Clockwise from top right.

BTV-2000PTFE or UHMWPE linedchemical service valve

Atomac ® Lined ball valves• AKH2 full port• AKH2A ANSI dimensional• AKH2.2 DIN dimensional• AKH3 ANSI dimensional• AMP3 3-way• AKH5 ceramic lined• AKH6 tank drain• AKH7 (for glass pipe fitting)• ARV2 check valve• ASG sight glass• ARV/SG check valve/

sight glass• ASF strainer

Sleeveline ®

Non-lubricated, PTFE-sleeved plug valves• G4 Isolation• G4E – DIN Mounting Pad• G4 Marathon™• TSG4 Severe Service

T-Line ®

Non-lubricated, PTFE-lined plug valves• T-41

(ANSI Class 150)• T-43

(ANSI Class 300)

Big Max ®

High performance valves• BX2001 (ANSI Class 150)• MX (ANSI Class 300)

For more information, contact:

Flowserve CorporationFlow Control DivisionCookeville, Tennessee 38501(931) 432-4021

Or Consult Your Local Stocking Distributor

Durco® Big MaxBX2001 ValveA N S I C L A S S 1 5 0 L B . V A L V E S

Designed for Top Performance and Total Value Bulletin V-39f

Flowserve has the answer to your corrosion resistant, quarter-turn valving needs.

Printed in U.S.A.September 1998

© Flowserve Corporation

Durco Valtek (Asia Pacific) Pte. Ltd.Singapore 638824Republic of Singapore65-862-3332

Duriron GmbHAtomac DivisionD-48661 Ahaus, Germany49-6431-96610

Quality System

Certificate

Flats or “double D” on shaft providepositive indication of valve positionand simplified adaption to automaticactuation.

Large diameter, one-piece highstrength shaft reduces deflection forpositive, repeatable shutoff at higher∆P than similar valves.

Independent packing set adjustmentprevents stem seal emissions.

Wide choice of packing materialsincluding adjustable and self-adjusting live-loaded with leakdetection port or purge fittings forlethal, toxic or sub zero services.

Positioning holes on wafer bodyallow easy installation and properalignment between flanges.

Poly Lube® bearings (Teflon andfilament wound fiberglass) oroptional Riload ® bearings both offerlow torque and high cycle life.

360° O-ring squarely and securelylocks retainer ring into valve body.Full coverage retainer ring allowscomplete compatibility with allgaskets and no interruption in the sealing surface.

Integral cast overtravel disc stop is designed into the casting, notwelded in place as an afterthought.

Blind bottom shaft hole eliminatespotential leak point.

Compact construction allowsinstallation in tight spaces.

Economical, simplified field repairdue to minimum parts,interchangeable disc and shaft, andsimple assembly procedures.

All carbon steel bodies electrostaticepoxy coated for enhancedcorrosion protection.

Total QualityBX2001 effectively contains fugitive

process media emissions regulated bythe federal Clean Air Act, includingchlorine, hydrofluoric acid andanhydrous HCl. Ideal choice for precisethrottling control or on-off service withlighter weight piping systems and lessexpensive, energy efficient actuators.

Superior Features• Primary stem seal plus two optional

secondary seals provide triple leakprotection.

• Retainer is locked in the valve bodyby a unique lock or fasteners,depending on size.

• Adjustable, live-loaded packingadapter option is available.

• Self-adjusting, self-contained,constant preload stem seal optionmay be specified.

• Low profile disc increases capacityand provides better flow control.

• Wide range of optional materialsinclude: D20, DMM, DC2, DC3, DNIand DINC.

BX2001 features a double offset disc whichcreates an eccentric seating action. This actioneliminates seat wear, reduces opening torquewhen seat is upstream and allows disc to “cam”into seat for tight shutoff.

PFA Teflon®/Viton A energized seat providespositive, bidirectional shutoff with long cycle lifeon low pressure and vacuum, and high ∆Pservices. (See page 5 for more informationabout seating.)

World Class Valve Performance• All castings meet rigid ASTM

standards.• All BX2001 valves comply with ANSI

B16.34, ANSI B16.5, ANSI B16.10,MSS SP68, MSS SP61, API 598, API607, API 609, and ISO 5752.

• All PFA Teflon® seated valves andoptional UHMWPE seated valves aretested in accordance with ANSI B16.34 and MSS SP61. No through orexternal leaks are allowed, therebyexceeding the shutoff requirementsof ANSI/FCI 70-2 for all classes.

• All TriFlex metal seated valves aretested to ANSI/FCI 70-2 Class VIleakage rates.

• All valves available in ANSI Class 150DIN PN 16 or DIN PN 20 drilling.

Unique, high strength Gibb pin positively locksvalve shaft to the disc. Gibb pin is used on 2 in(50 mm) through 12 in (300 mm) sizes.

Durco BX2001 Performance Plus Economy Equals Total Value

2

The Big Max BX2001 high

performance valve is a

superior quality, ANSI

Class 150 valve available

in standard PFA Teflon® and

optional UHMWPE, fire

sealed and TriFlex® metal

seated versions. Offered in

2 in (50 mm) through 36 in

(900 mm) sizes and in both

wafer and lug body designs,

all are available with a wide

variety of packing options

to meet your routine or

most rigid service

requirements.

