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Gate Valve

Design

NU-TECH cast steel valves are designed and manufactured to provide maximum service life and dependability. All gate valves are full ported and meet the design requirements of American Petroleum Institute standard API600 & API 6D. British standard BS1414 BS EN 1984 and generally, Conform to American Society of Mechanical Engineers standard ASME B1634. Valves are available in a complete range of body/bonnet materials and trims.

Available Modifications Fon NU-Tech Cast Steel Valves

  • Trim Changes
  • End Connection Modifications
  • Packing and Gasket Change
  • Operator Mounting
  • Handwheel Extensions
  • Pressure Equalizing
  • By-Pass
  • Customer Specified Coatings
  • Weld End Bore Changes
  • Oxygen & Chlorine Clearing &
  • Packaging

Operation

Large hand wheels for easy operation. Also available with gearing motor actuators, pneumatic or hydraulic actuators for more difficult services

live Load Packing

In services requiring frequent cycling or with high pressure/temperature variations, live loading extends the service life between maintenance periods by requiring less stments. BelieviU.e springs are employed to provide constant packing gland stress

Wedge

Integral guide rib faces assure self-centering of wedge. flexible wedge gate valve has a one piece. twin-disc wedge, which is designed so that each half flexes independently. Available in solid flex split and his designs.

OS & Y

Outside screw and yoke. Cast steel gate valve yoke integral with bonnet for 150 Lb-B" 600 Lb-6" 900 Lb-4" & small Bolted bonnet, Welding bonnet and pressure seal bonnet in services requiring frequent cycling or with high pressure/tempareture variations.

Ranse of Materiamf

Standard body/bonnet materials include nine grades of carbon, low alloy & stainless steels. For special applications they can be supplied in other grades of alloy & stainless steel. Threre's a full range of trim materials to match any service optional packing & gasket materials are available for a full range of service conditions.

End Connections

A choice of flanged, RTJ flanged or butt welding end for piping flexibility.

Lantern Ring & Double Pacing Set

Lantern ring leak-off fitting connection & double packing stack is optionally available for critical services.

Yoke Sleeve

Extra long thread engagement between yoke sleeve and stem provide long thread life. Valves of sizes Larger than 150 Lb-12", 300 Lb-10", 600 Lb-6", 900 Lb / 1500 Lb / 4" are regularly provided with roll bearing yokes.

Stem

All wedge gate valves are provided with upset forged 1-head stems by forging the T-head. The stem at the stem-wedge connection is strengthened. This design also allows the wedge possibility of a bent stem jamming the wedge.

Body To Bonnet Joint

A flat face gasket joint is used in the 150lb valves. A male and female joint is used in 300Lb to 600Lb valves. Ring joint is 900Lb & higher rated valves.

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Cast Steel Gate Valve 150LB/300LB

Appiicarit Standards

  • Steel Gate Valves API 600/API6D
  • Steel Gate Valves ISO 10434/150 14313
  • Steel Valves Asme B16.34
  • Face To Face ASME B16.10
  • End Flanges ASME B16.5
  • Butt Welding Ends ASME B16.25
  • Inspection And Test API 598/API 6D

Design Descriptions

  • Full Port Design
  • Os & y Out Side Srcew And Yoke
  • Bb. Bolted Bonnet
  • Flexible Wedge, Fully Guided
  • Choice Of Solid Or Split Wedge
  • Renewable Seat Rings
  • Forged T-head Stem
  • Rising Stem And Non-rising Hand Wheel
  • Flanged Or Butt Welding Ends
  • Available With Bg Operator

Materials Of Parts

S. No. Part Name Carbon Steel ASTM Material 1/1/4cr-1/2 mo
1 Body A216-WCb A217-WC6
2 Bonnet A216-WCB A217-W6
3 Wedge A216-WCB+CR13 A2174NC6+HF
4 Stem A182-F6a CR-MO-V
5 Seat ring A105+CR13 A182-F1+HF
6 Stem Backseat A276-420 A276-304
7 Bonnet Gasket Spiral wound (Grapats+304)
a Bonnet Stud A193-67 A193-616
9 Bonnet Stud Nut A194-2H A194-7
10 Packing Graphite
11 Gland A276-420 A276-304
12 Gland Flange A216-WCB A217-WG6
13 Eye Bolt Pin Carbon Steel A276-420
14 Eye Bolt Carbon Steel A193-B7
15 Eye Bolt Nut Carbon Steel A194-2H
16 Grease Frtting Brass + Steel
17 Yoke Sleeve Aluminium - Bronze
18  Yoke Sleeve Jam Nut Carbon Steel
19 Hand Wheel Malleable Iron
20 Hand Wheel Nut Carbon Steel

