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Pressure &


Flowstream Restriction Orifice Plates

For Topside Flow Measurement

Restriction Orifice Plates are widely used for many applications within the industry. Although the design is very similar to an orifice plate, the function is different. Restriction plates are used to suit a number of different purposes including:
• Reduction of in line pressure
• Control flow rates by restricting flow, regardless of downstream conditions

Design Considerations
• Prevent critical flow
• Removal of cavitation
• Reduce noise levels

Solartron ISA provides complete Engineering support from initial restriction design and sizing concepts to manufactured final products. We offer a number of different restriction designs to suit the needs of your application including:
• Restriction Plates (Standard applications)
• Multi-Hole Restriction Plates (Used to reduce noise)
• Multi-Stage Restriction Units (Flanged / Butt-Weld): 
     Gas Applications – To prevent critical flow 
     Liquid Applications – To reduce cavitation

• Proven design technology
• Products designed in accordance with R.W.Miller - Flow Engineering Handbook
• Plate thickness calculations designed in accordance with ASME B31.3
• Designs available to accommodate site restrictions and noise limitations
• Prevent critical flow or cavitation issues

Phone: +44 (0) 1388 773065 ~ email:
 Hackworth Industrial Park, Shildon, County Durham, DL4 1LH UK
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