Axial Check Valve – Technical Data Sheet
Size: DN80 | Pressure: PN40 | Connection: Flanged RF | Axial Flow Design
Item | Spécification |
Product Name | Axial Flow Check Valve (Nozzle Type / Non‑Slamming) |
Taille nominale | DN80 |
Pression nominale | PN40 (4.0 MPa / 40 bar / 580 psi) |
Connection Type | Flanged, Raised Face (RF) |
Flange Standard | EN 1092‑1 (Type B1 or B2) / ASME B16.5 optional |
Design Standard | API 594 (Type B – wafer or lug) or manufacturer specific |
Face‑to‑Face Dimension | Wafer type: per API 594 / EN 558 Series 48 (approx. 60 – 70 mm) |
Construction | Axial flow – streamlined body, centre‑guided disc, spring‑assisted closure |
Matériau du corps | WCB (Carbon Steel) / CF8M (316 SS) / Ductile Iron |
Disc / Trim | Stainless steel (CF8M) with optional Stellite hardfacing |
Scellage | Metal‑to‑metal or soft seated (PTFE / NBR) optional |
Spring Material | Stainless steel (316) |
Plage de température | -29°C ~ +425°C (depending on materials) |
Applicable Media | Water, steam, oil, gas, chemicals, petrochemicals |
- Main Parts & Materials
Composant | Material (Standard) | Optional Material |
Corps | WCB (carbon steel) | CF8M (316 SS), CF3M (316L), Ductile Iron (GGG40) |
Disc (Piston) | CF8M (316 SS) | CF8 (304 SS), duplex, with Stellite overlay |
Siège | Integral with body, Stellite faced | PTFE insert (soft seated) |
Printemps | 316 SS | Inconel, Hastelloy |
Guide / Shaft | 316 SS | 17‑4PH, Monel |
Gasket | Spiral wound (SS + graphite) | PTFE, graphite sheet |
Bolting | A193 B7 / A194 2H (for WCB body) | A193 B8 / A194 8 (for SS body) |
- Dimensions & Weight (Wafer Type – Reference)
Dimension | mm (approx.) | inch (approx.) |
Face‑to‑Face (L) | 65 – 75 | 2.56 – 2.95 |
Flange Compatibility | PN40 EN 1092‑1 | – |
Outer Diameter (flange OD) | 200 (for PN40 DN80 flange) | 7.87 |
Overall Length (including flanges) | depends on mating flanges | – |
Weight (valve body only) | ~6 – 10 kg | ~13 – 22 lbs |
Note: Wafer type axial check valves are installed between flanges. Face‑to‑face follows EN 558 Series 48 (basic series 48 for wafer check valves).
- Axial Check Valve Design Features
- Axial Flow Path – Streamlined, straight‑through design with minimal pressure drop compared to conventional swing or lift check valves.
- Non‑Slamming Operation – Spring‑assisted disc returns to seat before flow reversal occurs, eliminating water hammer and noise.
- Centre‑Guided Disc – Accurate alignment, low wear, and stable operation even at low flow velocities.
- Compact Wafer Design – Short face‑to‑face length, lightweight, easy to install between existing flanges.
- Bidirectional or Unidirectional – Standard design is unidirectional; optional double‑directional available.
- Low Opening Pressure – Spring rate optimized for low cracking pressure (typically 0.02 – 0.05 MPa), suitable for pump protection.
- Performance Characteristics
Characteristic | Value |
Cracking Pressure | ≤ 0.03 MPa (0.3 bar) for standard spring |
Maximum Operating Pressure | 4.0 MPa (PN40) |
Maximum Operating Temperature | 425°C (with graphite seals) |
Leakage Rate | Zero leakage (soft seat) / Class IV (metal seat) |
Flow Coefficient (Cv) | High – typically >0.8 x pipe Cv due to streamlined design |
- Applications
- Pump discharge protection (water, oil, chemical pumps)
- Boiler feedwater systems
- Compressed air and gas lines
- HVAC and district heating
- Refining and petrochemical plants
- Marine and offshore (with stainless steel body)
- Testing & Compliance
Test | Standard / Requirement |
Shell Test | 1.5 × PN40 (6.0 MPa) – no leakage |
Seat Test (low pressure) | 0.6 MPa (6 bar) – per API 598 |
Seat Test (high pressure) | 1.1 × PN40 (4.4 MPa) – zero leakage for soft seat |
Hydrostatic strength | EN 12266‑1 / API 598 |
Material Traceability | EN 10204 3.1 (optional) |
Marking | EN 19 / MSS SP‑25 |
- Advantages Over Conventional Check Valves
Feature | Axial Check Valve | Swing / Lift Check Valve |
Pressure drop | Very low | Moderate to high |
Water hammer | Virtually eliminated | Common (disc slams) |
Installation orientation | Horizontal or vertical (flow upward) | Usually horizontal |
Cracking pressure | Low (0.03 MPa) | Higher (0.05 – 0.1 MPa) |
Space required | Short face‑to‑face | Longer |
- Ordering Information
Please specify:
- Valve size: DN80
- Pressure rating: PN40
- Connection type: Flanged RF
- Body material: WCB / CF8M / Ductile Iron
- Seat type: Metal / Soft (PTFE)
- Spring material: 316 SS / Inconel
- Special requirements: Low cracking pressure, high temperature (>400°C), NACE, etc.
Notes:
- Axial check valves are bidirectional only if specially ordered; standard design is unidirectional (flow direction arrow on body).
- Wafer type requires appropriate flange bolting length (longer than standard due to valve body thickness).
- For high‑temperature steam service (above 350°C), a metal‑seated version with flexible graphite seals is mandatory.
- Dimensions and weights are typical; confirm with manufacturer drawings.
GARANTIE :
SAVVY VALVES s'engage à fournir des produits d'une qualité exceptionnelle et un service après-vente sans souci. Nos vannes sont garanties pour une durée de vie minimale de 12 mois, période durant laquelle nous fournissons gratuitement toutes les pièces de rechange nécessaires et des instructions d'entretien détaillées. Pendant la période de garantie, en cas de dommage non causé par l'homme, nous remplaçons gratuitement les composants et fournissons une assistance technique professionnelle. Après l'expiration de la garantie, seuls les pièces de rechange sont à votre charge, tout en bénéficiant de services de maintenance à prix réduits. Notre objectif est d'aider nos clients à réduire leurs coûts d'exploitation et à optimiser leur production grâce à une qualité fiable et un service après-vente complet. Qu'il s'agisse de questions techniques ou de besoins de maintenance, notre équipe d'experts répondra rapidement pour garantir le fonctionnement optimal de votre système de vannes.