Details

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1. Aluminium KF Chain Clamp

Description
The Aluminium KF Chain Clamp is a lightweight quick-release clamping solution for KF vacuum connections. Its low weight makes it suitable for applications where easy handling and frequent installation or removal are important.

Key Features

• Lightweight aluminium construction
• Quick-release KF connection
• Suitable for vacuum and pressure applications
• Available for NW10/16 to NW63
• Compatible with elastomer and metal sealing configurations
• Suitable for cryogenic applications

Specification

• Connection size: NW10/16, NW20/25, NW32/40, NW50, NW63
• Material: Aluminium
• Number of links: 3 to 6, depending on size
• Temperature range of KF system: approximately −271°C to +450°C, depending on configuration
• Vacuum performance depends on flange, seal and center-ring configuration

Typical Applications

• General vacuum systems
• Laboratory equipment
• Semiconductor equipment
• Cryogenic systems
• Vacuum process equipment
• Applications requiring lightweight components

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2. Aluminium Teflon®-Coated KF Chain Clamp

Description
The Aluminium Teflon®-Coated KF Chain Clamp combines the lightweight characteristics of aluminium with a Teflon® coating for applications requiring an additional protective surface finish.

Key Features

• Lightweight aluminium construction
• Teflon®-coated surface
• Quick-release installation
• Good choice for applications requiring a protective coated surface
• Available across the standard KF size range
• Compatible with KF sealing components

Specification

• Connection size: NW10/16 to NW63
• Material: Teflon®-coated aluminium
• Number of links: 3 to 6, depending on size
• Available with suitable KF elastomer or metal-seal configurations
• System temperature and pressure capability depend on the complete KF assembly

Typical Applications

• General vacuum equipment
• Laboratory vacuum systems
• Industrial vacuum systems
• Applications requiring a coated clamp surface
• Systems where lightweight quick-release components are preferred

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3. Nickel-Plated Steel KF Chain Clamp

Description
The Nickel-Plated Steel KF Chain Clamp provides a robust clamping solution with a nickel-plated steel construction. It is suited to applications requiring greater mechanical durability while maintaining the quick-release characteristics of the KF system.

Key Features

• Strong steel construction
• Nickel-plated surface
• Durable and suitable for demanding industrial environments
• Quick-release KF design
• Suitable for heated vacuum applications when used with the appropriate seal configuration
• Suitable for cryogenic applications

Specification

• Connection size: NW10/16 to NW63
• Material: Nickel-plated steel
• Number of links: 3 to 6, depending on size
• Suitable for elastomer and metal sealing systems
• KF system temperature capability depends on seal and configuration

Typical Applications

• Industrial vacuum systems
• Semiconductor equipment
• Heated vacuum systems
• Cryogenic applications
• UHV applications
• Production equipment requiring durable clamping components

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4. Stainless Steel KF Chain Clamp

Description
The Stainless Steel KF Chain Clamp is designed for demanding vacuum applications where corrosion resistance, durability and clean construction are important. It provides a robust quick-release connection for KF vacuum systems.

Key Features

• Stainless steel construction
• Excellent corrosion resistance
• Durable mechanical design
• Quick-release operation
• Suitable for UHV applications with appropriate seals
• Suitable for cryogenic applications
• Suitable for food and beverage applications where stainless-steel construction is required

Specification

• Connection size: NW10/16 to NW63
• Material: Stainless steel
• Number of links: 3 to 6, depending on size
• Compatible with elastomer and metal seals
• KF system vacuum capability can extend to approximately 1 × 10⁻¹¹ mbar with steel KF flanges and aluminium edge-type seals
• KF system pressure capability depends on configuration and size

Typical Applications

• Semiconductor manufacturing
• UHV vacuum systems
• Food & beverage processing
• Cryogenic systems
• Research laboratories
• Industrial vacuum equipment
• Applications requiring corrosion-resistant components

 

KF Chain Clamp Size & Torque Specification

EVAC's KF chain clamps are available in five standard size groups. The catalogue specifies the following dimensions and tightening torques.

KF Size	L (mm)	N (mm)	No. of Links	Elastomer Torque (Nm)	Metal Seal Torque (Nm)
NW10/16	115	60	3	1	2.5
NW20/25	125	70	3	1.5	3
NW32/40	135	85	4	2	4.5
NW50	152	105	5	2.5	5
NW63	160	120	6	2.5	5

 

Quick Comparison

Chain Clamp Type	Main Advantage	Typical Use
Aluminium	Lightweight	General vacuum and laboratory systems
Alu Teflon® Coated	Lightweight with protective coating	General/industrial vacuum systems
Nickel-Plated Steel	Mechanical durability	Industrial, heated and UHV systems
Stainless Steel	Corrosion resistance and robust construction	Semiconductor, food & beverage, UHV and industrial systems