DN40 to DN40 Check Valve Female to male DIN 11851 butterfly valve

DN40 check valve female to male DIN 11851

Stainless steel check valve with a DN40 female connection on one side and a DN40 male connection on the other, both to DIN 11851, also known as dairy coupling. A check valve lets liquid through in one direction and closes by itself if the flow tries to reverse.

Use it where you want to stop liquid running the wrong way in a line, for example after a pump or when transferring between tanks. It has no handle and works fully automatically.

Benefits

• Prevents backflow automatically
• Female and male in the same size – fits straight into a DN40 line
• DIN 11851 dairy coupling on both sides

Technical data

• Connection 1: DN40 female, DIN 11851 (dairy coupling)
• Connection 2: DN40 male, DIN 11851 (dairy coupling)
• Type: check valve
• Material: stainless steel
• Item number: AY-851CV-DN40F-DN40M

The full DIN 11851 series

Accessories

• EPDM gasket for DN40 (DIN 11851)
• Hook spanner for DIN 11851 dairy couplings

See all our DIN couplings and products from Brumetal.

Frequently asked questions

What does a check valve do?
It lets liquid through in one direction and closes automatically if the flow reverses.

What is DIN 11851?
DIN 11851 is a German standard for threaded pipe couplings in the food industry, often called dairy coupling. The male side has external threads and connects to a female part with a nut and gasket.

Do I need a gasket?
Yes, DIN 11851 couplings are sealed with a gasket. An EPDM gasket for DN40 is sold separately.