The ZZYVP nitrogen sealing device is mainly used for constant control of nitrogen pressure at the top of the storage tank to protect the materials inside the tank from nitriding and ensure the safety of the storage tank. The nitrogen sealing device consists of two main parts: ZZDQ quick release valve and ZZV micro pressure regulating valve. The quick release valve consists of a pressure controller and a ZMQ-16K single seat shut-off valve. When the pressure inside the storage tank rises to the set pressure, the quick release valve quickly opens to release excess pressure inside the tank. When the pressure inside the storage tank decreases, the micro pressure regulating valve opens and fills the tank with nitrogen gas. As the micro pressure regulating valve must be used at a pressure below 0.1Mpa and the on-site pressure is high, ZZYP type pressure regulating valve must be installed to reduce the pressure to below 0.1Mpa before it can be used. The nominal pressure is 0.1Mpa, and the pressure can be set in sections from 0.5Kpa to below 66Kpa. The medium temperature is ≤ 80 ℃.

characteristic

1. The nitrogen sealing device is convenient for setting the supply (discharge) nitrogen pressure and can be operated under continuous production conditions;

2. The nitrogen pressure setting range is wide, ranging from as low as 0.5Kpa (50mm. w. c) to as high as Kpa, with a ratio of 132 times. The effective area of the pressure detection diaphragm is large, the set spring stiffness is small, and the action is extremely sensitive.

3. Adjustment:

(1) Nitrogen supply pressure adjustment: Select a set value within the pressure adjustment range of ZZV type micro pressure regulating valve, such as 1Kpa (100mm. w. c), and adjust screw 2 to change the pre compression (tension) amount of spring 3 to achieve it;

(2) Nitrogen release pressure adjustment: In the pressure controller section of the ZZDQ quick release valve, adjust seat 3 to change the pre compression amount of spring 4. Generally, to avoid frequent opening and closing of nitrogen sealing devices, the nitrogen release setting value should be far away from the nitrogen supply pressure value, such as 2Kpa (200mm. w. c);

(3) Adjustment of high set value of breathing valve: After adjusting the above two set values, in order to avoid frequent opening and closing of the breathing valve, the set value of the breathing valve should be greater than the pressure relief set value.

Part Material

Main technical parametersIntroduction to external dimensions

Flange specification unit: mm