Dimensional Datas Of Ansi Class 150 LB

NPS 2 2/1/2 3 4 6 8 10 12 14 16 18 20 24 26 28 30 32 36 in
DN 50 65 80 100 150 200 250 300 350 400 450 500 600 650 700 750 800 900 mm
L 7 7.5 8 9 10.5 11.5 13 14 15 16 17 18 20 22 24 24 28 28 in
(RF) 178 191 203 229 267 292 330 356 381 406 432 457 508 559 610 610 711 711 mm
L1 85 9.5 11.12 12 15.88 16.5 18 19.75 22.5 24 26 28 32 34 36 36 38 40 in
(BW) 216 241 283 305 403 419 457 502 572 610 660 711 813 864 914 914 965 1016 mm
H 15.25 17 18.88 23 30.5 37.62 54.5 53.12 59.38 67 74.5 83.5 98.25 110.5 116.5 124 129 146.5 in
(Open) 386 434 480 584 765 956 1149 1350 1508 1703 1892 2119 2500 2806 2960 3150 3280 3720 mm
Do 8 8 10 12 12 14 16 15 20 22 24 26 29 29 32 32 38 40 in
200 200 250 300 300 350 400 450 500 550 600 640 700 720 800 800 950 1000 mm
Wt(kg.) 18 18 32 50 77 121 178 265 463 463 621 792 1521 1521 1838 2261 2490 3310 RF
15 15 26 41 69 108 156 248 424 424 587 752 1570 1570 1900 3310 2540 3380 BW

Dimensional Datas Of Ansi Class 300 LB

NPS 2 2/1/2 3 4 6 8 10 12 14 16 18 20 24 26 28 30 32 36 in
ON 50 65 80 100 150 200 250 300 350 400 450 500 600 650 700 750 800 900 mm
L/L1 8.5 9.5 11.12 12 15.88 16.5 18 19.75 30 33 36 39 45 49 53 55 60 68 in
(RF/BW) 216 241 283 305 403 419 457 602 762 838 914 991 1143 1245 1346 1397 1524 1727 mm
L2 9.12 10.12 11.75 12.62 16.5 17.12 18.62 20.39 30.62 33.62 36.62 39.75 45.88 50 54 56 61.12 69.12 in
(RTJ) 232 257 298 321 419 435 473 518 778 854 930 1010 1165 1270 1372 1422 1553 1756 mm
H 16.12 17.88 20 24 31.75 39.38 47.62 55.75 62.25 67.88 77.12 86.38 102 117 122 126 130 152 in
(Open) 410 453 509 612 805 1000 1210 1415 1580 1725 1960 2195 2590 2975 3100 3200 3300 3860 mm
Do 8 8 10 12 14 16 18 20 25 22 24 26 29 29 32 32 38 40 in
200 200 250 300 350 400 450 500 550 550 600 640 720 720 800 800 950 1000 mm
Mk) 23 35 50 71 144 209 322 482 683 950 1145 1635 2660 3090 3310 3595 3720 3985 RF
17 26 39 53 113 164 256 390 565 805 965 1410 2305 2540 2725 3055 3360 3630 BW
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Cast Steel Gate Valve 600 LB /900 LB

Appucalle Standards

  • Steel Gate Valves API 600/API6D
  • Steel Gate Valves ISO 10434/150 14313
  • Steel Valves Asme B16.34
  • Face To Face ASME B16.10
  • End Flanges ASME B16.5
  • Butt Welding Ends ASME B16.25
  • Inspection And Test API 598/API 6D

Design Descriptions

  • Full Port Design
  • 0s4 Out Side Srcew And Yoke
  • Bb. Bolted Bonnet
  • Flexible Wedge, Fully Guided
  • Choice Of Solid Or Split Wedge
  • Renewable Seat Rings
  • Forged T-head Stem
  • Rising Stem And Non-rising Hand Wheel
  • Flanged Or Butt Welding Ends
  • Available With Bg Operator

