TECHNICAL DATA SHEET
Axial Silent Check Valve
Ductile Iron Body · Bronze Trim
The Axial Silent Check Valve (also referred to as axial flow non-slam check valve) is a spring-assisted, automatic non-return valve designed to prevent reverse flow and protect pumping equipment from damaging water hammer and pressure transients. Featuring a streamlined venturi-pattern flow path with an integral flow guide, this valve provides minimal pressure drop, silent operation, and rapid spring-assisted closure.
Constructed with a ductile iron body and bronze trim, this valve offers an optimal balance of corrosion resistance, strength, and cost-effectiveness for municipal water, HVAC, irrigation, and industrial pumping applications. The spring-loaded disc closes at near-zero flow velocity, ensuring positive shut-off before flow reversal occurs, thereby eliminating slamming and surge.
Feature | Descripción |
Tipo de válvula | Axial flow, spring-assisted silent check valve (non-slam) |
Body Design | One-piece ductile iron body eliminates leak paths for superior performance |
Flow Path | Streamlined venturi/axial design with integral straightening vanes for laminar flow and minimal head loss |
Disc Mechanism | Center-guided, spring-loaded poppet-type disc with short stroke for rapid closure |
Closure | Spring-assisted closure at approximately ½ psi positive head on inlet port, preventing water hammer |
Trim Material | Bronze (aluminum bronze) – provides excellent corrosion resistance and wear properties |
Mounting Orientation | Suitable for horizontal or vertical installation (vertical with upward flow) |
Maintenance | Low maintenance design with durable internal components |
3.1 General Parameters
Parámetro | Especificación |
Size Range | DN50 – DN600 (2″ – 24″) |
Pressure Ratings | PN10 / PN16 / Class 125 / Class 150 / Class 300 |
Estándares de diseño | API 594, ASME B16.34, ISO 5752 |
Face-to-Face Dimensions | ASME B16.10, EN 558, API 609, BS 5155, DIN 3202 |
Flange Accommodation | ASME B16.42, DIN PN10/PN16, BS 4504, ISO 7005 |
End Connections | Wafer type, flanged (RF, FF), plain face |
3.2 Operating Conditions
Parámetro | Especificación |
Maximum Working Pressure | 2.5 MPa (25 bar) / Class 300 |
Maximum Pressure (Ductile Iron) | 640 PSI @ 100°F (Class 300 WOG, non-shock) |
Operating Temperature (Valve) | -34°C to +121°C (-30°F to 250°F) |
Maximum Temperature (Bronze Trim) | 316°C (600°F) |
Allowable Continuous Use Temp. | 0°C to +80°C (standard service) |
Componente | Material | Grade / Standard |
Cuerpo | Ductile Iron (DI) | ASTM A395 Gr. 60-40-18 / ASTM A536 |
Desct | Bronze / Aluminum Bronze | ASTM B148 / CA377 |
Trim | Bronze (Aluminum Bronze) | Unleaded bronze composition |
Asiento | Metal seat (Bronze) or Resilient (EPDM/NBR) | Metal-to-metal or soft-seal option |
Primavera | Stainless Steel (316 SS) | ASTM A313 Gr. CF8M |
Guide / Bushing | Bronze / Stainless Steel | — |
O-Ring / Seals | Buna-N (NBR) / EPDM / Viton® | Various elastomer options |
Note: Bronze trim provides excellent corrosion resistance, low friction operation, and is NSF/ANSI 61 and 372 approved for potable water applications.
Test | Requirement |
Body Shell Test | 1.5 × rated pressure (hydraulic) |
Seat Leak Test | 1.1 × rated pressure |
Allowable Seat Leakage | Meets or exceeds API 598 leakage requirements |
Closure Characteristic | Silent, non-slam closure at near-zero flow velocity |
Water Hammer Prevention | Spring-assisted disc closes before flow reversal occurs |
Bubble-tight Seal | Available with resilient seat option |
Dimensions are for reference. Consult factory for specific drawings.
DN | Face-to-Face (mm) | Approx. Weight (kg) |
50 | 120 | — |
65 | 150 | — |
80 | 180 | — |
100 | 229 | — |
125 | 254 | — |
150 | 267 | — |
200 | 292 | — |
250 | 330 | — |
300 | 356 | — |
Face-to-face dimensions per GB/T 12221 / EN 558.
Option | Details |
Seat Materials | Metal seat (standard), EPDM, Buna-N (NBR), Viton® (FKM), RPTFE |
Body Materials | Ductile iron (standard), Carbon steel, Stainless Steel 316 |
Disc Materials | Bronze, Stainless Steel 316, Ductile Iron with coating |
Spring Materials | Stainless Steel 302, 316 |
End Connections | Wafer, lug, flanged (RF, FF) |
Pressure Classes | Class 125, 150, 300 |
Coating | Epoxy coating internal/external for enhanced corrosion resistance |
Estándar | Descripción |
API 594 | Check valves: wafer, lug, and double-flanged types |
ASME B16.34 | Valves — Flanged, threaded, and welding end |
ASME B16.10 | Face-to-face dimensions |
ASME B16.42 | Ductile iron pipe flanges and flanged fittings |
ISO 5752 | Face-to-face dimensions for valves |
API 598 | Valve inspection and testing |
MSS SP72 | Ball valves with flanged or butt-welding ends for general service |
NSF/ANSI 61 & 372 | Drinking water system components – health effects & lead content |
GARANTÍA:
SAVVY VALVES se compromete a ofrecer una calidad de producto excepcional y un servicio posventa sin complicaciones. Nuestras válvulas tienen una vida útil mínima garantizada de 12 meses, durante los cuales suministraremos todos los repuestos necesarios e instrucciones detalladas de mantenimiento de forma gratuita. Durante el período de garantía, si se produce algún daño no provocado por el hombre, reemplazaremos los componentes sin coste alguno y ofreceremos soporte técnico profesional. Una vez vencida la garantía, los clientes solo deberán pagar el coste de los repuestos y seguirán beneficiándose de descuentos en los servicios de mantenimiento. Nuestro objetivo es ayudar a los clientes a reducir los costes operativos y mejorar la eficiencia de la producción mediante una calidad fiable y un soporte posventa integral. Ya sea para consultas técnicas o necesidades de mantenimiento, nuestro equipo de expertos responderá con prontitud para garantizar que su sistema de válvulas mantenga un rendimiento óptimo en todo momento.
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