yawmc 0414 us

Yarway 9100 Series ARC ValveFor Centrifugal Pump Protection

Copyright 2014 Pentair. All rights reserved. YAWMC-0414-US-0909www.pentair.com/valves

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 helps ensure aminimum flow for stable pump operation.

The modulating 9100 ARC createsoperating economies in several ways. TheARC recirculates only the flow requiredto help ensure a minimum flow throughthe pump at all times. Under full processmain flow demand, recirculation flow isnot required. But as the process main flowdemand decreases, recirculation becomesnecessary. Unlike continuousrecirculation, the ARC responds directlyto this need. The use of an ARC valveeliminates the need to oversize the pumpand prime mover. Such oversizing addssignificantly to the capital cost of thepump and prime mover as well as to thecost of energy needed for operation.

An ARC valve also saves most of thecosts of a conventional multiplecomponent flow control loop because thevalve itself is a completely self-containedsystem: it is a flow sensing orifice; a checkvalve; a recirculation control valve and apressure letdown device. As a self-contained system, it requires no instrumentsignal or power source, or any of theassociated maintenance.

Manufactured and tested in the USA, 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 USA alone, morethan 15,000 ARC valves have beeninstalled in power plants, refineries, and chemical plants.

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


Copyright 2014 Pentair. All rights reserved. YAWMC-04142

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

Benefits Eliminates high cost of installation andmaintenance 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.

Feature

Intrinsically safe design with all staticseals, packless design (no stuffingboxes), no leak path to atmosphere, andno electrical wiring.

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

Built-in Check Valve spring-loadedagainst seat, the flow-sensing disc actsas a main flow check valve.Stable Design vibration guide

structures at top and bottom of flow-sensing disc provide full supportto assembly. Top guide includes asnubber to minimize vibration.

Precise Recirculation Control characterized orifices in the bypass element provide accurate, modulated recirculation flow.



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

Check valve

Check valve

Flow fromfeed pump

3R elbowRadius equal to 3 timesnominal pipe size

3R elbowRadius equal to 3 timesnominal pipe size

Flow fromfeed pump

To process To process

Recommended locationof back pressure device

when specified

Gate valve(optional)

Storagevessel

Four-way airsolenoid valve

Flow meter

FIC

Pump

Multiple pressure-reducing orifice

Recirculationcontrol valve

Gate valve(optional)

Checkvalve

Gate or controlvalve

To process

Sensing orifice

Control Loop System

Pump

Automaticrecirculation

valve

Remote back pressureregulator (optional)

Checkvalve

Bypasselement

Storagevessel

Gate or controlvalve

To process

Yarway System



Flow Flow Flow

Head

Min.

Min.

Min.

Head

Head

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,which is flow sensitive, not pressuresensitive. The disc modulates to thedemand for process flow at the sametime helping ensure a minimum flowthrough the pump. This modulatingcharacteristic results in a consistent,stable, and repeatable performance overfull pressure range.

The disc is shown in the closed positionin Figure 1. In this position there is noprocess flow and the bypass is fully open.This protects the pump against plannedor accidental dead heading which canresult from a closed down stream pumpisolation valve 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 totalof process flow and recirculation flowexceed the minimum flow through thepump as specified by the pumpmanufacturer.

When the disc is set at full lift position,as in Figure 3, the bypass is closed. As process flow decreases, the reverseaction occurs and the recirculation flowagain increases. Flow enters the bypasselement at the bottom of the disc

assembly and is controlled bycharacterized orifices inside the discstem. Flow continues through anannulus in the bypass bushing and isdirected to the outlet of the valve.

The valve provides for single phase flow in the bypass, eliminating thepossibility of flashing or cavitation. Thisis accomplished by the valve design, and if necessary, external back pressureregulator.

Operation



The cost of the electricity consumed incontinuous recirculation cooling issignificantly higher than many peoplerealize. For example, the manufacturer of a1200 gpm pump with a discharge head of500 feet, may require 400 gpm recirculated

flow to keep it cool (Figure 4). Continuouslypumping 400 gpm against a 500-foot headrequires 65 horsepower. In a 10/kwhpower cost area, total annual cost savingsusing an ARC valve would be $48,000(Figure 5).

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

400,000

160,000

120,000

80,000

48,00040,000

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

Requirements for Pump Circulation (hp)Figure 4

Assume SP GR = 0.90

Recirculation Volume, gpm

Electric Rate 12/kwh

Power Required for Recirculation (hp)Figure 5

10

Pump Op

erating Co

st (8760 h/yr.) $/yr.

