• Wide range of materials
  
• Proven technology
  
• Suitable for most pipe sizes
  
• Orifice sizing on request

General Description
Restriction orifice plates can be used as a simple pressure reducing device, or to limit the flow rate in a pipeline.
They are designed to slip between pipe flanges. Versions to suit RTJ type flanges are available

Dimensions
The outside diameter of the orifice plate is equal to the bolt circle diameter of the connecting flanges minus the diameter of the bolt. This ensures that the plate is centred accurately in the line.

Plate thicknesses depend on line size and differential pressure, and should be sufficient to prevent the plate from bending under operating conditions.

Orifice plates can be made in accordance with customer drawings as required.

Materials
Standard material grades include 316 Stainless Steel, 304 Stainless Steel, 310 Stainless Steel, Hastelloy® C276, Hastelloy® B3, Duplex Stainless Steel, Super Duplex Stainless Steel, Monel® 400, Carbon Steel, Titanium, Incoloy® 800, Incoloy® 825, Inconel® 600, Inconel® 625, Tantalum, PTFE and PVDF.
Please contact the sales office for other grades.

Orifice Bore Sizing
Orifice calculations are performed generally in accordance with the formulae detailed in RW Miller’s Flow Measurement Handbook , when requested.

British Rototherm Company Limited,
Kenfig Industrial Estate, Margam,
Port Talbot   SA13 2PW
United Kingdom

Telephone: +44 (0) 1656 740 551
Facsimile: +44 (0) 1656 745 915
E-mail: rototherm@rototherm.co.uk

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British Rototherm Company Limited is Registered in Wales: 2570730