How to maintain the German FESTO pressure reducing valve

What are the information on how to maintain the German FESTO pressure reducing valve?

The German FESTO pressure reducing valve setting requirements should be the same as the cold water project; the hot water supply project using the riser circulation mode (full circulation mode), the pressure reducing valve setting should prevent the destruction of the hot water circulation, and the pressure of the return pipes at each meeting should be at the junction point. balance.
When the nominal German FESTO pressure reducing valve has a nominal diameter of not more than 50mm, a linear pressure reducing valve should be used; when it is larger than 50mm and less than 100mm, a pilot type pressure reducing valve should be used.
The hot water supply project using the dry pipe main circulation mode (semi-circulation mode), the pressure relief valve setting requirements should be the same as the cold water project; the hot water supply project using the riser circulation mode (full circulation mode), the pressure reducing valve setting should be To prevent the destruction of the hot water circulation, the pressure of the return pipes at each junction should be balanced at the meeting point.
Change of piston adjustable pressure reducing valve
In the case of the main valve unchanged, through the needle valve, the pilot valve and the corresponding control system, according to the different requirements of the pipe network, dozens of functions of the valve can be evolved, in addition to the above five kinds of water supply systems commonly used Electric float valve, hydraulic electric control valve, electromagnetic control valve, flow control valve, emergency shut-off valve, etc. There are different design selection requirements and installation requirements.
Because the water control valve uses the pressure of the medium itself and the hydraulic system to operate, and can be automatically controlled, accurate in operation and reliable in performance, it is widely used in building water supply (including fire protection) systems. The design selection and installation points of several commonly used hydraulic control valves, such as remote control float valve, adjustable pressure reducing valve, slow closing check valve, pressure relief valve and pressure holding valve, are introduced.
The adjustable pressure reducing valve is a kind of regulating the pressure of the pipeline by using the energy of the medium itself. By adjusting the pressure reducing pilot valve, the outlet pressure of the main valve is controlled, the outlet pressure is not changed by the change of the inlet pressure, and the water consumption of the outlet is not affected. Changes in the exchange pressure. The sealing performance is reliable, and the installation, maintenance, debugging, and inspection are convenient, and the service life is long.
Germany FESTO pressure reducing valve is divided into cast steel valve, stainless steel valve, chrome molybdenum steel valve, chrome molybdenum vanadium steel valve, double phase steel valve, non-standard custom valve material. Germany FESTO pressure reducing valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. So, how should it be maintained during the long-term use of the valve?

1. It is forbidden to use long lever or long wrench wrench wheel when opening or closing the valve.

2. For valves installed outdoors, a protective cover shall be provided on the valve stem to protect it from rain, snow and dust.

3. The spare valve should be placed in a dry place indoors, and the interface should be sealed with wax cardboard or plug to prevent dirt from entering.

4. The stem thread often rubs against the stem nut. It should maintain a certain amount of oil at the screw and play a lubricating role to ensure the valve stem is free to move and flexible. When the valve is mechanically driven, it is necessary to apply the gearbox additive in time to prevent biting.

5. For long-term open valves, there may be dirt on the sealing surface; when closing, the valve can be gently closed and then opened a little, so that the high-speed flowing medium can be used to wash away the dirt and then close.

6. The valve should be cleaned and inspected frequently to keep the valve parts clean and complete. Do not place heavy objects on the valve, and should not stand on the valve.

7. Before opening the steam valve, the clean water in the system must be removed first, then the valve should be opened slowly to avoid the impact of steam and water; when the valve is fully open, the handwheel should be reversed a little.