Swing check valve
As a swing check valve manufacturer from china,Judberd can supply below types swing check valves
Material Ductile iron
Use water pipeline
Connection flange end
Design ,manufacture
conforms to BS EN12334
Material Ductile iron
Use water pipeline
Connection flange end
Design ,manufacture
conforms to MSS SP-71
Material Ductile iron
Use water pipeline
Connection flange end
Design ,manufacture
conforms to BS5153\DIN3202-F6
material Ductile iron
Use water pipeline
Connection flange end
Design ,manufacture
conforms to MSS SP-71
Material Ductile Iron
Use Water Pipeline
Connection Flange End
Design ,Manufacture
Conforms To
BS EN1074-3/BS EN12334/AWWA C508
Material Ductile Iron
Use Water Pipeline
Connection Flange End
Design ,Manufacture
Conforms To
BS EN1074-3/BS EN12334/AWWA C508
Swing Check Valve With Counterweight
Material Ductile Iron
Use Water Pipeline
Connection Flange End
Design ,Manufacture Conforms To BS 5153
Judberd swing check valve advantage
As a professional swing check valve manufacturer,we always focus on research and design for our swing check valve,and we updated our swing check valve design recently,our new swing check valve have below advantage
1)The valve discs are common, same disc can work well on every same size swing check valve body,so if there is a problem with a valve disc, it can then be replaced with a valve disc from stock. No need to check if the seal is good or not between disc and valve body,This reduces the previous short service life of the valve disc, which reduced the service life of the whole valve.
2)We changed the pin for the disc to be inside the valve body,so no need to punch hole in the valve body,that means the problem of leaks in the valve body due to drilling has been completely eliminated.
3)Because of our above 2 designs,there almost have no other quality problems in the check valve. And because we have a common designed valve disc which can fitted with each same size valve, and the valve disc can be replaced by directly open the valve cover, so there is no need to disassemble the flanges end of the check valve, which improves the working efficiency of the pipeline
Why Swing Check Valve With Counterweight？
The on-off of the swing check valve depends entirely on the water pressure. When the liquid pressure is greater than the opening pressure, the water pressure push the valve disc opens, and when the liquid pressure is less than the opening pressure, the valve disc closes because of the gravity of the valve disc itself, because the swing check valve has no additional device for controlling the disc. (such as the spring of the Silent Check Valve, the oil cylinder of the Tilting Check Valve), so the switching speed of the valve disc depends entirely on the change of the liquid pressure. When the pressure decreases sharply in short time, the valve disc of the swing check valve will quickly close , colliding with the valve sealing ring on valve body, resulting in a huge sound, at the same time the valve disc is beaten, the valve stem is pulled by the valve disc, and the water hammer repeatedly hits in the pipeline, which will also cause damage to the check valve. If the pressure changes greatly and quickly for pipelines, it is necessary to add lever&weight on the swing check valve to reduce the closing speed of the valve. If you need to reduce the closing speed more, it is good choice to add the oil cylinder to further slow down the closing speed of the check valve.
Swing check valve types
Normally there are two types of swing check valves , one is the flap check valve(also called flapper check valve), the flap check valve has a very simple design with a body, cover, disc, bolts, nuts, seals gasket and pins, and the pins are not necessary. flap check valves can only be resilient seated check valve and cannot be metal seated check valve. The other type of swing check valve has a rocker arm which swings around the pin, this type of swing check valve can be either resilient seated check valve or metal seated check valve.
swing check valve diagram
Swing check valve with rocker arm(NO.10) and pin (NO.8)
flap check valve with pin (No 5) for flap
Flap check valve without pin for flap
Where to use swing check valve?
Swing check valve is suitable for various pipelines with nominal pressure PN1.0MPa~42.0MPa, Class150-2500; nominal diameter DN15~1200mm, NPS1/2~48; working temperature -196~540℃, used to prevent back flow of medium. By choosing different materials (Ductile iron ,WCB, CF8(M), CF3(M), 1Gr5Mo, 15CrMo1V, it can be applied to water, steam, oil, nitric acid, acetic acid, strong oxidizing medium and urea and other media. Mainly used in water,petroleum, chemical, pharmaceutical, fertilizer, electric power and other pipelines.
swing check valve installation
Swing check valves can be installed horizontally or vertically, but are generally more often installed horizontally. If the check valve is to be installed vertically, the direction of flow must be upwards.
