Orifice Plates

Orifice Plates – Paddle Types
INDUSTRY-STANDARD TYPES and CUSTOM CONFIGURED ORIFICE PLATES to YOUR REQUIREMENTS

An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate). Either a volumetric or mass flow rate may be determined, depending on the calculation associated with the orifice plate.

Every feature of Lambda Square Orifice Plates can be customized!

  • Materials available: 304 / 316 Stainless, MONEL, Exotics, Carbon Steel, Teflon, CPVC, and more
  • Available in RF (Raised Face) or RTJ (Ring Type Joint) configurations – Welding Neck / Slip-On / Threaded
  • Supplied with two 1/2" NPT tappings in each flange
  • Lambda Square Orifice Flange Unions are fabricated to ASME B16.36 requirements
  • Our Orifice Flange Union kits are available ready-to-install, complete nuts, bolts, screws, and gaskets
Every piece quality-checked.
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Support

Engineering, design and application support.

Customization

Fabricated to your requirements.

Experience

Differential flow metering for over 35 years.

Expertise

Thousands of worldwide installations.

Illustrations are representative of only a few of the possible configurations...

Concentric Orifice Plate

Concentric

Square Edge Concentric Bore & Bevel
Concentric orifice with a square edge. Edge thickness is limited with a downstream beveled bore. Most common and economical type of orifice plate.

Eccentric Orifice Plate

Eccentric

Eccentrically Bored Orifice
Popular in water treatment, oil, and paper industries – anywhere flow contains solids and for slurries. Bore edge is typically inscribed in a circle 98% of line ID.

Quadrant Orifice Plate

Quadrant

Quadrant Bore Orifice
Measure high-viscosity flows – heavy crude, syrups, slurries. Recommended when the Reynolds Number factor is less than 10,000.

Segmental Orifice Plate

Segmental

Radius Bore
For flows with entrained solids or heavy sediments. Bore may be at the bottom or top of pipe depending on type of flow and type of unwanted materials.

Restriction Orifice Plate

Restriction

Restriction Orifice
Designed for pressure restriction, not flow measurement. No bevel and no limit to Beta ratio.

Concentric Orifice Plate

Multi-Bore

Flow Control & Restriction
No bevel and no limit to Beta ratio. Available in multi-bore for higher pressure drops.