1/2 –12” (15–300 mm)ASME CLASS 150–300

In full compliance withASME/ANSI B16.34, BS 5351, ISO 5211, API 607/4, API 598, TA-LUFT

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2

VELAN MEMORY SEAL BALL VALVE TECHNOLOGY

BEFORE ASSEMBLY AFTER ASSEMBLY

Velan concave-convexflexible, “in-tension” seats

with induced sealing memoryU. S. PATENT 3,384,341

AREA IN COMPRESSION

AREA IN-TENSION

D1 D2

SEALING MEMORYThe Velan sealing memory is induced into the seatsduring the assembly process. When the ball isinserted into the valve body during assembly, itpartially flattens the seat, creating a tensile stress inthe center of the seat. As a result, the seat core increases in diameter fromD1 to D2 and like a stretched elastic band pushesagainst the ball. This ensures reliable sealing evenat vacuum or low pressures.

SEAT STRENGTHA seat in tension is stronger than a seat incompression because the tensile strength of PTFE intension is 3600 psi versus only 1800 psi for PTFE in compression. Greater strength means less fatigue,superior sealing ability and longer cycle life.

CAVITY PRESSURE RELIEFMemory seal seats are designed to relieveoverpressure in the ball/body cavity. This capabilityis influenced by many variables including: fluidcharacteristics, variations in pressure, seatmaterials, seat compression, temperature andthermal cycles.

Positive release of cavity overpressure to theupstream side is assured in bypassing the upstreamseat through a drilled hole in the ball. This option ispreferred in certain services such as liquid chlorine.

Pressure relief when the valve is in the openposition is always through the vent in the top of theball adjacent to the stem connection.

For further information on Cavity Relief contact Velan.

SUMMARY OF MEMORYSEAL BENEFITS

● SEATS ”IN-TENSION“

- Greater strength

- Less fatigue

- Positive bi-directional shutoff

- Compensate for temperature fluctuations

- Uniform torque

- High cycle life

- Eliminate cold flow effects

● LARGER SEATING AREA

- Superior sealing

LOWER TORQUESVelan “in-tension” seats produce more uniformtorque because the seat deflects into the cavitybehind it to accommodate slight differences inmachining tolerances or the normal expansion ofPTFE as temperature increases. PTFE expandsapproximately seven times as much as metal.

In order to achieve the required stempacking capability and performancewithin the limited space in thesesmaller valves, an impressive andunique 3-way sealing system has been developed. This 3-way sealingsystem provides the following:a) Live-loaded cup and cone PTFE seal.b) Primary PTFE seal.c) Independently loaded fire safe

graphite packing.

Adjustable packing gland

PTFE thrust washer

Anti-extrusion rings(3 places)

Fire safe graphite packing,SEAL-3Live loading with one spring washer

PTFE main stem sealSEAL-2Static grounding

PTFE thrust washer/stem seal SEAL-1

3

A UNIQUE HIGH INTEGRITY STEM SEAL WITH ISO ACTUATOR MOUNTING

EXCLUSIVE DESIGN FEATURES

3-WAY SEAL (1/2–11/2")

Upper stem bearing

Fire safe

graphite packing

SEAL-3

Live-loading with

2 Belleville washers

Lower stem bearing

PTFE thrust washer/

stem seal

SEAL-1

• Low emission stem sealA unique 4-way seal assures low emissions with TA-LUFT Accreditation (less than 1 ppm allowance).The first seal is on the stem shoulder. Next, the maincup and cone PTFE seal, precompressed (3000 psi) isself-adjusting under live-loading with two springwashers. A third seal, fire-safe graphite packing, isindependently loaded and remains unaffected by theburnout of the main packing during fire. Finally, twoO-ring seals provide additional seal performance. Themain stem seal does not require adjustment orattention. A flanged 2-piece gland design providesadditional reliability.

• Fully guided stemLower and upper bearings prevent stem wobblingand leakage due to side thrust on stem.

• Anti-static designBall-spring devices eliminate static electrical build upbetween stem, ball and body.

• Blowout-proof stemThe internally assembled and back seated stemprovides blowout-proof safety.

• Fire tested The valves are designed, tested andcertified to meet the requirements of API 6FA, API 607 Rev. 4 and BS6755 part 2.

Adjustable packing flange

O-rings

SEAL-4

Guided ISO

mounting pad

Anti-extrusion rings

(4 places)

PTFE packing with

TA-LUFT accreditation

SEAL-2

Ball-to-stem and

stem-to-body static

grounding as standard

to BS 5351

4-WAY SEAL (2–12")

4

UB-150/300 UNIBODY REGULAR PORT FLANGED MEMORY SEAL BALL VALVESCAST CARBON OR STAINLESS STEEL, 1⁄2 –12" (15–300 mm)

COMPLETE WITH ISO MOUNTING PAD, BRACKET,

DRIVER AND ACTUATOR

DESIGN FEATURES:● Single piece body

The Unibody memory seal ball valves have asingle body with lower weight, higher strength,eliminating the possible body-body end leak pathon split-body design. Sleeve threads areprotected by a PTFE seal.

● Memory-seal seats (U.S. Patent 3,384,341)The seats compensate automatically for wear andpressure-temperature fluctuations with uniqueperformance even at very low line pressure. (See Page 2 for details).

● Unique 0-leakage stem seal

The stem seal meets API 598 and the moststringent emission requirements such as TA-LUFTwith less than 1 ppm leak rate. (See page 3 for more details).

