ZZDG, ZZDX nitrogen sealing deviceDetailed product description：

ZZDG, ZZDX nitrogen sealing device

Product Features
HANLKA technology relies on the principle of self-reliance to command, operate, and adjust accurately
Micro pressure control continuous setting pressure regulation stable output

Product Overview
The 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: 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 ℃. 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.
Nitrogen supply pressure adjustment: Select a set value such as 1Kpa (100mm. w. c) within the pressure adjustment range of ZZV type micro pressure regulating valve, and adjust the screw to change the pre compression (tension) amount of the spring to achieve it;
Nitrogen release pressure adjustment: In the pressure controller section of the ZZDQ quick release valve, adjust the seat to change the pre compression amount of the spring. 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.
Main component materials
Valve body and cover: HT200, ZG230~450, ZG1Cr18Ni9TI
Valve core and seat: 1Cr18Ni9Ti, Stellite alloy overlay welding
Packing: Polytetrafluoroethylene
Push rod and liner: 2Cr13

Main technical parameters

Nominal diameter DN (mm)

twenty

twenty-five

forty

fifty

eighty

one hundred

one hundred and fifty

Valve seat diameter (mm)

six

fifteen

twenty

twenty-five

thirty-two

forty

fifty

sixty-five

eighty

one hundred

one hundred and twenty-five

one hundred and fifty

Rated flow coefficient KV

three point two

five

eight

ten

twenty

thirty-two

fifty

eighty

one hundred

one hundred and sixty

two hundred and fifty

four hundred

Pressure regulation range Kpa

0.5~7 5~20 15~50 30~150

Nominal pressure PN (MPa)

1.0 1.6

Temperature of the regulated medium (℃)

-20~90

flow characteristics

Quick open

Adjustment accuracy (%)

≤ 3

Effective area of actuator film (cm2)

two hundred

two hundred and eighty

four hundred

Allowable leakage amount

Compliant with ANSI B16.104-1976 Class IV

Dimensions and weight

Nominal diameter (DN)	twenty	twenty-five	thirty-two	forty	fifty	sixty-five	eighty	one hundred	one hundred and twenty-five	one hundred and fifty
Distance between flange end faces (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	four hundred	four hundred and eighty
H	six hundred and ten	six hundred and ten	six hundred and thirty	six hundred and thirty	six hundred and forty	seven hundred and ten	seven hundred and twenty	seven hundred and thirty	eight hundred	nine hundred and thirty
H1	three hundred and thirty	three hundred and thirty	three hundred and fifty	three hundred and fifty	three hundred and sixty	four hundred and thirty	four hundred and forty	four hundred and fifty	five hundred and twenty	six hundred and fifty
φ	three hundred and ten								four 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	two hundred and fifty	two hundred and eighty-five
D 1	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	two hundred and ten	two hundred and forty
D 2	fifty-six	sixty-five	seventy-six	eighty-four	ninety-nine	one hundred and eighteen	one hundred and thirty-two	one hundred and fifty-six	one hundred and eighty-four	two hundred and eleven
n-d	4-14		4-18				8-18			8-22

Ordering Notice 1. Product Model and Name 2. Nominal Diameter DN (mm) 3. Nominal Pressure 4. Temperature Range
5. Valve body material 6. Type of medium 7. Front and rear pressure (pressure difference) of the valve 8. Other special requirements