Materials Of Parts

S. No. Part Name Carbon Steel ASTM Material 1/1/4cr-1/2 mo
1 Body A216-WCb A217-WC6
2 Bonnet A216-WCB A21 7-W6
3 Wedge A216-WCB+CR13 A217-WC6+HF
4 Stem A182-F6a CR-MO-V
5 Seat ring Al 05+CR13 A182-F1+HF
6 Stem Backseat A276-420  A276-304
7 Bonnet Gasket Spiral wound (Graphtle+304)
8 Bonnet Stud A193-87 A193-B16
9 Bonnet Stud Nut A194-2H A194-7
10 Packing Graphite
11 Gland A276-420 A276-304
12 Gland Flange A216-WCB A217-WC6
13 Eye Bolt Pin Carbon Steel A276-420
14 Eye BoR Carbon Steel A193-87
15 Eye Boll Nut Carbon Steel A194-2H
16 Grease Fitting Brass + Steel
17 Yoke Sleeve Aluminium - Bronze
18 Yoke Sleeve Jam Nut Carbon Steel
19 Hand Wheel Malleable Iron
20 Hand Wheel Nut Carbon Steel

Dimensional Datas Of Ansi Class 600 LB

NPS 2 2/1/2002 3 4 6 8 10 12 14 16 18 20 24 26 28 30 32 36 in
ON 50 65 80 100 150 200 250 300 350 400 450 500 600 650 700 750 800 900 MM
L/L1 11.5 13 14 17 22 26 31 33 35 39 43 47 55 57 61 65 70 82 in
(RF/BW) 292 330 359 432 559 660 787 838 889 991 1092 1194 1397 14.48 1549 1651 1778 2083 mm
L2 11.62 13.12 14.12 17.12 22.12 26.12 31.12 33.12 35.12 39.12 43.12 47.25 55.38 57.5 61.5 65.5 70.62 82.62 in
(RTJ) 295 333 359 435 562 664 791 841 892 994 1095 1200 1407 1461 1562 1644 1794 2099 mm
H 16.5 18.75 20.38 25.5 33 40.38 48.38 57 62 70.62 76 87 101.5 105 109.5 140 124 140 in
(Open) 418 476 518 646 840 1025 12.3 1450 1575 1795 1930 2210 2580 2665 2780 2895 3150 3560 rnal
Do 8 10 10 12 18 20 24 24 24 24 26 26 29 29 32 32 38 40 in
200 250 250 300 450 500 600 600 600 600 640 640 720 720 800 800 950 1000 mm
Wt(kg.) 36 52 67 112 170 393 610 890 1245 1530 1945 2450 2995 3475 3725 4045 4185 4480 RF
29 42 53 83 125 310 472 730 1055 1240 1625 2030 2590 2855 3065 3440 3780 4085 BW

Dimensional Datas Of Ansi Class 900 LB

N PS 2 2/1/2 3 4 6 8 10 12 14 16 18 20 24 in
DN 50 65 80 100 150 200 250 300 350 400 450 500 600 mm
L/L1 14.5 16.5 15 18 24 29 33 38 40.5 44.5 48 52 61 in
(RF/BW) 368 419 381 457 610 737 838 737 1029 1130 1219 1321 1549 mm
L2 14.62 16.62 15.12 18.12 24.12 29.12 33.12 38.12 40.88 44.88 48.5 52.5 61.75 in
(RTJ) 371 422 384 460 613 740 841 968 1038 1140 1232 1334 1568 mm
H 19.62 21.5 22.5 26.62 35.5 4.5 53 60 74.88 81 87 101 104 in
(Open) 498 547 573 678 900 1103 1345 15.25 1900 2055 2215 2565 264 mm
Do 10 10 12 18 20 24 26 29 32 32 38 38 40 in
250 250 300 450 500 600 640 720 800 800 950 950 100 mm
Wt(kg.) 74 131 101 172 335 640 1100 1600 2250 2850 3060 3935 49 RF
54 105 78 135 260 515 920 1380 2010 2565 3485 3250 4065 BW
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Cast Steel Gate Valve 1500 LB /2500 LB

