Vendors

Gas turbines

ABB Stahl
GE Power Systems - Nuovo Pignone
Fiat Avio
Siemens
Solar Turbines

Steam Turbines

Fuji
General Electric
GE Power Systems - Nuovo Pignone
Huangzho (Siemens)
IMitsubishi
MAN GHH Gutehoffnunsgshuette
MO Delaval
Siemens
Solar
Sulzer

Steam Boilers

Babcock
Deutsche Babcock - Borsig
FBM Hudson
GEC Alstom
Macchi
Belleli Saudi Heavy Industries

Heating Furnaces

Heurtey Petrochem
John Zink
Sirz

Flares

Airoil Flaregas
Itas
John Zink
National Airoil Burner
KTI

Columns, vessels and tanks

ATB Caldareria
Belleli Saudi Heavy Industries
FBM Hudson
Officine Resta
VRV
Zanon
Bosco
Siticem
Rolle

Trays for columns

Baretti
Glitsch
Koch International
Norton Chemical Process Products
Sulzer
UOP

Tube bundle heat exchangers

FBM Hudson
GE Nuovo Pignone
COAST
SICES
Resta

Spiral wound heat exchangers

Linde AG
Piston reciprocating pumps
Peroni F. & C.
Uraca Pumpenfabrik
Worthington
Dresser Rand
Wilson Snyder
Union Pump
Reinstahl
Nikkiso

Centrifugal pumps

Goulds pumps
KSB Italia
Pompe Gabbioneta
Worthington
Sihi Idromeccanica (discontinued)
Robuschi
Ebara Corp.
GE Power Systems - Nuovo Pignone
Shin Nippon
Termomeccanica
Dalian Corrosion Resistant Pump Works
Shenyang Pumps Manufactory
BW/IP International (Byron Jackson)

Filter Press

Defenbach
Diemme
Hoesch
Velo
Passavant
Sernagiotto

Process and Environmental Chromatographs

Yokogawa
Honeywell
Rosemount
ABB Kent Taylor
Fisons Instruments
Hartmann & Braun

Distributed Control Systems

Elsag Bailey
Rosemount
Honeywell
Yokogawa

Pneumatic Driven Valves

Fisher Controls
Masoneilan
Neles
Keystone
GE Power Systems - Nuovo Pignone
ABB Kent Taylor
Rockwell

Safety Valves

AST
Crosby Valve & Gauge
GE Nuovo Pignone
Parcol
TAI

Electric Motors

ABB
ABB Motori
ABB Industria
Ansaldo Industria
Loher
Siemens
Marelli Motori
CEMP

Switchgears

ABB Sace
Nuova Magrini Galileo
Siemens
Alfaquadri
Brulli
IMES
Martelli
TG Tardito

Reciprocating Compressors

Neumann & Esser
SIAD Macchine e Impianti
Thomassen International
JSW
GE Power Systems - Nuovo Pignone
Dresser Rand
Mannesmann Demag
Thomé Crepelle
Corblin

Reactors

ATB Caldareria
Belleli
Bosco
NCMW
FBM Hudson
GE Power Systems - Nuovo Pignone
Officine Luigi Resta
VRV
Mangiarotti

Root Blowers

Robuschi
Sihi Idromeccanica (discontinued)
Aerzener
Hibon
Pedrofil

Conveyors

Nova
ONT
Sicai
Favini
Roncuzzi
SAET
Schenk
Pfister

Refractories

Savoie
Norton Group
Dresser Industries
Mariani e Battista
Nova Fima
Eurorefrattari

Emergency Diesel Power Generators

Fincantieri
CGT (Compagnia Generale Trattori)
CTM (Compagnia Tecnica Motori)
Tecnoenergia
Mattei

Laser / Resistance welding Equipment

Unitek Miyachi