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PTFE lined swing check valve in short wafer pattern body with lined flange faces
Lined Valves

PTFE Lined Swing Check Valve

Wafer-pattern lined swing check, NB 3" to 14"

Short wafer-pattern lined swing check valve — only 38 mm to 88 mm face to face across NB 3" to 14", where a conventional check valve would need far more length.

Request a quotation Full technical data and dimensions Request the datasheet
At a glance
Product typeLined swing check valve, wafer pattern
Body / steel gradeASTM A 216 Gr. WCB
Lining materialPTFE / PFA / FEP
Liner standardASTM D 3307 (PFA), ASTM D 4894-19
Lining optionsVirgin or anti-static (conductive black) PTFE to ASTM D 4894 & D 4895, PFA to ASTM D 3307, FEP to ASTM D 2116
Flange standardASME/ANSI B16.5
Flange classClass 150 standard; Class 300 on request
Size rangeNB 3" to NB 14"

Product overview

What it does, and where it fits.

A swing check valve holds a hinged disc that opens with forward flow and swings shut against reverse flow. In this wafer pattern the whole valve occupies just 38 mm to 88 mm between flanges, against 127 mm to 300 mm for the lined non-return valve — which is what makes it fit where there is no room for a conventional check.

The body is a casting to ASTM A 216 Gr. WCB, lined and drilled to ASME/ANSI B16.5 Class 150. The range starts at NB 3" and runs to NB 14", covering the larger bores where check valve length and weight matter most.

Features

Built into every unit.

  • Wafer pattern — 38 mm to 88 mm face to face only
  • NB 3" to 14", covering the larger bores
  • Hinged disc opens with flow, swings shut against reversal
  • Cast body to ASTM A 216 Gr. WCB, lined and flanged to B16.5 Class 150
  • Stainless steel body on request

Benefits

Why it earns its place in the line.

  • Fits where a conventional check valve will not — a quarter of the length
  • Low weight and low installed cost on larger bores
  • Outstanding corrosion resistance to aggressive organic and inorganic chemicals across a wide temperature range
  • Non-stick, non-wetting bore — low surface energy keeps product moving and simplifies cleaning
  • Chemically inert and pure; no additives, plasticisers, stabilisers or lubricants to contaminate the process fluid
  • The lowest coefficient of friction of any solid, reducing pressure drop and deposit build-up

Applications & industries

Where it is specified.

Typical applications

  • Reverse flow prevention on large lined lines
  • Retrofit into pipework with no spare length
  • Pump discharge protection on larger bores
  • Common headers fed by multiple pumps

Industries served

  • Chemical processing
  • Pharmaceutical
  • Petrochemical
  • Oil & gas
  • Power generation
  • Pulp & paper
  • Mining & metallurgy
  • Agrochemicals & dyes

Technical data

Specification for PTFE Lined Swing Check Valve.

Figures below are for this product only — every item in the range carries its own dimension table.

PTFE Lined Swing Check Valve — technical specification
Product typeLined swing check valve, wafer pattern
Body / steel gradeASTM A 216 Gr. WCB
Lining materialPTFE / PFA / FEP
Liner standardASTM D 3307 (PFA), ASTM D 4894-19
Lining optionsVirgin or anti-static (conductive black) PTFE to ASTM D 4894 & D 4895, PFA to ASTM D 3307, FEP to ASTM D 2116
Flange standardASME/ANSI B16.5
Flange classClass 150 standard; Class 300 on request
Size rangeNB 3" to NB 14"
Temperature rangeContinuous service to 260 °C (PTFE melting point 327 °C, PFA 306 °C, FEP 260 °C)
Pressure ratingASME/ANSI B16.5 Class 150 flanges as standard; Class 300 available on request
Manufacturing standardASTM F 1545
Spark testingEvery lined component spark tested at 5000 × E volts (E = liner thickness in mm), to a maximum of 15 000 V
Hydro testingHydrostatic or pneumatic test according to the lining technique; hydrostatic test on components with vent holes
InspectionDimensional and visual examination of liner and steel parts — weld aspect, overall dimensions, collar size, liner thickness, surface flaws and paint thickness
External protectionZinc epoxy primer, minimum 60 μm dry film, over steel sand-blasted to SA 2.5
CertificationEN 10204 3.1 mill certificates and FDA certification for the fluoropolymer available on request
Face to face38 mm to 88 mm, tolerance ±3 mm
PTFE Lined Swing Check Valve — face to face and lining availability
SizeFace to face L (±3)PTFEPFAFEP
3"38—✓✓
4"52—✓✓
6"56—✓✓
8"60—✓✓
10"68—✓✓
12"78—✓✓
14"88—✓✓

All dimensions in mm. Note how short this is against the lined non-return valve — 38–88 mm versus 127–300 mm.

Available on request

  • Stainless steel body

FAQ

Questions we are asked about this item.

Use the swing check where length is tight or the bore is large — it is a quarter of the face-to-face length. Use the non-return valve on NB 1" to 2.5", which the swing check range does not cover.

A swing disc depends on flow and gravity to seat. Confirm the intended orientation with us so the valve is built for it.

Enquiry

Tell us your line size — we'll confirm the spec.

Send the bore, the media, the temperature and pressure, and the flange standard you work to. Drawings and custom sizes welcome.

Enquire on WhatsAppChat to us on +91 90336 30547 Request the datasheetWe will email the drawing for this item Talk to a technical expertMaterial selection and duty review Send a drawingWe fabricate to your isometric or sketch Request a custom sizeNon-standard bores, lengths and drilling

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Send your requirement — media, temperature, pressure, dimensions — and we'll recommend the right product or fabricate it.

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