The super lifting disc check valve is a valve in which the opening and closing member is a circular valve flap and acts on its own weight and medium pressure to block the reverse flow of the medium. It is an automatic valve, also known as a check valve, check valve, return valve or isolation valve. The flap motion mode is divided into lift type and swing type. The lift check valve is similar in construction to the shut-off valve and lacks only the valve stem that drives the flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the valve disc weight and its flow resistance, the valve is opened. Conversely, the valve closes when the media is reversed. The swing check valve has a valve flap that is inclined and rotatable about the shaft, and operates in a similar manner to the lift check valve. Check valves are often used as bottom valves for pumping devices to prevent backflow of water. The combination of the stop valve and the shut-off valve provides a safe isolation. The disadvantage is that the resistance is large and the sealing is poor when closed.
1.Size :2"~48" (DN50~DN1200)
2.Working Pressure :150Lb,PN10,PN16
3.Working Temperature :-20°C~250°C
A.Design&Manufacture standard: API 594,BS 1868
B. Face to face: ASME B16.10. DIN3202.
C.Pressure&Temperature standard: ASME B16.34
D.Flange standard: ASME B16.5, ASME B16.47. JIS B2220. DIN 2543-2550
E:Test&Inspect standard: API 598, API 6D.
1.Short structural length,only 1/4~1/8 of that of traditional flange check valve;
2.Low volume,light weight,only 1/4~1/20 of those of traditional flange check valve;
3.Quick valve disc close down,low water hammer pressure;
4.Applicable for and easily installed for vertical or horizontal pipelines;
5.Smooth flow passageway and small fluid resistance;
6.Flexible action and good sealing performance;
7.Narrow valve travel and small close down impact;
8.Integrated structure,simple and compact,in beautiful shape;
9.Long service life and good reliability.