POVE brand of Non-Slam Nozzle Check Valve. by POVE-US Valve LLC, Houston, Texas, USA. Size NPS 2” up to 36”. ASME class 150 up to 2500. Designed to API 6D and ASME B16.34. Tested to API 598 and ASME B16.34. Connection: FF flange, RF flange, RTJ flange, Butt Weld ends.
Non-Slam Nozzle Check Valve www.pove-us.com “POVE” brand and marking. “POVE-us” logo on nameplate. Horizontal flow. Unidirectional flow. Controls the flow of fluid in one direction. Prevents the backflow of fluid. Pressure rating: Class 150 up to 2500. Size range: NPS 1” up to NPS 36”; DN 50 up to DN 900. Connection: FF / RF / RTJ flange, Butt Weld (BW) ends. Long pattern, Short pattern. One piece body. Minimize water hammer effect. Metal seated. Option of soft seat/seal. Size Size Class 150 Class 300 Class 600 Class 900 Class 1500 Class 2500 NPS DN 1 25 Y Y Y Y Y Y 2 50 Y Y Y Y Y Y 2½ 65 Y Y Y Y Y Y 3 80 Y Y Y Y Y Y 4 100 Y Y Y Y Y Y 6 150 Y Y Y Y Y Y 8 200 Y Y Y Y Y Y 10 250 Y Y Y Y Y Y 12 300 Y Y Y Y Y Y 14 350 Y Y Y Y Y 16 400 Y Y Y Y Y 18 450 Y Y Y Y 20 500 Y Y Y Y 24 600 Y Y Y Y 30 750 Y Y 36 900 Y Y POVE-us Non-Slam Nozzle Check Valve r-13h Page 1 of 3 designed “Quality Valves… designed by American Engineers” Non-Slam Nozzle Check Valve www.pove-us.com Designed to API 6D and ASME B16.34. Inspected and tested to API 598 and ASME B16.34. Face to face according to ASME B16.10. Flange ends dimensions as per ASME B16.5 (for NPS 1” up to 24”). Series A or B Flange ends dimensions as per ASME B16.47 (for NPS 26” and larger). Materials: Carbon Steel, Low Temp Carbon Steel, Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Nickel Aluminium Bronze, Hastelloy, Inconel, Monel. Advantage of Non-Slam Nozzle Check Valve • Minimizes the damaging effects of water hammer in fluid systems. • Removal of chatter associated with conventional valves in reciprocating compressor service. • Protects rotating equipment from damage due to flow reversal. • Minimizes pressure loss in piping systems. • Provides quick dynamic response reducing reverse velocity. Beneficial Features • Few moving parts — Disc is the only moving part, minimizing wear. • Axial movement of disc — Disc and seating configuration give streamlined flow path with venturi effect, resulting in low pressure drop. • Short stroke of spring-assisted disc — Inlet flow velocity moves disc axially with short stroke. In response to flow velocity reduction, a compressed spring initiates valve closure and provides quick response. • Spring options — Choice of spring affects critical velocity and valve response. Selection is made on engineering evaluation of specific applications. In absence of this data, a standard spring will be provided. POVE-us Non-Slam Nozzle Check Valve r-13h Page 2 of 3 designed “Quality Valves… designed by American Engineers” Non-Slam Nozzle Check Valve www.pove-us.com HOW IT WORKS 1 When closed the valve disc is held against the seat by the spring and the back pressure. The disc lifts off the seat when the static pressure exceeds the force of the pre-loaded springs. 2 As the flow rate increases the disc moves toward the open position. 3 The valve is fully open at the opening velocity and the disc will sit stable against the diffuser when the velocity increases (no disc chatter). 4 When the flow decelerates, the spring provides a powerful closing force. 5 The valve closes just before the return flow starts (non-slam closure). POVE-us Non-Slam Nozzle Check Valve r-13h Page 3 of 3 designed “Quality Valves… designed by American Engineers”
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