![MDP-G1-Main[1]](https://www.emcocontrols.com/wp-content/uploads/2022/05/MDP-G1-Main1.png)
Description
The gas passes each stage at sonic or critical velocity. When the pressure is reduced so is the density of the gas or steam. In order to maintain a constant velocity the cross sectional area is increased after each stage. The calculation is based on R.W. Miller and Ward-smith. Each of the pressure reducing stages are connected and supplied as a unit
EMCO single hole multi stage depressurizing units (SDP-G) are used to reduce the pressure in a number of stages to a desired pressure. EMCO multi hole multi stage depressurizing units (MDP-G) are used to reduce the pressure in a number of stages to a desired pressure and to secure as low noise development as possible
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Design and calculation standards
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R.W. Miller: Flow Measurement Engineering Handbook, Ward-Smith ISO 5167 etc.
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Sizes
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1/2" - 24"
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Pressure rating
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150 - 2500 lbs,
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Orifice plate shape
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Square edge concentric
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Plate thickness
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Thickness is calculated to handle the differential pressure
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Distance between each stage
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1 - 2 times inner pipe diameter
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Material, plates
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AISI 316 (standard), and other erosion resistance materials on request
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Material, spool piece
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P235GH (A106 Gr. B or C), AISI 316, AISI 321, Duplex Hastelloy, other materials on request.
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Mounting style
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Between flanges according to ANSI B16.5 or DIN Standards or butt weld ends.
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Overall length
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Depends on number of stages and pipe size. Each multi stage is calculated individually
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Documentation
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Material certificate acc. to EN 10204-3.1. Noise calculation
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