yawmc 0414 us yarway arcv

Yarway 9100 Series ARC® ValveFor Centrifugal Pump Protection

Copyright © 2005 Tyco Flow Control. All rights reserved. YAWMC-0414-US-0501Total Flow Control Solutions™

Flow Control

General DescriptionThe 9100 Series ARC provides reliable,economical protection for centrifugalpumps against the serious damage fromoverheating and instability that can resultfrom even a few minutes of low flow. Byproviding recirculation flow to the inlet ofthe pump, the 9100 ARC assures aminimum flow for stable pump operation.

The modulating 9100 ARC createsoperating economies in several ways. TheARC recirculates only the flow required toassure a minimum flow through the pumpat all times. Under full process main flowdemand, recirculation flow is not required.But as the process main flow demanddecreases, recirculation becomesnecessary. Unlike continuous recirculation,the ARC responds directly to this need.The use of an ARC valve eliminates theneed to oversize the pump and primemover. Such oversizing adds significantlyto the capital cost of the pump and primemover as well as to the cost of energyneeded for operation.

An ARC valve also saves most of the costsof a conventional multiple component flowcontrol loop because the valve itself is acompletely self-contained system: it is aflow sensing orifice; a check valve; arecirculation control valve and a pressureletdown device. As a self-containedsystem, it requires no instrument signal orpower source, or any of the associatedmaintenance.

Manufactured and tested in the U.S.A., the 9100 ARC is one of an entire family of ARC (automatic recirculation control)valves. These valves have deliveredconsistent and reliable service for overthree decades. In the U.S.A. alone, morethan 15,000 ARC valves have beeninstalled in power plants, refineries, andchemical plants.

Yarway and ARC are either registered trademarks or trademarksof Tyco International Services AG or its affiliates in the UnitedStates and/or other countries. All other brand names, productnames, or trademarks belong to their respective holders.

A self-contained system, the 9100 Series ARC® valverequires no instrument signal or power source.


Copyright © 2005 Tyco Flow Control. All rights reserved. YAWMC-04142

FeatureSelf-contained valve functions as integralcheck valve, flow sensing element, bypasscontrol valve, bypass actuator andmultistage pressure letdown valve.

Benefits• Eliminates high cost of installation and

maintenance of complex conventionalflow control loops.

• Eliminates multiple vendors ofcomponents.

• Eliminates cavitation in the valving andpiping.

• Only three pipe connections.

• Eliminates any power source orinstrument signal.

FeatureIntrinsically safe design with all static seals,packless design (no stuffing boxes), noleak path to atmosphere, and no electricalwiring.

BenefitThe valve is ideal for broad pumpingapplications in the hydrocarbon industry.

FeatureTotally mechanical self-powered designwith no linkages, control signals, pilotvalves, etc. that require maintenance.

BenefitMaintenance and operating costs aredramatically reduced.

FeatureCertified Test Curve supplied with eachvalve lot.

BenefitAssures reliable performance from everyvalve.

Features and Benefits

Second Stage Pressure Letdown(optional - not shown)back pressure regulator provides multistagepressure drop capability.

Built-in CheckValvespring-loadedagainst seat, theflow-sensing discacts as a main flowcheck valve.

Stable Designvibration guide structuresat top and bottom of flow-sensing disc provide fullsupport to assembly.Top guide includes a snubber to minimize vibration.

Precise RecirculationControlcharacterized orifices in the bypass elementprovide accurate,modulatedrecirculation flow.

CheckvalveTo process

Flow meter

Sensing orificePump

Four-way airsolenoid valve

Gate valve(optional)

Multiple pressure-reducing orifice

Recirculationcontrol valve

Gate orcontrol valve

Checkvalve

To process


Storagevessel

Control Loop System

FIC

Gate orcontrol valve

Remoteback

pressureregulator(optional)


Bypasselement

Automaticrecirculation

valve

StorageVessel

Pump

Yarway System



How it works: ARC Operation and Pump/system Curve

Bonnet

Lock nut

Upper guidebushing

Nut

Bypass bushing

O-ring

O-ring

Body

Spring

Stud

O-ring

Lock nut

Snubber-sealassembly

Disc assembly

Lock washer

Valve Installation(common line to receiver)

Piping Installation(separate line to receiver)Receiver vessel Receiver vessel

Checkvalve

Checkvalve

Blockvalve

Block valve(locked open)

Flow fromfeed pump

3R elbowRadius equal to 3 times

nominal pipe size

3R elbowRadius equal to 3 times

nominal pipe size

Flow fromfeed pump

To process

To process

Size line for maximum velocity of 15 ft. sec.

