Flex - Model 661 - Check Valve Brochure

Its simple, yet ingenious, design features a precision moulded fully-encapsulated steel disc, incorporating nylon reinforcement in the flex hinge. The ‘O’ ring profile seat face ensures a bubble-tight shut-off, preventing back flow at high and low working pressures. The seating surface is at a 45 degree angle, moderating disc travel and permitting optimum flow rates. The disc’s resulting 35 degree stroke is less than half the typical 80 or 90 degrees of a traditional swing check valve. Combine this with its flexible action and this results in significantly reduced valve closing time, flow reversal and both slam and ‘water hammer’ effects. All this enables installations in far more varied applications than traditional swing check valves. Close coupling to pumps, tees, other valves or accessories is also not a problem for this versatile product.