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ZZC type self-operating differential pressure valve

ZZC type self-operating differential pressure valve
Stable quality: implement quality monitoring throughout the process, meticulous and comprehensive detection!

Reasonable price: efficient internal cost control, reducing expenses and benefiting customers!

Fast delivery: advanced production lines, sufficient stocking, shortening the delivery time!
Sales: 021-31007323
Fax: 021-333321522
Technology: 021-31007323

product manual Pledge Order process

  Product name :

ZZC type self-operating differential pressure valve

   Product model :

ZZC type

   Driving method :


   Connection form :


   Structure form :


   Sealing material :


   Pressure range :

MPa 1.6 MPa

   Nominal diameter :

-DN100 DN20 -DN100

   Common materials :

Cast steel, stainless steel

   Technical consultation :


是国内著名〖 ZZC型自力式差压阀 〗制造商,也是国内大型【 自力式调节阀 】生产商之一,公司自成立以来始终围绕客户的需求并持续创新,为广大的代理商和企业客户提供〖ZZC型自力式差压阀 〗解决方案,质量可靠,价格实惠,故畅销全国各地,欢迎新老客户来电,来函,我们将为您提供最优质的服务。 Hushan Valve Manufacturing (Shanghai) Co., Ltd. is a well-known domestic manufacturer of ZZC self-operating differential pressure valve and one of the large domestic manufacturers of self-regulating control valves . Since its establishment, the company has always focused on customer needs and continued innovation. To provide the majority of agents and corporate customers with the "ZZC self-operating differential pressure valve" solution, reliable quality and affordable price, so it sells all over the country, welcome new and old customers to call us, email us, we will provide you with the best quality service .

ZZV self-acting micro-pressure regulating valve

ZZC type self-operating differential pressure valve is a type that can automatically adjust the pressure difference of one or two media without external energy, so that the pressure difference is maintained at a constant value. For example, in the industrial furnace gas combustion system, it is used to control A and B. The flow rate of the two fuels is adjusted to achieve the ideal combustion conditions, save fuel and investment, and can also be used for decompression, micropressure, and differential pressure of various industrial gases such as gas, natural gas, liquefied petroleum gas, ammonia, nitrogen, and oxygen. Pressure regulation system. It can also be used in the sealing oil system of hydrogen-cooled generators to control the pressure difference between the sealing oil and hydrogen to ensure reliable sealing.


The micro-pressure valve control valve can replace the ZZYP-16KⅡ self-operating self-regulating valve with pilot operation.     

When the low-pressure end of the differential pressure valve is open to the atmosphere, it becomes a micro-pressure valve (see Figure 2)

The main features of ZZC self-operating differential pressure regulating valve and ZZV self-operating micro-pressure regulating valve are:
1. For single-seat micro (differential) pressure valve, if the pressure in front of the valve is ≥100Kpa, ZZYP type self-operated pressure reduction is installed to ≤100KPa, so it can be used in particularly low pressure situations (such as 0.5KPa).
2. The actuator components are extremely sensitive, and even slight pressure changes will be sensed.
3. The pressure adjustment is very convenient, and the set value can be adjusted without stopping production.




Serial number name material
1 Cover 2Cr13
2 Spring seat 45
3 spring 60Si2Mn
4 tray 1Cr18Ni9Ti
5 Diaphragm Nitrile rubber
6 Small diaphragm Oil resistant rubber
7 Spool PTFE
8 Valve seat 1Cr18Ni9Ti
9 Valve body ZG230-450
Serial number name material
1 Upper valve seat 1Cr18Ni9Ti
2 Lower valve seat 1Cr18Ni9Ti
3 Adjusting disk 2Cr13
4 Spring seat 45
5 Bellows 1Cr18Ni9Ti
6 External cavity of actuator Q235
7 Putter 2Cr13
8 Valve stem 1Cr18Ni9Ti
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
Limited Data
Coefficient Kv
ZZCP / ZZVP 5 8 12.5 20 32 50 80 125
ZZCN      53 83   
Rated stroke (mm)      
Nominal pressure PN (MPa) 0.10 1.0
Differential pressure adjustment range (KPa)
General design range
0.5 ~ 5.5 5 ~ 10 9 ~ 14 13 ~ 19 18 ~ 24
22 ~ 28 26 ~ 33 31 ~ 38 36 ~ 44 42 ~ 51
49 to 58 56 to 66 64 to 78 76 to 90 88 to 100
Medium temperature (℃) ≤80
Adjustment accuracy (%) ≤10
Allowable leakage
(l / h)
ZZCP / ZZVP -4 阀额定容量(Ⅳ级) (GB/T4213-92) 软密封:Ⅵ级 Hard seal 10 -4 rated capacity of valve (class IV) (GB / T4213-92) soft seal: class Ⅵ
ZZCN -4 阀额定容量(Ⅱ级) (GB/T4213-92) 5 10 -4 Valve rated capacity (Class II) (GB / T4213-92)

Note: 1. Nominal pressure of ZZCP / ZZVP is 1.0MPa, ZZCN is 1.6MPa
2. The ZZCN differential pressure adjustment range is 36 ~ 44, 42 ~ 51, 49 ~ 58, 56 ~ 66, 64 ~ 78, 76 ~ 90, 88 ~ 100KPa.

□ Determining the adjustment range of differential (micro) pressure valve

For the segmentation of the differential (micro) pressure adjustment range, see Table 1. The control range (control point) should be selected near the middle period.

□ Determining the way of the whole machine

There are two types of differential (micro) pressure adjustment, B type and K type. The initial position of the B-type valve spool is always open. When the differential (micro) pressure increases, the valve opening degree is reduced or even closed. The K-type valve spool is normally closed at the initial position, and the valve opening degree increases when the differential (micro) pressure increases.

□ Application example

A. Sealed oil system of hydrogen-cooled generator set
B, circulating air volume control of fan heating system
C. Proportional control of two gas flows
D. Pump bypass adjustment



The micro-pressure valve control valve can replace the ZZYP-16KⅡ self-operated pressure regulator with pilot operation.

□ Model establishment instructions

Z: Actuator category; Z: Self-operated series; C: Differential pressure valve: P: Single seat; 10: PN1.0MPa, 16: PN1.6MPa
B: The valve closes when the differential pressure increases, K: The valve opens when the differential pressure increases.
N: Two-seater

V: Micro-pressure valve, K, B control method is the same as ZZYP self-operated product
B: The valve closes when the pressure behind the valve increases
K: Valve opens when pressure before valve increases
N: Two-seater

□ Dimensions and weight

DN 20 25 32 40 50 65 80 100
A 308 394 308 394 308 394 394 394
H ZZCP / ZZVP 376 465 365 445 445 490 490 510
ZZCN      536 536   
L ZZCP / ZZVP 150 160 180 200 230 290 310 350
ZZVN      222 222   
Weight G (Kg) 12 18 25 32 45 58 68 76
Pressure pipe threaded joint M16 1.5

Must be customized when the diameter is greater than 100


□ Ordering Information

Please provide detailed media parameters (pressure before and after the valve, temperature, status), medium name, valve nominal pressure, nominal diameter, detailed diagram of the adjustment system (when system control is more complicated)

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Next Product: ZZY self-operated pressure regulating valve

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