Puhui brand ZYC type self operated differential pressure control valve

ZYC type self operated differential pressure control valve product introduction:

ZYC type (zyf17) seriesSelf operated differential pressure control valveIt is a hydraulic balancing valve with automatic constant pressure difference, applied in water systems such as centralized heating and central air conditioning, which is conducive to the autonomous adjustment of various users and end devices of the controlled system, especially suitable for household metering heating systems and variable flow air conditioning systems. Self operated differential pressure control valve models: ZYC47, zyf. Principle of self operated differential pressure control valve: Divided into two independent chambers by a diaphragm, the controller uses a spring to achieve automatic differential pressure control. {Puhui card}. Applied in water systems such as centralized heating and central air conditioning.

Working principle of self operated differential pressure control valve

The self operated differential pressure control valve is installed on the return pipe and user inlet. The copper pipe configured for the valve is a pressure guiding pipe and needs to be connected to the inlet water supply pipeline. The upper valve chamber P1 in the structural diagram above represents the water supply pressure, P2 represents the return water pressure inside the valve, and P3 represents the return water pressure outside the valve. From the structural diagram, it can be seen that the top is the conduit joint, the bottom is the upper valve chamber diaphragm, the middle of the two valve discs is P2, and the lower part is the adjusting spring.
When the pressure difference △ Pi (△ Pi=P1-P2) in the valve system is set to the valve pressure difference setting value, the pressure P1 and P2 in the lower diaphragm chamber of the valve are balanced with the thrust generated by the compression deformation of the spring, thereby determining the flow cross-sectional area A and flow coefficient of the fluid passing through the valve. When the flow rate changes, the balance of the above forces causes the flow cross-sectional area and flow coefficient of the valve to change, but △ P1 remains unchanged.

Working principle and structural design of self operated differential pressure control valve

The self-supporting differential pressure control valve is a dual channel design that can adjust the flow resistance. The automatic pressure control valve is separated into two independent chamber controllers by a diaphragm, with one chamber connected to the return water pipeline. When installed on the return pipe. The channel is a self-supporting differential pressure control valve actuator, whose force of action comes from the pressure difference between the supply pressure P1 and the return pressure P2. The controller is a differential pressure comparator, which is selected based on the resistance of the controlled heating system. The spring on the return side is used to balance the pressure difference between the supply and return water. When some users control the heating system to adjust the room temperature, the resistance increases or decreases, which will cause changes in the circulating flow until the pressure of the diaphragms on both sides is balanced, resulting in the internal automatic adjustment control system.

Selection of specifications and diameters for self operated differential pressure control valves

When selecting a self-supporting differential pressure control valve, try to choose a diameter of the same size as the pipeline. If the required flow rate is too low, consider choosing a slightly smaller diameter. The self-supporting differential pressure control valve conduit is connected to 1/2 pipe thread, and the guide pipe length is 1. About 5 meters, connect the pipeline. This type of valve is divided into fixed and adjustable differential pressure types. Nominal pressure: 1. 6 MPA， Medium temperature 0-120 ℃. Product model: ZYC series or ZYF.

Common parameters for ZYC self operated differential pressure control valve

1. Pressure rating: 1.0MPa, 1.6MPa, 2.5MPa;
2. Specification caliber: 15mm-50mm threaded connection, main body material brass; 40-400mm flange connection, main body material cast iron. (The specifications written here correspond directly to the inner diameter of the pipeline.)
3. Medium: Water; Temperature range: 0-120 degrees.
4. Main body material: 5mm -50mm threaded brass connected to the main body; Main body cast iron with 40-400mm flange connection.

specifications	Length between flanges	Total height of valve body	From the center of the flange to the lower end
DN32	199	124	71
DN40	199	124	71
DN50	207	125	53
DN65	215	141	60
DN80	255	177	78
DN100	280	199	85
DN125	287	200	113
DN150	356	270	136
DN200	410	315	162
DN250	458	353	180
DN300	526	421	213

Brass self-supporting differential pressure control valve threaded connection

The following picture shows a self-supporting differential pressure control valve made of brass material, with a small diameter connected by threaded threads. The left picture shows the appearance of the products currently supplied, and the right picture shows the old style before 2014. If there are no special requirements during shipment, the delivery will be for the new model. If there is a special need for the old model, it must be specified when ordering.

What are the performance and characteristics of ZYC type self operated differential pressure control valve

1. The differential pressure control valves for water supply (G) and return (H) must be installed separately on the water supply pipe and return pipe;
2. Control the pressure difference accuracy to ± 7.5%;
3. With no loss of control accuracy, the adjustable pressure difference type has a pressure regulation ratio of up to 16:1;
4. Valve body material: gray cast iron, carbon cast steel, forged copper alloy;
5. The connecting end of the pressure pipe has a 1/2 "pipe thread, and the length of the pressure pipe is 1.5m;
6. Support autonomous adjustment within the controlled system;
7. Eliminate the impact of external network voltage fluctuations on the controlled system;
8. It is divided into two types: fixed pressure difference type and adjustable pressure difference type.

Key installation points for self operated differential pressure control valve ZY47

1. Self operated differential pressure control valves are divided into three types: supply type, return type, and bypass type. Generally installed on the return pipe, the pressure pipe on the valve is connected to the supply pipe; Water supply pipe installation can also be used, but it cannot be interchanged. The bypass type self operated differential pressure control valve is in a closed state within the rated differential pressure range.

2. Self operated differential pressure control valves can be installed horizontally or vertically.

3. The size of the pressure pipe connector is generally 1/2 "pipe thread, and a variable diameter pipe joint or welded pipe joint should be installed on the water supply pipe during installation.

4. The adjustable self operated differential pressure control valve has a knob for adjusting the differential pressure, which can increase or decrease the set value of the differential pressure.

5. The installation position should be set with straight pipe sections according to the product manual requirements.

Before installing the self operated differential pressure control valve, a GL41HY filter was also installed in front of the valve to prevent blockage. If it is confirmed that the water quality is clean enough, filters need not be installed.

Puhui Valve Brand, ZYC Self operated Differential Pressure Control Valve Boutique, provides free installation solutions. Looking forward to your call: 0317-8294124. The self operated differential pressure control valve can guarantee delivery within three days to first level provinces: Beijing, Tianjin, Hebei Province, Shandong, Henan, Jiangsu, Liaoning, Inner Mongolia Autonomous Region, Shanxi, Anhui, Gansu, Guangdong, Heilongjiang, Jilin, Ningxia, Shaanxi, Shanghai, Sichuan, Hubei, Hunan, Jiangxi, and Zhejiang.
ZYC self operated differential pressure control valve can guarantee delivery within 5 days to provinces: Xinjiang, Yunnan, Guizhou, Fujian, Guangxi, Hainan, Qinghai...... For other provinces and regions not listed, the latest delivery time is 7 days! Product standard packaging, convenient and safe transportation! Rational packaging that facilitates loading and unloading turnover, ensuring product integrity and powerful packaging!

Online inquiry

Contacts
Company
Telephone
Email
WeChat
Verification Code
Message Content