TYPE F HEADS
SEMI-ELLIPTICAL HEADS
Specifications summary
Drawing legend
Tolerances
| D | R | r | h | s |
|---|---|---|---|---|
| 500 ÷ 4000 | 0.8 X D | D/6.5 | ≥ 5 x s | 3 ÷ 22 |
| SV | D x 1.16 + 2h |
| Ht | D x 0.25 + h + s |
External diameter
Straight flange height
Internal diameter
Total external height = H+h+s
Thickness
Internal height without straight flange
Dishing radius
Blank diameter required to produce the head
Knuckle radius
Head capacity in liters
For pressed heads, the tolerances applied are those of the standards in force (in particular the AFRON NFE 81-100/1997 standard)
For rolled heads, the tolerances are as follows:
On external diameter:
< Ø 2000 = ± 2 ‰ · Ø
> Ø 2000 = ± 3 ‰ · Ø
Out-of-roundness (maximum difference between minimum diameter and maximum diameter)
± 3 ‰ · Ø
Total height (for non-trimmed heads)
– 0 +25 mm
Plates
The dimensional and shape tolerances of plates to be taken as reference, unless otherwise agreed by contract, are in accordance with standards UNI EN 10025 and UNI EN 10051.
However, it is possible to request tighter tolerances at the time of order, for which feasibility will be evaluated.
Drawing legend
External diameter
Straight flange height
Internal diameter
Total external height = H+h+s
Thickness
Internal height without straight flange
Dishing radius
Blank diameter required to produce the head
Knuckle radius
Head capacity in liters
Specifications summary
| D | R | r | h | s |
|---|---|---|---|---|
| 500 ÷ 4000 | 0.8 X D | D/6.5 | ≥ 5 x s | 3 ÷ 22 |
| SV | D x 1.16 + 2h |
| Ht | D x 0.25 + h + s |
Tolerances
For pressed heads, the tolerances applied are those of the standards in force (in particular the AFRON NFE 81-100/1997 standard)
For rolled heads, the tolerances are as follows:
On external diameter:
< Ø 2000 = ± 2 ‰ · Ø
> Ø 2000 = ± 3 ‰ · Ø
Out-of-roundness (maximum difference between minimum diameter and maximum diameter)
± 3 ‰ · Ø
Total height (for non-trimmed heads)
– 0 +25 mm
Plates
The dimensional and shape tolerances of plates to be taken as reference, unless otherwise agreed by contract, are in accordance with standards UNI EN 10025 and UNI EN 10051.
However, it is possible to request tighter tolerances at the time of order, for which feasibility will be evaluated.
SINCE 1965 TECNOFONDI SPA HAS BEEN PRODUCING DISHED HEADS, RELY ON THE INDUSTRY LEADERS
Main applications
THERMO-HYDRAULIC
FARMING
FOOD
CHEMICAL AND PHARMACEUTICAL
