Wafer Check Valve_Duo Check Valve-PN10/PN16

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Packaging & Delivery

Packaging Detail:bubble bag+ paper case+ wooden box, OR per custoers' requiremen
Delivery Detail:7days, 15days, 30 days, according to customers' requirement


1.wafer check valve 
2. approved by CE and ISO9001 
3. meet ANSI,DIN,BS,etc 
4. manufacturer supply 
5. OEM valve accept

 wafer type ,Duo check valve



The standard of wafer type, duo check valve

1. Design standard conform to: MSS SP-67, API609, EN593
2. Connection flange conform to: DIN PN10/16/25, ANSI B16.1, BS4504, ISO PN10/16,
                                                        JIS B2212/2213, BS 10 Table D, BS 10 Table E
3.Top flange conform to: ISO 5211
4.Face to face conform to: API609, ISO5752 series 20, BS5155
5.Test standard conform to: API598



The design characters of wafer type duo check valve
Check valve is used for preventing the back flow of medium in pipelines and equipments. It will open and close automatically by the pressure of medium. When the medium is back-going, valve disc will close automatically to avoid accidents.
1. Tightly sealed, without leakage under the water pressure testing.
2. Economical, light weight, compact design-significantly lighter and less expensive than comparable swing check valves.
3. Easy to install and maintain.



The perfomance of wafer type, Duo check valve
1. Nominal Diameter: DN40-DN1200
2. Nominal Pressure PN (MPa):  1.0, 1.6, 2.0, 2.5
3. Testing pressure (water) Ps (MPa)
4. Body seat: 1.5 times rated pressure
5. Seat test: 1.1 times rated pressure



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: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:Can the check valve be used on the steam pipe?
The check valve can be used on the steam pipe, but only the right material.General steam pressure WCB, temperature and pressure with the then high chromium molybdenum steel. The inside of the valve should be taken into account, depending on the pressure difference.
Q:Is the check valve a check valve? What is its main purpose?
Check valve, also known as one-way valve or check valve, its role is to prevent the medium back in the pipeline.
Q:Three forest electric water heater, hot water flow is small, check valve dripping problem?
Check valve and check valve is to prevent backflow of water, the valve is used for pressure relief, when the water heater pressure is too high, the pressure through the pressure relief valve and pressure relief valve on the other: for water, the quality is not good, the main problems for the water pressure is too low to cause, and check valve and pressure relief valve will further reduce the pressure, you can try to check off a try, I think the check valve is useless. If not, just add a booster pump to the cold water inlet.
Q:My hood inside outside blow valve pops ringing
The hood check valve is in two halves of plastic. It is too light and the wind vibrates. You can add some things, as long as the soot blowing function is OK (try several times). Able to solve problems.
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 is the structure of the check valve of the screw air compressor?
Work process: air pre filter, and then through the air filter and the air inlet controller into the mixing chamber and the compression screw lubricating oil, continuous linear by asymmetric rotor two, compression. The compressed oil and gas mixture enters the tank and the separation system for three levels of separation (centrifugal, self weight, and fine separation). The separated compressed air is discharged after the cooler is cooled, and a reliable pressure switch system controls the exhaust pressure. When the machine is running, the screw compressor run oil system by pressure difference automatic circulation, without pump. When starting, the minimum pressure valve is closed to ensure the minimum pressure required for the lubrication oil circulation. In addition to lubrication, the oil also acts as sealing, cooling and reducing noise. High efficiency oil and gas separator and high efficiency cooler ensure high quality compressed air.
Q:Which side of the gate is the fire check valve in the pump room?
The check valve is installed between the shock absorbing flexible joint and the water outlet control valve at one side of the water outlet pipe of the water pump
Q:Do you still need to check valve fittings for solar water heater installation?
Generally not required. The function of the check valve is to prevent hot water from flowing back into the water pipe so as to heat the pipe.If you don't worry, you can add one, spend a little money, ask for peace of mind.Now the water mixer which will have a check ball.
Q:What is the function of the check valve in the pipeline?
An important role for Fujian Biaoguang valve for check valve in the pipeline: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 check valve and horizontal check valve. Swing check valve is divided into single check valve, double check valve and multi flap type check valve three. Butterfly check valve for the straight through check valve, the above several kinds of check valve in connection form can be divided into threaded connection, check valve, flange connection check valve and weld check valve three kinds.

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