threaded check valve

Threaded non-return valves in angle seat valve design

The task of a Y-design non-return valve is to prevent reflux of a liquid or gaseous medium against the flow direction. The advantage of the angle seat non-return valve lies in the high flow volumes that can be guaranteed in the flow direction and the reliable seal in the other direction. The seal is achieved in the valve as a result of the internal spring, which pushes a stainless steel disc against the flow direction onto the valve seat, thereby closing the flow opening. The spring is designed such that it even opens if there is a low pressure in the flow direction, allowing the medium to flow.

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Y-type check valve DN15 - 1/2" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN15 - 1/2" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€19.40*

€23.09 VAT included.

Delivery time: in stock

Express delivery:

Y-type check valve DN25 - 1" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN25 - 1" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€36.40*

€43.32 VAT included.

Delivery time: 3 - 5 working days

Y-type check valve DN32 - 1 1/4" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN32 - 1 1/4" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€49.50*

€58.91 VAT included.

Delivery time: in stock

Express delivery:

Y-type check valve DN50 - 2" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN50 - 2" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€88.20*

€104.96 VAT included.

Delivery time: in stock

Express delivery:

Y-type check valve DN20 - 3/4" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN20 - 3/4" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€25.60*

€30.46 VAT included.

Delivery time: in stock

Express delivery:

Y-type check valve DN10 - 3/8" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN10 - 3/8" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€19.40*

€23.09 VAT included.

Delivery time: in stock

Express delivery:

Y-type check valve DN40 - 1 1/2" inch made of stainless steel 1.4408 seal PTFE for liquid and gaseous media

diameter:

DN40 - 1 1/2" inch

design:

Y-type check valve

seal:

PTFE

body material:

stainless steel 1.4408

pressure range:

0 - 40 bar

NieRuf-Exchange
Certified
€66.80*

€79.49 VAT included.

Delivery time: 3 - 5 working days

Angle seat non-return valve made from high quality stainless steel.

The casing, the disc and the cover of the angle seat non-return valves are made from high quality stainless steel 1.4408, the spring comprises SS316 and the soft seal is PTFE. The Y non-return valve is available with bilateral internal thread BSP in the nominal widths G ¼“ – 2 ½“ inches. The length of the valves is between 64mm and 167mm, depending on the model. The stainless steel non-return valves can be used up to pressure level PN40. The lower opening pressure differs depending on the nominal width and is between 40mbar and 25mbar (more precise information is contained in the respective datasheet). The valve is suitable for liquid and gaseous media, as well as neutral and non-neutral media with temperatures between -25°C and a maximum of +200 degrees Celsius.

Use of the Y non-return valves

The Y-design non-return valves are frequently used in heating engineering in the cold and hot water area, there are particularly in demand here because of the good temperature properties, the high flow values, the low opening pressure, the short lengths and the reliable sealing. These valves are also very popular in other areas thanks to the easy installation, the low price and fast cleaning. For example, they are installed in tank systems, for garden irrigation, in pump systems and in water and water treatment plants.

Maintenance and cleaning of the threaded check valves

In normal cases, the valves are very insensitive to malfunction and low maintenance. However, is dirt is not filtered out of the medium, the has to be cleaned occasionally. Impurities, for examine in the water, can limit the functioning of the spring and disrupt the opening and closing process. For easy cleaning, the valve should be installed between two ball valves , this makes it easier to remove it from the pipe and refit it. The cap of the Y non-return valve can then be removed and the internal spring cleaned with water. If is is too difficult, a dirt trap can be installed before the non-return valve. This removes dirt before it reaches the valve. However, the dirt trap also have to be cleaned occasionally.


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