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Threaded Backflow Preventer

Threaded Backflow Preventer

  • PN 10/16
  • Material
    Stainless steel
  • Nominal diameter
    DN15-50
  • Face to face standard
    Series 3 of BS EN558-1
  • Flange drilling
    BS EN 1092
Features

Made of stainless steel,with high strength and outstanding appearance,in compliance with relevant hygiene regulations.


Provide high-grade protection to prevent pressure and siphon backflow.


Full waterway,wide body and double independent check valve design ensure the stability of operating conditions.


The streamline design of the main valve disc ensures low friction and flow state,providing low pressure loss at the highest flow rate.


Material

No.

Part

Material

1

Body

Stainless Steel 304

2

Check Valve Spring

Stainless Steel 304

3

Check Valve Stem

Stainless Steel 304

4

Bonnet

D.I.

5

Circlip

Stainless Steel 304

6

Check Valve Seat

Stainless Steel 304

7

Check Valve Disc

Stainless Steel 304+EPDM

8

Drain Valve Body

Stainless Steel 304

9

Drain Valve Spring

Brass+EPDM

10

Drain Valve Stem

Stainless Steel 304

11

Drain Valve Gasket

EPDM

12

Drain Valve Bonnet

Stainless Steel 304

Main Dimention

  • DN
    in.
    A
    B
    C
    D
    Φ
    W（kg）
  • 15
    1/2
    270
    160
    86
    111
    75
    3.2
  • 20
    3/4
    280
    160
    86
    111
    75
    3.5
  • 25
    1
    332
    190
    90
    118
    80
    6.5
  • 32
    1-1/4
    350
    190
    90
    118
    80
    7
  • 40
    1-1/2
    404
    223
    105
    128
    100
    9.5
  • 50
    2
    438
    223
    105
    128
    100
    11