Stainless steel swing flanged check valve 19nzh10bk Pn 160

Stainless steel check valves 19nzh10bk PN 160 are check flange valves designed to prevent backflow of the working medium in pipelines. The main function of the check valves is to automatically close the passage when the pressure drops or the supply of the working medium stops, which prevents the flow from moving in the opposite direction. The valves are used to work with liquid and gaseous media, including petroleum products, oil, oils, gas condensate, water, steam and ammonia. They are also suitable for aggressive environments due to the body material made of corrosion-resistant steel.

Design and operating principle

19nzh10bk check valve consists of the following main elements:

• Body: Made of corrosion-resistant steel.
• Flap: A disk with a counterweight, which is fixed on the axles inside the body. The flap opens under the influence of the force of the working medium flow and closes under the force of gravity or back pressure.

Operating principle:

1. When the working medium moves in the correct direction (in the direction of the arrow on the body), the flap rotates on the axles and opens the passage.
2. If the pressure in front of the valve drops or the flow stops, the flap automatically closes under the force of gravity and backflow.
3. The sealing surfaces of the flap and the body provide class “A” tightness 

Installation positions

1. On a horizontal pipeline, the valve is installed so that the “Top” marking on the body is on top.
2. On a vertical pipeline, the sealing surface of the cup must be directed upwards (the arrow on the body indicates the direction of flow of the medium).

Advantages of use

1. Automatic operation without the need for an external drive or regular maintenance.
2. High durability due to the use of corrosion-resistant materials.
3. Possibility of application in aggressive environments of the chemical industry or food industry.
4. Protection of pumping equipment from damage in emergency situations by preventing backflow of the working medium.

Application areas

Valves 19nzh10bk are widely used in the following industries:

1. Oil and gas industry - transportation of oil and oil products.
2. Chemical industry - working with aggressive liquids and gases.
3. Food industry - thanks to environmentally friendly materials of the stainless steel body.