Pressure Independent Control Valves

About the ProductMarflow Hydronics supplies a range of Pressure Independent Characterised Control Valves or PICCVs. They combine the functions of 3 different products - a differential pressure control valve, a regulating valve and a 2-port control valve - into a single multi-functional unit. Use of these valves in a commercial heating or cooling system allows comfort levels to be optimised at least cost, reducing ongoing energy consumption and improving the efficiency of the system to outstanding levels.

We are the only company that has a complete range of PICC valves and sizes. The range consists of three different types of PICCV that have been designed for various applications in water distribution systems. We understand that various terminal devices require various types of controls and added performance capabilities, such as increased flushing, temperature control and Energy Management, and so design our valves to meet the real needs of customers.

We have also pioneered new methods of commissioning to use with the valves to help speed up the process, making it easier than ever before.

Key Features & Benefits

• PICVshelpeliminatethechallengingproblemson-site associated with sizing 2-port control valves. They have close to 100% control valve authority, lowering pump head (compared with traditionally designed systems) and reducing energy consumption

• Reduceddesigntimeandrisksduetothemultifunction capability of the PICV

• Valveselectionissimplifiedasnoauthoritycalculations are required

• Minimalcommissioningtimeandreducedcosts,allowing quicker building completion and handover and easier seasonal commissioning

• Guaranteedperformanceofthesystemandoptimisation of energy usage

• Latechangestobuildingdesignareeasilyaccommodated by the multi-function capability of the PICV

Fulf illing Solutions Through K nowledge www.marflowhydronics.co.uk

A differential pressure control valve, a regulating valve and a 2-port control valve all come together to create a pressure independent control valve.

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2-Port Control Valve

3 VALVES IN 1

Axial ValveThe Axial design valve, known as EVOPICV, is selected for a number of reasons, such as:• Aquickturnaroundisrequired• TheBMScontrollerisnotcapableofRemote®

Commissioning• Amoretraditionalcommissioningprogrammeis

expected• Theconstructionprogrammeisalreadyset• Constantflowattheendofthecircuitisrequired

The valve has some great features:

• Therisingstemdesignensuresthatvalvestrokeismaintained even when the valve is pre-set (with no loss of stroke)

• Flowratescanbeadjustedandvalveslockedinposition, even with the actuator in place

• It’smaintenancefreeanduni-directional;suitablefor installation in either the flow or return pipework providing the flow direction arrow is correctly observed

• Thevalvebodyismanufacturedindezincificationresistantbrass(DZR)andiscurrentlyavailablein4sizes: DN15, DN20, DN25 and DN32

• Ithasalarge,easytouse,blackhand-wheelwithintegrated setting ring and locking facility, used for valvesettingandflowrateadjustment

• Itisactuatedbymeansofanelectromotiveactuator,athermoelectricactuatororaTRVsensor

• TestpointsareincludedinthedesignoftheEVOPICV for measurement of differential pressure in order to verify that the valve is operating correctly

Rotary ValveTheRotaryvalve,knownasEVOPICVR,isselectedforanumber of reasons, such as:• Theclientrequiresenhancedflexibilityfor:

o Seasonalcommissioningo Flexibility on room layoutso Programmable flushing routines

• Intrinsicequalpercentagecontrolisrequired• TheBMScontrollerisRemote® Commissioning capable• Amoreengineeredsolutionisrequired

The valve has some great features:

• Thevalvedesignincorporatesacharacterisedball,with various profiles available to suit the design flow rate, covering standard flow, low flow and very low flow requirements

• Constantpressureismaintainedacrossthevalveby the diaphragm of the differential pressure controller

• ThevalvehasanISOmountingpadforquickandeasy installation of actuators

• Itissuitableformaximumflowratesbetween4.7l/sand0.61l/s

• Thevalvebodyismanufacturedindezincificationresistantbrass(DZR)insizesDN15,DN20,DN25and DN32

• ThevalveisalsoavailableinsizesDN40andDN50in cast iron

• Itismaintenancefreeanduni-directional,suitablefor installation in either the flow or return pipework providing the flow direction arrow is correctly observed

www.marflowhydronics.co.uk

The Marflow Hydronics Range Marflow Hydronics supplies 3 different types of PICCVs Axial • Rotary • Electronic

Fulf illing Solutions Through K nowledge

The Marflow Hydronics Range Marflow Hydronics supplies 3 different types of PICCVs Axial • Rotary • Electronic

Electronic ValveMarflow Hydronics supplies the Dynamx Electronic PICCV. It ensures dynamic pressure independent flow control in HVAC variable volume, cooling and heating systems.

