Precautions for selecting MAC solenoid valves

Precautions for selecting MAC solenoid valves

1： The fluid in the applicable pipeline must match the medium calibrated in the selected MAC solenoid valve series model. The temperature of the fluid must be lower than the calibration temperature of the selected MAC solenoid valve. MAC solenoid valves allow liquid viscosity to generally be below 20CST, and if it exceeds 20CST, it should be noted. When the working pressure difference is less than 0.04MPa, direct acting and step-by-step direct acting types such as ZS, 2W, ZQDF, ZCM series should be selected for the pipeline; When the minimum working pressure difference is greater than 0.04MPa, a pilot operated (differential pressure) MAC solenoid valve can be selected; The maximum working pressure difference should be less than the maximum calibration pressure of the MAC solenoid valve; Generally, MAC solenoid valves work in a one-way manner, so attention should be paid to whether there is a reverse pressure difference, and if a check valve is installed. When the fluid cleanliness is not high, a filter should be installed in front of the MAC solenoid valve. Generally, MAC solenoid valves require good cleanliness of the medium. Pay attention to the flow aperture and pipe diameter; MAC solenoid valves are generally only controlled by a switch with two positions; If conditions permit, please install a bypass pipe for easy maintenance; When there is water hammer phenomenon, it is necessary to customize the opening and closing time adjustment of the MAC solenoid valve. Attention should be paid to the impact of environmental temperature on MAC solenoid valves. The power supply current and power consumption should be selected according to the output capacity, and the power supply voltage is generally allowed to be around ± 10%. It is necessary to pay attention to the high VA value during AC starting.

2、 Reliable MAC solenoid valve

MAC solenoid valves are divided into two types: normally closed and normally open; Generally, the normally closed type is selected, which opens when powered on and closes when powered off; But when the opening time is long and the closing time is short, the normally open type should be selected. Life testing is generally a type testing project in factories, and to be precise, there is no professional standard for MAC solenoid valves in China. Therefore, when selecting MAC solenoid valve manufacturers, caution should be exercised. When the action time is short and the frequency is high, the direct action type is generally selected, and the fast series is selected for large caliber.

3、 Generally, MAC solenoid valves are not waterproof in terms of safety. If conditions do not permit, please choose waterproof types, which can be customized by the factory. The maximum nominal pressure of the MAC solenoid valve must exceed the maximum pressure in the pipeline, otherwise the service life will be shortened or other unexpected situations may occur. For corrosive liquids, all stainless steel type should be selected, and for highly corrosive fluids, Plastic King (MAC solenoid valve) should be selected

SLF) MAC solenoid valve. Explosive environments require the use of corresponding explosion-proof products.

4、 There are many MAC solenoid valves that can be used universally in terms of economy, but products should be selected based on meeting the above three points.

MAC manual valves in the United States are divided by driving mode:

(1) Automatic valve refers to a valve that does not require external force to drive, but relies on the energy of the medium itself to make the valve operate. Such as safety valves, pressure reducing valves, drain valves, check valves, automatic regulating valves, etc.

(2) Power driven valve: Power driven valves can be driven by various power sources.

Electric valve: a valve driven by electricity.

Pneumatic valve: a valve driven by compressed air.

Hydraulic valve: a valve driven by the pressure of oil or other liquids.

In addition, there are combinations of the above driving methods, such as pneumatic electric valves.

(3) Manual valve: This wheel or worm gear reducer can be installed between the handwheel and the valve stem. When necessary, universal joints and transmission shafts can also be used for remote operation.

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