4 Inch Flanged Check Valve

These valves offer several benefits: they create very little resistance to flow when open, are generally economical to purchase and install, have a simple design with few moving parts, provide reliable operation in suitable applications, and typically require minimal maintenance under normal operating conditions.

While versatile, swing check valves aren't suitable for every situation. They generally don't work well in vertical pipes with downward flow, may not perform optimally with pulsating flows or at very low flow rates, can be susceptible to water hammer in some conditions, require adequate space for the disc to swing open fully, and might not be the best choice for fluids containing large amounts of solids or very high viscosity liquids.

The most critical rule is to ensure the valve is installed in the correct orientation. There is always an arrow on the valve body indicating the required flow direction-this must match the flow in your pipe. For horizontal pipes, the disc hinge pin should be horizontal. For vertical pipes, flow must be upward, and specific models designed for vertical use are recommended. Always provide adequate straight pipe before and after the valve for optimal performance.