AYL107-U UPVC, AYL107-U CPVC, AYL107-U PVDF Series Safety Overflow Valve-China top 10 valve Manufacturers, Suppliers, Factory

01. Diameter range：DN15～65
02. Applicable medium:Non frozen liquid, gas, strong acid, strong alkali, and ultra clean medium (also known as back pressure valve)
03. Connection way: Normal adhesive insertion, internal thread, welding (hot melt welding) connection, special flange connection required
04. Opening pressure adjustment range: Normal 0.3～6bar, special 0.3～10bar, 10～16bar
05. Reseating pressure: 85～90% setting pressure, leakage: 0ml/min
06. It must be installed vertically upwards, otherwise there will be setting pressure deviation, and the flow direction of the medium must be

consistent with the arrow direction on the valve body
07. Valve body material: Normal---UPVC(code:U), CPVC(code:U), PPH(code:[P]), SS304(code:B)
Special---PVDF(code:U), FRPP(code:[P ]), PTFE(code:P), SS316(code:R)
08. Diaphragm material: Normal PTFE, special EPDM, VITON
09. Applicable medium temperature:UPVC---Ia:-9～60℃
CPVC/FRPP/PPH---Ib:-9～80℃
PVDF/PTFE/SS304/SS316---Ⅱg:-9～100℃
10. Typical applications: Installed on the positive pressure discharge pipeline of the metering pump to prevent the occurrence of siphonage

and eliminate changes in dosage caused by pressure fluctuations at the dosing point; Used in conjunction with pulse dampers to reduce

damage caused by water hammer to the system, maintain a certain constant pressure from the pump outlet to the overflow valve, and

maintain a constant system flow rate

Component Material Table

Notes:

When the valve body material is PTFE/SS304/SS316, the conventional connection method is internal thread. Except for the valve body material 04, which is the body material, other component materials are the same as in the table above.
◇---diaphragm material, □---nominal diameter.

External Dimension

Notes:

1. ◇---diaphragm material, ■---nominal diameter.
2. The external dimensions of the threaded type are the same as above.

Structure Diagram

Special Configuration

Typical Application Example

Introduction to working principle and coagulant dosing device:
In the water treatment process, coagulation is a key link in the water treatment process. The dosage of coagulant has an appropriate value,and below or above this value cannot achieve the treatment effect. As shown in the above figure, the AYL safety overflow valve is one ofthe indispensable key components in the coagulant dosing device. Quantitative dosing can be achieved by setting the pressure values oftwo AYL safety overflow valves. For example, if the pressure value of AYL safety overflow valve 1 is set to 2.4 bar, and the inlet pressureof AYL safety overflow valve 1 reaches 2.4 bar before adding medicine, and the pressure value of AYL safety overflow valve 2 is set to 2.45 bar, when the inlet pressure of AYL safety overflow valve 2 is higher than 2.45 bar, AYL safety overflow valve 2 opens to relieve pressure, causing the inlet pressure of AYL safety overflow valve 1 to be constant, thereby ensuring a constant dosage of coagulant.