Pragmaticus offers a wide range of valves for industrial applications. The valves are easy and economical way to control and check the flows. No doubt, a valve is more than just an industrial device for turning on and shutting off the flows of fluids and gases.
There are two general groups: stop and check valves (so-called basic valves’ types). Besides, more complicated industrial valves for special, sometimes unique application are also made. All existing valves can’t be classified as easy as “stop” and “check” types as well as all industrial requirements can’t be divided into two groups only. (more…)
Posts Tagged ‘check valves’
How to choose valve according to industrial requirements
Monday, December 14th, 2009Swing check valves
Monday, November 23rd, 2009Swing type is the one of the check valves (name also clack valve, non-return valve or one-way valve). Check valves’ main function is to allow fluid (liquid or gas) to flow through it in only one direction. Therefore, there are some technology features of each type.
A swing check valve has a butterfly shape, where the disc, the movable part used to block the flow, that is why it swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle.
Turbulence and pressure drop within the valve are very low what makes them more demanded. The next reason why this type of valves is widespread in industrial application is that swing check valves allows full, unobstructed flow and automatically closes as pressure decreases. These valves are fully closed when the flow reaches zero and prevent back flow. (more…)