Recommended locationof back pressure device

when specified



Flow Flow Flow

Hea

d

Min

.

Min

.

Min

.

Hea

d

Hea

d

Figure 1No process flowFull recirculation

Figure 3Increased process flow

No recirculation

Figure 2Changing process flowControlled recirculation

The heart of the recirculation valve is amain flow sensing check valve disc, whichis flow sensitive, not pressure sensitive.The disc modulates to the demand forprocess flow at the same time assuring aminimum flow through the pump. Thismodulating characteristic results in aconsistent, stable, and repeatableperformance over full pressure range.

The disc is shown in the closed position inFigure 1. In this position there is noprocess flow and the bypass is full open.This protects the pump against planned oraccidental “dead heading” which can result

from a closed down stream pump isolationvalve or process control valve.

As the disc lifts (Figure 2) in response toan increase in flow to the process, thebypass element which is integral to thedisc, closes the bypass flow orificesreducing recirculation flow. Recirculationflow is controlled with disc position. Thismodulation feature assures that the total ofprocess flow and recirculation flow exceedthe minimum flow through the pump asspecified by the pump manufacturer.

When the disc is set at full lift position, asin Figure 3, the bypass is closed. As

process flow decreases, the reverse actionoccurs and the recirculation flow againincreases. Flow enters the bypass elementat the bottom of the disc assembly and iscontrolled by characterized orifices insidethe disc stem. Flow continues through anannulus in the bypass bushing and isdirected to the outlet of the valve.

The valve provides for single phase flow inthe bypass eliminating the possibility offlashing or cavitation. This is accomplishedby the valve design, and if necessary,external back pressure regulator.

Operation

300

200

100

0

1600

1500

1400

1300

1200

1100

1000

900

800

700

600

500

400

600

500

400

300

200

100

200 400 600 800

Rec

ircul

atio

n Vo

lum

e, g

pm

Assume SP GR = 0.90El

ectri

c R

ate

12 ¢/

kwh

14 ¢

10 ¢

400,000

160,000

120,000

80,000

48,00040,000

Requirements for Pump Circulation (hp)

Figure 4

Power Required for Recirculation (hp)

Figure 5

Discharge head (psi)

Dis

char

ge H

ead,

(ft.

of W

ater

)

Pum

p O

pera

ting

Cos

t (87

60 h

/yr.)

$/y

r.

0 65 100 200 300 400 0 65 100 200 300 400



The cost of the electricity consumed in continuous recirculation cooling is significantly higher than many people realize. For example, themanufacturer of a 1200 gpm pump with a discharge head of 500 feet, may require 400 gpm recirculated flow to keep it cool (Figure 4).Continuously pumping 400 gpm against a 500-foot head requires 65 horsepower. In a 10¢/kwh power cost area, total annual cost savingsusing an ARC valve would be $48,000 (Figure 5).



Dimensions and WeightsValve Class Dimensions, in. [mm] BypassSize ANSI A B C Flange Size Weight, lb (kg)

in. [DN] ± 1/16 [1.6] ± 1/16 [1.6] ± 1/16 [1.6] in. [DN]

150 41/2 [115] 4 [102] 101/2 [267] 27 (12.2)1 [25] 300 41/2 [115] 4 [102] 101/2 [267] 3/4 [19] 32 (14.5)

600 43/4 [120] 41/4 [108] 11 [280] 34 (15.4)150 41/2 [115] 4 [102] 101/2 [267] 30 (13.6)