Blow-out proof stem design guards againstcatastrophic leakage and stem blow-out in theevent of shaft failure.

Fire Sealed ValvesLow Priced Valve Security

The fire sealed version BX2001meets API 607 Requirements. If a firedestroys the PFA Teflon/Viton O-ringenergized primary seat, the InconelX750 metal backup seat activates toprovide positive sealing. Shaft packingand gaskets are made of Grafoil® toprevent both through and externalleaking. Shaft packing performance isenhanced by the Durco rocker armadjuster.Note: The use of lug body style is recommendedfor fire sealed valves.

UHMWPE SeatsFor Abrasive Services

BX valves with ultra high molecularweight polyethylene (UHMWPE) seats will provide long-lasting performance in erosive/abrasive services while alsooffering limited corrosion resistance.UHMWPE seats are rated for services to 200°F (93°C).

Stuffing Box Packing Options

Fire Sealed, DoubleGrafoil WithLantern Ring

Primary seat before fire

UHMWPE Seat

TriFlex Metal Seated ValvesUniquely Designed for Reliable, TightShut-off Performance

The Durco TriFlex Big Max is a trulyunique dynamically sealed metal-to-metalseated valve. Taking maximum advantageof specialty high temperature alloys,TriFlex utilizes the sleeve and coil actionof three individual springs plus theenergizing force of process fluid pressureto provide outstanding shutoff service.These highly resilient springs also offerexcellent corrosion and abrasionresistance for extended service life.

Triple Super Seal For ToxicServices

This ultimate protection packagefeatures compression springs whichkeep constant preload on the doublePTFE cup and cone stem packing.Lantern ring allows use of leakdetection and monitoring devices with optional 1/8 in (3 mm) NPTconnections. This self-adjusting, selfcontained sealing system applies thebest available environmental protectiontechnology. Available through 12 in(300 mm) size.

Standard, single PTFE cupand cone.

Double PTFE cup and cone withlantern ring for leakage

monitoring.

Live loaded, single PTFE cup andcone (adjustable).

Live loaded, double PTFE cup andcone with lantern ring (adjustable).

Triple seal, single PTFE cup and cone(self-adjusting/self contained).

2 in (50 mm) – 12 in (300 mm) only

BX2001Stuffing BoxPacking Options

BX2001Seat Design

Options

4

Note: All lantern ring packingson this page and page 5 areillustrated with two optional1/8 in (3 mm) NPT purgeconnections. One 1/8 in (3 mm)bleed or injection port is alsoavailable.

Flowserve offers a wide

variety of packing options to

most cost-effectively suit

your service requirements.

Fluid Pressure With Seat Upstream Fluid Pressure With Seat Downstream

• Exceptional Cycling Performance• Reasonable Seating/Unseating Torque• Inherently Fire-Safe by Design• Bi-Directional Seating

Metal seat after fire

Standard Fire Sealed,Single Grafoil

• Available Up To 1000˚F (538˚C)• Testing to ANSI/FCI 70-2

Class VI shut off

Item No. Description Qty. Carbon Steel Stainless Steel1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF-8M2 Disc 1 ASTM A351 Gr. CF-8M (ENC) ASTM A351 Gr. CF-8M (ENC)

3 Shaft 1 ASTM A564 Type 630 17-4 S.S. to 600 Deg. F ASTM A564 Type 630 17-4 S.S. to 600 Deg. FASTM A479 Type XM19 S.S. - 601 to 800 Deg. F ASTM A479 Type XM19 S.S. - 601 To 800 Deg. F

4 Pin 1 ASTM A564 Type 630 17-4 S.S. to 600 Deg. F ASTM A564 Type 630 17-4 S.S. to 600 Deg. FASTM A479 Type XM19 S.S. - 601 to 800 Deg. F. ASMT A479 Type XM19 S.S. - 601 to 800 Deg. F

5 Bearing 2 Teflon/Fiberglass - to 400 Deg. F. Teflon/Fiberglass - to 400 Deg. F316 S.S. Chrome Plated - 400 to 800 Deg. F 316 S.S. Chrome Plated - 400 to 800 Deg. F

6 Thrust Bearing 2 ASTM Type 630 17-4 S.S. to 600 Deg. F ASTM Type 630 17-4 S.S. to 600 Deg. FASTM A479 Type XM19 S.S. - 601 to 800 Deg. F. ASMT A479 Type XM19 S.S. - 601 to 800 Deg. F

7 Thrust Washer 2 1018 Steel to 600 Deg. F 316 S.S. to 600 Deg. FASTM A479 Type XM19 S.S. - 601 to 800 Deg. F. ASMT A479 Type XM19 S.S. - 601 to 800 Deg. F

8 Packing Set 1 PTFE Cup and Cone to 400 Deg. F. PTFE Cup and Cone to 400 Deg. FGrafoil - 400 to 800 Deg. F. Grafoil - 400 to 800 Deg. F

9 Gland 1 303 S.S. 303 S.S.10 Adjuster 1 ASTM A744 Gr. CD4MCu ASTM A744 Gr. CD4MCu11 Stud-Adjuster 2 Gr. B-7 Gr. B-712 Nut-Adjuster 2 Gr. 2H Gr. 2H13 Ground Spring 1 302 S.S. 302 S.S.14 Retainer Ring 1 ASTM A516 Gr. 70 Carbon Steel ASTM A240 Type 316 S.S.15 Lock Ring 1 Inconel Inconel16 Seat 1 Inconel X750 Std. - Others as specified Inconel X750 Std. - Others as specified19 Jam Nut 1 300 Series S.S. 300 Series S.S.

