An ANSI 150# flange end swing check valve with a cast steel ASTM A216 WCB body, A105 + F6 seat and 13% chrome faced disc. 1½″ to 6″ — the only variant above 4″, and the only one rated to 425 °C. Shell tested 3.0 MPa, graphite gasket.
State the size, the working temperature and the flow direction — quotes within 2 working hours.
| Ends | ANSI 150# flange — must match your pipework |
|---|---|
| Range | 1½″ to 6″ (DN40–DN150), seven sizes |
| Pressure | 150# |
| Temperature | −29 °C to 425 °C |
| Body and disc | Cast steel ASTM A216 WCB |
| Gasket | SS304 + graphite |
| Shell / seal test | 3.0 MPa / 2.2 MPa |
| Moving parts | One — the disc, on its hinge pin |
The seven-size dimension table with part numbers, the 9-item bill of materials and the test-pressure table are all on this page, as printed in the catalogue.
Cast carbon steel body, 13% chrome seat faces, graphite gasket.
A disc on a hinge inside a cast ASTM A216 WCB body, with ANSI 150# flanges at both ends, in 1½″ to 6″ (DN40 to DN150). Forward flow lifts the disc clear of the bore; when flow stops, the disc falls shut onto its seat.
What separates it from the other four swing check variants is heat. Its gasket is SS304 + graphite, not PTFE, and graphite takes far more temperature. That is why this variant states −29 to 425 °C where the threaded SS316 stops at 180 °C and three others state no temperature at all.
The only one of the five that states a temperature above 180 °C. The graphite gasket is what buys it; PTFE would not get there.
Seven sizes, 1½″ to 6″. The other four stop at 4″ or 2″. If the line is bigger than 4″, this is the only swing check available.
Body, disc, hinge and bonnet are cast carbon steel A216 WCB. For corrosive duty, use the SS316 variant on the same flange.
The seat is A105 + F6 and the disc is WCB + F6 — 13% chrome stainless on the two faces that press against each other thousands of times. Far harder and more erosion-resistant than the bare WCB behind them.
The disc, on an A276 410 hinge pin. No handle, no stem, no actuator. Nine items on the parts list in total.
A193 Gr.B7 bolts with Gr.2H nuts. The disc, hinge and pin come out through the top — leave headroom above the valve, not just length in the run.
All photographs of the stocked item, not renders.
A heavy cast body with the bolted bonnet above it. That ribbed shape is the A216 WCB casting.
“AF · 1½ · 150 · WCB” cast into the body. The maker's mark, size, class and material are all in the casting, so the valve can be identified on the wall with no paperwork.
Raised face and bolt holes. This is the face that has to match your pipework — bolt circle D1 and hole pattern z-d in the size table.
How you get at the disc. Undo the bolts and the disc, hinge and pin come out through the top — so check the overhead clearance before fitting.
Everything that goes on a purchase order.
| Item | Detail |
|---|---|
| Size range | 1½″ to 6″ (DN40 to DN150) |
| End connection | Flensa ANSI 150# |
| Working pressure | 150# |
| Working temperature | −29 °C to 425 °C |
| Body and disc | Cast steel ASTM A216 WCB |
| Gasket | SS304 + graphite |
| Shell test | 3.0 MPa |
| Seal test | 2.2 MPa |
| Moving parts | One — the disc, on its hinge pin |
| Parts in the list | 9 |
| Operation | Automatic. No handle, stem or actuator |
| Orientation | Aliran mengikuti panah cor · bonnet ke atas pada jalur horizontal · aliran ke atas pada jalur vertikal |
| Not an isolating valve | Pasang gate valve atau ball valve juga kalau Anda perlu menutup jalur |
| Stock | Gudang Singapura & Malaysia — keluar dalam 24 jam |
Seven sizes, dimensions in millimetres. L face-to-face is the gap it needs in the run; D1 the bolt circle and z-d the hole pattern have to match the mating flange.
| Size | Part no | Flange OD D | Bolt circle D1 | Raised face D2 | Bore d | Height H | Face-to-face L | Bolts z-d |
|---|---|---|---|---|---|---|---|---|
| 1½″ | VL-CS-SC-F-150-24 | 127 | 98.5 | 73 | 38 | 115 | 162.5 | 4-16 |
| 2″ | VL-CS-SC-F-150-32 | 152 | 120.7 | 95 | 51 | 145 | 200 | 4-19 |
| 2½″ | VL-CS-SC-F-150-40 | 177.8 | 139.7 | 108 | 64 | 150 | 212 | 4-19 |
| 3″ | VL-CS-SC-F-150-48 | 190.5 | 152.4 | 127 | 76 | 185 | 241 | 4-19 |
| 4″ | VL-CS-SC-F-150-64 | 229 | 190.5 | 157 | 102 | 215 | 288 | 8-19 |
| 5″ | VL-CS-SC-F-150-80 | 254 | 216 | 185.7 | 127 | 245 | 325 | 8-22 |
| 6″ | VL-CS-SC-F-150-96 | 281 | 241.3 | 216 | 152 | 260 | 356 | 8-22 |
Flange thickness b is 15 mm at 1½″, 16 mm at 2″, 19 mm at 2½″ and 3″, then 24 mm from 4″ up — as printed.
