SWZ type/ API Flexible Wedge Gate Valve

API Wedge GATE VALVE Sangong Flow Control Co.,Limited

www.sangongvalve.com [email protected]

SWZ type/ API Flexible Wedge Gate Valve

Standard and Scope:

Size: NPS 1/2"～48"

Pressure Rating: Class 150～2500

Connection: RF, BW, RTJ, SW and so on

Material: Carbon steel, Stainless steel, Alloy and so on

Design and Manufacture: API 600(Cast steel, ISO10434), JIS B2073-2083, API603 (cast

stainless steel),

Test and Inspection: API600, API598,

Pressure-temperature ratings: ASME B16.34.

Face-to-Face: ASME B16.10,

End Connection: ASME B16. 5（for NPS≤24）; ASME B16.47 series B, API 605 or

ASME B16.47 series A, MSS SP-44（for NPS＞24）

BW End connection: ASME B16.25

Design feature

Design of Disc, solid wedge or flexible wedge

Gate Valves with NPS ≥ 2 are usually of flexible wedge gate for better seal performance

and cost reason; Gate valves with NPS < 2 are of solid wedge gate, Gate Valve with high

pressure and big size can also be solid wedge if required.

Stem(shaft) type, Rising or Non-rising, integral forged steel, quenched and

tempered with surface nitriding Treament

Gate valves are characterized as having either a rising (outside screw and yoke) or a

non-rising stem if required. Rising stems provide a visual indication of valve position but

require bigger installation space. Non-rising stems gate valve are used where vertical

space is limited or underground.

The stem is integral forged design, welding fabricated is not allowed. Stem and disc is

connected in “T” type, The strength of the connecting area is higher than that of the T

threaded part of the stem. Min diameter of shaft should be as per relevant standard to

keep enough strength

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The shaft is quenched and tempered, and its surface is treated by nitriding treatment,

thus it has good corrosion resistant and friction resistant.

Shaft Nut

Usually, the shaft nut is made of copper alloy or ASTM A439 D2. For large sized gate

valves (NPS 10 for Class 150, NPS 8 for Class 300, NPS 6 for Class 600, NPS 5 for

Class 900), a roller bearing is fitted underside of the stem nut in order to minimize the

opening and closing torque of the gate valve.

Body and Bonnet Connection, studs and nuts or pressure seal

The body and bonnet of Class150～Class900 wedge gate valves are usually connected

with studs and nuts. And the body and bonnet of Class1500～Class2500 gate valves are

usually of pressure seal design. But if required, pressure seal can be also available for

class600 or class900.

Gasket of Cover Flange

Usually Flexible graphite + Carbon steel or stainless steel combined gasket is used for

Class150 gate valve; Flexible graphite +Stainless steel wounded gasket is used for Class

300 gate valve; Flexible graphite +Stainless steel wounded gasket is used for Class600

gate valve, and ring joint gasket is also optional for Class600 gate valve; Ring Joint

gasket is used for Class 900 gate valve; Pressurized seal design is used for

Class1500 ～Class2500 gate valve.

Seat

For carbon steel gate valve, the seat is usually forged steel. The sealing surface of the

seat is spray welded with hard alloy specified by the customer. Renewable threaded seat

is used for NPS ≤ 10 gate valves, and welded on seat can be also optional if being

requested by the customer. Welded on seat is used for NPS ≤10 carbon steel gate valves.

For Stainless steel gate valve, integral seat is usually adopted, or to weld hard alloy

directly integrally. Threaded or welded on seat is also optional for stainless steel gate

valve if being requested by the customer.

Back Seat

All Sangong Gate valves have a back seating design. In most cases, the carbon steel

gate valve is fitted with a renewable back seat while for stainless steel gate valve; the

back seat is machined directly in the bonnet or is machined after welding. When the gate

valve is at fully open position, the sealing of the back seat is very reliable. However, as

per API 600, the packing shall not be added or changed by the mean of back seating

when the valve is Pressure containing.

Packing Seal

Molded flexible graphite is used for packing material. PTFE or combined packing material

can be also used if required. The internal surface of the stuffing box, of which area is

contacted with the packing, is of excellent finish (Ra3.2μm). The shaft surface, contacting





with the packing, should be rolled and pressed after being precisely machined, so as to

reach to the high finish and compactness (Ra0.8μm) and ensure the reliable tightness of

the stem area.

Operation

Hand wheel, gearbox, chain wheel, impact wheel, bare shaft with top flange( ISO 5211),

electric, pneumatic actuator

Other Special Gate Valve

Extension Stem Gate Valve, Cryogenic Gate Valve, Jacketed Gate Valve, Bellow

Sealed Gate Valve, Gate Valve with bypass, Pressure seal Gate Valve

Major Parts Chart – API600 Standard

Parts

No.

