Bolted Bonnet :
L&T Valves manufactures a wide variety of Gate, Globe &
Check Valves in bolted-bonnet design.
The valves are approved by the global majors in oil & gas
and power and have a reputation for reliable performance in
critical services, across the globe.
Valves in bolted bonnet construction are available in pressure
classes from 150 to 2500, in a variety of materials and end-connections.
Gate Valves
» API 600/ISO 10434
» 2" to 72"
» ASME class 150 to 2500
Salient Features:
» Body and bonnet - Cast
with uniform sections, precision machined
» Body: Straight through port without recesses
except in the seat area - Minimum resistance to flow, turbulence
and erosion
» Flex wedge: Guide slots in the wedge engage with
integral guide ribs in the body, Stem-to-wedge contact close
to wedge centre - Better sealing, smoother operation
» Seal-welded seat ring - Eliminates leakage path
between seat ring and body, does not loosen up due to temperature
fluctuations or vibration
» Stem - One-piece construction with forged T-head
- Long service life, smoother operation
Globe Valves
» BS 1873
» 2" to 24"
» ASME 150 to 2500
Salient Features:
» Body and Bonnet - Cast
with uniform sections, precision machined.
» In-situ hard-faced body seat - Eliminates leakage
path between seat ring and body.
» Guided plug-type disc, Free-floating stem-disc
connection - Uniform seating.
Check Valves
» BS 1868
» 2" to 36"
» ASME 150 to 2500
Salient Features:
» Body and Bonnet - Cast
with uniform sections, precision machined.
» Body: Permits full swing of disc on downstream
side - Lower flow resistance and disc erosion.
» Disc: Internally-hinged - No opening on the body,
higher integrity
» Disc secured to hinge using lock nut and pin.
» Disc free to rotate to avoid localized wear
Pressure-seal :
L&T Valves manufactures a wide variety of Gate, Globe &
Check Valves in pressure-seal design.
The valves are approved by the global majors in power and
oil & gas and have a reputation for reliable performance
in critical services, across the globe.
Pressure seal range is available in ASME classes from 600
to 4100. The valves conform to ANSI B16.34 and are offered
with fully hard-faced seats in carbon steel, stainless steel
and alloy steel.
Gate Valves
» ANSI B16.34
» 2" to 36"
» ASME class 600 to 4100
Salient Features:
» Pressure seal body-bonnet
joint - Line pressure is used to create a tight body-bonnet
seal. Higher the pressure, tighter the seal
» Parallel-slide gate with
disc-springs - Better sealing, lower operating torque, minimises
possibility of disc jamming
» Fully hard-faced trim
- Disc, seat-rings and back-seat hard-faced for longer service
life
» Welded seat ring - Eliminates
leakage path between seat ring and body, does not loosen up
due to temperature fluctuations or vibration
» Valves available in intermediate
pressure classes (#3100, 3500 & 4100) to meet specific
customer requirements
» Option - Valves are offered
with pillar yoke arrangement that provides easy access to
gland packing
Golbal Valves
» ANSI B16.34
» 2" to 18"
» ASME class 600 to 4100
Salient Features:
» Y-type Configuration
- Straight flow and lower pressure drop compared to conventional
globe valves
» Pressure seal body-bonnet
joint - Line pressure is used to create a tight body-bonnet
seal. Higher the pressure, tighter the seal
» Integral body seat
» Fully hard-faced trim
- Disc, seat and back-seat hard-faced for longer service life
» Guided disc
» Impactor handwheels for
tighter sealing
» Valves available in intermediate
pressure classes (#3100, 3500 & 4100) to meet specific
customer requirements
» Option - Valves are offered
with pillar yoke arrangement that provides easy access to
gland packing
Check Valves
» ANSI B16.34
» 2" to 28"
» ASME class 600 to 4100
Salient Features:
» Pressure seal body-cover
joint - Line pressure is used to create a tight body-bonnet
seal. Higher the pressure, tighter the seal
» Fully hard-faced trim
- Disc and seat-rings hard-faced for longer service life
» Welded seat ring - Eliminates
leakage path between seat ring and body, does not loosen up
due to temperature fluctuations or vibration
» Swing-type disc
» Disc: Internally-hinged
- No opening on the body, higher integrity
» Valves available in intermediate
pressure classes (#3100, 3500 & 4100) to meet specific
customer requirements
Cryogenic :
L&T Valves offers Gate, Globe & Check Valves for cryogenic
services suitable for temperatures as low as -196 degree C (-321
degree F).
