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Flexible Wedge Gate Valves, Rising Stem

Destination:

This valves are used as industrial fittings within low pressure installations up to 25 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 17%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 subassy
9. Stud bolt IC45/SR EN10083
10. Nut IC45/SR EN10083

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
25 200 400 1000 360 310 12×26 600 30 175
250 450 1173 425 370 12×30 600 32 290

Working and constructive characteristics

About constructive features, the product is designed in accordance with DIN 3352:

  • construction length: DIN 3202-F5 (PN 25);
  • connecting flanges: DIN 2501, part 1;
  • sealing surfaces: DIN 2526, “C” type;
  • sealing: 17% Cr/ 17% Cr;
  • body: straight with flanges;
  • closing element: flexible wedge gate;
  • actuating stem: rising, with thread;
  • mounting position: indifferent;
  • closing achieved by means of handwheel.

Working and testing regime

Nominal pressure, bar Temperature,°C Testing pressure, bar
120 200 250 Strength Tightness
Max. working pressure, bar
25 25 22 20 38 28