TriFlex Valve

End Of Line Lug ValveItem No. Description Qty. Carbon Steel Stainless Steel1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF-8M

2 Disc 1 ASTM A351 Gr. CF-8M or ASTM A351 Gr. CF-8MASTM A216 Gr. WCB-EN.C

3 Shaft 1 ASTM A564 Type 630 17-4 S.S. ASTM A564 Type 630 17-4 S.S.4 Pin 1 ASTM A564 Type 630 17-4 S.S. ASTM A564 Type 630 17-4 S.S.5 Bearing * Teflon/Fiberglass (■ PTFE/316 S.S.) Teflon/Fiberglass (■ PTFE/316 S.S.)6 Thrust Bearing 2 ASTM A564 Type 630 17-4 S.S. ASTM A564 Type 630 17-4 S.S.7 Thrust Washer 1 1018 Steel 316 S.S.

•8 Packing Set 1 PTFE Cup and Cone (■ Grafoil) PTFE Cup and Cone (■ Grafoil)9 Gland 1 303 S.S. 303 S.S.

10 Adjuster 1 ASTM A744 Gr. CD4MCu ASTM A744 Gr. CD4MCu11 Stud-Adjuster 2 B8-40 (■ Gr. B-7) B8-40 (■ Gr. B-7)12 Nut-Adjuster 2 Gr. 8 (■ Gr. 24) Gr. 8 (■ Gr. 24)13 Ground Spring 1 302 S.S. 302 S.S.14 Retainer Ring 1 ASTM A516 Gr. 70 Carbon Steel ASTM A240 Type 316 S.S.

•15 Lock Ring 1 Viton A** Viton A•16 Seat 1 PFA Teflon PFA Teflon•17† Seat Energizer 1 Viton A** Viton A18† Seat Ring 1 1020 Steel ASTM A240 Type 316 S.S.19 Jam Nut 1 300 Series S.S. 300 Series S.S.

•20 Gasket-Fire Seal 3 ■ Grafoil*** ■ Grafoil•21 Seat-Fire Seal 1 ■ Inconel X750 ■ Inconel X75022 Capscrew As Req’d Chrome Steel Chrome Steel

•33 Seat 1 UHMWPE UHMWPE

Standard Valve

* 2 in (50 mm) through 8 in (200 mm) have 2 upper and 1 lower bearing, 10 in (250 mm) and 12 in (300 mm) have 3 upper and 2 lower bearings as standard. All Fire Sealed have1 upper and 1 lower bearings. **Registered trademark of the DuPont Company ***Registered trademark of Union Carbide †Not required with UHMWPE seat

■ Materials for Fire Sealed valves only. • Recommended spare parts.

BX2001 Parts List2 in (50 mm) Thru 12 in (300 mm) Sizes

6

Fire Sealed Valve

Optional UHMWPE Seat

TriFlex

Sizes 14 in (350 mm), 16 in (400 mm), 18 in (450 mm) only

Sizes 14 in (350 mm),16 in (400 mm), 18 in (450 mm) only

For Sizes 20 in (500 mm), 24 in (600 mm), 30 in(750 mm), 36 in (900 mm)

For Sizes 20 in (500 mm), 24 in (600 mm), 30 in(750 mm), 36 in (900 mm)

For Sizes 20 in (500 mm), 24 in (600 mm), 30 in (750 mm),36 in (900 mm)

Item No. Description Qty. Carbon Steel Stainless Steel1 Body 1 ASTM A216 Gr. WCB ASTM A351 Gr. CF8M

2 Disc 1 ASTM A351 Gr. CF8M ASTM A351 Gr. CF8Mor ASTM A216 Gr. WCB Nickel Plated

2A Taper Pins 2 ASTM A276 Type 316 Condition B ASTM A276 Type 316 Condition B♦ ASTM A276 Type 316 Condition B - To 600 Deg. F ♦ ASTM A276 Type 316 Condition B - To 600 Deg. F

Monel K-500 - 600-800 Deg. F Monel K-500 - 600-800 Deg. F2B Shaft 1 ASTM A564 UNS S17400 Type 630 ASTM A564 UNS S17400 Type 630

♦ For services above 600°F, shaft material ♦ For services above 600°F, shaft materialwill be ASTM A479 Type XM-19 will be ASTM A479 Type XM-19

•3 Packing Set 2 PTFE Teflon (■Grafoil)** PTFE Teflon (■Grafoil)**♦ PTFE Teflon - To 400 Deg. F ♦ PTFE Teflon - To 400 Deg. F

Grafoil** - 400-800 Deg. F Grafoil** - 400-800 Deg. F4 Packing Gland 2 300 Series Stainless Steel 300 Series Stainless Steel5 Thrust Washer 2 PTFE Teflon PTFE Teflon

14 in (350 mm), 16 in (400 mm), ♦ PTFE Teflon - To 400 Deg. F ♦ PTFE Teflon - To 400 Deg. F18 in (450 mm) only Grafoil** - 400-800 Deg. F Grafoil** - 400-800 Deg. F

6 Packing Washer 2 Carbon Steel 316 Stainless Steel7 Bearing Assembly 2 Teflon/Fiberglass (■Teflon/316 S.S.) Teflon/Fiberglass (■Teflon/316 S.S.)

