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Features• Saves Power Costs
- Eliminates the need for continuousrecirculation to cool the pump.
• Saves System Engineering Time- Includes reverse flow prevention,
low flow detection, recirculation flow control, and recirculation flowpressure reduction.
Flow ControlYarway is either a trademark or registered trademark of Tyco International Services AG or its affiliates in the United States and/or other countries. All other brand names, product names, or trademarks belong to theirrespective holders.
The 5300 Series Automatic Recirculation Control ARC® valve performs four separate functions within the pumping circuit, all within one compact body.
Yarway 5300 Series ARC® ValveFor Centrifugal Pump Protection
During critical low load periods,centrifugal feed pumps need a reliablerecirculation system to prevent pumpinstability and overheating. Becausemany such systems are constructed of a number of components, thesystems can become both complex and costly, requiring substantial outlaysfor design, installation and maintenance.
Yarway’s 5300 ARC® valve, on the otherhand, is a complete system within itself.It actually performs four separatefunctions within the pumping circuit – allwithin one compact body. Essentially,the 5300 ARC® valve is a check valveinstalled in the main line. But it also actsas the sensing and powering elementwhich pilots the operation of arecirculation control valve. The sensingsystem responds to changes in flowrather than pressure.
The control valve incorporates apressure reducing device that dividesrecirculation flow and guides theresulting streams through successive90° turns to dissipate the destructiveenergies of high pressure whilecontrolling fluid velocity.
But perhaps even more importantly, the 5300 ARC® valve recirculates onlythat flow needed to cool a feed pump at critical times of low load rather thanpermitting a continuous recirculationflow. The valve therefore saves theelectrical power that continuousrecirculation would consume, which cancost several thousand dollars per year.
One Valve – Four FunctionsFlow sensing that actuates the pilot or the bypass control valve whichpermits passage of a limited flow ofcooling liquid during low load periods.This flow is delivered to the cascadeelement which dissipates the energy for quiet, safe delivery to the deaerator,condenser or other low pressure sink.Check valve prevents reverse flowthrough the feed pump.
Automatic Recirculation Control Valve
Gate valve(optional)
Four-way airsolenoid valve
Flow meter
FIC
Pump
Pump
Automaticrecirculation
valve
Remote back pressureregulator (optional)
Multiple pressure-reducing orifice
Recirculationcontrol valve
Gate valve(optional)
Checkvalve
Checkvalve
Bypasselement
Storagevessel
Storagevessel
Gate orcontrol valve
Gate orcontrol valve
To process
To process
Sensing orifice
Control Loop System
Yarway System
Yarway 5300 Series ARC® ValveFor Centrifugal Pump Protection
The ARC® valve is installed in the pumpdischarge line in the position of the maincheck valve it replaces. It is adaptableto horizontal or vertical piping and toeither horizontal or vertical upward flow.Flanged or welded ends are optional to suit specifications.
Decreasing flow through the valvecauses the spring loaded disc to movetoward its seat. At a flow rate determinedby the minimum flow requirementthrough the pump, the disc triggers thepilot valve through the lever. This ventsthe pressure on the head of the piston.Pressure acting on the opposite side of the piston opens the bypass valve,permitting flow through the multi-stagecascade element. The flow rate through
the bypass valve is equal to the minimumflow requirement of the pump. Thedirectional changes of the successivehelical flutes, as well as the multipleorifices, provide for the absorption ofpressure energy.
The bypass valve will remain in an openposition as long as the pilot valve is open.This corresponds with the position thedisc assumes at flow rates between anestablished low flow and no flow throughthe main check valve. As the flow rateexceeds the minimum flow rate, therising disc allows the pilot valve toclose; pressure entering the chamberover the piston through the annularclearance around the pilot.
How it Works
Normal Main FlowCheck Valve - OpenPilot Valve - ClosedCascade Valve - Closed
Low Main FlowCheck Valve - at Switch PointPilot Valve - Partially OpenCascade Valve - Opening
Low Main FlowCheck Valve - ClosedPilot Valve - OpenCascade Valve - Open
Main Flow
Main Flow
Main Flow from Pump
CheckValve
FulcrumPilotValve
CascadePiston
Normal Flow Range*
* Normal Flow Range - flow rate betweenmaximum pump delivery and requiredminimum flow rate of pump.
BypassFlow
Main Flow
Main Flow from Pump
CheckValve
FulcrumPilotValve
CascadePiston
BypassFlow
Main Flow
Main Flow from Pump
CheckValve
FulcrumPilotValve
CascadePiston
BypassFlow
Yarway 5300 Series ARC® ValveFor Centrifugal Pump Protection
How to SpecifyCentrifugal pump minimum flowprotection shall be provided by a self-contained multi-function valve which requires no external source of power. The valve shall provide thefunctions of:
1. Spring loaded check valve to preventpump damage from reverse flow.
2. Flow sensor that will activate bypassvalve at the specified minimum flow.
3. Bypass flow control valve, sized to provide the minimum requiredpump flow.
4. Pressure reducing device toeffectively reduce high pumpdischarge pressures to low receivertank/sump pressures.
Actuation of the bypass valve shall be by direct contact of the switchingmechanism to the check valve disc. No levers or linkages shall be utilized.Bypass trim travel shall have a 1:1proportional ratio with the flow sensingdisc travel to provide truly optimummodulated flow control. One pieceoperating element shall be preferred for maximum reliability. The bypass trim shall also be capable of providingextended bypass control service.Service limitations or manual bypasslines for extended bypass service shall not be acceptable.
