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A lifting non-return valve with a flange type mounted on a pipeline is a mechanical device that allows the flow of the working agent to move only in one direction and prevents the occurrence of the opposite flow.
The mechanism of action of the non-return valve
The check valve is a one-way distribution device. That is, the device has two openings in its housing: the working flow enters one of them, and the other exits.
The working medium moving in the desired direction opens the valve, and the oppositely directed flow closes it. This mechanism works automatically when liquid or gas moves in the wrong direction.
The check valve has a calculated pressure. It corresponds to the lowest input pressure sufficient for the device to open and start functioning.
Reverse lift valve of the flange type in the ETNA catalog
ETNA company offers to purchase many varieties of high-quality non-return valves, including the reverse lifting flange valve art. 287 ZETKAMA. It is widely used in industry, refrigeration plants, thermal lines, and shipbuilding.
This non-return valve is intended for working with technical hot and cold water, steam, glycol, chemically neutral substances, compressed air and diathermic oils. It should be used in normal conditions. If it is planned to use it with abrasive or aggressive working agents, it is necessary to consult the manufacturer.
Characteristics of the valve art. 287 ZETKAMA:
- The material of manufacture is malleable cast iron, series cast iron, steel.
- Cross section – 15–300 mm.
- Nominal pressure – 1,6; 2,5; 4,0 MPa.
- The range of working temperatures is from -10 to +400
- .
- The working position is arbitrary.
- Closure density according to EN — 12334.
Advantages of the mechanism:
- environmental Safety;
- short construction length;
- convenient dimensions;
- no need for special maintenance.
Rules for installing the device
Installation of this armature must be carried out by workers with appropriate qualifications, instructed in the rules of safety technology. Before installing the return flange lifting valve art. 287 ZETKAMA in order to avoid injuries, it is necessary to display warning signs or protective shields.
Choose a place on the pipeline to install the mechanism. Sparks from welding work should not get there. In addition, it is necessary to mount the device on a piece of pipe where it will not be affected by stretching or bending forces. Install the valve in such a way that the direction of the arrow on its body coincides with the direction of the working flow.
