Description

Associated products:

-

MS10 isolating ball valve.

-

DCV3 check valve.

-

Ball valve actuator (BVA).

-

M21 two-port ball valve.

-

MV solenoid valve for BVA.

-

Three-port QL valve.

Requirements

M10S

100 mm (Sump)

M10S

M10S

2-port

ball valve

TF56

sensor

Drain

PN

air

3.0 ppm

alarm relay

Condensate

flow

Boiler house

TDS blowdown controls

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

© Copyright 2015

Model 556/TF56-N

Turbidity Monitoring System

The Turbidity Monitoring System consists of a TF56-N Turbidimeter and a 556 Converter designed to continuously monitor for oil and

grease contamination in make-up water and condensate circulated back to the boiler feedwater system. It can also be used to monitor the

supply from mains raw water, demineralisation and reverse osmosis water treatment plants.

The turbidimeter is a precise, dual channel, scattered light turbidity monitor that uses light in the visible range (VIS) and Near Infrared

Range (NIR) from 400 to 1100 nm. A precisely defined constant light beam penetrates the fluid medium and the light scattered from any

particles (trace suspended solids, undissolved liquids or gas bubbles) in the medium is detected by four hermetically sealed silicon

photodiodes at an angle of 11°. Simultaneously the unscattered light is detected by a reference photodiode. This unique dual channel

design compensates for colour and disturbances in the medium. The sensor can measure very low particle sizes and concentrations.

The converter has four fixed and one variable measuring range calibrated in ppm, providing continuous, real-time monitoring of a fluid

medium’s turbidity. A 3-digit LED indicator displays turbidity as a percentage of the selected measuring range. Two independent set points

and a 0-20 mA or 4-20 mA output are provided by the converter for alarms and real-time remote display of turbidity monitoring. An additional

failsafe relay output is built in for remote sensing of converter lamp or power failure.

2.4.32

Principle features:

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Real-time process monitoring.

-

2 independent alarm set points.

-

Failsafe relay.

-

3-digit LED display.

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0-20or4-20mAoutput.

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Dual channel compensation design.

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Low maintenance.

(min)

-

CIP / SIP compatible.

Fill

-

Compact dimensions.

-

Reliable, cost effective measurement.

MV11

ball valve

MV11

DCV3

2-port

M10S

500 mm

M10S

Bypass

Divert

556

converter

Recommended installation for the 556 / TF56-N turbidity monitoring system

Many countries ensure the protection and safe operation of boiler equipment, buildings and personnel through Legislation and Standards.

For example shell boilers operated in the European Community must comply with requirements of the harmonised standard EN 12953

that specifies maximum contamination levels for boilers operated unsupervised for periods of 24 or 72 hours.

Function

To protect the boiler feedwater system from oil and grease contamination, the Turbidity Monitoring System has two independent alarm

set points:

- Alarm 1

can be set to divert and discharge contaminated water above 3.0 ppm to a blowdown vessel or directly to drain.

- Alarm 2

can be set to shut down the boiler if contamination level rises above 5.0 ppm.

Diversion of contaminated supplies may be achieved with two 2-port ball valves with a

1⁄4 turn actuator or a 3-port actuated valve.

Spare parts

For available spares and options please contact your local Spirax Sarco representative.

TI-P403-96

AB Issue 3

5.0 ppm divert relay

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