Dampers - AL
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PROVIDED BY HEINEN & HOPMAN

DAMPERS There are different types of dampers: • Fire and gas dampers • Shut-off dampers • Smoke dampers • Non-return valves • Non-return dampers • Air-flow diffusers Fire and gas dampers Fire and gas dampers prevent the spread of fire, smoke and gas between ventilation ductwork, where people must have the maximum amount of time to react to possible fire. The dampers are type-approved according to A-0 (A-60). ALFD fire and gas dampers Frame: Hot-dip galvanized steel. Thickness: 3-5 mm. Blades: opposed blades filled with fire-resistant mineral wool sealed with thermal expanding gasket. Sizes:...

Non-return valves ALNV non-return valves are installed in ventilation ductwork of ships and off-shore objects to prevent the backflow of air through the ventilation ducts. Air flow diffusers ALAD air flow diffusers are installed in ventilation ductwork of seagoing ships and off-shore objects. ALAD air flow diffusers enable adjustment of the supplied air flow direction or the closing air supply. Classification ALFD Non-return dampers ALND non-return dampers are installed in ventilation ductwork of ships and off-shore objects to prevent the backflow of air through the ventilation ducts. ALAD...

ALFD fire and gas dampers ALFD fire and gas dampers prevent the spread of fire, smoke and gas between the ventilation ductwork, where people must have the maximum amount of time to react to possible fire. The dampers are type-approved according to A-0 (A-60). The dampers have a flanged steel casing with opposed blades with thermal expanding gasket. The fail-safe is made by a thermal release device which operates if the temperature inside the duct increases above 72 °C (optionally 90 °C). If the power supply is interrupted, a spring return actuator closes the blade. The actual position of...

ALSD smoke dampers ALCT shut-off dampers ALCT shut-off dampers shut off the airflow in ductwork. The dampers can be used as functional isolating dampers or as fire closure of main external ventilation openings as required by SOLAS. The dampers have a mild-steel frame and rotary blades actuated electrically, pneumatically or manually. The voltage or the working pressure of the control air must be specified at order. ALSD smoke dampers prevent the spread of smoke and gases through the pipework in case of fire. The dampers have a steel casing with spiro pipe connections on both ends and with a...

ALNV non-return valves ALNV non-return valves are installed in ventilation ductwork of ships and off-shore objects to prevent the backflow of air through the ventilation ducts. The valves must be installed horizontally or vertically. H B L G S Weight mm Performance chart (air static pressure that opens the flap) Hot-dip galvanized Stainless steel Stainless steel Alternatives available on request. Due to continued product development, Heinen & Hopman reserves the right to introduce alternations without prior notice.

ALND non-return dampers ALND non-return dampers are installed in ventilation ductwork of ships and off-shore objects to prevent the backflow of air through the ventilation ducts. The dampers do not require an actuator or motor. The dampers must be installed horizontally or vertically. The dampers can be easily adjusted by adjusting the weight of each damper/installation or by adjusting the weights fitted to the blade shafts. The minimum opening force can be easily adjusted by the counterweights fitted to the blade shafts. • Standard construction places weights on the right-hand side....

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