VALVOLE HOFMANN – Intermittent (Bottom) Blowdown Valve 11BD

The blowdown valve open manually by the action of the hand lever towards the direction of arrow B, the valve close automatically is the lever is led loose. It can also be pneumatic operated with air supply 2,7 bar (39,16 psi) minimum and 3,1 bar (44,96 psi) maximum.

It is available with EN-GJS- 400-18-LT (GGG40.3) nodular cast iron body with drilled PN16 UNI EN 1092-2 flanges or with AISI316 (1.4408) stainless steel body with drilled PN40 UNI EN 1092-1 flanges.

Maximum operate temperature for standard valve: 210°C (410°F) [Tmax ATEX 200°C (392°F)]
Maximum operate temperature for valve with finned extension: 350°C (662°F) [Tmax ATEX 350°C (662°F)]

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Main Features

Body in ductile iron EN-GJS-400-18-LT (GGG40.3), carbon steel WCB (1.0619) or AISI316 (1.4408)
Actuator in carbon steel with epoxy coating
4-Port body for easier maintenance and inspection without removing the valve from pipeline
Max temperature up to +350 °C (+660 °F)
Lever for manual operation with automatic return in closed position
Connections: DIN / ANSI flanges Connections: DIN / ANSI flanges – BSPP – NPT – BW – SW