1. Steam boiler safety valve, generally open open full spring safety valve;
2. Safety valve for liquid medium, generally use micro-open spring safety valve;
3. For safety valves for air or other gaseous media, generally use closed closed spring safety valves;
4. For LPG tank trucks or liquefied petroleum gas railway tank truck safety valves, generally use full-open internal safety valve;
5. Safety valves for the exit of production wells, generally adopting pilot-operated safety valves;
6. High-pressure bypass safety valve for steam power generation equipment, generally adopts pilot-operated safety valve with dual functions of safety and control.
7. If a regular opening test of the safety valve is required, a safety valve with a lifting wrench should be used. When the medium pressure reaches more than 75% of the opening pressure, the lifting valve can be used to lift the valve flap slightly from the valve seat to check the flexibility of the safety valve opening;
8. If the temperature of the medium is high, in order to reduce the temperature of the spring chamber, when the temperature of the closed safety valve exceeds 300 °C and the operating temperature of the open safety valve exceeds 350 °C, a safety valve with a radiator should be selected;
9. If the back pressure of the safety valve outlet is fluctuating, and the amount of change exceeds 10% of the opening pressure, the bellows safety valve should be selected;
10. If the medium is corrosive, a bellows safety valve should be used to prevent important parts from failing due to corrosion of the medium.
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
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