INDUSTRIAL FLOW METER

ISB/2

EMCO Orifice Plate Series ISB/2 with Integrated Unit for RTJ Flanges
The EMCO Orifice Plate is used as a primary element in flow measurement of liquid, gas and steam applications based on the differential pressure principle. According to this working principle, the orifice plate creates a flow restriction in the pipeline to allow measurement of the resulting pressure drop and flow rate. Our orifice plates have been tested and tried for over 50 years and measure up to the highest industry and compliance standards.

The Orifice Plate Series ISB/2 is constructed with a an integrated unit for mounting between ring type joint (RTJ) flanges.

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หมวดหมู่: Differential Pressure, Flow Meter, Orifice Plate

แบรนด์: EMCO

Overview

Design

Installation

Before installation, the orifice plate must be kept clean and protected against corrosion and physical damage. It is also important that you pay careful attention to to the sharp edge of the plate. Once ensured that it is clean, install the orifice plate carefully such that the orifice bore aligns with the centre of the pipeline. Tap location varies depending on whether it is used for liquid, gas or steam. It is not supplied with any safety devices and must not be used for higher pressure, than stated on the name plate. The pipe system must therefore be equipped with a safety device. However, this type of primary element requires no special maintenance.

Features

Predictable pressure loss
Simple construction
Proven design
Cost-effective

Specifications

Construction



Design and calculation standards	ISO 5167, ASME MFC-3M, ISA RP 3.2, Shell Flow Meter Engineering Handbook, L. K. Spink, AGA no. 3
Sizes	2″ – 20″ according to ANSI B 16.36, 50 mm < D < 1000 mm according to ISO 5167 and 50 mm < D < 900 mm according to ASME MFC-3M.
Pressure rating	600 – 2500 lbs RTJ
Plate thickness	3 – 9 mm
Holder width	27 mm; * 28.5, 30 mm, * 32 mm
β (d/D)	Preferred range 0,5 < β < 0,7 for highest accuracy.
Vent or drain hole	On request
Material	AISI 316, other on request
Bore	d > 12,5 mm
Mounting style	Between RTJ flanges according to ANSI B16.36, API, other standards on request.
Connection	Oval type or octagonal type
Orifice plate shapes	Square edge concentric, conical, 1/4 circle, segment
Handle	With name plate in AISI 316 with the following inscription : TAG no., serial no., pressure rating, inner pipe dia., bore, material.

Technical Data



Accuracy	+/- 0,6 % for β < 0,6 and equal to β for β values above 0,6
Pressure loss	Depending on β, for β equal to 0,6 : ca. 60 % of the differential pressure measured
Limits for Reynolds No	Re > 1260 x β2 D according to ISO 5167 2000 < Re < 108 according to ASME MFC-3M

Sizing

Size	600 lbs	900 lbs	1500 lbs	2500 lbs
1″	R16		R16	R18
1½”	R20		R20	R23
2″	R23		R24	R26
2½”	R26		R27	R28**
3″	R31	R31	R35	R32**
4″	R37	R37	R39
6″	R45	R45	R46*
8″	R49	R49
10″	R53	R53
12″	R57	R57
14″	R61
16″	R65***
18″	R69***
20″	R73***