25 cm De Marinis DESIGN SDT2S wood stove pipe with draught damper

The 250 mm De Marinis DESIGN SDT2S pipe is a straight component of the DESIGN flue system featuring an integrated draught control damper, designed for wood-burning stoves, fireplaces and biomass appliances.

It is manufactured from 2 mm carbon steel with a matt black high-temperature finish. Its robust construction and clean appearance make the DESIGN range particularly suitable for visible indoor installations.

The integrated damper allows the available flue gas passage area to be adjusted and can help regulate chimney draught where this solution is permitted by the appliance manufacturer and the design of the installation.

The component is available in nominal diameters Ø 120, 130, 140, 150, 160, 180 and 200 mm.

Main features

• Manufacturer: De Marinis
• Range: DESIGN
• Product family code: SDT2S
• Product type: straight pipe with draught damper
• Nominal length: 250 mm
• Function: draught regulation / restriction
• Material: carbon steel
• Steel thickness: 2 mm
• Finish: matt black
• Application: flue systems for wood-burning stoves, fireplaces and biomass appliances
• Available diameters: Ø 120, 130, 140, 150, 160, 180 and 200 mm
• Temperature class: T600
• Marking: CE
• Reference standard: EN 1856-2:2009

What the DESIGN SDT2S pipe is used for

The SDT2S combines a 25 cm straight flue pipe with an integrated draught control damper.

The damper allows the flue gas passage to be partially restricted where excessive chimney draught requires adjustment and where this solution is compatible with the appliance manufacturer's instructions and the design of the installation.

The component should be positioned in an accessible part of the flue connection so that the damper can be correctly operated and inspected.

Before purchasing, select the correct diameter and check that it matches the appliance flue outlet and all other components used in the installation.

Draught control damper

The internal damper changes the available passage area inside the pipe and allows the behaviour of the connecting flue to be adjusted.

The need for a draught damper and its correct position should be assessed according to:

• the characteristics of the stove or fireplace;
• available chimney draught;
• flue connection diameter;
• chimney height and configuration;
• overall connecting flue length;
• the appliance manufacturer's instructions;
• applicable installation regulations.

Important: the damper must not be adjusted in a way that compromises the correct evacuation of combustion products. Its position, adjustment and use must comply with the appliance manufacturer's instructions and the requirements established by the qualified installer.

Technical data and classification

The component belongs to the DESIGN system manufactured in accordance with EN 1856-2:2009 and is designed for high-temperature biomass applications.

• Temperature class: T600
• Pressure class: N1
• Condensate resistance: D
• Corrosion resistance class: VM
• Material/thickness designation: L01200-G440

De Marinis dimensions and product codes

The table below identifies the available 250 mm SDT2S pipe with draught damper variants. All dimensions are expressed in millimetres.

Øn indicates the nominal pipe diameter, while Hu and I correspond to the dimensions shown in the technical drawing included on the product page.

Technical note: for the SDT2S pipe, Hu is 200 mm and I is 50 mm, corresponding to a nominal overall length of 250 mm. The component features an integrated draught control damper. Please also refer to the technical drawing included on the product page.

How to read the technical drawing

The technical drawing included on the product page allows the dimensions and damper configuration to be checked before ordering.

• Øn: nominal pipe diameter
• Hu: useful main section dimension, 200 mm
• I: joint/insertion dimension, 50 mm
• Damper: integrated device for draught control

Comparing the technical drawing, dimensional table and selected diameter makes it easier to identify the exact De Marinis product code required for the installation.

DESIGN system compatibility

For correct dimensional continuity and system configuration, the use of De Marinis components from the same range and with the same nominal diameter is recommended.

Before combining components from different systems or manufacturers, their dimensional, technical and regulatory compatibility must be checked.

Installation

Pipe diameter, damper position, flue route, number of bends, draught, safety clearances and installation method must be determined according to the appliance, flue system and applicable regulations.

The DESIGN system is intended for indoor installation. Installation must be carried out by qualified personnel in accordance with the appliance manufacturer's instructions and applicable technical requirements.