Discharge He

ad (ft. of water)

Discharge Head (psi)



9100 Series ARC Sizes 1" and 11/2"

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

in. [DN] 1/16 [1.6] 1/16 [1.6] 1/16 [1.6] in. [DN] lb. (kg)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 7 3/8 [187] 53/8 [137] 16 [406] 2 [50] 107 (49)600 7 3/4 [197] 53/4 [146] 163/4 [425] 110 (50)150 9 [229] 515/16 [150] 187/8 [479] 205 (93)

4 [100] 300 9 3/8 [238] 61/4 [159] 191/2 [495] 3 [80] 230 (104)600 9 3/4 [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] 22 5/8 [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 Contact your sales representative.12 [305] 600 Contact your sales representative.

Note: 1. Class 150 and 300 9100 ARC valve only offered for exact serial number replacement valves.

Parts and MaterialsItem Part Material1 Body ASTM A351 Type CF8M (J92900)2 Bonnet ASTM A351 Type CF8M (J92900)

3* Disc ASTM A479 Type S21800A (Nitronic 60 Bar)Snubber-seal Turcite 51 (Glyd Ring) and 4* Assembly TFE/Propylene (O-ring)

ASME SA564 Grade 630 5** Bypass Bushing (17-4 PH Bar) Condition SA

(S17400)6** O-ring TFE/Propylene7** O-ring TFE/Propylene8** Spiral Ring Inconel X-7509** Bypass Tube ASTM A312 Type 30410 Spring Retainer ASME SA479 Type 31613 Spring 17-7 PH Condition CH-90014 O-ring TFE/Propylene15 Stud ASTM A193 Grade B7 (G41400)16 Nut ASTM A194 Grade 2H (K04002)18 Nameplate 300 Series Stainless Steel

Items 3 through 14 recommended valve spare parts* Disc furnished with item 4 installed.** Bypass bushing furnished with items 6, 7, 8, and 9.

2

4

18

3

5

6

7

810

1

15

16

14

9

13

C

B

A

4

3

18

2

6

5

7

13108

1

9

14

16

15

C

B

A



Materials of Construction Options1. Stainless Steel

2. 6 Mo Stainless Steel

3. Duplex Stainless Steel

4. NACE Valve conforming to MR01752003 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 withitems 6, 7, 8, and 9.

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

9100 Series ARC Sizes 2" to 12"

2

11

10124

18

356

789

1

15

16

14

13

20

C

B

A

Parts and MaterialsItem Part Material1 Body ASTM A-216 Grade WCB2 Bonnet ASTM A-216 Grade WCB

3* Disc Assembly2" to 6": ASTM A351 Type CF10SMnN

(Bypass Element)(Nitronic 60 Cast) 8" to 12": ASTM A351 Type CF8M Disc with ASTM A479 Type A21800A Stem

Snubber-seal Turcite 51 (Glyd Ring) and4* Assembly TFE/Propylene (O-ring)

5** Bypass Bushing ASTM A747 Grade CB7Cu-1 (17-4 PH Cast) Condition H900 (J92180)6** O-ring TFE/Propylene7** O-ring TFE/Propylene8** Lock Washer ASTM A194 Grade 8 (18-8)9** Lock Nut Stainless Steel 18-8

Upper Guide ASTM A747 Grade CB7Cu-1 10*** Bushing (17-4 PH Cast) Condition A11*** Lock Nut 300 Series Stainless Steel12*** Snubber Orifice Stainless Steel 18-813 Spring 17-7 PH Condition CH-90014 O-ring TFE/Propylene15 Stud ASTM A193 Grade B7 (G41400)16 Nut ASTM A194 Grade 2H (K04002)18 Nameplate 300 Series Stainless Steel

Flow Conditioner 20 (600 class only) ASTM A351 Type CF8M

2

11

10124

35

6

789

1

18

14

13

20

16

15

C

B

A



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 PRVs willexperience a velocity induced recoveryeffect which will limit the amount ofpressure drop a valve can take and cause areduction in flow capacity.The requirement of back pressure isgeneric to all pressure reducingapplications. Pressure reduction even bymultiple stage cascading such as in the7100 Series ARC can minimize therequirement, however no valve design willredefine a fluids 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) flowreduction exists from this point. When linepressure 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 vapor bubbleswill collapse (implode). This is defined as aCAVITATING CONDITION and ischaracterized by a cinder like appearanceon affected surfaces. The resolution ofeither condition is best addressed byeliminating vapor formation. This can beassured by the provision of adequate backpressure. The Back Pressure Factor iskey to reliable system operation and mustnot be ignored in piping designconsiderations.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

Check valve

Back pressureregulator

Outlet(to process)

Bypassoutlet

Inlet

Yarway 9100 ARC Valve

Back Pressure Regulator (BPR)

Flow



Back Pressure Regulator (BPR)

C

8 10 2 7 5 12, 13 1

11 6 3 4 9

Flow

B

A

2 7 10 11 4 3 9

6 1 12 5 138

Flow

Wafer BPR 3/4" to 6" Remote Mounted Flange BPR 11/2" to 10"

Dimensions and WeightsDimensions, in. [mm] Wafer

BPR A B Flanged C Approx. Weight Size +/- 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", contact your sales representative.

