Fittings

SIELC Advanced Fitting Design

Several fitting styles are commonly used in HPLC.

They differ in material of the fitting body, the tip, the head design, the length, and the price. They can be reusable or single-use. It is very important to consider the pressure limit in which the fitting can reliably hold. Recently, with the introduction of ultra-high-pressure chromatography, the requirements for reliable ultra-high-pressure connections became even more important.

SIELC has introduced two new styles of HPLC fittings

These two fittings are convenient replacements for all styles of commonly used fittings (see table below). One fitting style covers pressure range up to 5000 psi (350 bar) for regular HPLC applications. The other fitting design covers pressures up to 14,000 psi (1000 bar) for ultra-high-pressure applications. These fittings are not only less expensive than comparable fittings from other vendors, but they offer additional functional benefits.

Replacement table of popular HPLC fittings with only two SIELC advanced fittings
	Recommended as replacement		Can be used as replacement		Not recommended as replacement
Most popular HPLC fittings		Description
		Metal one-piece design for high and ultra-high-pressure applications. Non-removable. Wrench is required for installation.
		Two-piece metal fitting with extended design for limited access installations. Can be used for high and ultra-high-pressure applications. Non-removable ferrule. Wrench is required for installation.
		Two-piece metal fitting design with removable plastic ferrule for high-pressure applications. Wrench is required for installation.
		Three-piece metal fitting design with removable plastic-in-metal ferrule for high and ultra-high-pressure applications. Wrench is required for installation.
		Two-piece metal fitting design with non-removable metal ferrule for high and ultra-high-pressure applications with plastic capillary tubing. Wrench is required for installation.
		Metal two-piece design for high and ultra-high-pressure applications. Non-removable ferrule, removable fitting. Wrench is required for installation.
		Plastic one-piece design for high-pressure applications. Removable finger-tight fitting for limited access installations with small head size.
		Plastic one-piece design for high-pressure applications. Removable finger-tight fitting for limited access installations with regular head size for comfortable installation.
		Plastic one-piece design for high-pressure applications. Removable finger-tight fitting with regular head size for comfortable installation.
		Plastic finger-tight fitting, removable two-piece design for high-pressure applications. Ferrule has a dual gripping design to increase pressure limit. Regular head size for comfortable installation.
		One-piece plastic fitting for high-pressure applications with extended design for limited access installations. Wrench is required for installation.
		One-piece plastic fitting for high-pressure applications. Wrench is required for installation.
		Plastic finger-tight fitting, removable two-piece design for high-pressure applications. Regular head size for comfortable installation.
		Four-piece metal fitting with integrated adjustable metal capillary. Can be used for high and ultra-high-pressure applications. Removable ferrule. Finger-tight installation.
		One-piece plastic fitting for low-pressure applications. Finger-tight installation.