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Tecofi » Check Valves » Dual Check Valves - DN40 to DN800

Dual Check Valves, also called Double Door Check ValvesDual Plate Check ValvesDuo Check Valves or Butterfly Non Return Valves are another popular non return valve for a range of applications.

The two doors flap together to allow flow and spring back onto their seat to prevent reverse flow.  They are good for horizontal and upwards forward flow and, in some cases, downwards flow.

This range has been so successful that it has recently been extended to include PN25 and Stainless versions.

We carry UK stocks backed up by huge stocks at head office in France.

Dual Check Valve Sectioned
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Our CB 3448 Twin Plate Check Valve has a Cast Iron body with plated Ductile Iron discs and EPDM seal.  Rated PN16 it is wafer pattern for mounting between flanges.  The face-to-face is to EN558 Series 16.

The Cast Iron Wafer Pattern Dual Check Valve is available in the following sizes
DN 40, DN 50, DN 65, DN 80, DN 100, DN 125, DN 150, DN 200, DN 250, DN 300, DN 350, DN 400, DN 450, DN 500, DN 600, DN 700, DN 800.
Or in Imperial
1 1/2 Inch, 2 Inch, 2 1/2 Inch, 3 Inch, 4 Inch, 5 Inch, 6 Inch, 8 Inch, 10 Inch, 12 Inch, 14 Inch, 16 Inch, 18 Inch, 20 Inch, 24 Inch, 28 Inch, 32 Inch.

Download the datasheet here
Dual Check Valves Cast Iron PN16

Double Door Check Valve

The CB 4450 is the PN25 version of the CB3448 Twin Plate Check Valve. It is almost identical to the CB3448 but with a Ductile Iron body.

CB4450 is available in the following sizes
DN 40, DN 50, DN 65, DN 80, DN 100, DN 125, DN 150, DN 200, DN 250, DN 300, DN 350, DN 400, DN 450, DN 500.
Or in Imperial
1 1/2 Inch, 2 Inch, 2 1/2 Inch, 3 Inch, 4 Inch, 5 Inch, 6 Inch, 8 Inch, 10 Inch, 12 Inch, 14 Inch, 16 Inch, 18 Inch, 20 Inch.

Download the datasheet here
Dual Check Valves Ductile Iron PN25

Double Door Check Valve PN25

The Stainless Dual Check Valve Range has a different seat material.
DN50 - DN200 have FPM (Generic Viton®) rubber,
DN250 and above have Nitrile rubber. Most of the range has face to face to EN558 Series 16 except DN50, DN65 and DN80 are Series 50, if you need Series 16 for these sizes then use the CB6450 below.
CB6442 is rated PN16.
Viton is a Registered Trade Marks of DuPont.

CB6442 sizes are
DN 50, DN 65, DN 80, DN 100, DN 125, DN 150, DN 200, DN 250, DN 300, DN 350, DN 400, DN 450, DN 500, DN 600, DN 700, DN 800.
Or in Imperial
2 Inch, 2 1/2 Inch, 3 Inch, 4 Inch, 5 Inch, 6 Inch, 8 Inch, 10 Inch, 12 Inch, 14 Inch, 16 Inch, 18 Inch, 20 Inch, 24 Inch, 28 Inch, 32 Inch.

Download the datasheet here
PN16 Stainless Dual Check Valves

Stainless Double Door Check Valve

CB6450 PN25 Stainless Twin Plate Check Valve is virtually the same as the CB6442 but rated PN25 and all the valves are EN558 Series 16.

CB6450 is available in the following sizes
DN 50, DN 65, DN 80, DN 100, DN 125, DN 150, DN 200, DN 250, DN 300, DN 350, DN 400, DN 450, DN 500, DN 600.
Or in Imperial
2 Inch, 2 1/2 Inch, 3 Inch, 4 Inch, 5 Inch, 6 Inch, 8 Inch, 10 Inch, 12 Inch, 14 Inch, 16 Inch, 18 Inch, 20 Inch, 24 Inch.

Download the datasheet here
PN25 Stainless Dual Check Valves

Stainless Double Door Check Valve PN25

 

These Dual Check Valves are a low cost option for a variety of applications - Contact us for advice on your application.

 

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Non return valves
from a UK valve expert.

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