These valves are suitable for low temperature or cryogenic operating conditions, with a particular selection of materials suitable for low temperatures and the extended bonnet design in order to keep the stem packing protected from cryogenic fluid. (Design standards i.e. BS6364, MESC SPE 77-200, ...)
Valves internally cladded are the alternative offered by ORION in aggressive service conditions. We can use valves made of carbon steel with the entire internal surfaces lined with INCONEL®, HASTELLOY® alloys or other weldable steels or CRAs. The latest technologies for weld depositing are available in ORION to provide a controlled layer of metal, able to improve the corrosive and erosive resistance of the valve parts.
The entire production range of ORION valves is also available with an internal lining of polymeric products, like FBE lining. The exposed surfaces (floating seat pockets and gasket seating areas) are overlaid with a stainless steel or CRA which ensures a long lasting performance of the valve and a total protection of the wetted surfaces.
ORION offers bellow sealed valves for lethal, toxic and highly flammable services in order to reach the total absence of emissions. The bellow creates a physical barrier that isolates the fluid from the external environment. Traditional stem packing arrangement is still kept in place as a second contingency barrier and to maintain fire safe design.
To keep the valve operating temperature under control, a jacketed execution is available. The valve is enclosed into a cast steel or fabricated jacket, creating an interstice all around the body. A heating fluid is forced to flow through this interstice and keeps the valve at a controlled temperature, in order to keep the process fluid’s viscosity low and avoid accumulation of material in the body. Usually sulphur and polymers application require this particular feature. The use of a jacket requires an increased flange size dimension, usually to the next size.
Extended drain, vent and injection piping is supplied for valves built for buried under-ground service.
Similarly to buried valves, this kind of equipment has a stem extension with an open-close indicator directly positioned above ground, close to the handwheel, in order to easily check the opening status of the valve.