Pump Protection Presentation

8/10/2019 Pump Protection Presentation

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Introduction

What is an ARV Its main function

What is Cavitation

Steps & Effects of Cavitation

Minimum Flow Methods

Principle of Operation ARV Features

Application

Installation

Advantages

Material

Business Benefits

Manufacturers

Blackhall Series

Video Animation


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What is an Automatic Recirculation Valve?

Main function

To prevent pump instability, overheating and to prevent Cavitation


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Liquid Vapour Liquid

What is Cavitation?

Cavitation is defined as the process

of formation and disappearance of the

vapour phase of a liquid when it issubjected to reduced and

subsequently increased pressures.

What Does This Mean:

It is the phase transition between liquid

And vapour conditions.


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Steps and Effect

Loose particles created

Knocking sounds

Vibration

Erratic power consumption

Fluctuation or reduction in

pump performance


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Steps in Cavitation

Formation of bubbles inside the liquid

Growth of bubbles

Collapse of bubbles

Cavitat ion


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Minimum Flow Protection Methods

What is it ?

Minimum continuous flow is thelowest flow rate at which a

centrifugal pump may be operated

on a continuous basis without

exceeding the design constraints of

the manufacturer or the equipment

specifier.

Why is it important?

Minimum flow protection isvital upon pump start up and low

demand conditions and for

continuous running of pump.


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Continuous Recirculation System

This is achieved by using a fixedorifice as the pump by-pass.

Recirculation is operating

continuously without any regard

for flow through the pump.

It does protect the pump from

low flow but it is wasteful of energy


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Instrument Controlled System

Relies on other valve accessories

to function well in order for it to

be efficient. Its expensive and has

too many components.

Flow meter Valve solenoid


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Automatic Recirculation System

The valve is flow operated and does

not require any external power

source to operate.

On/Off recirculationSEMI-Modulating recirculation

Fully Modulating recirculation


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Principle Of Operation

3 Phase Sequence

Valve Fully Open - By - Pass Shut

By - Pass Tending to Open - Valve Tending to Close

Valve Shut - By - Pass Fully Open


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.

Stopper

Pressure Reduction Nozzles

Bypass Housing

Non Return Valve in by-passFlow Sensing by nature

Of valve stopper

Geometry and stopper,

Spring assembly.


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Application Centrifugal Pumps

Boiler feed or Cooling water plants

Power stations

Paper and Pulp

Marine and off shore

Refining and Chemical industries.

Pump Discharge Line

Adaptable to horizontal and vertical piping.

Adaptable by design to ensure maximum

Fluid flow velocity.

Flanged Ends.

Typical Installation


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Advantages of A.R.V

No external power source or equipment is required

Energy conservation

Compact, self-contained, tamper and shock proof

Low main flow head loss

Easy installation

Unique design to suite different applications

Combines both check and bypass features

Minimum flow protection continuous


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Material

Carbon Steel

Stainless Steel (Various grades)

Nickel based alloys

Titanium

Exotic alloys

B i B fit M f t


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Business Benefits

Saves Power Costs

Protects the business investment

Eliminates Cavitations

Saves Installation and Maintance

costs

Reduces Downtimes

Manufactures

Blackhall Engineering

Schroedahl-Arapp, Germany

Schroeder Valves, Germany

HBE Engineering, USA

Yarway (Tyco) USA, Europe

S i 6500


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Series 6500

S i 6600


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Series 6600

S i 6700


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Series 6700

Pump Protection Presentation

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