A check valve supplier you can trust
Check valves are one of NSW company valve products. We have more than 20 years of experience in check valve production. Check valve design standards according to API 6D, BS 1868, API 594, etc. Our dual plate check valves, swing check valves, piston check valves, axial check valves and tilting disc check valves are well received by international and domestic customers.
How to choose a gate valve
NSW is a specialized gate valve production factory. We have our own gate valve body casting foundy, professional gate valve processing equipment and professional gate valve quality control department. We will provide you with the source gate valve factory price
Check Valve
China, API 594, Dual Plate, Double Plate, Wafer, Flange, Lugged, Check Valve, Manufacture, Factory, Price, RF, RTJ, trim 1, trim 8, trim 5, PTFE, Viton, Metal, seat, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy.
China, Tilting Disc, Check Valve, Manufacture, Factory, Price, Flanged, RF, RTJ, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy.
China, BS 1868, Check Valve, Swing Type, Bolt cover, Manufacture, Factory, Price, Flanged, RF, RTJ, trim 1, trim 8, trim 5, Metal, seat, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy.
China, Ductile Iron, Cast Iron, Dual Plate, Double Plate, Wafer, Flange, Lugged, Check Valve, Manufacture, Factory, Price, RF, RTJ, trim 1, trim 8, trim 5, PTFE, Viton, Metal, seat, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy. Pressure from Class 150LB, PN10, PN16, JIS 10K, JIS 5K
China, Tilting Disc, Check Valve, Manufacture, Factory, Price, Flanged, RF, RTJ, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy. Pressure from Class 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB
What is a butterfly valve
A check valve is a valve that has a circular disc as the opening and closing part and blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The disc movement mode is divided into a lift check valve and a swing check valve. The check valve is mainly used in pipelines where the medium flows in one direction, and only allows the medium to flow in one direction to prevent accidents caused by the water hammer effect.
| Choose a suitable gate valve supplier: First of all, you should choose a gate valve supplier with good reputation and rich experience. When choosing a supplier, you should strictly review its qualifications, production equipment and process level. NSW will be your partner of China valve manufacturer. |  |
| Strictly control the quality of raw materials: The materials used in gate valves directly affect their quality. You should choose high-quality raw material suppliers and conduct strict quality inspection and control on the raw materials. | |
| Strengthen production process control: In the production of gate valves, process control should be strengthened, and operations should be strictly carried out in accordance with process regulations to ensure strict control of each link to prevent quality risks caused by improper operation. | |
| Improve the quality inspection system: After the production of gate valves is completed, comprehensive and detailed quality inspections should be carried out. The inspection equipment should be advanced and accurate, and the inspection methods should be strictly operated in accordance with standards. |
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| Strengthen after-sales service: The quality issues raised by customers should be responded to quickly, the quality issues that arise should be solved in a timely manner, and products and services should be actively improved to continuously improve customer satisfaction. | |
Structural classification of check valves
According to the structure, they can be divided into three types:
Lift check valves are divided into vertical and horizontal types.
Swing check valves are divided into single-flap, double-flap and multi-flap types.
Butterfly check valves are straight-through.
Check valve material classification
Cast iron check valve
Brass check valve
Stainless steel check valve
Carbon steel check valve
Forged steel check valve
Check valve function classification
DRVZ silent check valve
DRVG silent check valve
NRVR silent check valve
SFCV rubber flap check valve
DDCV double flap check valve
Check valve installation method
Swing check valve:
The valve disc of the swing check valve is disc-shaped and rotates around the rotating shaft of the valve seat channel. Because the channel inside the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for large-diameter occasions with low flow rate and infrequent flow changes, but it is not suitable for pulsating flow. Its sealing performance is not as good as the lift check valve. Swing check valves are divided into single-disc type, double-disc type and multi-disc type. These three forms are mainly divided according to the valve diameter. The purpose is to prevent the medium from stopping or backflowing and weakening the hydraulic impact.
Lift check valve:
A check valve whose valve disc slides along the vertical center line of the valve body. The lift check valve can only be installed on a horizontal pipe. The valve disc on the high-pressure small-diameter check valve can be a ball. The valve body shape of the lift check valve is the same as that of the stop valve (which can be used with the stop valve), so its fluid resistance coefficient is larger. Its structure is similar to that of the stop valve, and the valve body and valve disc are the same as those of the stop valve. The upper part of the valve disc and the lower part of the valve cover are processed with guide sleeves. The valve disc guide sleeve can be freely raised and lowered in the valve guide sleeve. When the medium flows downstream, the valve disc is opened by the thrust of the medium. When the medium stops flowing, the valve disc falls on the valve seat by self-sagg, which prevents the medium from flowing back. The medium inlet and outlet channels of the straight-through lifting check valve are perpendicular to the direction of the valve seat channel; the medium inlet and outlet channels of the vertical lifting check valve are the same as the direction of the valve seat channel, and its flow resistance is smaller than that of the straight-through type.
Disc check valve:
A check valve in which the disc rotates around the pin shaft in the valve seat. The disc check valve has a simple structure and can only be installed on horizontal pipes, and its sealing performance is poor.
Pipeline check valve:
A valve in which the disc slides along the center line of the valve body. The pipeline check valve is a new type of valve. It is small in size, light in weight, and has good processing technology. It is one of the development directions of the check valve. However, the fluid resistance coefficient is slightly larger than that of the swing check valve.
Compression check valve: This valve is used as a boiler feed water and steam cut-off valve. It has the combined functions of a lift check valve and a stop valve or angle valve. In addition, there are some check valves that are not suitable for pump outlet installation, such as bottom valves, spring-loaded check valves, and Y-type check valves.
What working conditions are check valves suitable for
Check valves are widely used in various industrial fields, including desalination, water and waste treatment, chemical, food and beverage, geothermal, mining, oil and gas, power, pulp and paper, refining, etc. In addition, check valves are also commonly found in domestic applications, such as the discharge line of sewage pumps.
Why choose a butterfly valve manufacturer - NSW - a China factory
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| Source gate valve factory | Perfect gate valve quality control system | Professional gate valve technical team | Enthusiastic sales team | 7*24 after-sales team |
| Get the gate valve price directly from the factory Control the gate valve quality directly from the factory |
According to the ISO 9001 quality control system, the quality of gate valves can be very well controlled in every production link in the NSW factory. | The technicians are very familiar with the structure and performance of gate valves. Help customers choose the right gate valve and gate valve material according to the pipeline fluid medium. | The sales team is full of vitality and enthusiasm, closely assisting customers and valve technical team, telling customers valve selection and gate valve prices. | If customers encounter questions in the use of gate valves, our after-sales team will help customers solve gate valve problems within 30 minutes after receiving feedback. |