Stenflex SA-25 Expansion Joint

Rubber Expansion Joint

90° D-21/D-22/D-41/42/1-C12
Rubber expansion joint Type D-21, D-22, D-41, D-42 ■
Square or oval universal expansion joint DN 150 – DN 7500 ed Customiz n o
ti c u d ro p
1 29
Applications
Type D-21
Type D-41
Structure type D-21
Structure type D-41
■ Rectangular universal expansion joint consisting of a rubber bellows and press-on retaining frame
■ Wide rubber rim
■ Rectangular universal expansion joint consisting of a rubber bellows and press-on retaining frame
(round corners) ■ Wide rubber rim
■ for reducing thermal and mechanical tension, e.g. at ■ ventilating fans
■ blowers ■ for muffling vibration and noise ■ for compensating axial and
lateral movement ■ to compensate for installation inaccuracies ■ air and ventilation technology
■ dedusting and filter engineering (clean-room technology)
Structure type D-42
Structure type D-22 ■ Rectangular universal expansion joint consisting of a rubber bellows
and press-on retaining frame ■ Frame with stiffening ring ■ Narrow rubber rim
■ Rectangular universal expansion joint consisting of a rubber bellows and press-on retaining frame
(round corners) ■ Frame with stiffening ring ■ Narrow rubber rim
Accessories ■ Internal guide sleeve
Rubber bellows PN 0,7 bar g ■ Extruded, endless vulcanized profile band ■ Without reinforcement
■ Self-sealing rubber rim Rubber grade* EPDM NBR
Colour code orange red
Possible uses Air, gases containing acids or lyes, dust Gases containing oil
*Check or inquire about the resistance of the rubber grade to temperature and medium.
Property Max. perm. operating pressure Vacuum operation
Pressure
Temperature
depending on DN not exceeding 0.7 bar g (see table) for light vacuum down to 0.98 bar abs.
up to +90 °C
Max. operating pressure to be set 30 % lower for shock loads.
STENFLEX ® type D-21 in an air-conditioning duct
Press-on retaining frame Version ■ Retaining frame with drilling for through bolts
Dimensions ■ Dimensions and drillings according to customer’s specification
Connection dimensions see technical annex
Materials Standard: 1.0038 (S235JR) Others: unalloyed steel, stainless steel, etc.
Corrosion protection Standard: anti-corrosion primed Others: hot-dip galvanized, special
varnish, special coating, etc.