are float-controlled robust valves made of spherical-graphite cast iron to handle large air volumes e.g. in sand filters.
The internal components are made of made of Cr/CrNiMo-steel/red brass and the float is made of CrNiMo-steel.
Up to 130 °C the valve cone is fitted with a soft seal; up to 200 °C the seal is metallic.
- Body made of spherodial cast iron
- Internal components made of stainless steel/red brass
- Float made of stainless steel
- Soft or metallic seal
- Manual bleed valve made of stainless steel
- Rubber or plastic coating for corrosive fluids
- Non-return valve to prevent venting
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