♦ Teflon/Fiberglass - To 400 Deg. F ♦ Teflon/Fiberglass - To 400 Deg. F316 S.S. - Chrome Plated - 400-800 Deg. F 316 S.S. - Chrome Plated - 400-800 Deg. F

8 Adjuster Fastener 4 ASTM A193 Gr. B8 (■Gr. B7) ASTM A193 Gr. B8 (■Gr. B7)♦ ASTM A193 Gr. B8 - To 400 Deg. F ♦ ASTM A193 Gr. B8 - To 400 Deg. FASTM A193 Gr. B7 - 400-800 Deg. F ASTM A193 Gr. B7 - 400-800 Deg. F

9 Packing Adjuster 1 ASTM A744 Gr. CD4M-Cu ASTM A744 Gr. CD4M-Cu10 Grounding Spring 1 300 Series Stainless Steel 300 Series Stainless Steel11 Retainer Ring 1 ASTM A516 Gr. 70 ASTM A240 UNS S31600 Type 31612 Seat Ring 1 Carbon Steel ASTM A240 UNS S31600 Type 316

•13 Seat Energizer 1 Viton A* Viton A*•14 Seat 1 PFA Teflon PFA Teflon•15 Retainer Fastener 6 300 Series Stainless Steel 300 Series Stainless Steel•16 Fire-Sealed Seat 1 ■Inconel X750 ■Inconel X750•17 Retainer Gasket 1 ■Grafoil** ■Grafoil**•18 Seat Gasket 2 ■Grafoil** ■Grafoil**19 Jamb Nut 4 300 Series Stainless Steel 300 Series Stainless Steel20 Thrust Bearing 2 PTFE Teflon PTFE Teflon21 Thrust Washer 2 300 Series Stainless Steel 300 Series Stainless Steel22 Adjustment Stud 1 Carbon Steel - Zinc Plated 304 Stainless Steel23 Support Stud 4 Carbon Steel - Zinc Plated 304 Stainless Steel24 Lock Washer 4 Carbon Steel 300 Series Stainless Steel25 Nut 4 Carbon Steel ASTM A194 Gr. 826 Thrust Plate 1 Carbon Steel - Zinc Plated 304 Stainless Steel

•27 Seat 1 ♦ Inconel X750 Std. – Others As Specified ♦ Inconel X750 Std. – Others As Specified

■ Materials for Fire Sealed valves only♦ Materials for TriFlex valves only• Recommended spare parts* Registered trademark of Union Carbide**Registered trademark of DuPont Company

Standard Valve

Fire Sealed Valve

TriFlex Valve

BX2001 Parts List14 in (350 mm) Thru 36 in (900 mm) Sizes

BX2001 Parts List14 in (350 mm) Thru

36 in (900 mm) Sizes

8

Dimensions Common to BX2 Wafer and Lug ValvesSize A A1 B C D D1 G G1 H H1 J Q T Y Z Shaftin in in in in in in in in in in in in in in in in Ø

(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)

2 13/4 11/16 37/8 13/8 21/2 21/2 35/8 5/8 11/16 41/2 1/2-13 43/4 211/16 5/8

(50) (44) (27) (98) (35) (64) (64) (920) (16) (17) (114) 5/8 DP (121) (69) (16)

3 17/8 11/8 5 17/16 31/8 31/8 35/8 5/8 11/16 41/2 1/2-13 51/2 211/16 5/8

(80) (48) (29) (127) (36) (79) (79) (92) (16) (17) (114) 5/8 DP (140) (68) (16)

4 21/8 11/4 63/16 11/2 35/8 47/32 35/8 5/8 11/16 41/2 1/2-13 6 211/16 5/8

(100) (54) (32) (157) (38) (92) (107) (92) (16) (17) (114) 5/8 DP (152) (68) (16)

5 21/4 15/16 75/16 215/16 43/16 43/16 41/4 11/8 11/16 51/4 1/2-13 61/2 313/16 7/8

(125) (57) (33) (186) (75) (106) (106) (108) (29) (17) (133) 5/8 DP (165) (97) (22)

6 21/4 15/16 81/2 17/8 411/16 55/32 41/4 11/8 11/16 51/4 1/2-13 7 313/16 7/8

(150) (57) (33) (216) (47) (119) (131) (108) (29) (17) (133) 5/8 DP (178) (97) (22)

8 27/16 13/8 105/8 2 6 65/16 41/4 11/8 11/8 6 1/2-13 81/4 41/4 13/32

(200) (62) (35) (270) (51) (152) (160) (108) (29) (29) (152) 5/8 DP (210) (108) (28)

