Respiratory valves. Combined mechanical respiratory SMDK

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Tanks and process equipment

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Tanks and process equipment Products Tank equipment Respiratory valves
Combined mechanical respiratory SMDK


The calculation of the number
Calculation of the capacity of the respiratory valve

This service will help You calculate the bandwidth of the respiratory valve.
Directory for download .pdf
smdk.pdf (602,64 KB)
The purpose

Combined mechanical respiratory SMDK is intended to regulate the pressure of the oil vapor in a vertical tank during injection or pumping of oil products, as well as at temperature fluctuation.

The minimum bandwidth of respiratory valves is determined depending on the maximum performance primarization operations (including emergency conditions) according to the established formula. With the increased bandwidth of the apply valve respiratory DPT.

Not allowed to change the performance primarization operations after the introduction of the tank in operation without conversion bandwidth of the respiratory valve and increase the productivity drain of the product under emergency conditions.

Resistance to climatic factors in the external environment combined mechanical respiratory SMDK prepared performances (temperate climate) and UHL (cold climate with the lower limit of the operating temperature to -60°C) installation category 1 according to GOST 15150-69.

The established service life combined mechanical breather valve 15 years. Upon the expiration of the combined mechanical breather valve must be replaced with new or conducted his tests of periodic according to the method of the manufacturer.

The combined mechanical breather valve has the required documentation and the appropriate certification.
Specifications

THE 3689-003-10524112-2001 corresponds to:
AOS RS-75;
NGM Groups THAT 3689-018-79167039-2006.
The device and principle of operation

Combined mechanical respiratory SMDK consists of a body 8 that contained the pressure plates 6 with cargo 7, plates vacuum 3. In case SMDK installed the cartridge 11, which is designed to temporarily prevent penetration of a flame into the tank with oil and oil products when ignited, coming out of explosive mixtures of gases and vapors with air. Using plates 6 and 3 in the case of combined mechanical breathing valve SMDK formed chamber pressure and vacuum. Chamber through the apertures closed grids 10 and 12, is connected with the atmosphere. The grid prevents the pressure chamber and vacuum dust. Plates vacuum pressure sealed proterty to the seat and sit on the guide rods 1, 9, providing free movement of the plates. Upon reaching the pressure and vacuum in excess of the permissible, one of the plates opens and informs the gas space of the tank with the atmosphere. On each plate there is a hole, which is tightly closed by a cover 4, through which the performed inspection, production and seizure of goods. Cover through the strip 2 is pressed against the holes using a special device 5. The combined mechanical breather valve mounted on the tank cover with the oil through the flange through the gasket to the return flange of the tank. Working position - mounting flange down.

For reliable operation combined mechanical breather valve SMDK at low temperatures guide rod supply PTFE sheath square section, and the sealing surface of the plates combined mechanical breather valve SMDK tight PTFE film, which can be deformed, preventing the formation of ice. Combined mechanical respiratory SMDK installed on the tank roof.


General view of the combined mechanical breather valve SMDK:

1 - guide rod; 2 - a lining; 3 - plate; 4 - cover; 5 - special device; 6 - plate; 7 - cargo; 8 - body; 9 - guide rod; 10 - mesh; 11 - cassette; 12 - mesh.
Technical harakteristikinaimenovanie parameter SMDK-AA SMDK-AA SMDK-150 SMDK-200 SMDK-250
Nominal bore, mm 50 100 150 200 250
Capacity, m3/h 25-50 25-100 25-150 25-200 25-250
Overall dimensions, mm:
length 285 430 546 740 946
width 122 180 231 340 370
height 202 280 350 320 506
Pressure with the load, mm of water. senior 160-180 160-180 160-180 140-160 140-160
Vacuum actuation, mm of water. Art. 20-25 20-25 20-25 20-25 20-25
Weight kg 5,5 13 22 47 94

The calculation of the number

On the page "calculation of the capacity of the respiratory valve" you can use the interactive tools to identify the required number of equipment.

In this section:


The respiratory valve DPT
the respiratory valve DPT PP with heating
The valve of the respiratory mechanical BM-50
Valves respiratory mechanical CDM-50M
Valves respiratory mechanical BM-200