Manual Valve Models
- without automatic twin valve. the max head of the pump
should be at least 2 meters more than working head.
25 - 30 wt
BBF-2 1.5cm high 0.61cm
dia 210L backwash
4,500 20,000
3,000 13,500
100 lbs 45 kg
1.0 lb 450 gm
1,500 115
30 - 55 wt
or(3x11wt)
BBF-3 1.7cm high 0.79cm
dia 210L backwash
7,500 34,000
5,000 22,500
150 lbs 65 kg
1.5 lb 650 gm
2,500 190
The pump should be
rated at the ideal flow rate at the pumps working head, The
Max head of the pump should be at least 2.5 meters more than
the working head.
1x55 wt 2 x 30 wt
BBF-5 1.95cm
High 0.79cm dia 280L backwash
12,000 55,000
8,000 36,000
250 lbs 110 kg
2.5 lb 1.1 kg
4,000 300
2 x 55 wt 3 x 30 wt
BBF-7 2.25cm
high 0.79cm dia 340L backwash
16,500 75,000
11,000 50,000
350 lbs 150 kg
3.5 lb 1.5 kg
5,600 425
The pump should be
rated at the ideal flow rate at the pumps working head, The
Max head of the pump should be at least 2.5 meters more than
the working head.
3 x 55 wt 5 x 30 wt
BBF-9 2.5cm high 0.79cm
dia 400L backwash
22,000 100,000
14,500 66,000
450 lbs 200 kg
4.5 lb 2.0 kg
7,200 500
4 x 55
wt
N.B. A pressure release bypass is essential if using high
pressure pumps rated at 1.5 bar or over! e.g. rated with a
combined suction & delivery head exceeding 15m (50ft). (0.7
bar/7m head for BBF-1 & 2).
**Ideal flow rates are based on circulating the pond volume
through the filter: once every three hours in lightly
stocked ponds ( (1) = Max. Volume); and once every two
hours in typically stocked ponds ( (2) = Max. Volume).
Less UV is required in shaded conditions. More UV is necessary
if sterilizing.
Gallons are imperial - multiply by 1.2 for U.S. Gallons
All dimensions and backwash volumes are approximate.
