ZZV self-operated micro-pressure regulating valve
I. Introduction:
The ZZV self-operated micro-pressure regulating valve is a type of valve that does not require external energy. It uses the energy of the controlled medium itself as the power source, introduces it into the actuator diaphragm chamber to generate thrust, and controls the movement of the throttling element to achieve automatic regulation. It is mainly used in various industrial furnace gas combustion systems to control the mixed flow rate of two fuels (fuel A and fuel B) to achieve ideal fuel conditions; used for pressure reduction, pressure stabilization, and pressure relief regulation of hydrogen sealing oil and hydrogen in hydrogen-cooled generator sets, as well as various industrial gases such as liquefied gas, oxygen, and nitrogen; used for gas sealing of various oil product, chemical, and liquid storage tanks, and in some occasions, it can replace the factory's ZZDG nitrogen supply regulating valve and ZZDX nitrogen discharge regulating valve. When the upstream pressure of the valve is low (e.g., less than 0.2MPa), it can replace the factory's ZZYP-(10-16)Ⅱ pilot-operated self-operated pressure regulating valve.
II. Features and Applications:
1. The set value can be adjusted without stopping production;
2. No packing, no friction when the valve stem moves up and down, and the upper seal is absolutely reliable;
3. The sensitive components of the actuator are extremely sensitive, and very small pressure changes can be detected;
4. The valve body is of four-way type, so models K and B can share one valve body.
III. Working Principle:
The self-operated micro-pressure regulating valve relies on the pressure and temperature of the medium flowing through the valve itself as energy to drive the valve to work automatically, without the need for an external power supply or secondary instruments. This type of self-operated regulating valve uses the feedback signals (pressure, differential pressure, temperature) from the valve outlet and transmits them to the actuator through a signal pipe to drive the valve disc to change the opening of the valve, so as to achieve the purpose of regulating pressure, flow rate, and temperature. The self-operated regulating valve is a new type of self-operated regulating valve. Compared with manual regulating valves, its advantage is that it can adjust automatically; compared with electric regulating valves, its advantage is that it does not require external power. Practical applications have proved that in closed circulating water systems (such as hot water heating systems, air conditioning chilled water systems), the correct use of this valve can conveniently realize the flow distribution of the system, achieve dynamic balance of the system, greatly simplify the commissioning work of the system, and stabilize the working state of the pump, etc.
IV. Technical Parameters:
Nominal Diameter DN (mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | |
Rated Flow Coefficient (KV) | ZZCP/ZZVP | 8 | 11 | 20 | 32 | 50 | 80 | 100 | 160 |
ZZCN | 53 | 83 | |||||||
Rated Stroke (mm) | 6 | 8 | 10 | 15 | 20 | ||||
Nominal Pressure PN (MPa) | 0.10, 1.0 | ||||||||
Differential Pressure Regulation Range (KPa) | 0.5～5.5, 5～10, 9～14, 13～19, 18～24, 22～28, 26～33, 31～38, 36～44, 2～51, 49～58, 56～66, 64～78, 76～90, 88～100 | ||||||||
Medium Temperature (℃) | ≤80 | ||||||||
Regulation Accuracy (%) | ≤10 | ||||||||
Allowable Leakage | ZZCP/ZZVP | 10-4 × Rated Capacity of Valve (Class IV) | |||||||
Rate (1/h) | ZZCN | 5 × 10-3 × Rated Capacity of Valve (Class II) | |||||||
| Machinery & Equipment/Valves/Control Valves | |
