Puhui brand small-diameter brass anti fouling isolation valve, LS21X-16T anti fouling isolation valve product introduction and description

One Internal structure of LS21X-16T small-diameter brass anti fouling block valve product:

Small caliber brass anti fouling isolation valve, The LS21X-16T anti fouling block valve consists of a two-stage check valve system and a drainage and pressure relief system The upper chamber of the drainage and pressure relief system is connected to the inlet end of the first stage check system
The first and second stage check systems of small-diameter brass anti fouling block valves are mainly composed of valve body, inlet joint, valve disc, sealing gasket, spring, etc The drainage and pressure relief system mainly consists of valve cover, diaphragm, valve core, sealing gasket, drainage port, spring, air barrier, etc III Working principle: DF brass anti fouling block valve is a drainage and pressure relief device added to the secondary check system, so that even if the secondary check seal is damaged at the same time, it can still prevent backflow pollution

Overview of Two Small Diameter Brass Anti fouling Block Valve:

　　LS21X-16T Anti fouling Block ValveAn installation device used to prevent backflow pollution in drinking water pipelines, ensuring the hygiene and safety of drinking water Commonly known as small-diameter backflow preventer, made of brass, with a diameter of DN15-DN50. The main body is made of brass material. The import and export are connected by threads, with a minimum diameter of 15mm. The brass anti fouling block valve with a maximum diameter of DN50 is also connected by threads. Anti fouling block valves larger than DN50 usually have cast iron casings.

III The LS21X-16 anti fouling isolation valve works normally in a 3-step cycle for water supply, and its working principle is:

The LS21X-16 anti fouling isolation valve is supplying water normally
1). Clean municipal domestic water is supplied to users from the first level check system through the drain to the outlet of the second level check system. High pressure water enters the upper chamber of the drainage diaphragm at the inlet of each level check system, and the lower chamber of the diaphragm is connected to the outlet of the first level check valve (the inlet of the second level check valve). Due to a certain pressure difference, the valve disc is pushed down, the drain is closed, and the small-diameter brass anti fouling block valve is supplied with water normally
2). When there is no user in the pipeline behind the valve, the water remains still If the import pressure remains constant and there is a pressure difference before and after, the drain will still be in a closed state with a small-diameter brass anti fouling isolation valve
3). When the inlet pressure drops and the pressure difference between the front and rear reaches a certain value, the spring pushes the valve core upwards, and the drain opens to release pressure. When the pressure is released to a certain pressure difference with the inlet pressure, the drain closes again

2. LS21X-16 anti fouling partition valve with double safety seal!

After the LS21X-16 anti fouling isolation valve, the pressure in the pipeline increases beyond the inlet pressure in front of the valve. If the second check valve is sealed properly without leakage, high-pressure water will not flow back. The diaphragm of the drain will maintain the original pressure difference, and the drain will close without pressure relief When the seal of the second stage check valve is damaged and leaks, the pressure before the second stage check valve increases, causing a decrease in the pressure difference between the diaphragm of the drain, opening the drain, and releasing the pressure of the drain; At this time, if the first stage check valve is simultaneously sealed and damaged, the high-pressure water flowing back from the second stage check valve has been depressurized and will not flow back to the first stage check valve
3. If the water supply pressure continues to decrease during the water supply process, the pressure at the upper part of the drain diaphragm will decrease, and the safety drain control spring will push the valve core to open the drain for drainage When the inlet pressure drops to zero or negative pressure, the drain is fully opened, water is discharged, and air enters the vacuum chamber from the drain, thereby preventing siphon backflow. LS21X-16 anti fouling block valve
4 Main performance parameters of LS21X-16 anti fouling block valve:
Use pressure of 1.6MPa; Use clean water as a medium; The medium temperature is less than or equal to 80 degrees; The scope of supply includes small-diameter brass anti fouling isolation valves with a diameter of 15-50mm and large-diameter anti fouling isolation valves with a diameter of 50-600mm

Five Installation requirements for LS21X-16 anti fouling isolation valve:

1. Small caliber brass anti fouling partition valves must be installed horizontally or vertically, and the installation location should be clean with sufficient maintenance space The anti fouling partition valve is equipped with an air barrier, and its outlet must be connected to the drainage pipe network or sewer
2. For testing and maintenance purposes, a ball valve is installed between the drain outlet and the air barrier. During normal operation, the ball valve is in the open position
3. A control valve, filter, and flexible joint should be installed in front of the valve, and a control valve should be installed behind the valve for maintenance

VI Installation location of LS21X-16 anti fouling isolation valve:

1. Install LS21X-16 anti fouling isolation valve at the position behind the water meter connected to the user's water supply pipe network
2. Connect non domestic drinking water and sewage pipes to the domestic water pipeline, and install them at the starting end of the outlet pipe
3. On the inlet pipe of the drinking water tank (when water enters from the bottom of the tank)

When a booster pump is connected in series on the drinking water pipeline, it should be installed on the pump suction pipe with LS21X-16 anti fouling isolation valve. Puhui professional production suppliers provide free installation solutions Serve customers with care

Related articles on LS21X-16 anti fouling isolation valve (search on site): 1. Configuration and use of brass anti fouling isolation valve DN20;

2. Installation requirements for brass anti fouling partition valves;

3. Working principle of brass anti fouling partition valve.