Restrained Connections with Düker´s thrust resisting joint systems
Socket systems - economic and efficient
With flangeless plug-in socket- and thrust-resisting joint systems by DÜKER, cast iron pipes, fittings and valves are connected safely within all water pipelines – among each other as well as with plastic pipes. Both sealing and locking function are guaranteed by each system. Material and connection withstand high internal and external pressure. This even applies for longitudinal displacements due to traffic or ground movements. The thrust-resistant socket joint follows ground movements without transferring bending moments to the next pipeline component.
Besides technical advantages of the systems, there are additional positive features such as handling with fewer tools and reduced mounting time. Depending on the system, fewer fittings are necessary for the same length of line, or certain special fittings can be done without. Furthermore, the dismantling of the thrust-resisting joints and the immediate pressure test is possible. The post-isolation can be carried out in a better quality and the thrust-resisting joints are applicable even in narrow ditches. Concrete blocks are completely dispensable.
Here the advantages at a glance:
SMU/ Düker SPEZIAL | TYTON® SIT® | TYTON SIT PLUS® | NOVO-SIT® | NOVO-Grip® III |
no additional corrosion problems | fast installation | fast installation | fast installation | fast installation |
dismantling possible | dismantling possible | dismantling possible | dismantling possible | dismantling possible |
elimination of outside locking devices for pipeline systems up to PN 16 | fewer fittings fort he same length of line | fewer fittings fort he same length of line | fewer fittings fort he same length of line | no specials fittings or valves required |
movability of the screwed connections is entirely maintained | post-isolation of better quality feasible | post-isolation of better quality feasible | post-isolation of better quality feasible | post-isolation of better quality feasible |
locking ring works also as contact ring | valves and fittings remain free of bending stress | valves and fittings remain free of bending stress | valves and fittings remain free of bending stress | valves and fittings remain free of bending stress |
applicable in narrow ditches | applicable in narrow ditches | applicable in narrow ditches | applicable in narrow ditches | |
| electrical separation possible | independent of the weather | ||
no special staff with welding licence necessary | ||||
no cooling required | ||||
fewer tools |