10 215/16 111/16 123/4 23/8 73/4 73/4 51/4 11/4 11/8 61/2 5/8-11 10 41/4 13/8

(250) (75) (43) (324) (60) (197) (197) (133) (32) (29) (165) 3/4 DP (254) (108) (35)

12 35/16 115/16 15 23/8 9 91/4 51/4 11/4 11/2 7 5/8-11 111/2 43/4 15/8

(300) (84) (49) (381) (60) (229) (235) (133) (32) (38) (178) 3/4 DP (292) (121) (41)

14 33/4 29/32 161/4 23/4 14 65/8 11/2 11/2 8 1/2-13 121/2 47/8 13/4

(350) (95) (58) (413) (70) (356) (168) (38) (38) (203) 3/4 DP (317) (124) (44)

16 41/8 213/32 181/2 33/16 157/8 7 11/2 21/8 9 1/2-13 143/16 6 2

(400) (105) (61) (470) (81) (403) (178) (38) (54) (228) 3/4 DP (360) (152) (51)

18 45/8 217/32 21 31/16 177/8 7 11/2 23/8 9 1/2-13 1515/16 61/8 21/4

(450) (118) (64) (533) (78) (454) (178) (38) (60) (228) 3/4 DP (404) (155) (57)

20 51/8 225/32 23 43/8 245/16 71/2 2 23/4 9 3/4-10 163/4 71/8 21/2

(500) (130) (71) (584) (111) (617) (191) (51) (70) (228) 1 DP (425) (181) (64)

24 63/16 35/32 271/4 51/8 271/2 813/16 2 31/8 107/8 3/4-10 193/4 77/16 3

(600) (157) (80) (692) (130) (698) (224) (51) (79) (276) 1 DP (501) (189) (76)

30 71/2 4 333/4 51/2 321/4 813/16 2 3 111/4 3/4-10 241/4 73/4 31/2

(750) (191) (102) (857) (139) (819) (224) (51) (76) (285) 1 DP (616) (197) (89)

36 81/16 47/32 401/4 61/4 411/2 91/2 4 5 111/2 3/4-10 301/4 121/4 4

(900) (205) (107) (1022) (158) (1054) (241) (102) (127) (292) 1 DP (768) (311) (102)

.440 .589

.438 .58411.17 14.96(11.13) (14.83).440 .589.438 .584

11.17 14.96(11.13) (14.83).440 .589.438 .584

11.17 14.96(11.13) (14.83).623 .812.621 .807

15.82 20.62(15.77) (20.50).623 .812.621 .807

15.82 20.62(15.77) (20.50).748 1.057.746 1.052

19.00 26.85(18.95) (26.72).873 1.339.871 1.334

22.17 34.01(22.12) (33.88).997 1.500.995 1.495

25.32 38.10(25.27) (37.97)1.1241.122

28,549(28,498)1.2481.246

31,699(31,648)1.2481.246

31,699(31,648)1.8741.872

47,599(47,548)2.2502.248

57,150(57,099)2.6242.622

66,649(66,598)2.9062.904

73,812(73,762)All dimensions are approximate and for illustration purposes only. For exact dimensions request certified dimensional prints.

Disc Projection Gear LeverSize A B K L L1 M N W X M Win in in in in in in in in in Gear in in

(mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) Type (mm) (mm)

2 3/8 11/4 77/8 31/8 15/8 815/16 8 51/4 115/16HF-MX30 81/16 14

(50) (10) (32) (200) (79) (41) (227) (203) (133) (49) (205) (355)

3 11/16 27/16 85/8 31/8 15/8 911/16 8 51/4 115/16HF-MX30 813/16 14

(80) (17) (62) (219) (79) (41) (246) (203) (133) (49) (224) (355)

4 11/8 35/8 91/8 31/8 15/8 103/16 8 51/4 115/16HF-MX30 95/16 14

(100) (29) (92) (232) (79) (41) (259) (203) (133) (49) (236) (355)

5 11/2 41/2 103/4 35/8 21/2 121/4 8 63/4 23/8 HF-MZ30 117/16 14

(125) (38) (114) (273) (92) (64) (311) (203) (171) (60) (290) (355)

6 21/16 59/16 111/4 35/8 21/2 123/4 8 63/4 23/8 HF-MZ30 117/16 14

(150) (52) (141) (286) (92) (64) (324) (203) (171) (60) (290) (355)

8 25/8 7 127/8 43/8 21/2 143/4 12 81/4 25/8 HF-MV 131/8 24

(200) (67) (178) (327) (111) (64) (375) (305) (210) (67) (333) (610)

