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ZZDX-16K type nitrogen release valve
ZZDX-16K type nitrogen release valve
Product details
Product Introduction
ZZDQThe nitrogen sealing device is a self operated micro pressure control system independently developed and researched by our factory, mainly used to maintain the protective gas at the top of the container(Usually nitrogen gas)The pressure is constant to avoid direct contact between the materials inside the container and air, prevent material evaporation, oxidation, and ensure the safety of the container. Specially suitable for gas seal protection systems of various large storage tanks. This product has the characteristics of energy saving, sensitive action, reliable operation, and convenient operation and maintenance. Widely used in industries such as petroleum and chemical.
Product Features
· Without the need for external energy, it can work in situations without electricity or gas, which is both convenient and energy-saving, reducing costs;·The nitrogen sealing device is easy to set for nitrogen supply and release pressure, and can be operated under continuous production conditions;·The effective area of the pressure detection diaphragm is large, the set spring stiffness is small, the action is sensitive, and the device works smoothly;·Adopting a non packing design, the valve stem experiences minimal friction, responds quickly, and has high control accuracy;·The nitrogen supply device is operated by a commander, and the pressure reduction ratio can reach100:1Good decompression effect and high control accuracy;·To ensure the safety of the storage tank, a breathing valve should be installed on the top of the tank;·The breathing valve only serves a safety purpose, avoiding the defect of frequent opening and closing and easy damage in conventional nitrogen sealing devices.Structure and Working Principle
The nitrogen sealing device is composed of a nitrogen supply device(See Figure 1)And nitrogen release device(See Figure 2)Composed of two parts. The nitrogen supply device consists of a commander and a main valve; The nitrogen release device consists of a pressure open micro pressure regulating valve with internal feedback. The nitrogen pressure is generally set to100mmH20Accurate control through nitrogen sealing device. When the inlet valve of the storage tank is opened and materials are added to the tank, the liquid level rises, the volume of the gas phase decreases, and the pressure increases. When the pressure inside the tank rises above the set pressure of the nitrogen release device, the nitrogen release device opens and releases nitrogen gas to the outside, causing the pressure inside the tank to decrease. When the pressure drops to the set pressure of the nitrogen release device, the nitrogen release device automatically closes. When the outlet valve of the storage tank is opened and the user releases the material, the liquid level drops, the volume of the gas phase increases, the pressure inside the tank decreases, and the nitrogen supply device is turned onInject nitrogen into the storage tank to increase the pressure inside the tank. When the pressure inside the tank rises to the point where the nitrogen supply device automatically shuts off.
Working principle of nitrogen supply device
Structure of nitrogen supply device(See Figure 4)Introduce the medium from the pressure point located on the top of the tank into the detection mechanism through a pressure conduit(7)The medium generates a force on the detection element that interacts with the spring(8)Balance the pre tightening force. When the pressure inside the tank drops below the set point of the nitrogen supply device pressure, the balance is disrupted, causing the commander valve core to malfunction(6)Open and allow the gas in front of the valve to pass through the pressure reducing valve(5)Throttle valve(4)Enter the main valve actuator(3)Upper and lower membrane chambers, open the main valve core(2)Fill the tank with nitrogen gas; When the pressure inside the tank rises to the set point of the nitrogen supply device pressure, due to the preset spring force, the controller valve core is closed(6)Due to the spring action in the main valve actuator, the main valve is closed and nitrogen supply is stopped.
Working principle of nitrogen release device
Structure of nitrogen release device(See Figure 5)The device adopts an internal feedback structure, and the medium directly enters the detection mechanism through the valve cover(2)The medium generates a force on the detection element and a preset spring(3)The pre tightening force is balanced. When the pressure inside the tank rises above the pressure set point of the nitrogen release device, the balance is disrupted, causing the valve core to malfunction(1)Move up, open the valve, and release nitrogen gas to the outside; When the pressure inside the tank drops to the set point of the nitrogen release device, the valve is closed due to the preset spring force. explain·The general nitrogen supply pressure is3×105～10×105Pabetween;·The breathing valve on the top of the tank only serves a safety purpose and does not work under normal circumstances when the main valve fails, causing the pressure inside the tank to be too high or too low;·The nitrogen release valve is installed on the top of the tank, and its diameter is generally the same as that of the inlet valve;·The pressure setting point of the general nitrogen release valve is slightly higher than that of the nitrogen supply valve to avoid frequent operation of the nitrogen supply and release devices, waste of nitrogen gas, and affecting the service life of the equipment. *If there are any discrepancies between the user's operating conditions and the selection manual, please contact our technical development department by phone to negotiate a solution.
