• The Canalta Dual Chamber Orifice Fitting allows for accurate flow measurements, orifice plate inspection and changing without breaking apart or depressurizing the flow line.

All fittings come standard with a documentation package including hydro-test, function test, inner valve seal test, quality control inspection and material test reports. Trace ability is maintained in accordance with the ISO-9001 Quality Control Program. The fittings are manufactured within the guidelines of ASME 16.34 and ASME 16.5. When required, radiography, stress relief, ultra-sonic and liquid dye penetration tests can be performed with the relevant report submitted.

Parts matter, whatever your service environment. Our standard zinc-plated 4130 carbon steel internals offer superior corrosion protection and resistance to sulfide or hydrogen induced cracking, providing reliability and performance over a long service life. These parts conform to NACE MR0175 / ISO 15156:2003 specifications.

For extreme corrosive applications, such as wet H2S service, 316 stainless steel internals are available to protect against general and localized corrosion. Canalta has endeavoured to ensure that our parts and accessories offerings are interchangeable with the current industry standard orifice fitting brand, making Canalta Orifice Fitting internals suitable for re-builds and re-works of our competitors’ product lines.


The Soft Seat Valve Seal is available for all DBB Orifice Fitting models. Effective in all scenarios, this unique design enables a bubble-tight seal between the three chambers without the need for frequent valve lubrication. The specially machined seal channel helps prevent O-ring dislocation, and the O-ring seals incorporated are available in a wide variety of compositions. The DBB Orifice Fitting is also effective with standard grease seals.


HNBR O-ring Seals on the body sections and seal bar come standard with all Canalta DBB Orifice Fittings. This feature eliminates nuisance gasket maintenance and clamping bar screw breakage, while providing superior sealing capability. The O-rings incorporated are standard shelf sizes and can be supplied in a wide variety of compositions. Gaskets are also available and can be used when preferred or required.

Eccentricity of the Orifice Plate Carrier is fully accessible and adjustable from the exterior of the Orifice Fitting. Tamper proof sealing is done on request.

Product Questions

If you have any question, please feel free to contact us (+84) 0967-083-483 or email: marketing@nvicsco.com

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