Doyma: CuraInn Service Ducts

Whenever services need to be neatly passed through partition walls or floors, we have an appropriate service duct. The products range from rational, simple systems to complex solutions for the most exacting requirements in laboratories and hospitals.

The service tradesman, for the most part, installs service ducts at the same time as installing the service.

Normally, the duct comprises the sleeve ( 300 mm or 1000 mm long), rosette/plaster rings and rubber seals. All components readily fit together and are easily assembled on site. The shank length of the rosette helps compensate for wall and floor thickness variations. Sleeve and rosettes/plaster rings can be bonded together (17010 and 17020). For permanent closure of the cut out or core bore, we recommend the use of expanding grout from mortar group lll.

Properties

The most important properties of Doyma service ducts for interior finishing are:

• Meet the requirements of DIN 4109: Noise Protection.
• Heat insulation according to the Heat Protection Order (Date 11/96).
• Gas- and air tight.
• Leakproof against damp and water.
• Services can be easily installed and readily exchanged.
• Clicking noises associated with pipe expansion and contraction are eliminated.
• Axial movement and cross-sectional size changes are accommodated.
• Protection against insect penetration.

The service ducts meet the requirements of DIN 18380 (Heating and Industrial Water Heating Systems) and DIN 1988 (Technical Rules for Potable Water Installations).

Materials

• Sleeves / rosettes: ABS
• Heat resistant up to 110° C
• Screw caps: ABS with polished stainless steel cover
• Seal rings: EPDM, NBR, expanded or foam rubber; heat resistant up to 120° C