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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 4×18 180 20(17) 22,5
80 280 340 200 160 8×18 220 24 29,125
100 300 400 235 190 8×22 250 24 40,08
150 350 526 300 250 8×26 320 28 96,00
200 400 816 360 310 12×26 500 30 195,00
250 450 850 425 370 12×30 600 32 265,00
40 50 250 300 165 125 4×18 180 20(17) 22,5
64 50 250 325 180 135 4×22 220 26 30,00
80 310 390 215 170 8×22 280 28 47,00
100 350 490 250 200 8×26 320 30 68,70
150 450 600 345 280 8×33 360 36 147,60
200 550 810 415 345 12×36 500 42 205,00
250 650 940 470 400 12×36 630 46 276,00
400 950 1250 670 585 16×42 710 60 940,00
500 1150 1460 800 705 20×48 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