L M Series Float Thermostatic Steam Traps

L M Series Float Thermostatic Steam Traps
L & M Series Ultra-Capacity Float & Thermostatic Steam Trap
Cast Iron for Horizontal Installation, With Thermostatic Air Vent
Steam Trapping and
Steam Tracing Equipment
For Pressures to 250 psig (17 bar)...Capacities to 208,000 lb/hr (94,348 kg/hr)
H
H
S
Optional Integral
Vacuum Breaker
T
B M
D
T
The simple yet rugged cast iron construction of the L & M Series Ultra-Capacity
F&T steam traps offers long, trouble-free service. All floats, valves and seats,
and lever mechanisms are constructed of stainless steel.
The integral thermostatic air vent is a balanced-pressure phosphor bronze
bellows caged in stainless steel. It is designed especially for heavy-duty
industrial applications where highly efficient, uninterrupted service is essential.
This balanced pressure type air vent will respond to the pressure-temperature
curve of steam at any pressure from zero to 250 psig (17 bar). Thus—up to
250 psig (17 bar)—air is vented at slightly below steam temperature.
Maximum Operating Conditions
Maximum allowable pressure (vessel design):
Model L: 250 psig @ 450°F (17 bar @ 232°C)
Model M: 250 psig @ 450°F (17 bar @ 232°C)
30 psig (2 bar) saturated steam
100 psig (7 bar) saturated steam
150 psig (10 bar) saturated steam
250 psig (17 bar) saturated steam
250 psig (17 bar) saturated steam
bellows: 422°F (217°C)
Connections
Body and cap:
Internals: Valve(s) and seat(s):
Drain plug:
Thermostatic air vent:
ASTM A48 Class 30
All stainless steel—304
Stainless steel
Carbon steel
Stainless steel and bronze with phosphor
bronze bellows, caged in stainless steel
Options
• Integral vacuum breaker 150 psig (10 bar) maximum. Add suffix VB
to model number
• No internal thermostatic air vent for liquid drainer service. Add suffix
LD to model number
• Integral flash release for syphon drainage service. Add suffix CC to
model number
• Armored gauge glass 250 psig @ 424°F (17 bar @ 218°C)
128
1/2" NPT
Series M, LD shown
How to Order
Pressure
Model
Connection
Size
Option
250
M
12
GG
30
100
150
250
250
L
8=2"
10=2-1/2"
M
12=3"
VB = Vacuum Breaker
LD = Liquid Drainer
CC = Condensate Controller
G/G = Gauge Glass
FLG = Specify type and
class of flange
Special Configurations
Condensate controller with flash release for syphon drainage and/or
cascade service. The condensate controller (CC) configuration was developed
especially to meet very large capacity needs in applications where condensate
must be lifted from the drain point to the trap. Under such conditions—often
referred to as syphon drainage—the reduction in pressure that occurs when
condensate is elevated causes a portion of the condensate to flash into
steam. Ordinary traps, unable to differentiate between flash steam and live
steam, close and impede drainage.
The L & M Series condensate controllers (CC) are equipped with a fixed,
restricted orifice near the top of the body to bleed off the flash steam (and
all air present). This permits the trap to function properly on condensate.
Screwed NPT and BSPT
Flanged (screw on)
Materials
T
D
Series M, CC shown
Description
S
B M
1/2" NPT
Series L, F&T shown
Maximum operating pressure:
Model 30-L: Model 100-L: Model 150-L: Model 250-L: Model 250-M: Maximum operating temperature
H
1-1/2" NPT
B M
D
1/2" NPT
S
Liquid drainer with back vent for exceptionally high capacity drainage
of liquid from gas under pressure. The liquid drainer (LD) configuration
was developed to meet very large capacity needs in draining water and
other liquids from air or other gases under pressure. To prevent air or
gas binding, the access port in the top of the body serves as a back vent
connection to the equipment being drained. For capacity data, see pages 501
and 520 or consult your Armstrong Representative.
L and M Series Traps
Trap Series
Pipe Connection
L
M
L
in
2, 2-1/2
M
mm
3
50, 65
“B” (Height)
20-1/4
514
“C” (Width)
14-3/4
375
• L and M Series available with floor mounting bracket. Consult factory.
“D”(Bottom to CL)
4-3/16
106
“H” (Length)
19-3/4
502
Specification
“M” (CL to CL)
11-5/16
287
Float & thermostatic steam trap, type ... in cast iron, with thermostatic air vent.
“S” (Gauge Glass Width)
3-3/4
95.2
For a fully detailed certified drawing, refer to CD #1010.
“T” (Gauge Glass Height)
12
Weight lb (kg)
80
305
196 (88.9)
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
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L & M Series Ultra-Capacity Float & Thermostatic Steam Trap
Cast Iron for Horizontal Installation, With Thermostatic Air Vent
For Pressures to 250 psig (17 bar)...Capacities to 208,000 lb/hr (94,348 kg/hr)
Model M Series Capacity
Steam Trapping and
Steam Tracing Equipment
Model L Series Capacity
Installation Notes
Under conditions where the load may approach the maximum capacity of
the trap, it is recommended that the size of the discharge line be increased
one size as close to the trap cap as is practical. When L and M Series units
are used in severe service conditions or at pressures exceeding 30 psig,
use an anchoring bracket or other supportive measures to minimize stress
on piping.
Ultra-Capacity L and M Series units MUST BE WARMED UP in the proper
sequence and gradually. Recommended warm-up rate—not to exceed
100°F/8 minutes.
See your Armstrong Representative.
Vacuum Breaker—1/2'' (15 mm) NPT
Many times, condensate will be retained ahead of steam traps because of
the presence of a vacuum. To break a vacuum, air must be introduced into
the system by means of a vacuum breaker.
For maximum protection against freezing and water hammer in heating coils
under modulated control, for example, vacuum breakers are recommended
in conjunction with freeze protection devices.
Vacuum Breaker
in
mm
1/2 NPT
15
3/8 NPT
10
“C” Height
1-1/4
32
“D” Width
7/8 Hex
22 Hex
Size
“B” Pipe Connections
Max. allow. pres.
150 psig
(10 bar)
D
B
C
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
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