Year1
- 材质：
- 铸铁
- 型号：
- ZYF
- 规格：
- DN15-DN350
Product description of self-operated differential pressure control valve
Self-operated differential pressure control valve, also known as differential pressure balance valve, differential pressure regulating valve, differential pressure valve.
This type of self-operated differential pressure control valve does not require external energy. It relies on the pressure change of the medium to be adjusted for automatic adjustment. It automatically eliminates the residual pressure head of the pipe network and the flow changes caused by pressure fluctuations, and maintains a constant user inlet and outlet pressure difference. , helps to stabilize system operation.
The self-operated differential pressure control valve is particularly suitable for household metering or automatic control systems.
Performance characteristics of the self-operated differential pressure control valve
The valve has a double-flap structure, a small unbalanced force on the valve stem, and a compact structure. It is used in the heating (air conditioning) water series to constantly control the system. Pressure difference, and has the following characteristics
, constant pressure difference of the controlled system
, support internal independent adjustment of the controlled system
, absorb fluctuations in external network pressure difference
, adopt advanced The stepless pressure regulating structure can control the pressure difference with an adjustable ratio up to
, and has the function of automatically eliminating blockage
. The flange size conforms to the gray cast iron flange size.
How to use the self-operated differential pressure control valve
The direction of medium flow should be consistent with the direction of the arrow on the valve body
The self-operated differential pressure control valve should be installed on the return pipe, and the valve should be connected to the pilot Pressure pipe, the other end of the pressure guide pipe is connected to the water supply pipe. It is recommended to install a ball valve at the water supply end of the pressure guide pipe to start the clogging elimination function
. A filter should be installed on the water supply pipe in front of the pressure guide pipe to avoid The water quality is too poor, causing the valve to lose its automatic adjustment function
. The water supply pipe and the return pipe in front of the valve should be equipped with pressure gauges to facilitate adjustment and control of the pressure difference
. If the flow rate of the system is found to be too large or too high, Small, the possible reason is that debris during the installation of pipeline components is stuck on the valve plug. You can close the ball valve for a few minutes. At this time, if the blockage is minor, it can be automatically eliminated. If it cannot be eliminated, the valve must be disassembled. Check and eliminate blockages
, control the pressure difference adjustment method, adjust the pressure regulating valve stem counterclockwise, and observe the pressure difference.
Materials and lifespan of self-operated differential pressure control valve
Valve body of high quality gray cast iron
Internal parts brass, stainless steel
Spring stainless steel
Diaphragm EPDM
br/> Life span of more than ten years
Technical parameters of self-operated differential pressure control valve
, nominal pressure
, medium temperature °C
, working pressure difference rangebr/>, control pressure Adjustable range of differential setting value and pressure differencebr/>, length of pressure guide pipe
, size of pressure guide pipe connection end/pipe thread
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