Wafer Type Double Door Butterfly Check Valve

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TT or LC
Min Order Qty:
50 Pieces pc
Supply Capability:
50000 Pieces Per Month pc/month

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Product Description:


‍Packaging & Delivery of Double Disc Wafer Swing Check Valve 

Packaging Details: Veneer board boxes
Delivery Detail: Within 35 days after confirm of order(according order quantity)


Specifications of Double Disc Wafer Swing Check Valve 


1. Size: DN50-DN600

2. pressure: PN16, CL125/150

3. Seal: NBR / EPDM

4.CI,DI,SS Body

Technical specificatiion:

1)valve Design and production according to ASMEB16.34,BS1873 and GB/T12235;

2)The sizes of flange ends according to ASME B16.5,GB/T9113 and HG20596 (or specified by customers);

3)Inspecting standard: API598, JB/9092

4)valve Material: WCB,Stainless steel,carbon steel etc

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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 is the difference between the check valve rcvx and SFCV?
3, swing type: liquid in the valve straight through, relying on the pressure to open the side of the rotating valve flap, after the loss of pressure, the valve depends on the weight back, the reverse of the liquid pressure closed valve. Other one-way valves (check valves), such as the sewage check valve, air defense explosion-proof valve and liquid use of the principle of the check valve is very similar.
Q:Check valve note BC/PISTON: SPR-L what does that mean?
BC==Bolted Cover/ bolted bonnetPISTON== lifting typeSPR-L==Spring-loaded/ is loaded with springsTogether, it is: a spring-loaded check valve. Bolted bonnet (this is common)
Q:How can the fast closing noise check valve prevent water hammer?
Biaoguan valve that once the pump stopped, check valve spool in the spring or other auxiliary device for double end under the action of force balance in advance to the closed position, can greatly reduce the amount of water and initial water reflux falling height, water hammer force is calculated by gravity superposition, to reduce the amount of water is equal to the reduced gravity, but fell short height reduces the inertia time is relatively reduced speed, and can prevent the formation of destructive or reduce water hammer water hammer.
Q:What is the purpose of installing a check valve in the air pipe before the fan?
The fan before the wind pipe installed on the check valve to prevent the fan after the ceased operation outside of the wind because of the air pressure is blown indoors because of the inverse.
Q:Are the gate valves and check valves of the same type?
Not the same gate valve, it is a kind of opening and closing function (i.e. switch) of the valve, it is on the gate lifting and play the role of the switch, the switch is to be applied by external force (hand wheel, electric, pneumatic and hydraulic) it is not required to;
Q:Does FOTILE hood have check valve?
If necessary, you can contact the aftermarket directly, technicians can bring home Oh ~!
Q:How can the PPR pipe be connected to the check valve?
The check valve and the PPR pipe are connected by two flanges to the clamp, and the clip type check valve and the two pipes (flanges) are clamped together directly with bolts.
Q:What does the swing check valve "h44h-16" mean?
Swing check valve with the built-in rocker swing structure, all opening and closing parts are arranged in the valve body of the valve, the valve does not penetrate, in addition to the seal gasket and seal ring with flange, overall no leak, to prevent leakage of the valve may be. Swing check valve rocker and disc connections using spherical connection structure, so that the valve in the 360 degrees within a certain degree of freedom, there is appropriate micro position compensation.
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!
We mainly produce various check valves (for example,single disc swing check valve,double disc swing check valve,ball check valve,lift check valve, butterfly valves,diaphragm valves ,ball valves and so on). Our products are widely used in municipal water and wastewater ,oil,chemical, food and other fields.Our entire valves are designed and manufactured according to ANSI (ASME), DIN, BS, JIS and other standard. Also, we ensure the best quality for customers, and our strict quality assurances systems are conducted throughout the entire production at the standard of ISO9001:2008 and CE.

1. Manufacturer Overview

Location Shandong,China (Mainland)
Year Established 2002
Annual Output Value US$2.5 Million - US$5 Million
Main Markets 40.00% Western Europe
10.00% Mid East
10.00% Southeast Asia
10.00% Africa
10.00% Eastern Asia
5.00% South America
5.00% Eastern Europe
5.00% Northern Europe
2.00% North America
Company Certifications ISOT19001:2000;CE

2. Manufacturer Certificates

a) Certification Name  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port QingDao
Export Percentage 91% - 100%
No.of Employees in Trade Department 3-5 People
Language Spoken: English, Chinese
b)Factory Information  
Factory Size: 10,000-30,000 square meters
No. of Production Lines 9
Contract Manufacturing OEM Service Offered Design Service Offered
Product Price Range Average