Axial Check Valve – Technical Data Sheet
Size: DN80 | Pressure: PN40 | Connection: Flanged RF | Axial Flow Design
Item | Spezifikation |
Product Name | Axial Flow Check Valve (Nozzle Type / Non‑Slamming) |
Nenngröße | DN80 |
Druckbewertung | 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 |
Gehäusematerial | WCB (Carbon Steel) / CF8M (316 SS) / Ductile Iron |
Disc / Trim | Stainless steel (CF8M) with optional Stellite hardfacing |
Versiegelung | Metal‑to‑metal or soft seated (PTFE / NBR) optional |
Spring Material | Stainless steel (316) |
Temperaturbereich | -29°C ~ +425°C (depending on materials) |
Applicable Media | Water, steam, oil, gas, chemicals, petrochemicals |
- Main Parts & Materials
Component | Material (Standard) | Optional Material |
Körper | WCB (carbon steel) | CF8M (316 SS), CF3M (316L), Ductile Iron (GGG40) |
Disc (Piston) | CF8M (316 SS) | CF8 (304 SS), duplex, with Stellite overlay |
Sitz | Integral with body, Stellite faced | PTFE insert (soft seated) |
Frühling | 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 |
- Anwendungen
- 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 steht für herausragende Produktqualität und einen sorgenfreien Kundendienst. Unsere Ventile haben eine garantierte Mindestlebensdauer von 12 Monaten. Innerhalb dieser Zeit liefern wir Ihnen kostenlos alle notwendigen Ersatzteile und detaillierte Wartungsanleitungen. Bei nicht menschlich verursachten Schäden innerhalb der Garantiezeit ersetzen wir Komponenten kostenlos und bieten professionellen technischen Support. Nach Ablauf der Garantie zahlen Sie lediglich die Kosten für Ersatzteile und profitieren weiterhin von vergünstigten Wartungsleistungen. Unser Ziel ist es, Kunden durch zuverlässige Qualität und umfassenden Kundendienst dabei zu unterstützen, Betriebskosten zu senken und die Produktionseffizienz zu steigern. Ob technische Anfragen oder Wartungsbedarf – unser Expertenteam reagiert umgehend, um sicherzustellen, dass Ihr Ventilsystem jederzeit optimal funktioniert.