Part Name Materials

WCB/Trim1 WCB/Trim5 WCB/Trim8 CF8/304 CF8M/316

1 Body ASTM A216 WCB ASTM A216 WCB ASTM A216 WCB ASTM A351 CF8 ASTM A351 CF8M

2 Gasket Graphite+CS or Graphite+SS

Graphite+SS304 Graphite+SS316L

3 Seat Ring A105+13Cr A105+STL A105+STL INT INT

4 Disc A216 WCB+13Cr A216 WCB+STL A216 WCB+13Cr ASTM A351 CF8 ASTM A351 CF8M

5 Stem ASTM A182 F6a ASTM A182 F6a ASTM A182 F6a ASTM A182 F304 ASTM A182 F316

6 Backseat Bushing ASTM A182 F6a ASTM A182 F6a ASTM A182 F6a INT INT

7 Packing Graphite(braided graphite,die-formed graphite,PTFE)

8 Gland ASTM A182 F6a ASTM A182 F6a ASTM A182 F6a ASTM A182 F304 ASTM A182 F316

9 Gland Eyebolt ASTM A193 B7 ASTM A193 B7 ASTM A193 B7 ASTM A193 B8 ASTM A193 B8M

10 Eyebolt Nut ASTM A194 2H ASTM A194 2H ASTM A194 2H ASTM A194 8 ASTM A194 8M

11 Eyebolt Pin ASTM A36 ASTM A36 ASTM A36 SS SS

12 Gland Flange ASTM A216 WCB ASTM A216 WCB ASTM A216 WCB ASTM A351 CF8 ASTM A351 CF8M

13 Bonnet Bolt ASTM A193 B7 ASTM A193 B7 ASTM A193 B7 ASTM A193 B8 ASTM A193 B8M

14 Bonnet Nut ASTM A194 2H ASTM A194 2H ASTM A194 2H ASTM A194 8 ASTM A194 8M

15 Bonnet ASTM A216 WCB ASTM A216 WCB ASTM A216 WCB ASTM A351 CF8 ASTM A351 CF8M

16 Nipple Carbon steel

17 Stem Nut ASTM A439 D2

18 Yoke Sleeve Nut Carbon steel

19 Hand Wheel Ductile Iron

20 Hand Wheel Nut Carbon steel

21 Set Screw ASTM A193 B7

Note: The charts above just only list common combination of gate valve. SGV able to offer other material if required.





Class 150 JIS10K Flexible Wedge Gate Valve

Class Norminal Size F-t-F Dimension(mm) Dimension(mm) Weight(kg)

