Drazice OKCE 160 NTR Руководство по эксплуатации и установке - Страница 11

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It is necessary to check the safety valve each time before putting it into operation. It is checked

by manual moving of the membrane from the seat, turning the make-and-break device button

always in the direction of the arrow. After being turned, the button must click back into a notch.

Proper function of the make-and-break device results in water draining through the safety valve

outlet pipe. In common operation, such a check needs to be implemented at least once a month,

and after each heater shutdown for more than 5 days. Water may be dripping off the drain pipe

of the safety valve; the pipe must be open into the air, pointed down; environment

temperatures must not drop below zero.

Find necessary pressure values in the below. (Table 4)

Heaters must be provided with a discharge valve mounted on the cold service water inlet to the heater

for potential disassembly or repair. When assembling the security equipment, follow the standard.

Figure 6

SAFETY VALVE

START-UP

PRESSURE

[MPa]

0.6

0.7

Figure 7

ALLOWABLE

MAXIMUM

OPERATING

PRESSURE IN

OVERPRESSURE

COLD WATER

OF WATER

PIPES [MPa]

HEATER [MPa]

0.6

up to 0.48

0.7

up to 0.56

up to 0.8

Table 4

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