation.
Technical Specifications
Nominal sizes range from 3/4 inch to 10 inch. Pressure ratings vary with size and configuration, generally covering PN10, PN16, and PN25, with higher ratings available on request. Operating temperature limits depend on the PTFE liner and typically range from -20°C to 200°C, while the stainless steel bellows can withstand higher temperatures if the liner is replaced with a suitable alternative. Movement capabilities include axial compression and extension, lateral offset, and angular deflection, with values specific to each size and bellows design. Flange standards can be supplied to ANSI, DIN, JIS, or EN specifications.
Applications
Typical uses include chemical feed lines, acid transfer systems, pharmaceutical process piping, semiconductor wet benches, water treatment plants, and any corrosive service requiring vibration isolation and thermal compensation. The compensator is particularly effective where piping connects to rotating equipment such as pumps or where temperature fluctuations cause significant pipe movement.
Installation Notes
Proper alignment during installation is essential to avoid unnecessary stress on the bellows and liner. Anchor and guide points should be positioned according to the system design to ensure the compensator absorbs movement as intended. The unit should not be used to compensate for piping misalignment during construction. Inspect the PTFE liner before installation to confirm there is no damage from shipping or storage.
Ordering Information
To request a quotation, please specify nominal size, flange standard and pressure rating, bellows and liner materials, movement requirements, operating temperature and medium, and any optional accessories such as limit rods, braiding, or protective covers. Custom designs are available for non-standard dimensions and extreme service conditions.
The core is a precision-formed stainless steel bellows, typically made from 304, 316, or 321 stainless steel depending on the service environment. The bellows is protected by an internal PTFE liner that isolates the process fluid from the metal substrate, preventing corrosion and extending service life. End connections are available in flanged, threaded, or welded configurations to match existing piping. Optional external braiding or a protective cover can be supplied for applications involving higher pressure or mechanical abuse. Reinforcing rings, limit rods, and tie rods are available to control movement and protect the bellows from over-extension or compression.
Key Features
The PTFE lining provides excellent resistance to acids, bases, solvents, and oxidizing agents, making the compensator suitable for chemical processing, pharmaceutical production, and high-purity fluid systems. The stainless steel bellows offers high fatigue resistance and reliable performance under cyclic thermal loading. The assembly is compact and lightweight relative to its pressure rating, reducing structural loads on piping supports. It accommodates axial, lateral, and angular movement, which helps minimize stress at pump connections, tank nozzles, and heat exchanger inlets. A smooth, non-stick PTFE bore also reduces friction loss and prevents product accumulation.
Technical Specifications
Nominal sizes range from 3/4 inch to 10 inch. Pressure ratings vary with size and configuration, generally covering PN10, PN16, and PN25, with higher ratings available on request. Operating temperature limits depend on the PTFE liner and typically range from -20°C to 200°C, while the stainless steel bellows can withstand higher temperatures if the liner is replaced with a suitable alternative. Movement capabilities include axial compression and extension, lateral offset, and angular deflection, with values specific to each size and bellows design. Flange standards can be supplied to ANSI, DIN, JIS, or EN specifications.
Applications
Typical uses include chemical feed lines, acid transfer systems, pharmaceutical process piping, semiconductor wet benches, water treatment plants, and any corrosive service requiring vibration isolation and thermal compensation. The compensator is particularly effective where piping connects to rotating equipment such as pumps or where temperature fluctuations cause significant pipe movement.
Installation Notes
Proper alignment during installation is essential to avoid unnecessary stress on the bellows and liner. Anchor and guide points should be positioned according to the system design to ensure the compensator absorbs movement as intended. The unit should not be used to compensate for piping misalignment during construction. Inspect the PTFE liner before installation to confirm there is no damage from shipping or storage.
Ordering Information
To request a quotation, please specify nominal size, flange standard and pressure rating, bellows and liner materials, movement requirements, operating temperature and medium, and any optional accessories such as limit rods, braiding, or protective covers. Custom designs are available for non-standard dimensions and extreme service conditions.
