PRODUCT QUERY

Flanged Backflow Preventer

Flanged Backflow Preventer

  • PN 10/16
  • Material
    Ductile iron
  • Nominal diameter
    DN65-400
  • Face to face standard
    Series 3 of BS EN558-1
  • Flange drilling
    BS EN 1092
Features

Backflow preventer is equipped with two independent check valves that have no linkage with other moving components.


The check valve with a rocker arm type structure has good sealing performance and low water flow resistance.


A valve bonnet is installed in the middle chamber of the backflow preventer, By disassembling the valve bonnet, the internal parts of the valve is advantageous for the on-site maintenance.


By scanning the product QR code, you can check the maintenance status of the backflow preventer online on your mobile phone.


The parts of the valve have strong corrosion resistance.Coating and rubber got WARS certification.


Material

No.

Part

Material

1

Body

D.I./Stainless Steel 304

2

Check Valve Spring

1Cr18Ni9Ti

3

Check Valve Stem

2Cr13

4

Bonnet

D.I./Stainless Steel 304

5

Circlip

Stainless Steel 304

6

Check Valve Seat

D.I./Stainless Steel 304

7

Check Valve Disc

Stainless Steel 304

8

Drain Valve Body

D.I./Stainless Steel 304

9

Drain Valve Funnel

D.I.

10

Drain Valve Stem

2Cr13

11

Diaphragm

EPDM

12

Drain Valve Bonnet

D.I./Stainless Steel 304

Main Dimention

  • DN$mm
    in.
    A
    B
    C
    D
    E
    F
    Φ
    n-Φ$PN10
    n-Φ$PN16
    W$kg
  • 65
    2-1/2
    619
    279
    170
    185
    185
    315
    200
    4-19
    4-19
    65
  • 80
    3
    691
    331
    180
    200
    200
    365
    240
    8-19
    8-19
    81
  • 100
    4
    795
    415
    190
    220
    210
    400
    280
    8-19
    8-19
    112
  • 150
    6
    950
    530
    210
    285
    260
    505
    280
    8-23
    8-23
    176
  • 200
    8
    1105
    645
    230
    340
    310
    595
    360
    8-23
    12-23
    262
  • 250
    10
    1250
    750
    250
    400
    375
    675
    360
    12-23
    12-28
    455
  • 300
    12
    1400
    860
    270
    455
    435
    792
    450
    12-23
    12-28
    603
  • 350
    14
    1568
    985
    290
    515
    495
    895
    450
    16-23
    16-28
    748
  • 400
    16
    1720
    1100
    310
    575
    550
    1010
    450
    16-28
    16-31
    1018