The 215V type self-operated differential pressure valve is a type of valve that can automatically adjust the pressure difference of one or two media without the need for external energy to maintain a constant pressure difference.
For example, in the gas combustion system of industrial furnaces, it is used to control the mixing ratio and flow rate of A and B fuels, achieve ideal combustion conditions, save fuel and investment, and can also be used as a pressure reducer, micro pressure regulator for various industrial gases such as gas, natural gas, liquefied petroleum gas, ammonia, nitrogen, oxygen, etc In the differential pressure regulation system. It can also be used in the sealing oil system of hydrogen-cooled generator units to control the pressure difference between the sealing oil and hydrogen gas to ensure reliable sealing.
The micro pressure valve can replace the 214K type self-operated pressure regulating valve with a command when controlling the front of the valve.
When the low-pressure end of the differential pressure valve is opened to the atmosphere, it becomes a micro pressure valve (see Figure 2). The main characteristics of the 213 type self-operated differential pressure regulating valve and the 212 type self-operated micro pressure regulating valve are:
1. For single-seat micro (differential) pressure valves, if the pressure in front of the valve is ≥ 100KPa, install the 3001P self-operated type to reduce the pressure to ≤ 100KPa, so it can be used in particularly low-pressure situations (such as 0.5KPa)
2. The actuator components are extremely sensitive, and extremely small pressure changes can be sensed.
3. The pressure adjustment is extremely convenient, and the set value can be adjusted without stopping production.
 |
 |
||||
| No. | Name | Material quality | No. | Name | Material quality |
| 1 | Cover | 2Cr13 | 1 | Upper valve seat | 1Cr18Ni9Ti |
| 2 | Spring seat | 45 | 2 | Lower valve seat | 1Cr18Ni9Ti |
| 3 | Spring | 60Si2Mn | 3 | Adjusting disc | 2Cr13 |
| 4 | Tray | 16Cr18Ni9Ti | 4 | Spring seat | 45 |
| 5 | Diaphragm | Nitrile rubber | 5 | Corrugated pipe | 1Cr18Ni9Ti |
| 6 | Small diaphragm | Oil-resistant rubber | 6 | Outer chamber of actuator | Q235 |
| 7 | Spool | PTFE 1Cr18Ni9Ti |
7 | Push rod | 2Cr13 |
| 8 | Valve seat | ZG230-450 | 8 | Valve stem | 1Cr18Ni9Ti |
| 9 | Valve body | ZG1Cr18Ni9Ti | 9 | Spool | 1Cr18Ni9Ti |
| 10 | Valve body | ZG230-450 | |||
| Main technical parameters and performance indicators (Table 1) | |||||||||
| Nominal Diameter DN (mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | |
| Rated flow coefficient Kv | ZZCP/ZZVP | 5 | 8 | 12.5 | 20 | 32 | 50 | 80 | 125 |
| ZZCN | - | - |
- |
- |
53 | 83 | - |
- | |
| Rated stroke (mm) | 5 | 6 | 10 | 15 | 20 | ||||
| Nominal pressure PN(Mpa) | 0.10 1.0 | ||||||||
| Differential pressure adjustment range (kPa) General design scope |
0.5~5.5 5~10 9~14 13~19 18~24 22~28 26~33 31~38 36~44 42~51 49~59 56~66 64~78 76~90 88~100 |
||||||||
| Medium temperature (℃) | ≤80 | ||||||||
| Adjustment accuracy (%) | ≤10 | ||||||||
| Permissible leakage (I/h) | ZZCP/ZZVP | Hard seal 10 x valve Nameplate capacity (Class IV) (GB/T4213-2008) | |||||||
| Soft sealing: Class VI | |||||||||
| ZZCN | 5×10 x valve Nameplate capacity (Class III) (GB/T 4213-2008) | ||||||||
Determination of the adjustment range of differential (micro) pressure valve
The segmentation of the differential (micro) pressure adjustment range is shown in Table 1.
The scope of the control room (control points) should be selected in the interim attachment.
Determination of the operation mode of the entire machine
There are two types of differential (micro) pressure regulating valves: B-type and K-type. The initial position of the B-type valve core is usually open, and the opening decreases or even closes when the differential (micro) pressure increases. The initial position of the K-type valve core is usually closed, and the valve opening increases when the differential (micro) pressure increases.
Application examples
A. Sealing oil system of hydrogen-cooled generator unit
B. Fan heating system circulating air volume control machine
C. Proportional control of two gas flow rates
D. Pump bypass regulation
Application examples
215V-10B 215V-10K
2: Self-operated product series
1: Thin film actuator
2: Micro pressure products
1: Single seat structure
2: Cage structure
4: Double seat structure
10: PN1.0MPa
B: Pressure (differential pressure) increases; valve closed
K: Pressure (differential pressure) increases; valve opens
| DN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | |
| A | 308 | 394 | 308 | 394 | 308 | 394 | 394 | 394 | |
| H | ZZCP/ZZVP | 376 | 465 | 365 | 445 | 448 | 490 | 490 | 510 |
| ZZCN | - | - | - | - | 536 | 536 | - | - | |
| L | ZZCP/ZZVP | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 |
| ZZVN | - | - | - | - | 220 | 222 | - | - | |
| Weight (Kg) | 12 | 18 | 25 | 32 | 45 | 58 | 68 | 76 | |
| Pressure pipe threaded joint | M16×1.5 | ||||||||
Ordering Instructions
Please provide detailed medium parameters (pressure, temperature, status before and after the valve), medium name, valve nominal pressure, nominal diameter, and a detailed diagram of the regulating system (when the system control is complex).
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean euismod bibendum laoreet. Proin gravida dolor sit amet lacus accumsan et viverra justo commodo. Proin sodales pulvinar sic tempor. Sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Nam fermentum, nulla luctus pharetra vulputate, felis tellus mollis orci, sed rhoncus pronin sapien nunc accuan eget.
Fields marked with * are required.
