Globe straight-way LTG3 series is a very versatile control valve for the main applications. Its high performance derives by using a balanced and cage-guided plug. LTG3 is particularly suitable for heavy duties and for any other application under most demanding service conditions. Due to their imple construction, to the large range of trim types and available materials, these valves are suitable for a wide range of applications, including also high temperature and corrosive fluids, severe low-noise requirements and sour service in accordance with NACE standard.

Main Advantages

• High pressure drop capability with no practical limitations
• Improved plug stability due to large guiding areas
• Wide-range capability is llowed by a great number of reduced capacity trims
• Excellent noise attenuation - with low noise single stage trim for gas and steam service
• Improved cavitation protection on liquid services
• Multistage trims also available for cavitation control
• Balanced plug contruction reduces thrust and actuator sizes
• Piloted plug contruction for tight shut-off up to class V in high temperature services

Technical Characteristics

Body

• Sizes: 2", 3", 4", 6", 8", 10", 12", 14", 16", 18", 20"
• Ratings: upto ANSI 150, 300, 600, 900, 1500, 2500 and equivalent PN
• Flanged, butt-welded, socket-welded and threaded
• Cst standard construction; wrought or bar for 2" and 3" sizes
• Face-to-face dimensions as per IEC 60534-3-2 - long series
• Materials: Carbon, Cr-Mo, and AISI 316 stainless steel
• Flow direction: to open - general failure / to close - for piloted plugs and some flashing services

Bonnet

• Standard or extended type either for high or low teperature applications
• Bolted to body
• Same materials as body

Trim

• Balanced and fully cage-guided plug
• Unbalanced design for small ports or low pressure drop applications
• Piloted design for tight shut-off associated to high fluid temperature
• Plug seal rings: PTFE, metal or metal and graphite

Cage

• Low-noise drilled cage single LN and special ELN type with additional acoustical benefit of 4dB
• MPS multistage trim special design for high pressure drops
• Multi-cage contruction up to 6 stages. 7 stages and over are obtained from a solid disk stack
• Linear and equal % characteristics for standard trim design

Seat Ring

• Quick-change and free-expanding type, precisely coupled to the cage to ensure a perfect plug alignment

Leakage Class

• Classes III, IV, IV S1 and V according to IEC 60534-4
• Class VI is also available with soft seat

Actuators

• Pneumatic diaphragm or Piston type
• Electric and Electro-Hydraulic actuators