Control Valves Β· Cage-Guided Control Valves
Pneumatic Cage Control Valve
The pneumatic cage control valve is the cage-guided, actuated execution of the cage guided control valve line: a WCB, WC6, CF8 or CF8M body and bonnet around a caged trim - lower sleeve, plug and upper sleeve in 304/316 with cobalt-chromium hardfacing alloy facing, balanced by a 1.4310+D31 seal ring and sealed with a 304/316+soft graphite spiral wound gasket and PTFE or soft graphite stuffing. The benchmark execution tables nominal diameters DN40 to DN400 with rated Kv characteristics.
Part of the Cage-Guided Control Valves family
Last updated: 2026-11
Specifications
| size range | DN40 to DN400 (40,50,65,80,100,125,150,200,250,300,350,400) |
|---|---|
| body materials | WCB, WC6, CF8, CF8M |
| body materials | WCB, WC6, CF8, CF8M |
| balanced seal ring materials | 1.4310 + D31 |
| spiral wound gasket materials | 304/316 + soft graphite |
| stuffing materials | PTFE, soft graphite |
| stud materials | Grade 35, 304 |
| nut materials | Grade 45, 304 |
| lower sleeve materials | 304,316/cobalt-chromium hardfacing alloy, 316/cobalt-chromium hardfacing alloy |
| valve plug materials | 304,316/cobalt-chromium hardfacing alloy, 316/cobalt-chromium hardfacing alloy |
| upper sleeve materials | 304,316/cobalt-chromium hardfacing alloy |
| valve rod materials | 304,316, 316 |
| gasket materials | Q235B, 304 |
| packing spring materials | 304,316 |
| packing spacer materials | 304 |
| packing gland materials | 304 |
Application & selection guidance
Select this execution where cage guidance is wanted to stabilise the plug under high pressure drop and to carry noise or cavitation trim options, with pneumatic actuation. Pick the body casting against the medium, choose 304 or 316/cobalt-chromium hardfacing alloy trim against erosion, and match the DN40 to DN400 size band and Kv table to the loop capacity.
Frequently asked questions
What does cage-guided trim do on this valve?
The cage guides the plug across its travel and can carry drilled trim stages, so the plug stays centred under high pressure drop and noise or cavitation duty can be trimmed into the sleeve. The benchmark page lists lower sleeve, plug and upper sleeve in 304/316 with cobalt-chromium hardfacing alloy facing inside a WCB/WC6/CF8/CF8M boundary.
Which sealing components close the benchmark execution?
The benchmark page lists a 1.4310+D31 balanced seal ring, a 304/316+soft graphite metal spiral wound gasket, PTFE or soft graphite stuffing with 304 packing spring, spacer and gland, and grade 35/304 studs with grade 45/304 nuts.
What sizes does the benchmark execution cover?
The benchmark technical table runs nominal diameter DN40 to DN400 with equal percentage and linear rated Kv values per size, so loop capacity can be read directly from the Kv table.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
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