The following matters should be noted in the installation and maintenance of the butterfly valve:
1. When installing, the valve flap should be stopped at the closed position.
2. The opening position should be determined according to the rotation angle of the disc.
3. Butterfly valve with bypass valve, open the bypass valve before opening.
4. It should be installed according to the installation instructions of the manufacturer. The heavy butterfly valve should be provided with a solid foundation.
The advantages of the butterfly valve are as follows:
1. It is convenient and quick to open and close, labor saving, small fluid resistance, and can be operated frequently.
2. Simple structure, small size and light weight.
3, can transport mud, less liquid in the pipe mouth.
4, under low pressure, can achieve a good seal.
5, the adjustment performance is good.
The disadvantages of the butterfly valve are as follows:
1. The use pressure and working temperature range are small.
2. Poor sealing.
The butterfly valve can be divided into a bias plate type, a vertical plate type, a slant plate type and a lever type according to the structure. According to the sealing form, it can be divided into two types: a relatively sealed type and a hard sealed type. The soft seal type is generally sealed with a rubber ring, and the hard seal type is usually sealed with a metal ring.
According to the connection type, it can be divided into flange connection and clip type connection; according to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic and electric.
Convenience Food
means that it can be prefabricated, or it can be eaten now. The food is
made into semi-finished products or finished products, and then frozen.
It can be easily processed at any time and can be eaten anytime and
anywhere.
Features of convenience food:
1. Easy to eat and easy to carry. Convenience
foods are packed in specifications and are easy to carry. They are easy
to process when they are eaten. They only need to be rehydrated, thawed
or heated slightly to save time and effort.
2, nutritious, health and safety. Convenience
foods are processed with reasonable ingredients and foods, and undergo
strict sanitary inspection, sterilization and packaging, so the
nutrition is rich, safe and reliable.
3. Low cost and low price. Convenience
foods use large-scale industrialized centralized production, which can
make full use of food resources and achieve comprehensive utilization,
thus greatly reducing production costs and sales prices.
Convenience Food
Convenience Food,Dried Egg Noodle ,Curry Chicken Self-Heating Rice,Self-Heating Rice Halal Food
Ningxia Saiwaixiang Food Co., Ltd. , https://www.nxswxfood.com