The valve has some great features:

• Asthevalvemonitorsandmeasurespreciseinformation on energy flows at all levels within the system, then the primary pumps can be controlled to ensure that only the correct volume of water is delivered and distributed to each floor when required

• OperatesonaMODBUSnetwork• Thevalvewillcontrolflowtoadesiredflowset

point, irrespective of system pressure conditions, when in either an analogue or digital flow control mode

• Theunitissuppliedfactoryconfiguredtostart-upin the commissioning mode (CX-mode), which will allow the system to be flushed without a control signal being applied

• OperatesonAC24volt50Hzpowersupplyandpower consumption is 3W typical, 9W at start-up

• Equalpercentageorlinearconfigurablevalvecharacteristic

Supporting YouShouldyourequirefurtherassistanceourserviceand support team are here to help. Our service and support team consists of highly skilled technical sales engineers who have a wealth of experience in design, installation and commissioning. From challenging water distribution problems to advice about various pipe layouts and configurations, our team has the experience to assist in making informed decisions for clients on the best solutions available.

Our support means you…• Are able to use your time more efficiently

• Receive effective products and solutions

• Work with a knowledgeable team

• Are given detailed planning and service from the very beginning

• Achieve greater cost control

• Can gain a deeper understanding of the products through the training and supporting materials we offer

• Save time with our sizing software that selects valves

For more information on our products and how Marflow Hydronics can help you, please visit our website – www.marflowhydronics.co.uk.

Fulf illing Solutions Through K nowledge www.marflowhydronics.co.uk

Contact us on 0845 564 1555 or email hydronics@marflow.co.uk

Welcome to Marflow HydronicsAs specialist solution providers for the balancing, controlling and metering of water distribution systems in the HVAC industry, Marflow Hydronics is dedicated to creating and supplying innovative and efficient products that meet the rapidly changing needs of buildings and users alike.

Our knowledgeable and highly skilled team of engineers works closely with our clients, supportingthematallstagesoftheirproject,from the initial design concept to installation and commissioning, ensuring that all their needs are met. We bring together attention to detail and a clear focus on efficiency to make sure that the correct product is specified at all times.

Every stage of the process is built on the key foundations of service and support, and we are dedicated to ensuring complete satisfaction untilasuccessfulhandoveroftheprojecttakesplace.

With solutions ranging from valve distribution to the design and supply of complex bespoke manifolds, we have the products, knowledge andpassiontomeetourcustomers’requirements. We believe in optimising

abuilding’sefficiencywhilstreducingcommissioningtimeandannualrunningcosts;and all our products are created to reflect this belief.

At Marflow Hydronics we bring together bright ideas, innovative concepts and intelligent valves to achieve first class solutions that provide customers with product excellence, and a future proofed, fully supported system.

We supply an extensive portfolio of products, including the Xterminator® range of valve assemblies for fan coils, chilled beams and other hydronic terminal units, Axial and RotaryPressureIndependentControlValves(PICV), Filterball® Valves, Terminator® Valves, BallValvesandManifoldSystems.ThisisinadditiontothegroundbreakingRemote® Commissioning concept - a system solution that offers all that is required to balance and control water flow to hydronic terminal units in a truly flexible and energy efficient way.

We are here to assist you, so if there is any way wecansupportyourprojects,withquotations,technical data or simply friendly advice, then pleasedon’thesitatetocontactus.

Marflow Hydronics LtdBritannia HouseAustin WayHamstead Industrial EstateBirminghamB42 1DU

0845 564 1555hydronics@marflow.co.ukwww.marflowhydronics.co.uk

© 2013 Marflow Hydronics LtdAll rights reserved. No part of this publication may be reproduced, photocopied, stored on a retrieval system or transmitted without the express written permission of Marflow Hydronics Ltd. Marflow®, Remote®, Xterminator®, Filterball®, Filtermate® and Terminator® are registered trademarks of the Marflow Group. Marflow Hydronics Ltd reserves the right to introduce changes without prior notice. M

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Contact us on 0845 564 1555 or email hydronics@marflow.co.uk

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