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Home > Electrical
Equipment > Pipeline fittings
Valves
Back pressure, rotary, single-disk, cast-iron flangeless valves
are designed to be installed on either horizontal or vertical pipelines for automatic
blocking of the medium's reverse flow. The operating position of the valves on
the horizontal pipeline is cover upwards; that of the vertical pipeline - as shown
by the case's upward arrow. The medium flow's direction must be under the clack
valve disk (as shown by the arrow on the case).
These valves are available
in two variants:
- 20L steel;
- 12H18N9TL steel.
Valve sealing - corrosion-resistant
steel.
The 20L-steel valves are available in climatic embodiment U1; those
made of 12H18N9TL steel - in climatic embodiment UHL1, according to GOST 15150-69.
| Model | Specifications |
Ru | Temp,
0C | Du, mm |
| 16ch42r | cast-iron,
back-pressure,
rotary, water | 25 |
50 | 50; 80;100;
150; 200; 250; 300; 400 | | 19ch21br |
cast-iron, back-pressure,
rotary, water |
16 | 225 |
50; 80;100;
150; 200; 250 |
| 25ch940nj | liquid
and gaseous mediums | 16 |
220 | 25; 40;
50; 80 | | |
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