Non-Slam Axial Flow Check Valves
Non-Slam Axial Flow Check Valves
Axial Flow Check Valves are valves used to automatically prevent the reverse flow of media in a pipeline, using an internal spring as an actuator. Axial Flow Check Valves provide ‘Non-Slam’, millisecond response to flow reversal, greatly reducing pressure spikes developed from ‘Water-Hammer’ effect when compared to other types of check valves.
Sizes: NPS 2” – 80” | DN50-DN2000
Pressure Ratings: Up-to PN250 | Up-to #1500
Materials available: Ductile Iron, Carbon Steel, Stainless Steel, Exotic alloys. Other materials may be available on request.
Seat Options: Soft Seated (P.T.F.E seat), Metal Seated (material chosen as per application)
Face to face dimensions: Compact Pattern, Short Pattern, Long Pattern, Extra Long Pattern
For more detailed technical information, please download the Product Catalogue.
Optimized Spring design for low cracking pressures
1 of 6One-Piece body casting
2 of 6Reduced friction between moving parts
3 of 6Light Weight Disc
4 of 6Rapid Non-Seat options
5 of 6Multiple Valve Seat option
6 of 6Spring material and dimensions are chosen to offer millisecond response times, while minimizing operating pressure differential and maximizing life cycles.
The valve body is made using a single piece casting whose internal geometry generates a venturi effect. Being a solid piece, fugitive emissions from body joints are eliminated.
The disc’s linear motion is supported by guide rails that are hard faced using bronze and precisely machined to provide reliable, jamming-free operation of the valve for its usable life.
The disc profile is designed to minimize inertia and maximize flow area, improving the valve’s dynamic response.
Axial Flow Check valves are designed to respond in milliseconds to reversal of media flow. Rapid response times greatly reduce pressure surges developed compared to other check valves and minimize chances of damage to piping, pumps, surrounding environment and people.
The valve is offered with multiple seat material options, depending on nature of line media and requirement of fire safety. Soft seated valves are provided with a replaceable P.T.F.E seat ring. Metal seated valves are provided with a weld overlay of the appropriate material, which is precisely machined to generate the necessary sealing geometry.