10 35/8 95/16 145/8 43/8 21/2 161/2 12 81/4 25/8 HF-MV Not

(250) (92) (237) (371) (111) (64) (419) (305) (210) (67) Available

12 41/2 113/8 161/16 5 21/2 181/8 12 93/4 31/32HF-MY40 Not

(300) (114) (289) (408) (127) (64) (460) (305) (248) (77) Available

14 5 1245/64 175/8 65/8 31/2 193/4 18 103/16 43/8 MB-60 Not

(350) (127) (323) (448) (168) (89) (502) (457) (259) (111) Available

16 525/32 1445/64 1913/16 75/8 31/2 221/16 18 123/16 53/8 MC-60 Not

(400) (147) (373) (503) (194) (89) (560) (457) (310) (137) Available

18 63/8 169/16 2115/32 75/8 31/2 233/4 18 123/16 53/8 MC-60 Not

(450) (162) (420) (545) (194) (89) (603) (457) (310) (137) Available

20 73/32 1815/32 227/8 75/8 31/2 259/64 18 123/16 53/8 MC-60 Not

(500) (180) (469) (581) (194) (89) (649) (457) (310) (137) Available

24 85/16 223/32 261/16 91/8 43/8 297/16 18 153/4 23/8 MDF/S3 Not

(600) (211) (561) (662) (232) (111) (748) (457) (400) (60) Available

30 11 283/8 311/4 97/16 43/4 345/8 18 1615/32 211/16MGF/S3 Not

(750) (279) (721) (794) (240) (121) (879) (457) (418) (68) Available

36 1341/64 343/8 401/4 97/16 43/4 435/8 24 1723/32 211/16 HFMGF/S5 Not

(900) (346) (873) (1022) (240) (121) (1108) (610) (450) (68)FOR 195

AvailablePSIG ∆P36 1341/64 343/8 401/4 911/16 43/4 473/4 24 2011/32 6 HFMGF/D9 Not

(900) (346) (873) (1022) (240) (121) (1108) (610) (450) (68)FOR 285

AvailablePSIG ∆P

All dimensions are approximate and for illustration purposes only. For exact dimensions request certified dimensionalprints.

BX2001Dimensions ForValves with Actuators

BX2001Dimensions For

Wafer and Lug Valves

10

The Durco Big Max

BX2001 valve is designed

for installation between

ANSI B16.5 Class 150

flanges. All styles of metallic

flanges are permissible if

clearance is provided for the

swing of the disc. Install the

valve with the disc in the

closed position. Valve

should be centered between

flanges in order that the disc

does not hit the flange/pipe

when the valve is opened.

2 in (50 mm) - 12 in (300 mm) 14 in (350 mm) - 18 in (450 mm) 20 in (500 mm) - 24 in (600 mm) 30 in (750 mm) - 36 in (900 mm)

T ø (2) Holes2 in (50 mm), 3 in (75 mm),

4 in (100 mm)

T ø (4) Holes6 in (150 mm), 8 in (200 mm),

10 in (250 mm), 12 in (300 mm)

Pressure/Temperature Ratings†

Valves with PTFE packing and PFA Teflon or UHMWPE seats are rated for Vacuum Service to .02mmHg absolute pressure or 20 microns.

*Retainer ring must be supported by a mating flange.

Specifications, special tests and listingsapplicable to Big Max valves. Otherspecifications may apply and thoselisted may be only partially applicable.Each should be evaluated on a case bycase basis. Contact Flowserve with yourparticular requirements.

Standard Big Max valves with PTFEpacking and Teflon PFA seats are ratedfor Vacuum Service to .02 mm Hg absolute pressure or 20 microns. Forvacuum services beyond this, pleaseconsult your Flowserve SalesRepresentative.

Valve Standards* Applicable to BX and TriFlexSpecification TitleANSI B16.10 Valves – face-to-face dimensionsANSI B16.34 Valves – flanged and butt-welding endANSI B16.5 Pipe flanges and flanged fittingsANSI/FCI 70-2 American National standard for control valve seat leakageMSS SP68 High Pressure – offset seat butterfly valvesISO 5752 Metal valves for use in flanged pipe systems – face-to-face & center-to-face

dimensionsAPI 609 Butterfly valves, lug-type and wafer-typeMSS SP61 Pressure TestingAPI 607 Fire Test procedures and leakage requirementsNACE MR-01-75 Flowserve Corporation can furnish valves to this specification with modifications

to our standard bill of materials.United States Flowserve Corporation is listed with The U.S.Coast Guard Department of Transportation, United States Coast Guard as an acceptable

manufacturer of valves and has received an affidavit listing for valves.

*Other specifications may apply and those listed may be only partially applicable. Each should be evaluated on a caseby case basis. Contact Flowserve with your particular requirements.

*Values given are in accordance with ANSI B16.34, 1988 Edition. For materials of construction ortemperatures other than those listed, consult the factory as the pressure-temperature ratings may vary.

†BX2L4 valves rated to 150 psi with retainer ring unsupported. BX2L1 is not rated for end-of-line servicewhen retainer ring is unsupported.

