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Brands Register products

Twin Ferrule Fittings H2-Lok

Functionally matched tolerances and consistent surface finish ensure leak-free pipe connections in both the high pressure and vacuum environments with Twin Ferrule Fittings.

Vibration and pressure surges are largely absorbed by the design of the clamping / wedge ring structure without any leakage.

Under heavy vibration the couplings maintain security at high pressures or vacuum. This is achieved by 4-efficient construction details:

The clamping ring with its spring-like formation dampens vibrations from the pipe network. Furthermore, it prevents transmission of the tightening torque of the nut on the wedge ring.
The forward wedge ring seals the pressing surfaces between fitting and pipe. Due to the taper in the housing the tapered ring is pressed onto the pipe, so that a constriction arises, whereby the tube is clamped pressure tight.
The silver-plated internal threads of the union nut is used to prevent seizure. This allows the multiple use of the same fitting and are therefore easy to undo.
A longer tube guide ensures an accurate tight fit between tubing and the housing, manufacturing tolerances ensure reliable centering of the pipe.

Key features

Using high grade stainless 1.4401; 1.4404 steels a long 'life' in an aggressive environment is ensured

H2 Lok fittings are laser engraved with the EC 79 Logo and unique Schwer Fittings number for full traceability

Easy installation

Great variety in metric and imperial range

Quality surface roughness due to modern manufacturing technology

Type of pre-assembly: no pre-assembly necessary

Repeat assembly: 25 times

Media application: hydrogen gas

Thermal limits: -40° C to +85° C

Construction mass / manufacturing standard: own factory standard

Pressure ranges: up to 350 bar

Available sizes:

From 6 mm to 16 mm
From ¼' to 1/2'

Material: 1.4404 / 1.4435

Degree Cone: 40°

Union nut thread type: UNF

Coating union nut: silver coated

Width across flats of union nut: metric or imperial

Tube type / specification:

sf 1.4435 seamless drawn, soft annealed
Metric or imperial

Structure/function of rings: twin ferrule, 2 rings system

Application areas

Transportation and automotive hydrogen applications.

Within electrolyser applications.

Connection of cylinders in distribution systems.

Within hydrogen fuel filling stations.

Within compressors and compressor installations

Suitable for use throughout the hydrogen supply chain, hydrogen generation, through transportation and to end user.

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Twin Ferrule Fittings H2-Lok