Orifice Plate manufacture at Techno-Flow is quality controlled from the selection of new material to the packaging of the finished product.
RING-JOINT ORIFICE PLATE HOLDERS
Ring Joint Holders (RTJ's) are fitted with Orifice Plates and are used with Ring-Joint Orifice Flanges. The Oval Form is standard. Plate Holders have hold-down screws to keep the plate in the holder or can be a one-piece ring joint holder with integral orifice plate.
ONE PIECE RING JOINT HOLDER WITH INTEGRAL ORIFICE PLATE
TWO PIECE RING JOINT HOLDER WITH BOLTED DOWN ORIFICE PLATE
Techno-Flow Accessories offer a comprehensive range of precision attachments to compliment the manifold series. These accessories are aimed at easing the design and maintenance engineer's tasks respectively.
Techno-Flow Orifice Plate Guide
BORE AND BEVEL
The bore and bevel is the standard method of limiting the plate edge thickness. The bevel is machined at a 45° angle to the desired edge thickness. Unless otherwise specified, plates will be bevelled to 1/50 of the line I.D. or 1/8 of the orifice bore, minimum governing.
BORE AND COUNTER BORE
The Bore and Counter bore is a special method in limiting the plate edge thickness. Instead of beveling at the normal 45°, the plate is counter bored to the desired edge thickness.
Segmentally bored orifice plates are provided for measurements where solids are entrained in a gas or liquid flow stream. The circular portion of the bore is inscribed within a circle which is normally 98% of the pipe diameter. The segmental opening may be placed either at the top or bottom of the pipe. Industries using these bores include sewage treatment, steel, chemical, water conditioning, paper and petrochemical
Eccentrically bored plates are plates with the orifice off-center, or eccentric, as opposed to concentric. The bore of the eccentric orifice is normally inscribed in a circle which is 98% of the pipe diameter, so that solids or slurries may pass through. Eccentric orifice plates are used in many industries including heavy and light chemicals, steel, paper, atomic and petrochemicals.
The Quarter-Round, or Quadrant bore, is an orifice with the inlet edge rounded. The radius of the quarter-circle bore is a function of the orifice-to-pipe ratio (d/D). Thickness at the throat is equal to the radius. This bore is specifically designed for fluids of high viscosity, such as heavy crude's, syrups and slurries. Quarter-Round bores are recommended for viscous flows having Reynolds Numbers below 100,000.
Techno-Flow also provides a service to do calculations on orifice and restriction orifice plates using the Flowel sizing program.
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