BWT besthead ST 3 - Technical Data; Dimensions and Weights; Operating Conditions

English
10
1 Scope of delivery
For the professional installation of the filter system the following parts are required:
 Filter cartridge (1) in sizes X, S, V, M, L, XL, or 2XL with hygienic cap and male thread for screwing
into the filter head (2).
 Filter head (2) with female thread for mounting the filter cartridge (1), suitable for all filter cartridge
sizes with installation label. An Aquastop and two non return valves (inlet and outlet) are installed in
the filter head.
 Bracket (3) for mounting the filter cartridge.
The filter cartridge has to be ordered separately form the filter head. The filter bracket is included in the
scope of delivery of the filter head.
2 Technical data
2.1 Dimensions and weights
Type
X S V M L XL 2XL
Total height with-
out bracket, max.
A
mm
(inch)
280
(
111
/
16
)
360
(
143
/
16
)
420
(
169
/
16
)
475
(
1811
/
16
)
502
(
193
/
4
)
502
(
193
/
4
)
580
(
213
/
16
)
Total height with
bracket
B
mm
(inch)
305
(12)
385
(
153
/
16
)
445
(
171
/
2
)
500
(
1911
/
16
)
527
(
203
/
4
)
527
(
203
/
4
)
600
(
235
/
8
)
Connection height C
mm
(inch)
226
(
87
/
8
)
306
(
121
/
16
)
366
(
147
/
16
)
421
(
169
/
16
)
448
(
1711
/
16
)
448
(
1711
/
16
)
520
(
207
/
16
)
Distance from
floor
D
mm
(inch)
65
(
29
/
16
)
65
(
29
/
16
)
65
(
29
/
16
)
65
(
29
/
16
)
65
(
29
/
16
)
65
(
29
/
16
)
65
(
29
/
16
)
Installation length E
mm
(inch)
125
(
415
/
16
)
125
(
415
/
16
)
125
(
415
/
16
)
125
(
415
/
16
)
125
(
415
/
16
)
125
(
415
/
16
)
125
(
415
/
16
)
Filter cartridge Ø F
mm
(inch)
88
(
37
/
16
)
88
(
37
/
16
)
110
(
45
/
16
)
130
(
51
/
8
)
147
(
511
/
16
)
147
(
53
/
4
)
185
(
71
/
4
)
Distance for hori-
zontal installation
G
mm
(inch)
37
(
17
/
16
)
37
(
17
/
16
)
44
(
13
/
4
)
51
(2)
60
(
23
/
8
)
60
(
23
/
8
)
90
(
39
/
16
)
Weight of dry filter
cartridge, approx.
kg
(lb)
0.5
(1.01)
0.9
(1.99)
2.1
(4.63)
2.4
(5.30)
3.4
(7.50)
3.8
(8.38)
7.5
(16.53)
Weight of wet filter
cartridge, approx.
kg
(lb)
1.1
(2.43)
1.5
(3.31)
3.2
(7.06)
4.2
(9.26)
5.9
(13.01)
6.0
(13.23)
11.0
(24.25)
2.2 Operating conditions
Type
X S V M L XL 2XL
Connection thread (intake/outlet)
3
/
8
" (BSP male) alternatively Ø 8 mm push-fit
Nominal flow L/h (US gal/h) 60 (15.9)
Working pressure range bar (psi) 2 – 8 (29 - 116)
Intake water pressure bar (psi) > 1.2 (> 17.4)
Pressure loss at 30 L/h
(8 US gallons/h)¹
bar
(psi)
0.10
(1.5)
0.10
(1.5)
0.10
(1.5)
0.05
(0.7)
0.05
(0.7)
0.10
(1.5)
0.20
(2.9)
Pressure loss at 60 L/h
(16 US gallons/h)¹
bar
(psi)
0.15
(2.2)
0.15
(2.2)
0.15
(2.2)
0.20
(2.9)
0.15
(2.2)
0.15
(2.2)
0.30
(4.4)
Pressure loss at 180 L/h
(48 US gallons/h)¹
bar
(psi)
0.60
(8.7)
0.60
(8.7)
0.60
(8.7)
0.50
(7.3)
0.40
(5.8)
0.50
(7.3)
0.60
(8.7)
Water temperature, min.–max. °C (°F) +4 to +30 (+39 to +86)
Ambient temperature, min.–max. °C (°F) +4 to +40 (+39 to +104)
Ambient temperature during
transportation/storage, min.–max.
°C (°F) -20 to +40 (-4 to +104)
Bed volume L (US gal)
0.45
(0.1)
0.70
(0.2)
1.50
(0.4)
2.00
(0.5)
2.50
(0.7)
3.10
(0.8)
6.50
(1.7)
Operating position horizontal or vertical
Minimum flushing volume L (US gal) 1 (0.3) 2 (0.5) 3 (0.8) 5 (1.3) 7 (1.9) 9 (2.4) 15 (4)
¹ Bypass setting “2”, with a 1.5 m (59.06 inch) hose DN8 fitted to both the intake and outlet.
1
2