ZZYVP Nitrogen sealing deviceDetailed product description：

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 tank. The nitrogen sealing device consists of two main parts: ZZYP 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 ℃.

ZZYVP nitrogen sealing device parts material:

Part name	material
valve body	ZG230-450 ZG1Cr18i9Ti
Valve stem, valve core, valve seat	1Cr18i9Ti
diaphragm	Nitrile rubber clip reinforced polyester fabric
spring	60Si2Mn
bellows	1Cr18i9Ti

Technical parameters of ZZYVP nitrogen sealing device:

Nominal diameter DN (mm)	twenty	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred
Rated flow coefficient (KV)	eight	eleven	twenty	thirty-two	fifty	eighty	one hundred	one hundred and sixty
Rated stroke (mm)	six	eight		ten		fifteen		twenty
Nominal pressure PN (Mpa)	zero point one zero
Pressure regulation range (KPa)	0.5-5.5, 5-10, 9-14, 13-19, 18-24, 23-28 27-33, 31-38, 36-44, 42-51, 49-58, 56-66
Medium temperature (℃)	≤ 80℃
Adjustment accuracy (%)	± 10
Allowable leakage rate (L/h)	10-4 × rated capacity of valve

ZZYVP nitrogen sealing device external dimensions:

Nominal diameter DN	twenty	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred
A	one hundred and ninety-two			two hundred and thirty-two		three hundred and eight
H	six hundred and twenty-nine	six hundred and thirty-one	six hundred and fifty-two	six hundred and sixty-six	six hundred and eighty-nine	seven hundred and ninety-seven	eight hundred and thirty-seven	one thousand and fifty
L	one hundred and fifty	one hundred and sixty	one hundred and eighty	two hundred	two hundred and thirty	two hundred and ninety	three hundred and ten	three hundred and fifty
G(Kg)	eighteen	nineteen	twenty-one	twenty-three	twenty-five	thirty-seven	fifty	fifty-nine

ZZYVP nitrogen sealing device flange specification: Unit: mm

Nominal diameter DN	twenty	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred
D	one hundred and five	one hundred and fifteen	one hundred and forty	one hundred and fifty	one hundred and sixty-five	one hundred and eighty-five	two hundred	two hundred and twenty
D1	seventy-five	eighty-five	one hundred	one hundred and ten	one hundred and twenty-five	one hundred and forty-five	one hundred and sixty	one hundred and eighty
B	sixteen		eighteen		twenty		twenty-two
n-ф	4-14		4-18				8-18
f1×D2	2×56	3×65	3×76	3×84	3×99	3×118	3×132	3×156

ZZYVP nitrogen sealing device product features:

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

Installation matters of ZZYVP nitrogen sealing device:
(1) Before installation, check whether the parts of the whole machine are damaged or loose, clean the pipelines, and ensure that the flow direction of the medium is consistent with the arrow on the valve body.
(2) For the convenience of on-site maintenance and operation, appropriate space should be left around the valve and a bypass manual valve should be installed. The installation plan for the valve group.
(3) The valve should be installed upright and vertically on a horizontal pipeline, and the valve body should be connected to the pipeline in a coaxial manner. It should be installed in an environment where the ambient temperature does not exceed -25~55 ℃.