Corrosion resistant lining fluorine lining swing check valves H44F back-pressure valve

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Product Description:

Corrosion resistant lining fluorine lining swing check valves H44F back-pressure valve

 

Stamdard 

Design:GB 12239

Face to face:JB 1688

Flange dimension:JB 78 Or accoring to contract

Test:GB/T 13927

Symbol:GB 12220

Supply: GB/T 12252

Usually, the fluid under pressure to make the disc of the valve opening, and exported from flow inlet side to side.When the import side pressure is lower than the export side, the disc under the action of fluid pressure and gravity itself automatically to channel closed, to prevent fluid backflow.Disc in different ways, according to the check valve is mainly divided into the lift, swing and butterfly 3 classes.Lift check valve body more similar to cut-off valve body, the fluid resistance is larger.This type of check valve for high pressure small, often using the disc and spherical shape.Swing check valves on the fluid resistance is small, suitable for medium and small size, low pressure, large diameter pipelines, often on the channel baffle valve set up multiple disc, become more disc type.Similar to the shape of the butterfly check valve and butterfly valve.It has simple structure, small resistance for fluid.Check valve such as closing too fast, could cause a liquid in the liquid pipe, noise, and even cause the damage of valve parts.In order to avoid this kind of situation, when need can choose buffer function of the check valve, extend the closing time.

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Q:How to install industrial check valves? How should they be used?
4, the check valve closes, will produce water hammer in pipeline pressure, will lead to serious damage to the valve and piping or equipment, especially for the big pipe or high pressure pipeline, it should pay attention to those who use check valve. (end)Check valve to have two kinds, one is installed in the pump before the vertical Straw end, the purpose is to take out a water pump to charge a water pump and pump, because Straw in the anhydrous pump only idle pumping Sheung Shui, so the pump must be filled with water to produce water. The installation of this pump is a kind of method is higher than the water level when the negative pressure is also called method such as drawing water from wells. Another method is the liquid level above the pump pump installation, for this method of using two water supply, because the liquid level above the pump to start and stop the pump when convenient do not turn off the pump outlet valve, the check valve should be installed in the pump in the rear.
Q:How can the lift vertical check valve be distinguished from the lift horizontal check valve?
The check valve is divided into three kinds: lift check valve, swing check valve and butterfly check valve. The lift check valve can be divided into two types: vertical and horizontal. Swing check valve is divided into single, double valve and multi flap type of three. Butterfly valve for the straight through, the above non-return valve can be divided into connection, flange and welding of three lift check valve and stop valve structure similar to the thread in the form of connection, the valve in a line along the channel for the lifting movement, reliable action, but the fluid resistance is large. Small in diameter for the occasion. Lift check valve can be divided into straight and vertical two kinds. Straight through lift check valve can only be installed in horizontal pipe, vertical lift check valve is usually installed in vertical pipe. You can see the picture in Baidu's picture
Q:What are the differences between the vertical check valve and the horizontal check valve in function and principle?.
First of all, the outward appearance of the vertical check valve flow direction, that is, the direction of check valve installation is vertical to the horizontal direction. The horizontal check valve is horizontal.
Q:The working principle of the vacuum check valve
The lift check valve can be divided into two types: vertical and horizontal. Swing check valve is divided into single, double valve and multi flap type of three. Butterfly check valve for straight through, more than a few kinds of check valve, in the form of connection can be divided into thread connection, flange connection and welding three.
Q:Butterfly micro stop type check valve HH46XP-10Q, what does the letter mean?
Do not know what you say is the manufacturer of valves, in general, many models are manufacturers themselves according to the specifications of their products set.
Q:Can the check valve be horizontally installed?
Lift check valve can be divided into straight through and vertical two. Straight through lift check valve can only be installed in horizontal pipe, vertical lift check valve is usually installed in vertical pipe.
Q:Does the check valve of the flue of the range hood work?
Lampblack machine flue check valve is generally installed in the hood outlet check valve, the valve has two blades, a reset spring, exhaust hood leaf was blown open, lampblack machine stop when the blade is spring pressed into the closed state, now is basically take lampblack machine the check valve check valve, but the general tightness is not very good, open the hood can be seen around the gap. According to everyone's reaction and market similar products sold well, smoke hood comes with soot hood flue check valve basically does not work.The picture of the check valve of the flue of the range hood is as follows:
Q:What is the working principle of the flue check valve?
The flue check valve refers to the automatic opening and closing valve plate, which is used to prevent the backflow of soot through the thermal flow of the range hood. It is also called a flue check valve, a smoke prevention treasure and a flue isolator.
Q:Check valve selection
1, do not use ordinary ball check valve, rubber check valve, quick response, but it is not very durable2, vacuum tank3, I think the most benevolent is, get an auxiliary start pump, small kind of, the head is not too high, connect the municipal pipe network, open the main pump before the auxiliary pump irrigation. But the premise is that your main pump is a centrifugal pump
Q:An introduction to the check valve
The check valve, also known as reverse flow valve, check valve, back pressure valve, one-way valve. This kind of valve is automatically opened and closed by the force produced by the flow of the medium of the pipeline itself. It belongs to an automatic valve.

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