DN80-PN40-RF Axial Check Valve

DN80-PN40-RF Axial Check Valve

Nominal Size DN80
Pressure Rating 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
Body Material WCB (Carbon Steel) / CF8M (316 SS) / Ductile Iron
Disc / Trim Stainless steel (CF8M) with optional Stellite hardfacing

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Axial Check Valve – Technical Data Sheet

Size: DN80 | Pressure: PN40 | Connection: Flanged RF | Axial Flow Design

Item

Specificazione

Product Name

Axial Flow Check Valve (Nozzle Type / Non‑Slamming)

Dimensione nominale

DN80

Valutazione della pressione

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

Materiale del corpo

WCB (Carbon Steel) / CF8M (316 SS) / Ductile Iron

Disc / Trim

Stainless steel (CF8M) with optional Stellite hardfacing

Sigillatura

Metal‑to‑metal or soft seated (PTFE / NBR) optional

Spring Material

Stainless steel (316)

Intervallo di temperatura

-29°C ~ +425°C (depending on materials)

Applicable Media

Water, steam, oil, gas, chemicals, petrochemicals

  1. Main Parts & Materials

Component

Material (Standard)

Optional Material

Corpo

WCB (carbon steel)

CF8M (316 SS), CF3M (316L), Ductile Iron (GGG40)

Disc (Piston)

CF8M (316 SS)

CF8 (304 SS), duplex, with Stellite overlay

Posto a sedere

Integral with body, Stellite faced

PTFE insert (soft seated)

Primavera

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)

  1. 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).

  1. Axial Check Valve Design Features
  1. Axial Flow Path – Streamlined, straight‑through design with minimal pressure drop compared to conventional swing or lift check valves.
  2. Non‑Slamming Operation – Spring‑assisted disc returns to seat before flow reversal occurs, eliminating water hammer and noise.
  3. Centre‑Guided Disc – Accurate alignment, low wear, and stable operation even at low flow velocities.
  4. Compact Wafer Design – Short face‑to‑face length, lightweight, easy to install between existing flanges.
  5. Bidirectional or Unidirectional – Standard design is unidirectional; optional double‑directional available.
  6. Low Opening Pressure – Spring rate optimized for low cracking pressure (typically 0.02 – 0.05 MPa), suitable for pump protection.
  1. 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

  1. Applicazioni
  • 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)
  1. 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

  1. 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

  1. 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.

GARANZIA:

SAVVY VALVES si impegna a fornire una qualità di prodotto eccezionale e un servizio post-vendita senza pensieri. Le nostre valvole sono garantite per una durata minima di 12 mesi, durante i quali forniremo gratuitamente tutti i pezzi di ricambio necessari e istruzioni di manutenzione dettagliate. Durante il periodo di garanzia, in caso di danni non causati dall'uomo, sostituiremo i componenti gratuitamente e forniremo supporto tecnico professionale. Dopo la scadenza della garanzia, i clienti dovranno pagare solo il costo dei pezzi di ricambio, beneficiando comunque di servizi di manutenzione scontati. Il nostro obiettivo è aiutare i clienti a ridurre i costi operativi e a migliorare l'efficienza produttiva attraverso una qualità affidabile e un supporto post-vendita completo. Che si tratti di richieste tecniche o di esigenze di manutenzione, il nostro team di esperti risponderà tempestivamente per garantire che il vostro sistema di valvole mantenga prestazioni ottimali in ogni momento.

 


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