Main technical parameters and performance indicators
1.Main technical parameters and performance indicators of nitrogen supply device
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Nominal diameterDN(mm)
|
25
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32
|
40
|
50
|
65
|
80
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100
|
||||||||
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Valve seat diameterdn(mm)
|
5
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6
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7
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8
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10
|
12
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15
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20
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25
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32
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40
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50
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65
|
80
|
100
|
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Rated flow coefficientKv
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0.2
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0.32
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0.5
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0.8
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1.8
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2.8
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4.4
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6.9
|
11
|
20
|
30
|
48
|
75
|
120
|
190
|
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Rated travelL(mm)
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8
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10
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14
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20
|
25
|
||||||||||
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Traffic characteristics
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Hurry up
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||||||||||||||
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Pressure regulation range(kPa)
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0.4～5.5、5～10、9～14、13～19、18～24、22～28、27～33、31～38、36～44、42～51、49～58、56～66
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||||||||||||||
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Nominal pressurePN(MPa)
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1.6 2.5 4.0
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||||||||||||||
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Temperature of the regulated medium(℃)
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≤80
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||||||||||||||
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Adjustment accuracy(％)
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±5％
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||||||||||||||
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Allowable leakage level
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Standard level:Ⅳlevel(GB/T4213-92)Tight type:Ⅵlevel(GB/T4213-92)
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||||||||||||||
2.Main technical parameters and performance indicators of nitrogen release device
|
Nominal diameterDN(mm)
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
|
Rated flow coefficientKv
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6.9
|
11
|
20
|
30
|
48
|
75
|
120
|
190
|
|
Rated travelL(mm)
|
8
|
10
|
14
|
20
|
25
|
|||
|
Traffic characteristics
|
Hurry up
|
|||||||
|
Pressure regulation range(kPa)
|
0.4～5.5、5～10、9～14、13～19、18～24、22～28、27～33、31～38、36～44、42～51、49～58、56～66
|
|||||||
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Nominal pressurePN(MPa)
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0.1
|
|||||||
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Temperature of the regulated medium(℃)
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≤80
|
|||||||
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Adjustment accuracy(％)
|
±5％
|
|||||||
|
Allowable leakage level
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Standard level:Ⅳlevel(GB/T4213-92)Tight type:Ⅵlevel(GB/T4213-92)
|
|||||||
Main component materials
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Valve body:ZG230-450、ZG1Cr18Ni9Ti
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Valve components:1Cr18Ni9Ti
|
|
Membrane cover:A3、1Cr18Ni9Ti
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Diaphragm: clip reinforced polyester fabric, nitrile rubber, fluororubber
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|
Spring:60Si2Mn、1Cr18Ni9Ti
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|
※According to user requirements, other grades of materials can be used for the valve body, valve internals, and diaphragm cover.
External dimensions and weight 1.Dimensions and weight of nitrogen supply device
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Nominal diameterDN(mm)
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
|
L
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
|
A
|
308
|
308
|
308
|
308
|
394
|
394
|
394
|
|
H2
|
415
|
415
|
415
|
415
|
415
|
415
|
415
|
|
H1
|
60
|
75
|
80
|
85
|
95
|
105
|
120
|
|
H
|
720
|
730
|
730
|
750
|
790
|
840
|
890
|
|
weight(kg)
|
32
|
35
|
40
|
50
|
90
|
115
|
280
|
2.Dimensions and weight of nitrogen release device
|
Nominal diameterDN(mm)
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
|
L
|
160
|
180
|
200
|
230
|
290
|
310
|
350
|
|
A
|
308
|
308
|
308
|
308
|
394
|
394
|
394
|
|
H1
|
60
|
75
|
80
|
85
|
95
|
105
|
120
|
|
H
|
380
|
400
|
420
|
430
|
550
|
560
|
570
|
|
weight(kg)
|
12
|
13
|
15
|
17
|
20
|
28
|
38
|
Connection size and standard·
Connection method: flange, thread·Distance between flange end faces:GB12221-89 ·Flange standard:GB/T9113-2000 ·Flange type:RF ·Execution mechanism gas signal interface:M16×1.5Note: The above data can be processed and manufactured according to user needs.
ZZDQDescription of Model Compilation for Nitrogen Sealing DeviceZZDGDescription of Model Compilation for Nitrogen Supply DeviceZZDXDescription of Model Compilation for Nitrogen Discharge DevicesExample: The model is:025x015ZZDG16S0.5～5.5-1PIndicate nominal diameter(DN)by25mm, valve seat diameter(dg)by15mmNominal pressure(PN)by1.6MPaAccording to the manufacturer's standard, the range of the pressure regulating valve for connecting flanges is0.5～5kPaThe nitrogen supply pressure is1kPaThe valve body material isZG1Cr18Ni9TiA set of nitrogen supply equipment; The model is:040ZZDX1.0S0.5～5.5-1.5PIndicate nominal diameter(DN)by40mmNominal pressure(PN)by0.1MPaAccording to the manufacturer's standard, the range of the pressure regulating valve for connecting flanges is0.5～5kPaThe nitrogen release pressure is1.5kPaThe valve body material isZG1Cr18Ni9TiA set of nitrogen release devices.
Ordering Notice
1.Device name and model 2.Nominal diameter of nitrogen supply and discharge devicesDN(mm) 3.Nominal pressure of nitrogen supply and discharge devicesPN(MPa) 4.Rated flow coefficient of nitrogen supply and discharge devicesKv 5.Inherent flow characteristics of nitrogen supply and discharge devices 6.Pressure set points for nitrogen supply and release devices 7.Media name 8.Work pressure and adjustment range 9.Valve body, valve internals, and packing materials 10.Other special requirements
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