Oilfield Back-Pressure Sustaining Valve/Oilfield Back-sostenedora de presión Válvula

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The check valve is also called or a one-way valve, its role is to prevent 

the backflow medium pipeline.The bottom valve of the pump suction 

off also belong to the check valve class.Open-close part by medium 

flow and power to open or closed, to prevent the backflow medium 

valve check valve.Check valve belong to automatic valve class, mainly 

for the one-way flow of medium pipeline, only allowed to medium 

flows in one direction, in order to prevent accidents.

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.



We have organized several common questions for our clients,may help you sincerely:

①How about your company?

A world class manufacturer & supplier of castings forging in carbon steel and alloy steel,is one of the large-scale professional investment casting production bases in China,consisting of both casting foundry forging and machining factory. Annually more than 8000 tons Precision casting and forging parts are exported to markets in Europe,America and Japan. OEM casting and forging service available according to customer’s requirements.

②How to guarantee the quality of the products?

We have established the international advanced quality management system,every link from raw material to final product we have strict quality test;We resolutely put an end to unqualified products flowing into the market. At the same time, we will provide necessary follow-up service assurance.

③How long can we receive the product after purchase?

In the purchase of product within three working days, We will arrange the factory delivery as soon as possible. The pecific time of receiving is related to the state and position of customers.Commonly 7 to 10 working days can be served.



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Q:Above the flue that valve is called smoke exhaust valve or check valve, I heard there is a five anti exhaust valve
The names are different, and they are acceptable. Five, anti exhaust valve is unique to 10000, the first class of technical effects
Q:Furnace blower outlet check valve what
Must install check valve to prevent downtime fan reversal
Q:Check valves - check valves - what's the difference between one-way valves?
Check valve. Check valve is the same, but the name is not the same. According to the customary name of the country. In fact, the same valve.
Q:What's the size of the check sleeve?
According to the quota items can be set corresponding to the valve diameter less than DN40, the thread sets, DN50 sets of flange connection can, according to the actual unit price to enter it.
Q:Can the flue check valve and kitchen check valve protect against odor?
Not really. It depends on what valve it is. If it is a variable pressure air valve, of course, if it is an ordinary other valves, generally only temporary role. Five residential home kitchen platoon smoke system is the application of this variable pressure air valve.
Q:How to install the kitchen flue check valve?
First, we should pay attention to the direction of check valve opening, open the location to smoke pipe opposite;Second, we should pay attention to check valve and common flue or after the installation of household flue sealing point, if the conditions are called thick putty plugging;Third, after the check valve is installed and fixed, the smoke exhaust pipe should be tightly packed with the check valve.Remark: when choosing check valve, choose a brand with better sealing effect, such as submarine.
Q:Can the swing check valve stand upright?
Ordinary lift check valves shall not be erected. Lift check valves with springs can also be mounted.
Q:What can I do with the lift check valve?
With the structure of short length, small volume and light weight, the valve closed fast, water hammer pressure, flow smooth, fluid resistance small, horizontal or vertical pipe pipe can be used, easy installation, quick action, good sealing performance, the valve stroke is short, close the valve impact force is small, simple and compact, beautiful appearance, service life long, high reliability, to prevent the media back, the characteristics of automatic control. A lift check valve is used on an industrial pipe to prevent the flow of a medium.
Q:Check valve H41T-16. What are the numbers and letters in it?
H stands for check valve, 4 stands for flange 1, and represents form 16 for pressure. This is cast iron lift check valve
Q:Butterfly check valve should be equipped with special flange for butterfly valve
No, with a special appearance Jansen point flange butterfly valve. It can barely be installed without special flanges

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