The ARC® valve shall be designed andconstructed in accordance with ANSIB16.34. Pressure reduction in the
bypass shall be the vendor’sresponsibility to control flashing,cavitation and choked flow conditionsboth within the trim and at the valvedischarge. Sealing surfaces in trim shall be located in an area where it will not be prone to erosion and/orcavitation damage.
Valves shall be flow tested by themanufacturer, and certified performancecurves shall be provided with the valve shipment.
Valve Installation(common line to receiver)
Piping Installation(separate line to receiver)
Receiver vessel
To processTo process
Check valve
Check valve
3R Elbow radiusequal to 3 timesnormal pipe size
3R Elbow radiusequal to 3 timesnormal pipe size
Flow fromfeed pump
Flow from feed pump
Receiver vessel
How it Works
Yarway 5300 Series ARC® ValveFor Centrifugal Pump Protection
Flanged Ends (Data for 11/2", 2" and 21/2" valves available upon request)*Valve Class Figure Dimensions, in. [mm] (D) Bypass Weight RatedSize ANSI No. A B C Flange Size lb. (kg) Main Flowin. [DN] in. [DN] gpm
Butt Welding Ends (Data for 11/2", 2" and 21/2" valves available upon request)*Valve Class Figure Dimensions, in. [mm] (D) Bypass Weight RatedSize ANSI No. A B C Flange Size lb. [kg] Main Flowin. [DN] in. [DN] gpm
Performance – Profiled in Yarway’s Hydraulic Performance Test LabIn our hydraulic performance test laboratory, state-of-the-art data acquisition and computer graphics techniques are called upon for evaluation of the significant performancecharacteristics of Yarway recirculation control valves. The lab’s equipment makes it possible to test a valve over its complete flow range for factors including:
• Total flow through the pump
• Disc position
• Pressure drop across the main check
• Bypass Cv
• Bypass ΔP
• Valve response to sudden changes in flow
• Bypass piston pressure
These detailed analyses are the user’s complete assurance that the valve meetsperformance requirements in all respects and can be supplied with the valve.
A certified test curve is shipped with each valve (see page 10 for example).
Insist on it, as you would for your pump!
Hydraulic Performance Test Lab
Yarway 5300 Series ARC® ValveFor Centrifugal Pump Protection
Our sales representatives will help you select the correct valve for your application.Please complete this form before contacting the sales office to help ensure all necessary information is provided.
How to Order
Comments:
NACE Materials Required?
Flow Test with Performance Certificate Required?
Customer Inspection Required Prior to Shipment?
Certificate of Compliance for Hydro Test Required?
Magnetic Particle Test Required?
Radiograph Inspection Required (specify scope)?
Certified Material Test Report (Pressure Containing Components only)?
Orientation of ARC Valve:
Desired End Connections:
Desired Pressure Class:
Desired Body Material:
Desired Seal Material (except 2" to 8" 9200 and 9300):
Pump Drive Type:
Ethylene Propylene (EPR or EPDM)
150 300 600 900 1500 2500
Vertical Horizontal
Raised Face Flange
Flat Face Flange Ring Type Joint (RTJ)
Butt Weld EndsOther - Specify in “Comments”
A216 Gr. WCB A351 Gr. CF8MA351 Gr. CK3MCuN (6Mo)
TFE Propylene (Aflas or Fluoraz)Fluorocarbon Rubber (Viton®)Other - Specify in “Comments”
Constant Speed - Motor DrivenVariable Speed (VFD) - Motor DrivenVariable Speed - Turbine DrivenOther - Specify in “Comments”
A995 Gr. CD3MWCuN (Super Duplex)
Liquid: Boiler Feed Water (In this case disregard S.G. and V.P.)
Automatic Recirculating Control (ARC®) Valve Data Sheet
Flow tests are generally conducted on all model 5300 and 7100 ARC® valves and one model 9100 or 9200 ARC® valve per sales order line item at no additional cost.Model 9300 ARC® valves and other flow test requirements are upon request and at additional cost. If flange drilling is other than ANSI, please specify in “Comments.”Please include Pump Curve if available.
Yarway 5300 Series ARC® ValveFor Centrifugal Pump Protection
Tyco Flow Control (TFC) provides the information herein in good faith but makes no representation as to its comprehensiveness or accuracy. This data sheet is intended only as a guide to TFC products and services. Individuals using this data sheet must exercise their independent judgment in evaluating product selection and determining product appropriateness for their particular purpose and system requirements. TFC MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE PRODUCT(S) TO WHICH THE INFORMATION REFERS. ACCORDINGLY, TFC WILL NOT BE RESPONSIBLE FOR DAMAGES (OF ANY KIND OR NATURE, INCLUDING INCIDENTAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES) RESULTING FROM THE USE OF OR RELIANCE UPON THIS INFORMATION. Patents and Patents Pending in the U.S.and foreign countries. Tyco reserves the right to change product designs and specifications without notice. All registered trademarks are the property of their respective owners. Printed in the USA.