Check Valve

A: Water hammer occurs when a fluid column stops abruptly and slams a standard valve shut, creating severe shock waves. Our silent check valves use a high-purity stainless steel spring that exerts constant back pressure on the disc. As fluid pressure drops or a pump shuts down, the spring forces the disc to close before the fluid column reverses direction. This proactive closure prevents slamming, eliminates acoustic vibration, and protects piping infrastructure.

A: It depends entirely on the mechanical configuration you select. Our flanged swing check valves rely partly on gravity to bring the disc back to the seat, meaning they perform optimally in horizontal runs or vertical lines with upward flow. However, our spring-loaded silent check valves do not depend on gravity or fluid backflow to shut. The internal spring handles the mechanical reset, allowing them to be installed in any orientation—vertical, horizontal, or angled—without compromising sealing integrity.

A: For lines with particulate content, we recommend our rubber flap check valves or ductile iron swing check valves configured with high impurity tolerance. These designs feature clear internal flow channels that pass suspended solids (up to $\le 3\text{ mm}$ depending on valve size) without the risk of jamming the internal assembly. Additionally, the resilient NBR or EPDM seating material encapsulates smaller debris upon closure to maintain a bubble-tight, zero-leakage seal.

A: For our standard sizes (2” to 12”) and standard ductile iron configurations, we maintain stock reserves that can ship within 1 to 2 weeks. For custom corporate orders involving proprietary casting logos, specialized nameplates, non-standard alloy trims, or larger volume production runs, the lead time ranges from 4 to 8 weeks depending on casting line schedules and raw material procurement.