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Orifice Fittings and Meter Runs |
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| MODEL "SC" Single Chamber Orifice Fitting - Download PDF Version | ||
| The Canalta Single
Chamber Orifice
Fitting is designed and
constructed to allow
for ease of orifice plate
replacement or
inspection after
depressurization. The Canalta SC Orifice Fitting is a high quality, high accuracy orifice fitting manufactured in a wide selection of sizes and materials. These units are built to meet or exceed ASME and ANSI specifications as well as to comply with the requirements of the latest editions of AGA-3, 
ISO-5167and API-14.3. The fittings are available to meet the NACE
MR-0175 specification. Stainless Steel internals are also available to
meet extreme corrosive applications. |
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Orifice Plate Seal Assemblies |
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| 1. Type "K" Standard 2000 Edition Seal Assembly | ||
| This is the standard seal assembly supplied with all orifice fittings from sizes 2" through 8". This unit is used with a 0.562" seal gap for fitting sizes 2" thru 6" and with a 0.688" seal gap for 8" fittings. The single downstream seal function offers superior sealing capability while reducing seal damage during insertion. Plate Seal bypass tested down to 1" water column. It is comprised of an elastomer seal and one stainless steel retainer ring. Exacting and repeatable concentricity is maintained with the metal-to-metal contact throughout the entire circumference of the orifice plate to the plate carrier mechanism. | ||
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| 2. Dual Ring Orifice Plate Seal Assembly | ||
| Canalta Dual Ring Orifice Place Seal Assembly offers you (The Customer) an alternative
sealing device for those specific or unorthodox situations. This assembly is primarily used to upgrade the .688" seal gap (1985 Edition) orifice fitting bodies to comply with the latest editions of AGA-3 and ISO-5167 but is also available for 0.562" gap fittings (2000 Edition) per customer request. The seal assembly simply mounts into place in the existing plate carrier. It is comprised of a stainless steel plate holder, retainer ring and standard sized O-Ring seals which are available in a variety of compositions. A positive seal is established with the orifice plate and the seal surfaces of the orifice fitting body utilizing the "inner and outer O-Ring" design. Plate seal bypass tested down to 1" water column. When ordering the Dual Ring Orifice Plate Seal Assembly please specify 0.688" seal gap (1985 Edition) or 0.562" plate seal gap (1991 / 2000 Edition). |
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| 3. Teflon Snap Seal | ||
| The Teflon Snap Seal Provides Positive Plate Sealing in the harshest of process environments. The
two piece design snaps over the orifice plate without the use of metal clips or retainers. A
specially designed recess absorbs the insertion pressures minimizing
permanent compression and distortion. The raised section adjacent to the recess creates a positive seal against the orifice plate preventing bypass leakage. These two unique design features enhance seal performance while extending the life expectancy of the seal assembly. |
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| Specifications | |
| Design | Orifice Fittings supplied in Canada are built in accordance with the ABSA Quality Control Program and carry a CRN registration number. Industry Canada Approval Number AF-0014 In compliance with ASME 16.34 and ASME 16.5, ASTM Specifications, AGA-3 Latest Edition and ISO-5167 |
| Body Materials | SA216 WCB, SA352 LCC or A351 CF8M |
| Internal Parts | AISI 4130 Carbon Steel, 316 or A351 CF8M Stainless Steel |
| ANSI Class and Sizes | 2" through 24" 150 through 900 ANSI Raised Face Flange All 600, 900 and 1500 Flanges are also available in RTJ Face Flange All sizes and ratings available in: Flangeneck Design (Welding Neck Upstream, Flange Downstream) Flanged Both Ends Welding Neck Both Ends |
| Internal Bore Sizes | 40, 60, 80, 100, 120, 160 and Custom Sizes |
| Sealing Compounds | Seal Bar: HNBR O-Ring Standard, Gasket Optional Orifice Plate Seals: Type "K" 2000 Edition: Formed HNBR Seal on a 316 SS Retainer Ring Dual Ring Assembly: HNBR O-Rings Standard on a 316 SS Retainer Ring Assembly Teflon Snap Seal: Two Piece Virgin Teflon |
| Line Bore I.D. Tolerance | In conformance with AGA-3 and ISO-516 Latest Editions |
| Eccentricity Repeatability | In conformance with AGA-3 and ISO-516 Latest Editions |
| Tap Connections | Two ½" NPT per side standard, two ½ NPT additional per side optional (TT) 2" and 3" fitting sizes center bored to .375" inside diameter 4" and above fitting sizes center bored to .500" inside diameter Tolerance: +/- 1/64" |
| Orifice Plate Seal Gap | 2" through 6" = 0.562", 8" through 14" = 0.688", 16" through 20" = 0.813", 24" through 26" = 0.875" |
| Operating Shaft Location | Shafts are a feature only on 8" and above sizes Standard on left hand side on fitting sizes up to and including 16" Dual operation on 20" and above |
| Operating Temperature | Standard at -20 to 100 Deg. F, Optional -40 to 1200 Deg. F |
| Operating Position | Vertical or Horizontal |
| Conformance | ||||
| All fittings come standard with a documentation package including hydro-test, functional test, inner valve seal test, quality control inspection report 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 penetrate tests can be performed with the relative report submitted. | ||||
| Reporting | ||||
| An AGA 2000 inspection report is included with the purchase of every fitting. The documented tests include: | ||||
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| Special Features | ||||
| All Single Chamber Orifice Fittings come standard with HNBR O-ring seals on the seal bar. 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 can also be used when preferred or required. | ||||
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| Ordering Information | ||||
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