Vanessa / Emerson Series 30,000 Triple Offset Valves

Emerson Vanessa Series 30,000 triple offset process valves from −254°C cryogenic to 815°C high-temperature, DN 80–3450, Class 150–1500.

Series 30,000 Basic TOV

Vanessa Series 30,000 basic triple offset valves span DN 80 to 3450 (NPS 3 to 138), ASME Class 150 to 1500 and EN PN 10 to 250, across −60 to 450°C with bidirectional Rate A zero leakage. Torque seating removes 90° rubbing. Seats use Stellite Gr.21 with ring 3a.

DN 80–3450
−60 to +450°C
Class 150–1500
Stellite Gr.21

Cryogenic & Top-Entry TOV

Cryogenic Series 30,000 handles −254°C to +250°C with a BS 6364 bolted extended bonnet and forged Nitronic 50 seal ring, rated Class 150–900 in DN 80–1800. Top-entry bodies give trim access inline. Ring 3a, gasket 3b, and packing 5a stay serviceable.

−254 to +250°C
BS 6364 Bonnet
Nitronic 50
Buttweld Top Entry

Oxygen Service GOX / LOX

Vanessa Series 30,000 oxygen valves isolate gaseous and liquid oxygen in air separation units with non-rubbing metal seating. Contact-free rotation cuts ignition risk, and clean kits follow VCIOM-16224. Seal ring 3a and gland packing ship oil-free.

GOX / LOX Duty
ASU Plants
VCIOM-16224
Oxygen-Cleaned

High-Temp & Molten Salt to 815°C

High-temperature Series 30,000 operates up to 815°C (1500°F), compensating thermal expansion and creep above 600°C. The molten-salt buttweld valve retains heat three times better at 600°C than globe valves. Extended bonnets guard packing 5a.

Up to 815°C
Creep >600°C
3× Heat Retention
Molten Salt

ESD / SIL 3 & High-Cycle Switching

Emergency shutdown and ROSOV builds of Vanessa Series 30,000 meet IEC 61508 SIL 3 and API 607 fire-safe rules using metal trim. Heavy-duty bearings endure high-frequency molecular-sieve switching. Replaceable parts cover ring 3a, keys 4f, and bearings 8.

SIL 3 IEC 61508
API 607 Fire Safe
Molecular Sieve
ΔP Fail-Safe

Basic Seal Kits & Trim Parts

Basic Seal Kits supply self-centering seal ring 3a (Duplex-graphite or solid Nitronic 50 / 17-4 PH), disc spiral gasket 3b, bottom gasket 6c, and graphite packing 5a. Alignment slots mate with disc pins per VCIOM-00006. Kits match the nameplate serial.

Seal Ring 3a
SWG 3b & 6c
Packing 5a
VCIOM-00006

Bearings, Belleville Springs & Flushing Trim

Shaft and gland kits cover Belleville live-load springs 5n, two-piece gland followers, and lantern ring 5h for steam or nitrogen flushing at p + 5%. Shaft support uses AISI 316 bearings 8, thrust bearing 7, graphite protectors, and keys 4f.

Belleville 5n
Lantern Ring 5h
Bearings 7 & 8
Shaft Keys 4f

Weight Savings & Inline Maintainability vs Trunnion Ball Valves

Triple offset geometry removes rubbing during the 90° stroke, cuts valve weight up to 80% versus trunnion-mounted ball valves, and allows buttweld top-entry trim access without cutting the body from the pipeline.

Shorter face-to-face laying lengths (up to two-thirds shorter) shrink offshore module and cryogenic skid footprints.

Unlike twin-seat PTFE ball valves, the single-plane cone-to-cone metal seal tolerates pipe stress without torque spikes or trapped particulate buildup inside body cavities. Bi-directional Rate A zero-leakage shutoff holds across ISO 5208, EN 12266-1, and API 598 test requirements.

Configuration Envelope: Cryogenic, GOX/LOX & High-Temperature

Basic Series 30,000 valves cover DN 80–3450 (NPS 3–138), Class 150–1500 / PN 10–250, and −60 to 450°C in double-flanged, lug, wafer, and buttweld bodies using ASTM A216 WCC, A352 LCC, A351 CF8M/CF3M, duplex, and nickel alloys.

Cryogenic configurations handle −254°C with BS 6364 extended bonnets and forged Nitronic 50 rings.

Specialized builds extend up to 815°C for high-temperature steam and thermal fluid loops, include molten-salt buttweld valves retaining three times more heat at 600°C than globe valves, and provide oil-free oxygen assemblies (VCIOM-16224) plus IEC 61508 SIL 3 emergency shutoff.

Selection Parameters, ΔP Orientation & VCIOM-00006 Service

When specifying Vanessa Series 30,000 valves or replacement Basic Seal Kits, engineers match the exact nameplate serial number and model code alongside fluid name, design ΔP (Trims A through E up to 160 bar), temperature extremes, flange standard, and preferred shaft-side ΔP orientation.

Periodic maintenance follows VCIOM-00006 torque tables for two-piece gland packing and Belleville live-loading spring stacks (5n), while optional p + 5% steam or nitrogen flushing via lantern ring 5h protects shaft bearings from process scale.

Vanessa / Emerson and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Vanessa / Emerson and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.