newstime：2021-08-24 08:00:40 Click： Source：
What are the installation rules for Check Valves？Check valve: Check valve is also called one-way valve or check valve, its function is to prevent the medium in the pipeline from flowing back. The bottom valve of the pump to close the water also belongs to the non-return valve category. The valve that opens or closes on its own by the flow and force of the medium to prevent the medium from flowing back is called a check valve. Check valves belong to the category of automatic valves. Check valves are mainly used in pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents.
According to the structure of the check valve, it can be divided into three types: lift check valve, swing check valve and Butterfly Check Valve. Lift check valves can be divided into two types: vertical check valves and horizontal check valves. The swing check valve is divided into three types: single-leaf check valve, double-leaf check valve and multi-leaf check valve. The butterfly check valve is a straight-through check valve. The above-mentioned check valves can be divided into three types in connection form: threaded check valve, flanged check valve and welded check valve.
Whether the check valve is installed correctly will seriously affect the function of the check valve. The installation of the imported check valve should pay attention to the following rules:
First, select the appropriate imported check valve according to the parameters of the check valve, nominal pressure or pressure level: PN1.0-16.0MPa, ANSI CLASS150-900, JIS 10-20K, nominal diameter or caliber: DN15~900, NPS 1/4~36, connection method: flange, butt welding, thread, socket welding, etc., applicable temperature: -196℃~540℃, valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8(304), CF3(304L) ), CF8M (316), CF3M (316L), Ti. Selecting different materials, the check valve can be applied to various media such as water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea, etc.
Do not allow the check valve to bear weight in the pipeline. Large check valves should be independently supported so that they are not affected by the pressure generated by the piping system.
When installing, pay attention to the direction of medium flow should be consistent with the direction of the arrow voted by the valve body.
The lift-type vertical flap check valve should be installed on the vertical pipeline.
The lift-type horizontal flap check valve should be installed on the horizontal pipeline.
1. If the customer has special requirements for the product, the following instructions must be provided in the order contract:
(a).Structure length; (b) Connection Type; (c) Nominal diameter;
(d) Product use medium and temperature and pressure range;
(e) Test, inspection standards and other requirements.
2. Our factory can assemble various driving devices according to customer requirements.
3. If the customer needs to customize a special valve, the meaning and requirements of the model should be correctly explained, and the contract should be signed under the conditions that the supplier and the buyer understand the same.
4. For futures and order customers, please call us and tell us the required valve model, specification, quantity, delivery time and location in detail. And prepay 30% of the total contract amount for the preparation of production materials.
QQ客服 