356 mm face-to-face at 6″ and 288 mm at 4″. If the gap in your run is shorter, a wafer-bodied dual plate check puts similar internals into far less space.
260 mm at 6″. The bonnet lifts off upward to get the disc out — leave more headroom than that figure.
ANSI 150# will not bolt to a JIS 10K flange, whatever the pressure rating says.
38 mm at 1½″, 51 mm at 2″, 152 mm at 6″ — a fully open disc lifts clear of the bore, so the pressure drop is low.
This table carries no weight column. For support calculations, ask us and we will weigh a stocked unit — a 6″ flanged valve is not light.
Numbered to match the parts list below. The section shows the disc on its hinge pin, the F6-faced seat it lands on, and the bolted bonnet that has to come off to get it out.
| No | Part name | Material |
|---|---|---|
| 1 | Body | ASTM A216 WCB |
| 2 | Seat | ASTM A105 + F6 |
| 3 | Disc | ASTM A216 WCB + F6 |
| 4 | Hinge | ASTM A216 WCB |
| 5 | Hinge Pin | ASTM A276 410 |
| 6 | Gasket | SS304 + graphite |
| 7 | Bonnet | ASTM A216 WCB |
| 8 | Bonnet Bolt Nut | ASTM A193 Gr.2H |
| 9 | Bonnet Bolt | ASTM A193 Gr.B7 |
SS304 + graphite, not PTFE. It is the one part that separates this variant from the other four, and the reason it states 425 °C.
13% chrome stainless on the two faces that press against each other. The body itself is bare WCB — this is not a stainless valve.
Martensitic stainless, chosen for hardness: this pin carries the whole swinging load of the disc every time the valve closes.
A193 Gr.B7 bonnet bolts with Gr.2H nuts — the same alloy-steel pressure bolting used on the cast steel flange end ball valves.
The disc. No stem, no packing, no gland — so there is no external leak path other than the bonnet gasket.
Factory proof tests. Not working pressures.
| Item | Value |
|---|---|
| Nominal pressure | 150# |
| Shell pressure test | 3.0 MPa |
| Seal pressure test | 2.2 MPa |
| Air seal pressure test | 0.6 MPa |
| Max working temperature | −29 °C to 425 °C |
They are manufacturing proof tests well above the working rating. The valve is not intended to operate there.
The threaded SS316 stops at 180 °C; three variants state no temperature at all. If the duty is hot, this is the valve.
Shell 3.0 MPa and seal 2.2 MPa on both. What differs is not the pressure — it is the material and the temperature.
All five, side by side: the comparison table.
Dimensions and part numbers are in the catalogue, as printed; stock and price are not — send the list and we confirm both.
Because it is the only one of the five swing check variants that states a temperature above 180 °C: −29 to 425 °C. Its gasket is SS304 + graphite rather than PTFE, and graphite takes far more heat. The other four do not come close.
1½″ to 6″ (DN40 to DN150), seven sizes. This is the only swing check variant in the range that goes past 4″. Note the length: at 6″ it needs 356 mm of pipe run to itself.
No. Body, disc, hinge and bonnet are cast carbon steel ASTM A216 WCB. The seat and disc faces are F6 — 13% chrome stainless — and the hinge pin is A276 410. For corrosive duty, use the ANSI 150 SS316 variant on the same flange.
F6 is 13% chrome stainless steel. It is used as the seat face and the disc face because those are the two parts that press against each other thousands of times. A 13% chrome face is far harder and more erosion-resistant than the bare WCB behind it.
Shell 3.0 MPa, seal 2.2 MPa and air seal 0.6 MPa, at 150# nominal. Those are factory proof tests, not working pressures — do not design to them.
One — the disc, on its hinge pin. There is no handle, stem or actuator; the flow operates it. The parts list is nine items in total, and the bolted bonnet above is how you get at the disc.
Flow follows the arrow cast into the body; on a horizontal run the bonnet points up; on a vertical run flow must be upward. It must never be used on downward flow — for that use a spring check. The full rules.
No. An ANSI 150# flange does not mate with JIS 10K, whatever the pressure rating says. The bolt circle and hole pattern differ. For JIS pipework, use the JIS 10K SS316 variant.
Held in our Singapore and Malaysia warehouses, out within 24 hours of your PO; quotes within 2 working hours.
Related: all swing check valves · ANSI 150 SS316 if you need stainless · Y-strainers to fit upstream · gate valves for isolation.
