Copper double door bottom valve

Copper double door bottom valveIt is an energy-saving valve,Generally installed at the bottom of the underwater suction pipe of the water pump.Limit the return of liquid from the water pump pipe to the water source,Plays a function of only entering and not exiting.

There are many inlet products and reinforcement ribs on the valve cover,It plays a role in preventing blockages easily,Mainly used in pumping pipelines.The role of waterways and supports.Caliber with single petal,Double valve,

Multi petal type.There are flange connections and threaded connections.Bottom valve estimated by valve,valve disc,valve cover,bushing,Composition of sealing rings and other components,Liquid enters the valve body from the valve cover.Under the pressure of the fluid

Under the action of force,Valve disc open,When the pressure inside the outlet pipe stops, the valve disc will quickly close,The liquid will not flow back,Plays a role in both smooth and energy-saving.

1To prevent backflow of the medium, check valves should be installed on equipment, devices, and pipelines;

2Check valves are generally suitable for clean media and should not be used for media containing solid particles and high viscosity;

3Generally, in the nominal Tongjing50mmVertical lift check valves should be used on horizontal pipelines;

Copper double door bottom valvePerformance specifications:

Nominal pressure:PN0.25MPa

Nominal diameter:DN40～DN100

Media used: gasoline, diesel, kerosene; Water and non corrosive media

Connection form: threaded connectionNPT；

Flow range:0-60rise/Valve closing speed:0.5S；

Usage environment:-30℃～+55℃。

Working principle of double door bottom valve:

Consultation on the suction pipe between the upper valve body and the fuel oil dispenser,When the fuel dispenser motor starts,Negative pressure is formed inside the suction pipe,Make the pressure on the lower valve body side higher than the pressure on the upper valve body side;

The valve disc is lifted upwards due to the influence of the pressure difference between the upper and lower parts, and the double door bottom valve is raised downwards,The oil can enter the suction pipe of the fuel dispenser. When the motor stops working, the negative pressure inside the upper valve body disappears, and due to

The static pressure of the oil circuit becomes positive pressure, and the valve disc automatically closes under the action of positive pressure, preventing the oil from falling back. Due to the use of two identical valve bodies and discs for this check valve,Make the performance of the check valve more reliable.

Technical parameters of double door bottom valve:

Precautions for installation and use of double door bottom valve:
1When assembling the double door bottom valve, the plastic protective cover on the valve disc should be removed, cleaned, and all mating components should be tightened. The filter screen should also be installed to prevent the suction of dirt.

2The valve body and disc seal of the double door bottom valve are precision ground, so when assembling, do not swap them up and down, and do not swap them with other bottom valves,以免降低止回性能。

Once it causes confusion, ink coloring can be used for inspection, and it should overlap with the original grinding mark.

Ordering Notice:

Please specify when placing an order:Product name, nominal diameter, pressure rating, material, flange standard, operating pressure and other detailed parameters. The above product sizes are standard universal models. When the usage is very important or the environment is complex,Please provide design drawings and detailed parameters as much as possible, and our experts will review and approve them for you. If the breathing valve, flame arrester, petroleum accessories, and product model have been selected by the design unit, they can be directly ordered from our sales department