Mac-Weld multi-stage restriction orifice is the perfect solution when the required pressure drop is not possible with a single plate.

Made up of multiple orifice plates, each reducing pressure with calculated reduction steps to achieve the required drop in the pressure. A restriction orifice run can also greatly reduce noise and vibrations, as well as flashing or cavitation in the line. Our multi-stage restriction orifice assembly can reduce pressure for a simple, maintenance free and economical solution.

• Reduce the pressure drop, not achievable with a single plate.
• Prevents flashing, cavitation and other critical flow problems.
• Single hole multistage design along with multi-hole, multi-stage designs available.
• Line sizes: 1/2” – 24”. Flange Rating: 150# – 2500#
• Built to optimize the pressure drop across each stage
• Suitable for both high flow/pressure liquids and gases
• Bore sizing based on ASME.MFC.3M, ISO 5167 or AGA-3
• Low maintenance costs

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Mac-Weld multi-stage restriction orifice assembly. Multiple internal plates with concentric edge bores, reducing a total of 80% pipe diameter