NPS DN RF-L RTJ-L BW-L d H H1 W W1 H.W G.O

1/2 15 108 119 108 14 218 120 4

3/4 20 117 130 117 19 190 120 5

1 25 127 140 127 25 256 140 7

1 1/4 32 140 153 140 31 268 180 10

1 1/2 40 165 178 165 38 326 200 15

2 50 178 191 216 30 340 200 20

2 1/2 65 191 203 241 63 365 200 23

3 80 203 216 283 76 410 250 36

4 100 229 241 305 100 485 280 54

5 125 254 267 381 127 520 280 62

6 150 267 279 403 150 595 795 300 310 82 104

8 200 292 305 419 200 755 1015 360 310 136 150

150lb 10 250 330 343 457 250 895 1210 400 310 196 215

10k 12 300 356 394 502 300 1040 1405 450 460 299 315

14 350 381 419 572 336 1145 1535 500 460 381 451

16 400 406 445 610 387 1333 1780 500 460 536 597

18 450 432 470 660 438 1420 1900 600 460 608 651

20 500 457 521 711 488 1635 2220 700 530 827 863

24 600 508 813 590 1862 2557 800 530 1202 1357

26 700 559 864 633 2680 530 1281 1550

28 750 610 914 684 2890 530 1880

30 800 610 914 735 31110 600 2300

32 850 711 965 779 3280 600 2550

34 900 711 1016 830 3500 600 2950

36 950 1016 874 3640 600 3390

40 1000 812.8 1067 4200 1000 3042

48 1200 1068 1168 5020 1000 5520





Class 300 JIS20K Flexible Wedge Gate Valve



1/2 15 140 151 140 14 198 120 6

3/4 20 152 165 152 19 215 140 7

1 25 165 178 165 25 220 160 8.5

1 1/4 32 178 191 178 31 306 180 15

1 1/2 40 190 203 190 38 342 200 18

2 50 216 232 216 50 364 200 26

2 1/2 65 241 257 241 63 385 200 36

3 80 283 298 283 76 460 250 55

4 100 305 321 305 100 540 650 280 310 67 100

5 125 381 397 381 127 548 750 300 310 99 126

6 150 403 419 403 150 649 835 350 310 147 186

8 200 419 435 419 200 798 1030 400 310 228 235

300lb 10 250 457 473 457 250 940 1255 450 460 332 416

20k 12 300 502 518 502 300 1129 1460 500 460 512 502

14 350 762 778 762 336 1195 1585 600 460 715 756

16 400 838 854 838 387 1340 1830 500 460 850 965

18 450 914 930 914 431 1503 2000 650 460 1100 1224

20 500 991 1010 1143 482 1625 2175 750 530 1300 1400

24 600 1143 1165 1245 584 1965 2620 900 530 2200 2385

26 700 1245 1270 1346 633 2850 600 3000

28 750 1346 1372 1397 684 3080 600 3300

30 800 1397 1422 1524 735 3180 600 3550

32 850 1524 1553 1626 779 3300 600 4400

34 900 1626 1654 1727 830 3550 600 5200

36 950 1727 1756 874 3760 600 6050

40 1000 1956 4340 1000 8100





Class 600 Class 900 Flexible Wedge Gate Valve



2 50 292 295 292 50 380 200 37

2 1/2 65 330 333 330 63 420 250 50

3 80 356 359 356 76 500 585 280 310 82 87

4 100 432 435 432 100 575 695 300 310 142 134

5 125 508 511 508 127 700 790 350 310 175 227

6 150 559 562 559 150 750 900 450 460 245 286

8 200 660 664 660 199 850 1110 500 460 423 472

600lb 10 250 787 791 787 247 1005 1300 650 460 682 657

12 300 838 841 838 298 1130 1650 700 460 932 893

14 350 889 892 889 326 1270 1750 900 530 1177 1318

16 400 991 994 991 374 1365 1900 900 530 1513 1720

18 450 1092 1095 1092 419 2020 600 1980

20 500 1194 1200 1194 463 2172 600 2460

24 600 1397 1407 1397 558 2650 600 3650

2 50 368 371 368 47 500 280 70

2 1/2 65 419 422 419 57 450 280 110

3 80 381 384 381 72 505 300 310 140 167

4 100 457 460 457 98 575 625 350 310 178 227

5 125 559 562 559 125 630 740 400 310 258 285

900lb 6 150 610 613 610 146 795 900 500 460 358 396

8 200 737 740 737 190 885 1000 650 460 550 627

10 250 838 841 838 238 1035 1130 700 530 1000 1100

12 300 1029 968 965 282 1180 1520 900 530 1215 1310

14 350 1130 1038 1029 311 1350 1600 900 530 1600 1665

16 400 1219 1140 1130 355 1890 2100 900 600 2150 2330

18 450 1321 400 2232 800 3000

20 500 444 2435 800 3800





Class 1500 Class 2500 Flexible Wedge Gate Valve

Class Norminal Size F-t-F

Dimension(m

m)

Dimension(m

m)

Weight(kg)


2 50 368 371 368 47 430 280 70

2 1/2 65 419 422 419 57 490 300 110

3 80 470 473 470 69 540 680 350 310 175 202

4 100 546 549 546 92 650 810 400 310 270 300

5 125 673 676 673 125 780 920 450 310 378 405

6 150 705 711 705 136 835 1035 500 460 520 575

8 200 832 841 832 177 925 1180 750 530 820 915

1500lb 10 250 991 1000 991 222 1230 1525 900 600 1560 1750

12 300 1130 1146 1130 263 1620 600 2120

14 350 1257 1276 1257 288 1905 600 3306

16 400 1384 1407 1384 330 2050 600 3450

2 50 451 454 451 38 490 580 280 310 100 130

2 1/2 65 508 514 508 47 580 630 300 310 150 180

3 80 578 584 578 57 630 765 350 310 245 275

4 100 673 683 673 72 725 850 400 310 390 420

5 125 794 807 794 96 900 960 500 460 550 580

2500lb 6 150 914 927 914 111 1040 1100 600 530 780 835

8 200 1022 1038 1022 146 1150 1150 750 460 1260 1355

10 250 1270 1292 1270 184 1400 1460 900 600 2380 2565

12 300 1422 1445 1422 218 1660 600 3250

NOTE: The material in this catalog is for general information. For specific performance data, proper material selection

and special design, consult us freely. Although every attempt has been made to ensure correct information, Sangong

reserves the right to change designs, materials or specifications without notice.



SWZ type/ API Flexible Wedge Gate Valve

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