The valves are approved by the world-leaders in oil &
gas and have a reputation for reliable performance in critical
services, across the globe.
These valves are manufactured by L&T and its wholly-owned
subsidiary, L&T Valves Limited (Formerly Audco India Limited).
The state-of-the-art manufacturing infrastructure includes
one of the largest in-house cryogenic test facilities in the
world, capable of testing valves of sizes up to 60”.
Gate Valves
» API 600/ ISO 10434/ BS
6364
» 2" to 54"
» ASME class 150 to 2500
Salient Features:
» Extended bonnet with vapour
column length as per BS 6364/ customer requirement - Packing
protected from cryogenic temperatures, efficiency not compromised
» Fully hard-faced trim -
Disc, seat-rings and back-seat hard-faced for longer service
life
» Body and bonnet - Cast
with uniform sections, precision machined
» Body: Straight through
port without recesses except in the seat area - Minimum resistance
to flow, turbulence and erosion
» Flex wedge: Guide slots
in the wedge engage with integral guide ribs in the body, Stem-to-wedge
contact close to wedge centre - Better sealing, smoother operation
» Seal-welded seat ring -
Eliminates leakage path between seat ring and body, does not
loosen up due to temperature fluctuations or vibration
» Stem - One-piece construction
with forged T-head - Long service life, smoother operation
Golbal Valves
» BS 1873/ BS 6364
» 2" to 12"
» ASME class 150 to 2500
Salient Features:
» Extended bonnet with vapour
column length as per BS 6364/ customer requirement - Packing
protected from cryogenic temperatures, efficiency not compromised
» Fully hard-faced trim -
Disc, seat-rings and back-seat hard-faced for longer service
life
» Body and Bonnet - Cast
with uniform sections, precision machined
» In-situ hard-faced body
seat - Eliminates leakage path between seat ring and body
» Guided plug-type disc,
Free-floating stem-disc connection - Uniform seating
Check Valves
» BS 1868/ BS 6364
» 2" to 36"
» ASME class 150 to 2500
Salient Features:
» Fully hard-faced trim -
Disc and seat-rings hard-faced for longer service life
» Body and bonnet - Cast
with uniform sections, precision machined
» Body: Permits full swing
of disc on downstream side - Lower flow resistance and disc
erosion
» Disc: Internally-hinged
- No opening on the body, higher integrity
» Disc secured to hinge using
lock nut and pin
» Disc free to rotate to
avoid localized wear
Forged Steel :
L&T Valves manufactures a variety of Gate, Globe & Check
Valves in forged construction to suit a spectrum of applications.
Gate Valves
Valves for Power :
These valves are manufactured by L&T and its wholly-owned
subsidiary, L&T Valves Limited (Formerly Audco India Limited)
which focuses on the requirements of the power sector. The facility
is the only Indian valve plant authorised to offer valves with
ASME ‘N’ and ‘NPT’ stamps.
L&T forged steel valves conform to ASME B16.34 and the
range comprises Pressure-seal Gate, Globe & Check Valves
in ASME classes up to 4500.
Small-bore Forged Steel Valves:
These valves are available in ½” to 2”
in straight pattern and Y-pattern.
The straight pattern Gate, Globe & Check Valves are available
in ASME classes up to 800 and the Y-pattern range in classes
1500 and 2500.
Bellow-sealed and Cryogenic gate and globe valves are also
offered.
