Valves and Chokes | Flexible Wedge Gate Valves, Nonrising Stem

Flexible Wedge Gate Valves, Nonrising Stem
Destination:

This valves are used as industrial fittings within pressure installations, between 25 - 64 bar.
Working medium: water, steam, gases, petroleum products and other similar fluids, with low corrosion, exclusive hydrogen, mixtures of hydrogen, as well as aggressive mediums with sulphur or sulphuretted hydrogen.
Working temperature: -10 ÷ 225oC

Contents:

1. Body OTA20/STAS 9277
2. Sealing ring 13%Cr
3. Seat OTA20 / STAS 9277
4. Stem 13%Cr
5. Gasket Marsit MU 275-500
6. Cover OTA20 / STAS 9277
7. Gasket nonasbest
8. Handwheel OTA20 / STAS 9277
9. Stud bolt Gr.5.8.
10. Nut Gr.5

Technical and constructive characteristics

PN
bar
DN
mm
L
mm
H
mm
d1
mm
d2
mm
n x d3 D
mm
b
mm
Net weight
25 50 250 300 165 125 4x18 180 20(17) 22,5
80 280 340 200 160 8x18 220 24 29,125
100 300 400 235 190 8x22 250 24 40,08
150 350 526 300 250 8x26 320 28 96,00
200 400 816 360 310 12x26 500 30 195,00
250 450 850 425 370 12x30 600 32 265,00
40 50 250 300 165 125 4x18 180 20(17) 22,5
64 50 250 325 180 135 4x22 220 26 30,00
80 310 390 215 170 8x22 280 28 47,00
100 350 490 250 200 8x26 320 30 68,70
150 450 600 345 280 8x33 360 36 147,60
200 550 810 415 345 12x36 500 42 205,00
250 650 940 470 400 12x36 630 46 276,00
400 950 1250 670 585 16x42 710 60 940,00
500 1150 1460 800 705 20x48 1000 68(62) 1430


Working and constructive characteristics

About constructive features, the product is designed in accordance with DIN 3352:
  • construction length:
    • DIN 3202-F5 (PN 25);
    • DIN 3202-F7 (PN 40 and 64);
  • connecting flanges: DIN 2501, part 1;
  • sealing surfaces: DIN 2526, "C" type;
  • sealing: 13% Cr/13% Cr;
  • body: straight with flanges;
  • closing element: flexible wedge gate;
  • actuating stem: nonrising, with thread;
  • mounting position: indifferent;
  • closing achieved by means of handwheel.

Working and testing regime

Nominal pressure
bar
Temperature
°C
Testing pressure
bar
120° 150° Strength Tightness
Max. working pressure, bar
25 25 20 38 28
40 40 35 60 44
64 64 50 96 70
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