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Armstrong Products Armstrong®
800-876-0036
Phone: 847-356-0566
    Fax: 847-356-0747
E-Mail: sales@mmcontrol.com

Liquid Drainers


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Inverted Bucket  |  Free Floating Guided Lever  |  Fixed Pivot Ball Float  |  Snap-Action Ball Float  |  High Leverage Spring-Loaded Ball Float  |  Free-Floating Lever Dual Gravity  |  Ultra-Capacity

Liquid drainers are also known as:    · Compressed air drains   · Condensate drainers   · Air traps   · Water traps   · Dump valves   · Float traps   · Compressed air traps

Provision for automatic drainage is sometimes not included in the original system. It is possible to discharge liquid manually through a valve that has been cracked open. However, an open drain also continuously wastes air or gas. Periodically opening a valve by hand and leaving it until it blows freely will also drain a system. Frequently, however, an operator will delay or forget to close a valve, thereby wasting precious air or gas.

Liquid drainers installed at appropriate points will remove liquid continuously and automatically without wasting air or gas. In addition to drainage of the system, liquid drainers should provide:

· Trouble-free operation with minimal need for adjustment or maintenance   · Reliable operation even in the presence of dirt, grit and oil   · A long operating life   · Minimal air loss   · Ease of repair

 Inverted Bucket Liquid Drainers

BVSW Series

 

 

Armstrong BVSW Series Liquid Drainers BVSW (bucket vent scrubbing wire) Inverted Bucket Drain Traps

For loads to 6,500 lb/hr (2948 kg/hr) . . . Pressures to 650 psig (45 bar)

Armstrong inverted bucket drain traps are designed for systems where heavy oil and dirt may be encountered. The enlarged bucket vent equipped with a scrub wire (BVSW) allows free flow through the bucket vent and discharge through the orifice in the top of the trap.

 

 

 

 

 
 

 Free-Floating Guided Lever Drain Traps

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1/2/3/6 LD Series

11/22/13 LD Series

 

Armstrong 1/2/3/6 LD Series Drain Traps 1-LD, 2-LD, 3-LD and 6-LD Cast Iron Traps

For loads to 49,000 lb/hr (22226 kg/hr) . . . Pressures to 300 psig (21 bar)

Armstrong's cast iron, free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats of Armstrong inverted bucket steam traps. Elliptical floats and high leverage make it possible to open large orifices to provide adequate capacity for drain trap size and weight.

The hemispherical valve, seat and leverage of the 1-LD, 2-LD, 3-LD and 6-LD cast iron traps are identical in design, materials and workmanship to those for saturated steam service up to 300 psig (21 bar), with the exception of the addition of a guidepost to ensure a positive, leak-tight valve closing under all conditions.

Armstrong 11/22/13 LD Series SS Drain Traps 11-LD, 22-LD and 13-LD Stainless Steel Traps

For loads to 9,500 lb/hr (4309 kg/hr) . . . Pressures to 570 psig (39 bar)

Armstrong's stainless steel, free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats as Armstrong inverted bucket steam traps that have been proven in years of service. Elliptical floats and high leverage make it possible to open large orifices to provide adequate capacity for drain trap size and weight.

The hemispherical valve, seat and leverage of the 11-LD, 22-LD and 13-LD stainless steel traps are identical in design, materials and workmanship to those for saturated steam service up to 570 psig (39 bar), with the exception of the addition of a guidepost to assure a positive, leak-tight valve closing under all conditions.

 
 

180 LD Series

32/33/36-LD Series

 

Armstrong 180 Series Liquid Drainers 180 Series Free-Floating Lever Drain Traps

For pressures to 400 psig (28 bar) . . . Capacities to 2,000 lb/hr (907 kg/hr)

All-stainless steel for horizontal installation.

Armstrong's stainless steel, free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats as Armstrong inverted bucket steam traps.

The hemispherical valve, seat and leverage of the 180-LD and 181-LD stainless steel traps are identical in design, materials and workmanship to those for saturated steam service up to 570 psig (39 bar), except that the 180 Series traps have a guidepost to ensure a positive leak-tight valve closing under all conditions. The 180 Series is designed for situations where mounting a drainer close to the floor is critical. A back vent connection is required.

Armstrong 30 Series Liquid Drainers 32-LD, 33-LD and 36-LD Forged Steel Traps

For loads to 42,000 lb/hr (19050 kg/hr). . . Pressures to 1,000 psig (69 bar)

Armstrong's forged steel free-floating guided lever drain traps use the same bodies, caps, lever mechanisms, valves and seats as Armstrong inverted bucket steam traps that have been proved in years of service. Elliptical floats and high leverage make it possible to open large orifices to provide adequate capacity for drain trap size and weight.

The hemispherical valve, seat and leverage of the 32-LD, 33-LD and 36-LD forged steel traps are identical in design, materials and workmanship to those for saturated steam service up to 1,000 psig (69 bar), with the exception of the addition of a guidepost to ensure a positive leak-tight valve closing under all conditions.

 
 

995LD-DSS Series Free-Floating Guided Lever Drain Traps

 

Armstrong 995LD-DSS Series Liquid Drain Traps 995LD-DSS Duplex Stainless Steel Trap

For loads to 11,000 lb/hr (5 000 kg/hr) . . . Pressures to 290 psi (20 bar)

Armstrong's duplex stainless steel free-floating guided lever drain trap use the same lever mechanisms, valves and seats of Armstrong inverted bucket steam traps.