Wafer Style – 150# Drilling Lug Style – 150# DrillingSize No. of Hole Size B.C. No. of Thread Size B.C. B1

in (mm) Holes Inch in (mm) Fasteners Inch in (mm) in (mm)

2 (50) 4 3/4 43/4 (121) 4 5/8-11 43/4 (121) 6 (152)

3 (80) 2 3/4 6 (152) 4 5/8-11 6 (152) 71/2 (191)

4 (100) 2 3/4 71/2 (191) 8 5/8-11 71/2 (191) 9 (229)

6 (150) 2 7/8 91/2 (241) 8 3/4-10 91/2 (241) 11 (279)

8 (200) 2 7/8 113/4 (298) 8 3/4-10 113/4 (298) 131/2 (343)

10 (250) 2 1 141/4 (362) 12 7/8-9 141/4 (362) 16 (406)

12 (300) 2 1 17 (432) 12 7/8-9 17 (432) 19 (483)

14 (350) 4 11/16 183/4 (476) 12 1-8 183/4 (476) 21 (533)

16 (400) 4 11/16 211/4 (540) 16 1-8 211/4 (540) 231/2 (597)

18 (450) 4 13/16 223/4 (578) 16 11/8-8 223/4 (578) 25 (635)

20 (500) 8* 11/8-8 25 (635) 20* 11/8-8 25 (635) 271/2 (699)

24 (600) 8* 11/4-8 291/2 (749) 20* 11/4-8 291/2 (749) 32 (813)

30 (750) 16** 11/4-8 36 (914) 28** 11/4-8 36 (914) 383/4 (984)

36 (900) 16** 11/2-8 423/4 (1086) 32** 11/2-8 423/4 (1086) 46 (1168)

Big Max high performance butterflyvalves meet the following flangespecifications:ANSI B16.5 2 in (50 mm) -

24 in (600)MSS SP44 30 in (750 mm) &

36 in (900 mm)ANSI B16.47 30 in (750 mm) &(Series A) 36 in (900 mm)

Maximum Differential PressuresValve Size Max ∆P –

in (mm) Valve 90° open†

3 34 PSIG(80) (234.4 kPa)

4 16 PSIG(100) (110.3 kPa)

6 7 PSIG(150) (48.3 kPa)

8 5 PSIG(200) (34.5 kPa)

†Based on a 120 pound maximum force on wrench.See MSS SP91 for further clarification.

BX Manual Operator WeightsValve Size Locking

in Lever Gear(mm)

2 6 lbs 11 lbs(50) 2.7 kg 5 kg

3 6 lbs 11 lbs(80) 2.7 kg 5 kg

4 6 lbs 11 lbs(100) 2.7 kg 5 kg

6 6 lbs 11 lbs(150) 2.7 kg 5 kg

8 20 lbs 28 lbs(200) 9.1 kg 12.7 kg

10 N/A 28 lbs(250) 12.7 kg

12 N/A 31 lbs(300) 14 kg

14 N/A 64 lbs(350) 29.0 kg

16 N/A 76 lbs(400) 34.5 kg

18 N/A 76 lbs(450) 34.5 kg

20 N/A 76 lbs(500) 34.5 kg

24 N/A 101 lbs(600) 45.8 kg

30 N/A 156 lbs(750) 70.8 kg

HFM GF/S5156 lbs

36 70.8 kg(900) N/A HFM GF/D9

224 lbs101.6 kg

BIG MAX BX Valve Weights* In Pounds (Kilograms)

Valve Sizein BX2W BX2L

(mm)

2 12 lbs 12 lbs(50) 5.4 kg 5.4 kg

3 16 lbs 18 lbs(80) 7.3 kg 8.2 kg

4 20 lbs 26 lbs(100) 9.1 kg 11.8 kg

5 30 lbs 35 lbs(125) 13.5 kg 15.8 kg

6 35 lbs 40 lbs(150) 15.9 kg 18.1 kg

8 58 lbs 68 lbs(200) 26.3 kg 30.8 kg

10 86 lbs 104 lbs(250) 39 kg 47.1 kg

12 125 lbs 160 lbs(300) 56.7 kg 72.6 kg

14 250 lbs 300 lbs(350) 113.4 kg 136 kg

16 325 lbs 400 lbs(400) 147.4 kg 181.4 kg

18 400 lbs 500 lbs(450) 181.4 kg 226.8 kg

20 467 lbs 624 lbs(500) 211.8 kg 283 kg

24 665 lbs 880 lbs(600) 301.6 kg 399 kg

30 1050 lbs 1425 lbs(750) 476.3 646.4 kg

36 2162 lbs 2748 lbs(900) 980.7 kg 1246.5 kg

BX2001Dimensions andOperator Weights

TechnicalData

12

Due to the hydrodynamic

torque encountered with

butterfly valves, safe

operating practices dictate

that manual gear operators,

pneumatic actuators or

electric actuators be used

when the following

differential pressures

are exceeded.

* The two fastener holes on either side of the shaft, top and bottom, are tapped blind holes. (Both Sides)**Four fastener holes, two on either side of the shaft top and bottom, are tapped blind holes, both sides.All dimensions are approximate and for illustration purposes only. For exact dimensions request certifieddimensional prints.

PFA, UHMWPE and Fire-Sealed Seats

TriFlex Metal Seats

BX2001 lug style valve withAutomax Super Nova® rack andpinion actuator and UltraSwitch ®.

BX2001 wafer style valve withAutomax Super Nova® rack andpinion actuator and Apex 5000™modular positioning system.

Materials Selection ChartDS = ASTM A216 Gr. WCB (CAST STEEL)

D2 = ASTM A351 Gr. CF8 (304 S.S.)

D4 = ASTM A351 Gr. CF8M (316 S.S.)

