Duckbill valve's popular name: The rubber discharge check valve also can be called discharge rubber check valve, rubber check valve, rubber check back valve, Spanish calls "the duckbill shape flexible check valve; And Americans call the duckbill shape rubber even valve". On the basis of Spanish ROSS Valve Company and the American Red Valve Company's summary, model and revolutionary re-engineering, we devote to improve the function the rubber discharge check valve (duckbill shape flexible check valve) continuously, to enhance the performance, making this valve's intensity, toughness, the leak-proof quality to be enhanced greatly. This valve does not have any activity module, and is exempted from any service. This valve is available for the ascending pipe, the flange pipe, the cement pipe, the glass steel pipe fitting.
This valve is widely used in the seacoast, the sand beach, the wharf, the reservoir, the municipal administration expelling flood water, the pollution discharge. So it can be said that is the environmental protection green valve. This valve substitutes flap check valve, for the reason that completely solves the obstruction problem of the silt, the stone, the vegetation and the marine life which is easily caused when use knocking door check valves. Flange rubber discharge check valve main application: Applies in the waterproof system, the drainage system, the water pump outlet, the pumping station and the fluid the aeration system.
Its main features: The rubber flange connects with the valve body to become one which makes great convenience of the installment. The valve body fully adopts the rubber designing, which would not cause the phenomenon of the siltation or the thing block, at the same time reduce the maintenance cost, and allow the solid particle to pass though smoothly. Valve body material is the chloroprene rubber, CSM, buna-N rubber, EPDM and so on, and flange material is Q235, 304, 316 and so on. Standard dimensions of flange duckbill valve: In its popular speaking there are two kinds of installation dimensions in the whole nation. One of the installation dimensions connection is based on the GB code flange connection. In order to coordinate with the national standards, our Engineer Li Tongwen who designed the duckbill valve in earliest time stipulated that if the caliber of the duckbill valve is below 800mm, its flange standard should refer to the GB code of ten kilogram bolt hole center distances and the flange outer diameter; And if the one is above 800mm caliber (including800mm), should refer to the GB code of 6 kilogram bolt hole center distances and the flange outer diameter.
Another installation dimensions is the self-owned size which is based on the representatives of Jiangsu Blue Valves and Nanjing Shuimei. The advantages and disadvantages of duckbill valves
Advantages: The duck mouth valve cost is low, if uses the appropriate rubber raw material, the working life will surpass the metal check valve. Meanwhile, the easy installation, diverse and flexible installation methods, and can be repaired.
Shortcoming: The rubber body is not suitable for long time outdoors working, even using the high quality rubber cannot avoided the aging phenomenon.
|
Nominal diameter(inch) |
Valve port stair(mm) |
Pipeline toughing
distance(B>mm) |
|
1/2 ~3/4 |
15 |
15 |
|
1~1 1/4 |
20 |
20 |
|
1 1/2~2 1/2 |
25 |
25 |
|
3 |
40 |
40 |
|
4 |
50 |
50 |
|
6 |
50 |
50 |
|
8 |
50 |
50 |
|
10 |
50 |
50 |
|
12~14 |
100 |
100 |
|
16~20 |
150 |
150 |
|
24~36 |
200 |
200 |
|
42 |
250 |
250 |
|
48~60 |
300 |
300 |
|
72 |
400 |
400 |
|
Note: Valve of DN800-1800(32”-72”) is with double Clamps. |
Gongyi Liangda Tubes Co., Ltd was established in 1985. Its former name is Gongyi Changfen Village Mechanical Factory. In 2007, it was transformed into a limited liability company (Gongyi Liangda Tubes Co., Ltd, and GYLDT Ltd for short). Since its foundation, our company is specialized in the product of rubber check valves (duckbill valves), steel expansion joints, rubber expansion joints(flexible rubber joints)and flanges.
We apply ourselves to the design and production of valves and pipes fittings. And we have the capability of advanced design, development and supply. We can design products according to the request of customers. As a result, we have received a favorable reception of our cooperative partner for many years.
We have begun to make and design the rubber expansion joints since 1986. And in 2003 we first produced the duckbill valves (Patent Number: ZL2003 2 0113496.0)in the country. The duckbill valve has passed the quality inspection report (JJ2007018 Gongyi Technical Supervision Bureau). Therefore, we have maintained the leading position in rubber check valves (duckbill valves) and rubber expansion joints at home. We first produced curved duckbill valve (180 degrees turn) in China in 2007 which filling the domestic blank.
Our company owns 3 large high temperature vulcanization cans, 7 small high temperature vulcanization cans, 2 stereotype cabinets, 1 large steam curing equipment (2 tons), one small steam curing equipment (0.5 tons), 6 lathes, 2 drill presses, 1 planer, 1 milling machine, and 9 various weld machines. In order to guarantee the quality, our company gets a set of rubber joint pressure testing machine, which can test DN50-2400 rubber joint, and a set of flexible connectors pressure testing machine, which can test all DN50-2400 steel expansion joints and flanges. In addition, our company specially designed 1 testing machine of duckbill valve with the leading position in China.
Leading technology innovation, advocating better quality. GYLDT, develops with you hand in hand.
Should any further requirements, feel free drop us a mail or phone call, we will offer all our efforts to give you a satisfied answer.