2

FlowFlow

7 10 11 4 3 9

6

BC

A

1 12 5 8 13943611

112, 13579 210

Parts and MaterialsItem Part Material1 Body ASME SA1052 Seat ASTM A747-CB7Cu-1 with Heat Treatment

3 Plunger Guide ASME SA564 Type 630 (17-4 PH) H-900 Heat TreatmentEnergized 4 U Cup Seal Filled TFE

5 Plunger ASTM A479-431 Stainless Steel with Heat TreatmentASTM A564 Type 631 (17-7 PH) H-900

6 Spring Heat Treatment7 Spring Retainer AISI 304 Stainless Steel8 Spiral Ring AISI 3029 Flow Conditioner ASME SA747-CB7Cu-110 Retaining Ring AISI 316 Stainless Steel11 Set Screw ASTM A194 Grade 8 (18-8)12 Nameplate AISI 300 Series Stainless Steel13 Drive Screw Stainless Steel

Option: BPR is available in stainless steel configuration upon request.

Parts and MaterialsItem Part Material1 Body ASME SA1052 Seat ASTM A747-CB7Cu-1 with Heat Treatment3 Plunger Guide ASTM A276-S21800 (Nitronic 60 Bar)4 O-ring TFE/P (Fluoraz 799)

5 Plunger AISI 431 Stainless Steel with Heat Treatment6 Spring Retainer AISI 304 Stainless Steel

7 Spring ASTM A564 Type 631 (17-7 PH) H-900 Heat TreatmentEnergized 8 U Cup Seal Filled TFE

9 Retaining Ring AISI 304 Stainless Steel10 Nameplate AISI 300 Series Stainless Steel11 Drive Screw Stainless Steel12 Spacer A269-30413 Spiral Ring Inconel X-750



Performance Profiled in Yarways 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 labs 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 DP Bypass leakage Cv Valve response to sudden changes in flowThese detailed analyses are the users complete assurance that the valve meets performancerequirements in all respects and can be supplied with the valve.

A certified test curve is shipped with each valve (see page 11 for example). Insist on it, as you would for your pump!

Hydraulic Performance Test Lab



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]

0 200 400 600 800 1000 1200 1400 1600

Main Flow (GPM)

200.0

400.0

600.0

800.0

1000.0

1200.0

1400.0

1600.0

Tota

l Flo

w (G

PM)

0.0

0.0

5.0

10.0

15.0

20.0

25.0

Mai

n D

P (P

SID)

0.00

0.50

1.00

1.50

2.00

2.50

Dis

c Li

ft (IN

)

25.0

30.0

0.0

5.0

10.0

15.0

20.0

Byp

as

s C v

0 200 400 600 800 1000 1200 1400 1600

0 200 400 600 800 1000 1200 1400 1600

Main (GPM)0 200 400 600 800 1000 1200 1400 1600

Main (GPM)

Certified Test Curve



How to OrderOur 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.

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.)

Other (Please specify) _________________

Specific Gravity:

Vapor Pressure:

Viscosity:

Fluid

Please Enter Both TemperaturesTemperatureNormal temperature at ARC Valve:

Maximum temperature at ARC Valve:

F C

Please Complete Pressure RequirementsPump Discharge PressurePump pressure at Shut-off (zero flow):

Pump pressure at Normal -Process- flow:

Pump pressure at Minimum -Process- flow (optional): (if Minimum Flow is to be considered in sizing)

Pump pressure at Minimum pump protection flow: (at Minimum required Recirculation Flow)

ARC Valve Bypass line pressure: (Line pressure at ARC Valve bypass port)

psi bar KgF/cm2 Kpa

Pump Flow Please Complete Flow RequirementsNormal -Process- flow:

Maximum -Process- flow:

Minimum -Process- flow (optional): (if Minimum Flow is to be considered in sizing)

Minimum pump protection flow: (Minimum required Recirculation Flow)

GPM M3/H BPD

Additional Info:

E-Mail:

Delivery Required:

Customer:

Company:

Project:

Location:

Phone:

Qty Required:

Tag(s) ID:

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.

yawmc 0414 us

Documents

aminimum flow

arc valves

main flow check valve

arc valveeliminates

recirculation control

recirculation flow isnot

byproviding recirculation

flow sensing element