11/2 [40] 300 41/2 [115] 4 [102] 101/2 [267] 3/4 [19] 39 (17.7)600 43/4 [120] 41/4 [108] 11 [280] 40 (18.1)150 515/16 [151] 4 [102] 111/2 [292] 45 (20)

2 [50] 300 63/16 [157] 41/4 [108] 12 [305] 11/2 [40] 53 (24)600 61/2 [165] 45/8 [117] 123/4 [324] 55 (25)150 71/8 [181] 5 [127] 151/4 [387] 97 (44)

3 [80] 300 73/8 [187] 53/8 [137] 16 [406] 2 [50] 107 (49)600 73/4 [197] 53/4 [146] 163/4 [425] 110 (50)150 9 [229] 515/16 [150] 187/8 [479] 205 (93)

4 [100] 300 93/8 [238] 61/4 [159] 191/2 [495] 3 [80] 230 (104)600 93/4 [248] 63/4 [171] 201/2 [521] 250 (113)150 1111/16 [297] 67/8 [175] 213/4 [552] 310 (141)

6 [150] 300 12 [305] 75/16 [186] 225/8 [575] 4 [100] 340 (154)600 121/2 [318] 8 [203] 24 [610] 450 (204)150 1711/16 [449] 111/2 [292] 341/2 [786] 580 (263)

8 [200] 300 181/8 [460] 12 [305] 351/2 [902] 6 [150] 660 (299)600 1813/16 [478] 1213/16 [325] 371/8 [943] 770 (349)

10 [250] 600 Consult Factory12 [305] 600 Consult Factory

Parts List Material

1 Body ASTM A-216 GR. WCB2 Bonnet ASTM A-216 GR. WCB3* Disc SS

Snubber-seal Teflon® and4*

Assembly TFE Propylene5** Bypass Bushing SS6** O-ring Fluoraz7** O-ring Fluoraz8** Spiral Ring SS9** Bypass Tube SS10 Spring Retainer SS13 Spring Inconel®

14 O-ring Fluoraz15 Stud ASTM A-193 GR. B716 Nut ASTM A-194 GR. 2H18 Nameplate SS

Items 3 through 14 recommended valve spare parts

* Disc furnished with item 4 installed.

** Bypass bushing furnished with items 6, 7, 8, and 9.

9100 Series ARC, 1” and 11/2”

Note1. Class 150 and 300 9100 ARC valve only offered for exact serial number replacement valves.

Note1. Inconel® is a registered trademark of Special

Metals Corporation.

2

4

18

3

5

6

7

8

10

1

15

16

14

9

13

C

B

A



Materials of construction options1.Stainless Steel

2.6 Mo Stainless Steel

3.Duplex Stainless Steel

4.NACE Valve conforming to MR01752002 edition

5.DIN, BS, JIS, and RTJ flanges

6.External Back Pressure Regulator (if required)

Recommended spare parts* Disc Assembly furnished with item 4.

** Bypass Bushing furnished with items 6, 7, 8, and 9.

*** Upper guide bushing furnished withitems 11 and 12.

9100 Series ARC, 2” thru 12”

2

11

1012

4

18

35

6

78

9

1

15

16

14

13

20

C

B

A

Parts ListItem Part Material

1 Body ASTM A-216 GR. WCB2 Bonnet ASTM A-216 GR. WCB

3*Disc Assembly (Bypass Element)

SS

4* Snubber-seal Assembly Teflon® and TFE Propylene5** Bypass Bushing SS6** O-ring TFE Propylene7** O-ring TFE Propylene8** Lock Washer SS9** Lock Nut SS

10*** Upper Guide Bushing SS11*** Lock Nut SS12*** Snubber Orifice SS13 Spring SS14 O-ring TFE Propylene15 Stud ASTM A-193 GR. B716 Nut ASTM A-194 GR. 2H18 Nameplate SS20 Flow Conditioner SS

Note

1. Teflon® is a registered trademark of E.I. du Pont de Nemours Company.

In high pressure pumping applications thesystem often does not provide adequatepressure in the bypass line to preventcavitation or flashing. Either of theseconditions is undesirable in that it cancause damage to both valves and the pipesystem or cause a reduction in flow beyondthe minimum desired, jeopardizing thepump protection system. All PRV’s willexperience a velocity induced recoveryeffect which will limit the amount ofpressure drop a valve can take and causea reduction in flow capacity.

