Features
- manufactured from 50 (Ø2”) to DN 3600 (Ø144”)
- single arch and multi arch construction
- available flange drilling: ANSI, AWWA, UNI, DIN, BS and/or special drilling
- special execution with internal layer acid resistant
- special internal textile reinforcement suitable for temperature up to 205°C
- high strength metallic carcass
- minimum pressure safety factor 4:1
- accessories: control tie rods, gussets and/or integral flanges in carbon
- steel or stainless steel can be supplied
“Spoolflex” rubber expansion joints (spool arch configuration) manufacturing peculiarities
For a better understanding of high technology profile of such a product following consideration are a must:
- rubber body is made with high thickness, both on flange area and on spool arch
- carcass, the “framework” of compensator body, is made by means of rings/plates of very high flexibility and resistance, able to withstand pressure and/or full vacuum
- textile reinforcement insert are made with high resistance fibers
- no reinforcement “at sight” as all reinforcement are embedded in the rubber body
Relevant advantage are evident:
- high thickness will guarantee stability on flange area, with a consequent full thickness also with big dimension and in presence of high pressures
- rubber body, thickness to carcass structure, can withstand heavy stress caused by internal pressure without any additional external adds (for example lose flange with containing ring integrated)
Absence of internal elements at sight, as vacuum rings, offers several advantages:
- better fluid dynamics
- shape stability. in case of positive pressure internal ring can move away from its normal position and obstruct the correct working
- less permanent deposit of material inside, due to interference with internal elements
- allow movements without any limitation caused by internal ring
| Operating temperatures | |||
|---|---|---|---|
| standard materials (rubber) | max operating temperatures | ||
| rubber tube | external cover | ||
| butyl | butyl | B | 121°C |
| EPDM | EPDM | E | 121°C |
| EPDM | EPDM | E | 149°C (1) |
| hypalon | hypalon | H | 107°C |
| hypalon | hypalon | HN | 107°C |
| nitrile | nitrile | NiN | 99°C |
| neoprene | neoprene | NR | 82°C |
| viton | viton | VV | 205°C |
| (1) Emergency condition time within 2 hours | |||