Industrial valves:
technical advice, supply & support

Check valves prevent backflow and, when the valve design is correctly matched to the application, protect pipeline systems against water hammer. Conversely, a poorly chosen check-valve design can significantly increase the risk of water hammer. See our note on water hammer for more on this. Multiple design types are available from EURAD — selected based on application requirements such as media, closing dynamics and volumetric flow.

EURAD’s standard offering for metal-to-metal sealing is the 5-offset butterfly valve — delivering tight shut-off and long service life under demanding mechanical and thermal load. Suited to high-temperature steam, condensate and process-gas duties — and equally to cryogenic, liquefied-gas service such as LNG, hydrogen and ammonia — where soft-seated isolation is not an option. EURAD holds the Benelux distribution exclusivity for the 5-offset design, the result of decades of manufacturer-side geometric refinement.

Cryogenic butterfly valve solution for LNG truck-loading, featured in Valve World Magazine in 2017.

Why triple-offsets leak at minus 196°C Valve World Magazine · May 2017 · 2.2 MB PDF

EURAD’s Managing Director profiled on the geometric principles behind metal-to-metal leakage under cryogenic conditions, specifically LNG as the medium in the accompanying article. The principle has since been further refined manufacturer-side into the 5-offset geometry.

EURAD’s control valves are quarter-turn butterfly valves — centric designs for pure throttling duties, and the 5-offset where tight shut-off must be combined with flow modulation. Where standard geometries fall short the valve design is modified for the specific application — as with a valve we supplied for an LNG truck-loading installation, where leakrate-A sealing had to coexist with continuous throttling at cryogenic conditions. Available across temperature ranges from −270°C to +1800°C and pressure ranges from vacuum to 100 Barg.

Air-release valves prevent airlocks and system inefficiencies in water and process pipelines. EURAD recommends fulfilling these functions with two separate units — an air-release valve and an adjustable air-admission valve — rather than a single combined valve. The air-release valve’s float-ball mechanism continuously vents trapped air during operation, and it deliberately does not admit air into the line, thanks to a small check valve on the air-release orifice. The adjustable air-admission valve, which opens only at a preset vacuum threshold, lets air in under control during vacuum conditions — protecting the rising main against vacuum damage and preventing siphoning. EURAD advises on and supplies air-release and air-admission valves that function autonomously on what happens in the line, so that even during a regional power outage the rising main and the pumps stay protected.

Pressure relief valves safeguard pipeline systems against overpressure and other risks, enhancing safety and extending system service life. Fast response to pressure changes with proven reliability in the most demanding process conditions.

For applications where standard product ranges fall short — LNG and cryogenic duties, extreme high or low temperatures, tight shut-off classifications where the application demands it, demanding flow regulation and other specialised conditions — EURAD specifies, sources and supplies the valve matched to the system. Recent custom work includes the LNG bypass integration for circular flow during main-line shut-off, and bespoke butterfly designs for chemical-plant duties. The catalogue is a starting point; the right valve is the one that fits.