The requirement of back pressure is generic to all pressure reducingapplications. Pressure reduction even by multiple stage cascading such as in the 7100 Series ARC can minimize therequirement, however no valve design willredefine a fluid’s physical properties.

This becomes especially important inmodulating systems. A fixed orifice will notprovide the proper back pressure at all flowlevels. As the flow in the bypass line is

reduced, the orifice becomes less effective.Proper system design should be used tooptimize valve pressure reduction andconsider all fluid dynamic effectsdownstream of any pressure reducingdevice.

When adequate back pressure is notavailable downstream of a pressurereducing valve, vapor bubbles will form inthe zone just downstream of the valve laststage control surface. This zone is definedas the “Vena Contracta” and represents thepoint of highest fluid velocity and lowestpressure. The potential for 1) damage todownstream piping components and 2)flow reduction exists from this point. Whenline pressure remains below the fluid vaporpressure, any existing bubbles will remainand expand as piping friction furtherreduces line pressure. This can be definedas a “FLASHING CONDITION” and ischaracterized by a polished appearance onaffected surfaces. When the line pressuredrops below the fluid vapor pressure and

then recovers, any entrapped vaporbubbles will collapse (implode). This isdefined as a “CAVITATING CONDITION”and is characterized by a cinder likeappearance on affected surfaces. Theresolution of either condition is bestaddressed by eliminating vapor formation.This can be assured by the provision ofadequate back pressure. The “BackPressure Factor” is key to reliable systemoperation and must not be ignored inpiping design considerations.

As such we feel it is the obligation of aresponsible Automatic RecirculationControl Valve manufacturer to analyze thesystem needs and supply a Back PressureRegulator (BPR) when it is warranted bythe laws of fluid dynamics. For on/offsystems this could be a simple orifice, butfor modulating conditions it must be adevice like the BPR noted herein.



Receiver vessel

Checkvalve

Blockvalve

Back pressureregulator

Outlet(to process)

Bypassoutlet

Inlet

Yarway 9100 ARC Valve

Back Pressure Regulator (BPR)

Flow



Parts and MaterialsItem Part Material

1 Body ASME SA105 Type 3162 Seat SS3 Plunger Guide SS4 Vari-Seal TFE5 Plunger SS6 Spring Inconel®/SS7 Spring Retainer SS8 Spiral Ring Inconel®/SS9 Flow Conditioner SS

10 Retaining Ring SS11 Set Screw SS12 Nameplate13 Nameplate Screw

SS

Option: ASTM A351 GR. CF8M

C

8 10 2 7 5 12, 13 1

11 6 3 4 9

Flow

Back Pressure Regulators (BPR)

B

øA

2 7 10 11 4 3 9

6 1 12 5 138

Flow

Parts and MaterialsItem Part Material

1 Body ASME SA1052 Seat SS3 Plunger Guide SS4 O-ring TFE Propylene5 Plunger SS6 Spring Retainer SS7 Spring Inconel®

8 Seal TFE9 Retaining Ring SS

10 Nameplate SS11 Drive Screw SS12 Spacer SS13 Spiral Ring Inconel®

Dimensions and WeightsBPR Dimensions, in. [mm] WaferSize A B Flanged C Approx.Weight,

+/- 1/16” [1.6] +/- 1/16” [1.6] +/- 1/16” [1.6] lb. (kg)3/4” 11/6 [42.9] 4 [101.6] N/A 5 (2.3)

11/2” 27/8 [73.0] 27/8 [73.0] 6 [152.4] 5 (2.3)2” 35/8 [92.1] 33/8 [85.7] 6 [152.4] 8 (3.6)3” 5 [127.0] 45/8 [117.5] 8 [203.2] 21 (9.5)4” 63/16 [157.2] 53/4 [146.0] 12 [304.8] 40 (18.1)6” 81/2 [215.9] 71/2 [190.5] 17 [431.8] 96 (43.5)

For Flanged 8” and 10”, consult factory.