D20 = ASTM A351 Gr. CN-7M (DURIMET 20)

CK3M = ASTM A351 Gr. CK-3MCuN (254 SMO)*

DINC = ASTM A494 Gr. CY-40 (INCONEL 600)**

DMM = ASTM A494 Gr. M35-1 (MONEL 400)**

DNI = ASTM A494 Gr. CZ-100 (NICKEL 200)

DC2 = ASTM A494 Gr. N-7M (CHLORIMET 2)

DC3 = ASTM A494 Gr. CW-6M (CHLORIMET 3)* Registered trademark of Avesta AB**Registered trademark of International Nickel Co. Inc.

FlowservePuts You In Control

How To SpecifyBX2001 Valves

14

For precise throttling

control or simple on-off

operation of Big Max valves

the best choice is Automax

actuators, controls and

accessories. Flowserve’s

Automax offers a broad line

of rack and pinion actuators

along with heavy-duty

and electric actuators.

Engineered special control

circuits, solenoid valves,

limit switches, positioners

and actuator mounting

kits complete the

product offering.

Size Type Body Class Materials Seal Seat Operator Options

Valve Size

TypeSelection Code

Big Max 2001 BX2Body

Selection CodeLug L

Wafer WClass

Selection CodeANSI 150 1DIN PN10 2

ANSI 150 Bidirectional Lug 4DIN PN16 5DIN PN20 7

Body Material

Disc Material

Shaft Material

Bearing Material

Shaft SealSelection Code

Single PTFE Cup & Cone* 1Double PTFE Cup & Cone 2Live Loaded Single C&C** 3Live Loaded Double C&C** 4

Triple Seal Single PTFEC&C (Self-Adjusting) 7

Triple Seal Double PTFEC&C (Self-Adjusting) 8

Single Grafoil ■ 9Double Grafoil 10

Seat

Operator

Options

Selection, Installation, Operation andMaintenanceAlthough Flowserve can, and often does,provide general guidelines, it is obviously notpossible to provide application specific dataand warnings for all conceivable applications.The purchaser/end user must thereforeassume the ultimate responsibility for theproper selection, installation, operation andmaintenance of the products. Read theappropriate IOM available from Cookeville,TN 38501 before installing, operating orrepairing any valve. The purchasers/end usershould train its employees and/or contractorsin the safe use of the Flowserve products inconnection with the purchaser’s manufac-turing processes.

Design ChangesIn order to follow Flowserve’s commitment tocontinuous improvement, we reserve theright to change product and performance specifications without notice.

Selection Code2 in (50mm) 23 in (80mm) 34 in (100mm) 45 in (125mm) 56 in (150mm) 68 in (200 mm) 810 in (250mm) 1012 in (300mm) 12

Selection Code14 in (350mm) 1416 in (400mm) 1618 in (450mm) 1820 in (500mm) 2024 in (600mm) 2430 in (750mm) 3036 in (900mm) 36

Selection CodeD4*■ 1DS*■ 8D20 2

DMM 3DNI 4DC2 5

Selection CodeDC3 6D2 9

DINC NCK3M K

DC4MCu 0

Selection CodeD4*■ 1D20 2

DMM 3DNI 4DC2 5

Selection CodeDC3 6D2 9

DINC NCK3M K

DC4MCu 0

Selection Code17-4 S.S.*n 1

316 S.S. SC20H 2

K Monel 500 3Nickel 4

Hast. B. 5

Selection CodeHast. C276 6Ferralium F

Inconel 625 NTriflex 600°F (315°C)

to 800°F (427°C) T▲254 SMO K

Selection CodePTFE/Fiberglass* A

Hast. B/PTFE BC20/PTFE C

Hast. C/PTFE HMonel/PTFE M

Selection CodeInconel/PTFE N

Riload 316SS/PTFE ■ S316 Triflex* Bearing

+ 400°F (204°C) TNickel/PTFE 4

Selection CodePFA/Viton Energizer* VPFA/Inconel Energizer M

UHMWPE UFire Seal PFA/

Inconel ■ Z

Selection CodeInconel Triflex ◆ N

316/Inconel TriFlex SCopper/Inconel

TriFlex C

Selection CodeLocking Lever 2-8 in O

Enclosed Gear 1

Selection CodeLocking Gear 2

Bear Stem 9

Selection CodeTriFlex to 400°F T

TriFlex 400/600°F HTriFlex over 600°F RSingle 1/8 in NPT

Bleed/Inj. Port BTwo 1/8 in NPT

Purge Ports PCL 2 Cleaned CO 2 Cleaned† O

Selection CodeSpec. Cleaning† S

N.A.C.E. Trim NSpecial Non-StandardSpecify Requirement X

None ZSpecial Fasteners F

Inconel 718Bellevilles‡ I

* = Standard PFA Seat - All other materials considered optional.** = 17-7 S.S.Belleville Washers included.† = Customer specification must be given.‡ = For use with Shaft Seals 3 & 4 only (17-7 Bellevilles Standard).■ = Standard Fire Sealed.◆ = Standard TriFlex Seat - All other materials considered optional.▲ = A479 Type XM19 Triflex over 600°F (315°C) Option R