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

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

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 10 set

Supply Capability:: 100 set/month

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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.

Q:How much is the 6 point check valve for the water pipe at home?: Different places, different prices, it is estimated that 20-30 copper. Complete check is impossible, and the effect depends on the actual situation,

Q:What about boiler non-return valve without return?: There are two reasons: 1 pipe dirty, need to clean up.2 pressure difference between the two sides of the valve, see the pressure on both sides is how much?

Q:Which kind of steam check valve is good?: The shell material 13, ball valve can be made of stainless steel, sealed hollow sphere parts can be coated PTFE engineering plastics, can also be applied in the pipeline so general corrosive medium, the temperature at -101--150 DEG C, the nominal pressure is less than 4.0MPa, nominal in the range of 200 - 1200;14, for non compressible fluid check valve selection, first of all the required closing speed evaluation, the second step is to select the type of check valve that may meet the required closing speed;15, can be used for check valve selection of fluid compression can be selected according to the similar method can not check valves for compressed fluid flow, if the medium category is used for large, compressible fluid check valve can be used for a slow device, if not continuous medium flow fast to stop and start such as, the outlet of the compressor, use the lift check valves;16 the check valve shall determine the size of the response. The valve supplier must provide the data data of the selected size so that the valve size of the valve opening at a given flow rate can be found;17, for the following DN50mm high and low pressure check valve, should choose vertical lift check valve and straight through lift check valve;18. For DN50mm low pressure check valves, butterfly check valves, vertical lift check valves and diaphragm check valves shall be used;19, for DN greater than 50mm, less than 600mm high pressure check valve, it is better to use swing check valve;20, for DN greater than 200mm, less than 1200mm of medium and low pressure check valve, should choose no wear ball check valve;21, for DN greater than 50mm, less than 2000mm low pressure check valve, Iraq butterfly butterfly check valve and diaphragm check valve;22, for the closure of water shock or small impact of the pipeline, it is appropriate to use the slow closed swing check valve, butterfly butterfly valve closed

Q:What type of check valve should be installed before the suction pump?: second body cover seal welded forged steel check valve, connected by this form of valve, the valve body and the valve cover are connected by screw, all welded seal, the advantage of no leakage.

Q:What is the difference between the H44H check valve and the H41 check valve?: Swing check valve H44HLift check valve H41HThe installation of check valves (Check, Valve) shall pay attention to the following items1. Do not allow the check valve to bear weight in the line.

Q:How to install fire fighting pipe and flue fire check valve?: 4, the installation of flue should each layer as bearing, bearing steel 2 root diameter over 14mm?.5, after the installation of the flue, in each flue check valve of the reserved installation of fire type flue check valve, with special glue mixing cement, coated with a check valve installed in the valve hole edge, and then back to the reservation in check at.6, the construction should be reserved at all levels of the hole, covered with a cover plate, to ensure safety in construction, to prevent construction waste fall into the flue.

Q:Does FOTILE hood have check valve?: The range hood is now equipped with a check valve at the top, also called a check valve.However, no matter how high gear or general lampblack machine, the built-in check valve is not very tight.

Q:Why can't the check valve on the air pipe be used when the wind speed is less than 8 meters?: First of all, you must understand the working principle of the check valve, indeed, as you said, you can adjust the position of the hammer by adjusting the position of the drop hammer.If you are in their own design and production, consider the thickness of the blade, drop hammer size, weight, and other parameters considered.Hope to be of help to you!

Q:How can the lift vertical check valve be distinguished from the lift horizontal check valve?: Vertical lift check valves and lift horizontal check valves are different in structure, type, appearance, including installation.Vertical lift check valve, also known as vertical check valve;Lifting horizontal valve check valve, also known as horizontal check valve.Lift check valve: check valve sliding along the vertical centerline of valve body, lift check valve can only be installed on horizontal pipe,Disc can be used in high pressure small bore check valve. The valve body of the lift check valve is the same as the cut-off valve (which can be used with the stop valve), so it has a large coefficient of fluid resistance. The structure is similar to the cut-off valve, the valve body and the disc are the same as the cut-off valve. The lower part of the upper valve and the valve cover processing guide sleeve, the valve in the valve lift free guide simple simple light driven, when the medium downstream, the valve by the media force open, when the media stopped flow, the valve by the self vertical landing on the seat, preventing the media from the upstream effect.Through lift check valve, the direction of inlet and outlet of medium is perpendicular to the direction of valve seat passage;Vertical lift check valve, the direction of its medium inlet and outlet passage is the same as that of valve seat passage, and its flow resistance is smaller than straight through.

Q:What does "H" for H42W check valves mean?: Valve type codeGate valve ---ZStop valve ---JThrottle valve ---LBall valve ---QButterfly valve ---DDiaphragm valve ---GPlug valve ---XCheck valve and valve ---HSafety valve ---ARelief valve ---YSteam trap ---SConnection form codeInternal thread ---1External thread ---2Flange ---4Welding ---6Yes, clip ---7Clamp ---8Jacket ---9Check valve and valve structure of codeLifting typeA.

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