High Quality Orifice Plates

ORP-V19 series are differential pressure primary devices used to produce a fluid restriction in a pipeline. The differential pressure across the orifice plate is proportional to the square of the fluid velocity. Orifice plates are used in a wide range of pipe sizes from small to large diameters and are effective in both low- and high-pressure services.

The bore diameter can be calculated by our engineering department or specified by the customer. The handles and the plates are machined to meet the specified finish. The standard material for an orifice plate is usually 316 Stainless Steel, but a variety of other materials such as 304 Stainless Steel, Monel and Titanium are also available for special applications.

Bore & Bevel

Counter Bore Orifice

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 beveled to 1/50 of the line I.D. or 1/8 of the orifice bore, minimum governing.

BORE AND COUNTERBORE

The Bore and Counterbore is a special method to limit the plate edge thickness. Instead of beveling at the normal 45 degrees, the plate is counterbored to the desired edge thickness.

SEGMENTAL

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 at the top or the bottom of the pipe. Industries using these bores include, sewage treatment, steel, chemical, water conditioning, paper and petrochemical.

ORIFICE PLATE WITH HOLDER

Ring Type Joint (RTJ) Orifice Plate Holders are offered in both oval and octagonal type for high pressure applications. Orifice Plates are fixed in the plate holder using overlapping lock screws to avoid drilling into the orifice plates, unless otherwise specified. The plate is designed to ANSI B 16.20 for the use with RTJ gaskets fitted in flanges.

ECCENTRIC

Eccentrically bored plates are plates with the orifice off center, or eccentric, as opposed to concentric. The bore of the eccentric orifice normally is inscribed in a circle that is 98% of the pipe diameter, so the solids or slurries may pass through. Eccentric orifice plates are used in many industries including heavy and light chemicals, steel, paper, atomic, and petrochemicals.

ORIFICE PLATE WITH HOLDER

Ring Type Joint (RTJ) Orifice Plate Holders are offered in both oval and octagonal type for high pressure applications. Orifice Plates are fixed in the plate holder using overlapping lock screws to avoid drilling into the orifice plates, unless otherwise specified. The plate is designed to ANSI B 16.20 for the use with RTJ gaskets fitted in flanges.

Technical Data Table

Standard sizes : 1” to 24”
Hydrostatic Test Hydrostatic Test (1.5 x design pressure for 10 minutes)
Plate / Flanges 1-) Carbon steel 2-) Stainless steel AISI 316 –L or 304-L 3-) Customer Specification
Flange Tap Type 1/2-in. NPT Flange Taps / 1/2-in. Socket Flange Taps
End Flange : DIN Standards & ANSI Standards : Other Standards (on request)
Orifice Plate Sealing Teflon, Silicon, EPDM, Synthetic Rubber, Graphite and others (Selected according to the service)
Chosen Plate Thickness Depends on the line Size & Service Parameters