8 Products in this range
A valve is the one component in a line that has to work perfectly on the day it is finally needed. Ours are built around that: machined seats, tested shells, and a seat leakage check on every unit before it is packed.
The range covers two quite different duties. Ball, gate, globe and check valves handle liquids, gas and steam in conventional process piping. Rotary airlock, double dump, double cone and knife gate valves handle powders, ash, clinker and slurry — abrasive service where a standard valve simply will not survive.
Eight valve families, supplied to your line size, pressure class and material specification.
01
A vaned rotor turning inside a machined housing that meters powder or granular material out of a hopper while holding back the pressure difference across it. Rotor-to-body clearance is set tight enough to seal the air and loose enough not to grind, which is where the machining accuracy earns its keep.
02
Two counter-weighted flap gates mounted one above the other. They never open at the same moment, so material passes down through the chamber between them while the air seal is never broken — the standard discharge for ESP and bag-filter ash hoppers.
03
A pair of cones seating in series to isolate a pressurised vessel from atmosphere while abrasive solids are let down. The conical seat wears evenly rather than channelling, which makes it the preferred choice on clinker, coal and mineral duty.
04
A sharpened gate that cuts straight through slurry, pulp, fibre and settled solids instead of trying to close on top of them. The thin wafer body drops into a short face-to-face gap, so it retrofits where a conventional gate valve will not fit.
05
Quarter-turn isolation with a bubble-tight shut-off and negligible pressure drop when open. Supplied floating or trunnion mounted, in two-piece and three-piece bodies, with full or reduced bore to suit the line. Valves up to 30" NB in ASME Class 600 have already been supplied, and the shop can build trunnion-mounted valves up to 48" NB for large-bore pipeline and header duty.
06
Full-bore isolation for lines that stay either fully open or fully shut. The wedge lifts clear of the flow path, so there is almost no pressure drop and no turbulence — which is exactly why gate valves should never be used for throttling.
07
Built for regulation. The disc moves perpendicular to the seat, which gives fine, repeatable control of flow and lets the seating surfaces be re-machined rather than replaced. Straight, angle and Y-pattern bodies are available.
08
Non-return protection that closes on reverse flow with no operator and no signal. Swing, lift, piston and dual-plate types are supplied — the dual plate being the lightest and quickest to close, which limits water hammer on pump discharge lines.
Body, bonnet and trim are selected together so that galling and galvanic issues never arise in service.
Swipe the table sideways to see all columns.
| Service | Cast Body | Forged Body | Trim |
|---|---|---|---|
| General Carbon Steel | ASTM A216 WCB | ASTM A105 | 13% Cr, SS 410 |
| Low Temperature | ASTM A352 LCB / LCC | ASTM A350 LF2 | SS 304, SS 316 |
| Stainless Steel | ASTM A351 CF8 / CF8M | ASTM A182 F304 / F316 | SS 316, Stellite faced |
| High Temperature Alloy | ASTM A217 WC6 / WC9 / C12A | ASTM A182 F11 / F22 / F91 | Stellite 6, 13% Cr |
| Duplex | ASTM A995 4A / 5A | ASTM A182 F51 / F53 | Duplex, Stellite faced |
| Abrasive Bulk Solids | Ductile iron, fabricated CS | — | Hardfaced / Ni-hard liner |
Valves for sour service are supplied in accordance with NACE MR0175 / ISO 15156 where the enquiry requires it.
Typical composition of the common valve body castings and forgings, percent by weight.
Swipe the table sideways to see all columns.
| Grade | C | Mn | Si | P max | S max | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|---|
| A216 WCB | 0.30 max | 1.00 max | 0.60 max | 0.035 | 0.035 | 0.50 max | 0.50 max | 0.20 max |
| A352 LCB | 0.25 max | 0.70 max | 0.60 max | 0.035 | 0.035 | 0.50 max | 0.50 max | 0.20 max |
| A351 CF8 | 0.08 max | 1.50 max | 2.00 max | 0.040 | 0.040 | 18.0–21.0 | 8.0–11.0 | 0.50 max |
| A351 CF8M | 0.08 max | 1.50 max | 1.50 max | 0.040 | 0.040 | 18.0–21.0 | 9.0–12.0 | 2.0–3.0 |
| A217 WC6 | 0.05–0.20 | 0.50–0.80 | 0.60 max | 0.040 | 0.045 | 1.00–1.50 | — | 0.45–0.65 |
| A217 WC9 | 0.05–0.18 | 0.40–0.70 | 0.60 max | 0.040 | 0.045 | 2.00–2.75 | — | 0.90–1.20 |
| A105 | 0.35 max | 0.60–1.05 | 0.10–0.35 | 0.035 | 0.040 | 0.30 max | 0.40 max | 0.12 max |
Actual heat analysis is stated on the mill test certificate that accompanies each valve.
Minimum room-temperature values required by the governing specification.
Swipe the table sideways to see all columns.
| Grade | Tensile Strength (MPa, min) | Yield Strength (MPa, min) | Elongation (%, min) | Reduction of Area (%, min) |
|---|---|---|---|---|
| A216 WCB | 485 | 250 | 22 | 35 |
| A352 LCB | 450 | 240 | 24 | 35 |
| A351 CF8 | 485 | 205 | 35 | — |
| A351 CF8M | 485 | 205 | 30 | — |
| A217 WC6 | 485 | 275 | 20 | 35 |
| A217 WC9 | 485 | 275 | 20 | 35 |
| A105 | 485 | 250 | 30 | 30 |
Every valve is shell tested and seat tested to API 598 / BS EN 12266 before painting and dispatch.
Where these valves are put to work.
Nothing leaves the works untested.
Hydrostatic shell test at 1.5 times the rating followed by a seat closure test, both recorded against the valve serial number.
Positive material identification on body, bonnet and trim confirms the alloy supplied matches the alloy specified.
Actuated valves are cycled through full open and full close with limit switch and torque checks before packing.
Material certificates, test reports, GA drawings and spare part lists are despatched with the consignment.
Our engineers will recommend the valve type, body material and trim, and revert with a quotation and delivery schedule.
