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.
Classification
The main product includes: XH81, XH81A, XH41, XH41A rubber discharge check valve (Spanish calls "the duckbill shape flexible check valve; And Americans call the duckbill shape rubber even valve").
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 maintenan main features CE 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.
Applications:
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.
Installation methods and dimensions:
It is made of rubber flanges, valve body and duck-billed, and with metal flange gaskets, can be connected with metal flange naturally, directly installed on the tank, pipeline and cofferdam. Installation of connection, flanges and flange dimensions correspond to guarantee absolute seal after fastening the join, we need to pay attention not to hit rubber sewage valve flange lips.
The duckbill valve installation and usage:
Straight elevating check valve should be installed on the horizontal pipeline, the vertical elevating check valve and the bottom valve generally on the vertical pipeline with the medium flows from bottom to top.
The installation position of the elevating type check valve is not restricted. It is usually installed in horizontal pipeline, but may also installed in the vertical pipeline or leaned on the material pipeline.
When installs the check valve, people should pay special attention to the medium flow direction, be supposed to make the medium normal flow direction be in line with the arrow direction which instructed with the valve body, otherwise the medium the normal flowing direction will be interrupted.
The bottom valve should be installed in pipeline's bottom end of the water pump absorbing water. When the check valve shuts down, the hammer pressure in the pipeline will be formed which will damage the valve, the pipeline or equipment, especially the big caliber pipeline or high-pressured pipeline under serious condition. Therefore the conditions should bring to the check valve users' high attention.
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.
| SIZE ID (mm) | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 |
| VALVE DIMENSIONS | OD | (mm) | 565 | 615 | 670 | 780 | 895 | 975 | 1075 | 1175 |
| F/F | (mm) | 550 | 605 | 630 | 760 | 775 | 860 | 940 | 1150 |
| W | (mm) | 605 | 645 | 750 | 880 | 950 | 1220 | 1320 | 1430 |
| Weight | (kg) | 20.6 | 25.5 | 35 | 56.2 | 70 | 90 | 115 | 142 |
Gongyi City Liangda Tubes Co., Ltd. Was established in 1985. Our predecessor is Gongyi Changfen Village Mechanical Factory. In 2007, our company was transformed into a limited liability company (Gongyi City Liangda Tubes Co., Ltd.; GYLDT for short). Since foundation, our company is specialized in the production of rubber expansion joints (flexible rubber joints), rubber check valves (duckbill valves), steel expansion joints, flexible butterfly valves and flanges.
We apply ourselves to the design and production of valves and pipes fittings. We have the capacity of advanced design, development and supply. We can design products as per the request of customers. As a result, we have received favorable comments from our partners for many years.
Our company owns 3 large high temperature vulcanization cans, 7 small high temperature vulcanization cans, 2 stereotype cabinets, 1 large steam curing machine (2 tons), 1 small steam curing machine (0.5 tons), 2 lathes, 2 drill presses, 1 planer, 1 milling machine, and 5 various welders. In order to guarantee the quality, our company gets a set of rubber joint pressure testing machine, which can test DN50-2400 rubber joints, and a set of flexible connector pressure testing machine, which can test all DN50-2400 joints. In addition, our company has specially designed the testing machine of duckbill valves with a leading position in China.
Leading with technology innovation and advocating good quality, Liangda will develop with you hand in hand.
We began to make and design rubber expansion joints in 1986. In 2003 we produced the duckbill valves in the country. The duckbill valves have passed the quality inspection (issued by JJ2007018 Gongyi Technical Supervision Bureau). Therefore, we have maintained the leading position in the fields of rubber check valves (duckbill valves) and rubber expansion joints at home. In 2007, we firstly produced curved duckbill valves (180 degrees turn) in China, filling in the domestic blank.
