Solid Flange Forged Steel Check Valve

• Media: Water
• Temperature: Ordinary Temperature
• Material: Forged Steel
• Connection Form: Flange
• Structure: Swing
• Pressure: Ordinary Temperature
• Model NO.: H41
• Function: Ddcv Double Lobe, Nrvr Silence, Sfcv Rubber Lobe, Nrvz Silence
• Sealing Form: Gland Packings Globe Valve
• Flow Direction: Bidirectional
• Standard: GB
• Application: Industrial Usage, Water Industrial Usage
• Country of Origin: Beijing
• Transport Package: Wooden Case
• Specification: DN15-DN50
• Trademark: BVMC
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000pieces/Year

Product Description

Check valves can also be used in pipelines that supply auxiliary systems in which the pressure may rise above the system pressure. Check valves can be mainly divided into swing check valves (rotating according to the center of gravity) and lifting check valves (moving along the axis). The function of this type of valve is to allow the medium to flow only in one direction and prevent the flow in the opposite direction. Usually, this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the disc opens. When the fluid flows in the opposite direction, the fluid pressure and the self-overlapping disc of the disc act on the valve seat, thus cutting off the flow. Among them, the check valve belongs to this type of valve, which includes swing check valve and lifting check valve. Swing check valve has a hinge mechanism, and a disc like a door freely rests on the inclined seat surface. In order to ensure that the disc can reach the proper position of the valve seat surface every time, the disc is designed in the hinge mechanism, so that the disc has enough swing space and makes the disc truly and comprehensively contact with the valve seat. The disc can be made entirely of metal, or it can be inlaid with leather, rubber, or a synthetic covering, depending on the performance requirements. When the swing check valve is fully opened, the fluid pressure is almost unimpeded, so the pressure drop through the valve is relatively small. The disc of the lifting check valve is located on the sealing surface of the upper seat of the valve body. This valve is like a globe valve except that the disc can be lifted freely. The fluid pressure makes the disc lift from the sealing surface of the valve seat, and the medium backflow causes the disc to fall back to the valve seat and cut off the flow. According to the service conditions, the disc can be all-metal structure, or it can be in the form of embedding rubber pad or rubber ring on the disc frame. Like the globe valve, the passage of fluid through the lift check valve is narrow, so the pressure drop through the lift check valve is larger than that of the swing check valve, and the flow of the swing check valve is rarely restricted.

Technical parameters and characteristics:
Product	Switch valve
Product description	Swing check valve
Model	H41
Size	2"~60"(50mm~1500mm)
Operating temperature	-196ºC~593ºCacc to material
Operating pressure	150-2500 CLASS
Material	A216 WCB,WCC;A217 WC6,WC9,C5,C12,C12A,CA15;A351 CF8,CF8M,CF3,CF3M,CF8C,CN3MN,CK3MCUN,CN7M;A352 LCB,LCC;A494 CW-6MC,CU5MCuC,M35-1;A995 4A(CD3MN),5A(CE3MN),6A(CD3MWCuN);ASME B 148 C95800,C95500 .etc
Standard	API 6D,API 594,BS 1868,ASME B16.34
Face to face	ASME B16.10
Connection end	ASME B16.5,ASME B16.25
Test tandard	API 598,ISO 5208
Operation	Auto
Application fields	electric power industry, petroleum refining, petrochemical industry, offshore oil, chemical industry and etc.
Seal material	13Cr, STL, rubber
Remark1	Apply to prevent the backflow of medium in the pipeline or the device.
Remark2	Large size check valve with hydraulic damping cylinder to prevent crash between disc and seat.