● Meets worldwide technical specifications

Design BS5351, API 608, ASME/ANSI B16.34, faceto face ANSI B16.10, fire testing BS6755 part 2, API 607 Rev. 4, API 6FA, performance testingBS6755 API 598 and ISO for all parameters ofstandardized valve automation.

● Standard corrosion resistant trim

Stainless steel ball and stem on all stainless steeland carbon steel valves.

● Special applications (see pages 10-11).● Highest standards of quality

Velan has earned over its 50 years of productionactivities a worldwide reputation for quality indesign, manufacturing and valve performance.

APPLICATIONS:

These rugged, versatile, high performance ballvalves meet requirements for oil and gas pipelineservice and meet NACE specification MR01.75 for sour gas.

The valves can handle a vast variety of fluids,slurries, semi-solids and almost any corrosiveservice in chemical, oil, petrochemical, gas, pulp,paper processing and other industries.

09 05 19 71

07

11

12

17

13A

36

13B

17

74

63

56

57 33

04

07

06

05B, 4601

5

a

ITEM DESCRIPTION01 Body04 Stem05 Ball

05B 316 SS grounding ball06 Thrust washer07 Stem bushings09 Seats11 Packing flange12 Gland bushing

13A Packing ring (graphite)13B Packing rings (PTFE)17 Socket head cap screws19 Body gasket33 Handle36 Belleville washers46 302 SS grounding spring56 Hex head bolt57 Flat washers63 Packing washers71 Seat retainer sleeve74 O-ring

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DIMENSIONS, WEIGHTS, Cv, RATING & TORQUES

3,390

2,260

1,1301,017904791

678

565

452

339

226

113

102

90

79

68

56

45

34

23

1110

8

6

3

MA

XIM

UM

TO

RQ

UE

- N

m

PRESSURE BAR10.3 20.7 31.0 41.4 51.7

UB-150 WEIGHT ISO Mtg.

A B C D E F H Cvlbkg Flange

5.90 3.24 2.12 4.25 0.50 3.50 0.50 9 3.3 F03150 82 54 108 13 89 13 1.55.90 3.39 2.31 4.62 0.62 3.88 0.75 15 4.3 F03150 86 59 117 16 99 19 2.07.80 4.07 2.50 5.00 0.81 4.25 1.00 42 6.5 F04198 103 64 127 20 108 25 3.07.80 4.77 3.25 6.50 1.25 5.00 1.50 125 10.4 F05198 121 83 165 32 127 38 4.79.00 4.81 3.72 7.00 1.50 6.00 2.00 165 20.6 F07228.6 122.1 94.4 177.8 38.1 152.4 50.8 9.311.90 6.03 4.00 8.00 2.38 7.50 3.00 350 37.4 F07302.3 153.2 101.6 203.2 60.5 190.5 76.2 16.820.00 7.98 4.50 9.00 3.00 9.00 4.00 540 65.1 F10508.0 202.7 114.3 228.6 76.2 228.6 101.6 29.325.88 11.60 5.25 10.50 4.38 11.00 6.00 1000 116.0 F12657.4 294.6 133.4 266.7 111.3 279.4 152.4 52.325.88 13.57 5.75 11.50 5.67 13.50 8.00 1770 193.0 F14657.4 344.7 146.1 292.1 144.0 342.9 203.2 86.9

– 13.64 146.1 13.00 7.36 16.00 10.00 2850 311.0 F16346.5 165.1 330.2 186.9 406.4 254.0 140.1

– 15.04 7.00 14.00 8.98 19.00 12.00 4800 482.0 F16382.0 177.8 355.6 228.1 482.6 304.8 217.1

SIZEin

mm1⁄2153⁄42012511⁄2402503804

1006

1508

2001025012300

UB-300 WEIGHT ISO Mtg.

A B C D E F H Cvlbkg Flange

5.90 3.24 3.38 5.50 0.50 3.75 0.50 9 4.1 F03150 82 86 140 13 95 13 1.95.90 3.39 3.69 6.00 0.62 4.62 0.75 15 6.6 F03150 86 94 152 16 117 19 3.07.80 4.07 4.00 6.50 0.81 4.88 1.00 42 8.9 F04198 103 102 165 20 124 25 4.07.80 4.77 4.25 7.50 1.25 6.12 1.50 125 15.9 F05198 121 108 191 32 156 38 7.29.00 4.81 4.62 8.50 1.50 6.50 2.00 165 25.3 F07228.6 122.1 117.3 215.9 38.1 165.1 50.8 11.411.90 6.03 6.63 11.12 2.38 8.25 3.00 350 54.5 F07302.3 153.2 168.4 282.6 60.5 209.6 76.2 24.520.00 7.98 6.00 12.00 3.00 10.00 4.00 540 95.1 F10508.0 202.7 152.4 304.8 76.2 254.0 101.6 42.825.88 11.60 8.63 15.88 4.38 12.50 6.00 1000 184.8 F12657.4 294.6 219.2 403.2 111.3 317.5 152.4 83.225.88 13.57 8.25 16.50 5.67 15.00 8.00 1770 296.6 F14657.4 344.7 146.1 419.1 144.0 381.0 203.2 133.6

(1) 13.64 9.00 18.00 7.36 17.50 10.00 2850 471.5 F16346.5 228.6 457.2 186.9 444.5 254.0 212.4

(1) 15.04 9.88 19.75 8.98 20.50 12.00 4800 729.4 F16382.0 251.0 501.6 228.1 520.7 304.8 333.1

SIZEin

mm1⁄2153⁄42012511⁄2402503804

1006

1508

2001025012300

DIMENSIONS, WEIGHTS, Cv & ISO FLANGES

(1) Gear actuated.