Page 317 - TORO PRODUCT CATALOGUE NOV_2019

Backwash Valve 350 Series
Applications
For use with F600 Sand Media Tanks. The valves provide three way operation for backwashing.
Features
• Unique diaphragm actuated plug assembly for smooth operation
• No rolling diaphragm
• Closes supply port before backflush port opens
• No supply water to waste
• High flow capacity
Pressure Loss, Kv Factor for Bermad 350 series Backwash Valves (Angle Flow)
Valve Code
End Connections
Flush Connections Pressure Range Maximum Temperature Chambers
Valve Body
Separating Partition
Cover
Diaphragm
Seats, Diaphragm washers
Plug, Plug washer
Stopper Disc
Seal, O-Rings
Spring
Shaft
External Bolts, Nuts and Discs
Control Chamber Volume Displacement
BFVL22P
Specifications
BFVL33P
Size
H (mm)
R (mm)
La (mm) Lb (mm) ØC (mm) Weight (kg)
2” x 2” Threaded
274 127 90 90 126 2.8kg
3” x 3” Grooved
378 120 143.5 143.5 160.5 2.8kg
4” x 4” Grooved
464 225 138.5 178.5 210 9.9kg
Code
BFLV22P IR2X2350-55-A-BP BFLV33P BFLVL44P
Dimensions and Weights
Ordering Information
Description
2˝× 2˝ 350 Series Plastic Backwash Valve (no coil)
2˝× 2˝ 350 Series Plastic Backwash Valve (with 24VAC coil)
3˝× 3˝ 350 Series Plastic Backwash Valve (no coil)
4˝× 4˝ 350 Series Plastic Backwash Valve (no coil)
BFVL22P
BFVL33P
2" BSPF/50mm Thread 2" BSPF/50mm Thread 70-1000 kPa
65˚C
2
Polyamide 6 - 30GF
Polyamide 6 - 30GF
Polyamide 6 - 30GF
NR-AL52 Nylon Fabric Reinforced Brass
Acetal Copolymer
PVC-U
NBR
Stainless Steel AISI 302
Stainless Steel AISI 303
Stainless Steel
0.13 L
3"/80mm Grooved 3"/80mm Grooved 70-1000 kPa 65˚C
2
Polyamide 6 - 30GF
Polyamide 6 - 30GF
Polyamide 6 - 30GF
NR-AL52 Nylon Fabric Reinforced Brass
Acetal Copolymer
PVC-U
NBR
Stainless Steel AISI 302
Stainless Steel AISI 303
Stainless Steel
0.34 L
Code
BFLV22P BFLV33P BFLV44P
Valve
2x2-350-P 3x3-350-P 4x4-350-P
Filtering Mode
Kv = 52 Kv = 110 Kv = 225
Backwash Mode
Kv = 48 Kv = 100 Kv = 205
Pressure Loss Equation : P = (Q / K v ) 2 where P = pressure loss in bar,
Q = flow in m 3/hr, Kv = m3/hr
at pressure loss of 1 Bar
BFLVL44P
BFLVL44P
4"/100mm Grooved 4"/100mm Grooved 70-1000 kPa
65˚C
2
Polyamide 6 - 30GF
Polyamide 6 - 30GF
Polyamide 6 - 30GF
NR-AL52 Nylon Fabric Reinforced Stainless Steel 304
Acetal Copolymer
PVC-U
NBR
Stainless Steel AISI 302
Stainless Steel AISI 303
Stainless Steel
0.55 L
297