Pressure Independent Control Valves

Transcription

1 Pressure Independent Control Valves C O N T R O L V A L V E S

2 About the Product Marflow Hydronics supplies a range of Pressure Independent Control Valves or PICVs. 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. Key Features & Benefits We are the only company that has a complete range of PIC valves and sizes. The range consists of three different types that have been designed for various applications in water distribution systems. We understand that various terminal devices require PICVs help eliminate the challenging problems on-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 Reduced design time and risks due to the multifunction capability of the PICV Valve selection is simplified as no authority calculations are required Minimal commissioning time and reduced costs, allowing quicker building completion and handover and easier seasonal commissioning Guaranteed performance of the system and various types of controls and added performance capabilities, such as increased flushing, temperature control and Energy Management, and so we design our valves to meet the real needs of customers. optimisation of energy usage Late changes to building design are easily accommodated by the multi-function capability of the PICV ntrol Valve Regula ti Pressur l a i e nt Co n a lv e V g Diffe re 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. tc 2-Po r on t 3 rol Valve VALVES IN 1 A differential pressure control valve, a regulating valve and a 2-port control valve all come together to create a pressure independent control valve. Fulfilling Solutions Through K nowledge

3 The Marflow Hydronics Range Marflow Hydronics supplies 3 different types of PICVs Axial Rotary Electronic Axial Valve The Axial design valve is selected for a number of reasons, such as: A quick turnaround is required The BMS controller is not capable of Remote Commissioning A more traditional commissioning programme is expected The construction programme is already set Constant flow at the end of the circuit is required The valve has some great features: The rising stem design ensures that valve stroke is maintained even when the valve is pre-set (with no loss of stroke) Flow rates can be adjusted and valves locked in position, even with the actuator in place It s maintenance free and uni-directional; suitable for installation in either the flow or return pipework providing the flow direction arrow is correctly observed The valve body is manufactured in dezincification resistant brass (DZR) and is currently available in 4 sizes: DN15, DN20, DN25 and DN32 It has a large, easy to use, black hand-wheel with integrated setting ring and locking facility, used for valve setting and flow rate adjustment It is actuated by means of an electromotive actuator, a thermoelectric actuator or a TRV sensor Test points are included in the design of the PICV for measurement of differential pressure in order to verify that the valve is operating correctly Rotary Valve The Rotary valve is selected for a number of reasons, such as: The client requires enhanced flexibility for: o Seasonal commissioning o Flexibility on room layouts o Programmable flushing routines Intrinsic equal percentage control is required The BMS controller is Remote Commissioning capable A more engineered solution is required The valve has some great features: The valve design incorporates a characterised ball, with various profiles available to suit the design flow rate, covering standard flow, low flow and very low flow requirements Constant pressure is maintained across the valve by the diaphragm of the differential pressure controller The valve has an ISO mounting pad for quick and easy installation of actuators It is suitable for maximum flow rates between 0.01 and 5 l/s. The valve body is manufactured in dezincification resistant brass (DZR) in sizes DN15, DN20, DN25 and DN32 The valve is also available in sizes DN32, DN40 and DN50 in cast iron DN32 to DN50 valves incorporate flushing mode It is maintenance free and uni-directional, suitable for installation in either the flow or return pipework providing the flow direction arrow is correctly observed

4 Electronic Valve Marflow Hydronics supplies the Dynamx Electronic Balancing Valve. It ensures dynamic pressure independent flow control in HVAC variable volume, cooling and heating systems. The valve has some great features: As the valve monitors and measures precise information 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 Operates on a MODBUS network The valve will control flow to a desired flow set point, irrespective of system pressure conditions, when in either an analogue or digital flow control mode The unit is supplied factory configured to start-up in the commissioning mode (CX-mode), which will allow the system to be flushed without a control signal being applied Operates on AC24 volt 50Hz power supply and power consumption is 3W typical, 9W at start-up Equal percentage or linear configurable valve characteristic The Right Size Whatever size of PICV is needed, we can help. We now supply valves sized from DN65 to DN150 in addition to our existing range. Marflow Hydronics supplies a complete range of PICVs from ½ to 2 screwed and 65mm to 150mm flanged. Understanding that every project is different and that every customer has unique requirements, we ve expanded our range accordingly. We ve also considered the longevity of our products and have ensured that the valves don t just make installation easier, but also maintenance. The 1 to 2 valves have union connections that make removing the valves far easier. Also, the 2 valve is equivalent to 65mm, offering 5.0 l/s. Fulfilling Solutions Through Knowledge

5 Welcome to Marflow Hydronics As 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. With combined expertise across a broad range of areas, our knowledgeable and highly skilled team works closely with customers. We are dedicated to supporting them at all stages of their project, 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 won t stop until a successful handover of the project takes place and the customer is completely satisfaction. With solutions ranging from valve distribution to the design and supply of complex bespoke manifolds, we have the products, knowledge and passion to meet our customers requirements. We believe in optimising a building s efficiency whilst reducing commissioning time and annual running costs; 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 are always looking for the best products and the next innovation so that we can offer our customers the most effective solution for their needs, yet at the same time we develop products that work in the real world and will react to real life situations. Our extensive portfolio of products consists of the Xterminator range of valve sets for fan coils, chilled beams and other hydronic terminal units, Axial and Rotary Pressure Independent Control Valves (PICV), Electronic Balancing solutions, Filterball Valves, Terminator Valves, Ball Valves and Manifold Systems. This is in addition to Energy Management solutions and the ground breaking Remote 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 always here to help, so if there is any way we can support you, whether it s for quotations, technical data or simply friendly advice, then please don t hesitate to contact us. Contact us on or hydronics@marflow.co.uk

6 C O N T R O L V A L V E S Marflow Hydronics Ltd Austin Way Hamstead Industrial Estate Birmingham B42 1DU hydronics@marflow.co.uk FS Marflow Hydronics Ltd All 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. MHS_PICV_v2_2014