domain of usage:

Regulating, reducing and keeping constant the output pressure of the valve in the transmission, network and distribution lines of drinking and raw water even if there is a fluctuation in the input pressure.

Application temperature range: up to 70 degrees Celsius

Production range: DN50…DN800, PN10…PN40

Reference standards in design and construction

Face to face dimensions of two valve flanges according to the standards: DIN-EN558-1 Series, DIN3202-1 SeriesF1

Dimensions and drilling of flanges according to standards: DIN-EN 1092/1-2, DIN2501, ISO7005/1-2

Hydrostatic tests (sealing, pressure resistance and functional): ISO 5208

Type of cast iron: gray cast iron: DIN-EN 1561 GJL 250 DIN1691 GG-25

Ductile iron: DIN-EN 1563 GJS400-15 DIN 1693 GGG-40

Inner and outer coating: epoxy electrostatic powder paint/epoxy liquid paint.

 Description:Important note: 1. The ratio of the adjusted output pressure of the valve to the input pressure should be such that the valve operates within the allowed range (outside the cavitation range), otherwise, due to the destructive phenomenon of cavitation, the internal parts will wear out and therefore The useful life of the milk will be reduced.

2. For installation and operation, please pay attention to the instructions for automatic mechanical pressure relief valve of Navid Kariz friends.

Mechanism and how it works:

The design of the automatic pressure relief valves of Navid Kariz Dostan company is such that by means of the adjustable spring force above the diaphragm and also the amount of pressure difference (P2-PA=ΔP) between the input pressure P1 and the output pressure P2, it is able to reduce the pressure to the set amount. It reduced the output and prevented pressure fluctuations in the output. It is worth mentioning that in the design of this valve, without using the external control circuit of the valve, by using the output water pressure directed below the diaphragm and the adjusted force of the spring from above the diaphragm, the action of reducing and stabilizing the output pressure is done automatically.