Wafer BPR - 3/4” thru 6” Remote Mounted Flange BPR - 11/2” thru 10”



How to orderUse the application data form from thewebsite http://sizing.tycovalves.comor provide data necessary for selection andsizing of a valve to meet the protectionrequirements as specified by the pumpmanufacturer. Each valve is selected tomeet the specific application requirements.For full information contact YarwayCorporation.

How to specifyCentrifugal pump minimum flow protectionshall be provided by a self-contained multi-function valve which requires noexternal source of power. The valve shallprovide the functions 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 toprovide the minimum required pumpflow.

4.Pressure reducing device to effectivelyreduce high pump discharge pressuresto low receiver tank/sump pressures.

Actuation of the bypass valve shall be bydirect contact of the switching mechanismto the check valve disc. No levers orlinkages shall be utilized. Bypass trimtravel shall have a 1:1 proportional ratiowith the flow sensing disc travel to providetruly optimum modulated flow control. Onepiece operating element shall be preferredfor maximum reliability. The bypass trimshall also be capable of providing extendedbypass control service. Service limitationsor manual bypass lines for extendedbypass service shall not be acceptable.

The ARC valve shall be designed andconstructed in accordance with ANSIB16.34. Pressure reduction in the bypassshall be the vendor’s responsibility tocontrol flashing, cavitation and choked flowconditions both within the trim and at thevalve discharge. Sealing surfaces in trimshall be located in an area where it will notbe prone to erosion and/or cavitationdamage.

Valves shall be flow tested by themanufacturer, and certified performancecurves shall be provided with the valveshipment.

Maximum main flow [gpm [m3/hr] @ specific gravity = 1]1” 11/2” 2” 3” 4” 6” 8” 10” 12”

[DN25] [DN40] [DN50] [DN80] [DN100] [DN150] [DN200] [DN250] [DN305]

47 110 190 400 700 1600 2800 4500 6500[10.7] [25] [43] [91] [133] [364] [636] [1023] [1477]

Use the Tyco Valves & Controls web-basedYarway ARC sizing program. Register athttp://sizing.tycovalves.com

Then, complete the questions and enteryour application data on the sizing sheet.The program will then size a valve for yourapplication.



Performance – profiled in Yarway’shydraulic performance test labIn our hydraulic performance testlaboratory, state-of-the-art data acquisitionand computer graphics techniques arecalled upon for evaluation of the significantperformance characteristics of Yarwayrecirculation control valves. The lab’sequipment makes it possible to test a valveover its complete flow range for factorsincluding:

• Total flow through pump

• Disc position

• Pressure drop across the main check

• Bypass Cv

• Bypass ∆P

• Valve response to sudden changes inflow

• Bypass leakage Cv

• Bypass piston pressure (7100 Series ARC)

These detailed analyses are the user’scomplete assurance that the valve meetsperformance requirements in all respectsand can be supplied with the valve.

A certified test curve unique for eachapplication and valve selection is providedupon request. Insist on it, as you would foryour pump.

A. Disc LiftB. Bypass CvC. Main Dp

1510

05

2025

.15.10

.0.5

.20.25

Ma

in D

p, P

SID

Dis

c L

ift, Inc

he

s

By

pa

ss

Cv

200 300 5004001000 800 900700600

1015

2520

50

Main Flow, GPM

AB

C

Yarway 6” 9100 ARC ValveNormal flow 630 gpm, min. pump flow 350 gpm, byp. 395 psid



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 MAKESNO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITHRESPECT 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 ORNATURE, INCLUDING INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES) RESULTING FROM THE USE OF OR RELIANCE UPON THIS INFORMATION. Patents and Patents Pending in the U.S. and for-eign countries. Tyco reserves the right to change product designs and specifications without notice.

www.tycovalves.com

Tyco Valves & Controls

Stafford Facility Phone: 281-274-4400

yawmc 0414 us yarway arcv

Documents

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