Design Descriptions

  • Steel Gate Valves API 600/API6D
  • Steel Gate Valves ISO 10434/150 14313
  • Steel Valves Asme B16.34
  • Face To Face ASME B16.10
  • End Ranges ASME B16.5
  • Butt Welding Ends ASME B16.25
  • Inspection And Test API 598/API 6D

Applicable Standards

  • Full Port Design
  • Os&y Out Side Srcew And Yoke
  • BB. Bolted Bonnet
  • Flexible Wedge, Fully Guided
  • Choice Of Solid Or Split Wedge
  • Renewable Seat Rings
  • Forged 1-head Stem
  • Rising Stem And Non-rising Hand Wheel
  • Flanged Or Butt Welding Ends
  • Available With Bg Operator

Materials Of Parts

S. No. Part Name Carbon Steel ASTM Material 1/1/4cr-1/2 mo
1 Body A216-WCB A217-W06
2 Yoke A216-WCB A217-WC6
3 Wedge A216-WCB+HF A217-WC6+HF
4 Stem A182-F6a CR-MO-V
5 Seat ring A105+HF A182-F11+HF
6 Bonnet A105 A182-F11
7 Bonnet Gasket Steel Ring 3045S ring
8 Adapter ring Carbon Steel A-276-420
9 Retainer Carbon Steel A-276-420
10 Yoke Cap Carbon Steel Alloy Steel
11 Bonnet Stud A193-B7 A193-B16
12 Bonnet Stud Nut A194-2H A194-7
13 Packing Graphite
14 Gland A276-420 A276-304
15 Gland Flange A216-WCB A217-WC6
16 Eye Bolt Pin Carbon Steel 4276-420
17 Eye Belt Carbon Steel A193-B7
18 Eye Bolt Net Carbon Steel A194-2H
19 Grease Fitting Brass + Steel
20 Yoke Sleeve Aluminium-Bronze
21 Yoke Sleeve Jam Nut  Carbon Steel
22 Hand Wheel Malleable Iron
23 Hand Wheel Nut Carbon Steel

Dimensional Datas Of Ansi Class 150 LB

NPS 2 2/1/2 3 4 6 8 10 12 14 16 18 20 24 in
DN 50 65 80 100 150 200 250 300 350 400 450 500 600 mm
L/L1 14.5 16.5 18.5 21.5 27.75 32.75 39 44.5 49.5 54.5 60.5 65.5 76.5 in
(RF/BW) 368 419 470 546 705 832 991 1130 1257 1384 1537 1664 19.43 mm
L2 15.5 16.62 18.62 21.62 28 33.12 39.38 45.12 50.25 55.38 61.38 66.37 76.62 in
(RTJ) 371 422 473 549 711 841 1000 1146 1276 1407 1559 1686 1972 mm
H 24.25 26 30 34.12 39.5 45 54 61 74.88 80.5 93.75 101.5 114.75 in
(Open) 615 658 760 868 1005 1145 1370 1 550 1900 2050 2380 2580 2915 mm
Do 10 12 18 20 24 18 18 24 24 24 24 24 24 in
Wt(kg.) 250 300 450 500 600 460 460 600 600 600 600 600 600 mm
116 166 209 296 510 920 1910 3145 4100 6200 8965 13100 15860 RF
105 150 188 265 420 760 1640 2755 3200 5300 8070 11790 14275 BW

Dimensional Datas Of Ansi Class 300 LB

NPS 2 2/1/2  3 4 6 8 10 12 14 16 18 20 24 in
DN 50 65 80 100 150 200 250 300 350 400 450 500 600 mm
L/L1 17.5 20 22.75 26.5 36 40.25 50 56 in
(RF/BW) 451 508 578 673 914 1022 1270 1422 mm
L2 17.88 20.5 23 26.88 36.5 40.88 50.88 56.88 in
(RTJ) 454 514 584 584 683 927 1038 1292 1445 mm
H 24.88 29 35 41.5 57 63.37 81.75 89.75 in
(Open) 631 736 890 1055 1450 1610 2075 2280 mm
Do 12 18 20 20 24 24 24 24 in
Wt(kg.) 300 450 500 500 600 600 600 600 mm
155 210 310 580 1 600 2450 4570 7150 RF
124 160 245 460 1310 2010 3800 6000 BW
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