The hemispherical valve, seat and leverage of the 995LD-DSS duplex stainless steel trap are identical in design, materials and workmanship to those for saturated steam service up to 20 bar with the exception of the addition of a guidepost to assure a positive, leaktight valve closing under all conditions.

Currently available in Europe, the Middle East, and Africa.

 

 

 

 
 

 Fixed Pivot Ball Float Drain Traps

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21 Series

 

 

Armstrong 21 Series Fixed Pivot Ball Float Drain Trap No. 21 & 21-312 Fixed Pivot Ball Float Drain Traps

For loads to 3,900 lb/hr (1769 kg/hr) . . . Pressures to 600 psig (41 bar)

Continuous flow or on-off float drain traps

Armstrong's line of fixed lever drain traps includes two basic models available in cast iron and forged steel. The floats are light enough to handle light liquids.

No. 21 - A small, high-quality, economical drain trap for use on drainage jobs where dirt and oil are not encountered. It employs a single lever with a fixed pivot.

No. 21-312 - Forged steel version of the No. 21, with larger float and higher leverage.

Caution: Ball float drain traps are not recommended where heavy oil, sludge or considerable dirt are encountered in lines. Under these circumstances, use Armstrong inverted bucket BVSW traps.

 

 

 

 

 
 

 Armstrong Snap-Action Ball Float Drain Traps

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71 Series - Snap Action

 

 

Armstrong 71 Series Snap-Action Drain Trap 71 Series Snap-Action Ball Float Drain Traps

For loads to 1,950 lb/hr (885 kg/hr) . . . Pressure to 1,000 psig (69 bar)

Continuous flow or on-off float drain traps

Armstrong's line of snap action drain traps includes two basic models available in cast iron and forged steel. The floats are light enough to handle light liquids.

No. 71-A - Wide-open, tight-shut drain trap for use where fine dirt and grit may be present or where liquid load is light. A flat spring in the leverage system holds the valve closed until the trap body is nearly full of water. Then it snaps open, washing dirt through. When the trap body is nearly empty, the spring snaps the valve shut.

No. 71-315 - Forged steel version of No. 71-A.

Caution: Ball float drain traps are not recommended where heavy oil, sludge or considerable dirt are encountered in lines. Under these circumstances, use Armstrong inverted bucket BVSW traps.

 

 

 

 

 
 

 High Leverage Spring-Loaded Ball Float Drain Traps

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Armstrong HLS Series

 
 

Armstrong HLS Series Spring Loaded Drain Trap HLS Series High-Leverage Spring-Loaded Ball Float Drain Traps

For low flows at pressures to 3,700 psi (255 bar) and specific gravity down to 0.40

The Armstrong high leverage series of liquid drain traps was developed especially for draining low-specific-gravity fluids from gases at high pressures. They use standard Armstrong forged steel bodies with very high leverage systems and spring assist.

Note: Models 2313-HLS, 2316-HLS, 2413-HLS and 2415-HLS are also available with cast T-316 stainless steel body and all-stainless steel internals.

It is essential that a safety factor of at least 2 be applied to the peak liquid load for sizing purposes. Do not use HLS drain traps on steam service.

Sour Gas Service: Forged steel and stainless steel traps can be modified to resist hydrogen sulfide stress corrosion. These modifications involve annealing the float, which will reduce the maximum working pressure of the float to about half its normal value. Consult M&M Control Service for allowable working pressures.

 
 
 

 Free-Floating Lever Dual Gravity Drain Traps

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2/3/6-LD Series

 
 

Armstrong 2/3/6-LD Series Free-Floating Lever Dual Gravity Drain Traps 2/3/6-LD Series Free-Floating Lever Dual Gravity Drain Traps

For pressures to 1,000 psig (69 bar)

Armstrong free-floating lever dual gravity drain traps are identical to Armstrong's 2-LD, 3-LD, 6-LD, 32-LD, 33-LD, and 36-LD, except float weights are modified to make them suitable for draining water from a light liquid. If you wish to use them for draining any liquid with a specific gravity other than 1.00, call M&M Control at 1-800-876-0036 for assistance.

Floats for dual gravity drain traps are weighted with quenching oil, which, in the unlikely possibility of float failure, may be dispersed through the system.

Viscosity considerations for dual gravity traps: The operation of dual gravity traps depends upon a float that will sink in the light liquid and float in the heavy liquid. When the specific gravities of the two liquids are very close, the available operating forces are, therefore, also very small. Viscous fluids may impair the ability of the trap to respond to changing liquid levels.

 

 
 

 Ultra-Capacity Drain Traps

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JD/KD/L/LS/M/MS Series

 
 

Armstrong Model TS-2 Radiator Air Vent JD/KD/L/LS/M/MS Series Ultra-Capacity Drain Traps

Capacities to 700,000 lb/hr (317520 kg/hr) . . . Pressures to 450 psig (31 bar)

Armstrong ultra-capacity ball float drain traps are designed to meet exceptionally large capacity needs in draining water and other liquids from air or other gases under pressure.

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.

 

 

 

 

 

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