Non-Code Blowdown Tanks for Boiler Blowdown Applications
Rema LLC manufactures non-code blow down tanks, also commonly called
non-code blowdown tanks or
blow-off separator tanks, for commercial boiler blowdown
applications where non-ASME equipment is permitted.
These heavy-gauge steel tanks are designed to receive hot boiler blowdown
discharge, help separate flash steam, and cool discharge water before it
reaches the drain. Standard non-code models are available for boilers from
1 HP to 50 HP.
Important: Non-Code / Non-ASME Tank Notice
Rema LLC’s online blowdown tank offering focuses on
non-code, non-ASME blow-off separator tanks. The buyer,
contractor, engineer, installer, or end user is responsible for confirming
that a non-code tank is acceptable for the installation. Requirements may vary
by local code, state boiler regulations, the authority having jurisdiction,
and insurance requirements.
What Is a Blowdown Tank?
A blowdown tank is used in boiler systems to handle discharge from boiler
blowdown. During normal boiler operation, dissolved solids, sediment, sludge,
and other contaminants can build up inside the boiler. Blowdown removes a
portion of that water so the boiler can continue operating with better water
quality and less buildup.
Because boiler blowdown can be hot and under pressure, the discharge should
not be sent directly to a drain without proper handling. A blowdown tank or
blow-off separator tank receives the discharge, provides space for flash steam
to separate and vent, and helps cool the water before it leaves the tank.
Customers may search for this equipment as a blow down tank,
blowdown tank, boiler blowdown tank,
boiler blow down tank, or
blow-off separator tank. In many boiler room projects, these
terms are used to describe similar blowdown handling equipment.
How Boiler Blowdown Works
Blowdown is used to remove concentrated boiler water from the system. This
helps control dissolved solids, reduce sludge accumulation, and protect
downstream boiler room equipment.
Surface Blowdown
Surface blowdown removes water near the surface of the boiler water level.
This helps control dissolved solids and water chemistry during boiler operation.
Bottom Blowdown
Bottom blowdown removes sludge, sediment, and heavier contaminants that
settle near the bottom of the boiler. This process helps keep the boiler
cleaner and supports more reliable system operation.
Why Use a Non-Code Blowdown Tank?
A non-code blowdown tank may be used where a non-ASME tank is permitted by
the project requirements and local regulations. These tanks provide a compact,
simple, and durable way to manage boiler blowdown discharge in many commercial
boiler room applications.
Heavy Steel Construction
Rema non-code blow down tanks use heavy-gauge steel construction for
durability in boiler room service.
Compact Footprint
The vertical tank design provides a compact footprint for mechanical rooms
where floor space is limited.
Simple Separator Design
The tank receives blowdown discharge, allows flash steam to vent, and
directs cooled discharge water toward the drain connection.
Rema Non-Code Blow-Off Separator Tank Models
Rema non-code blow-off separator tanks are available in three standard models
for boilers from 1 HP to 50 HP. Select the model based on the
boiler horsepower range and confirm that a non-code tank is acceptable for the
installation before ordering.
1 to 15 HP Boilers
Compact non-code blow-off separator tank for smaller boiler blowdown applications.
15 to 30 HP Boilers
Mid-size non-code blowdown tank for commercial boiler room blowdown handling.
30 to 50 HP Boilers
Larger non-code blow-off separator tank for higher-capacity boiler installations.
| Description | BD-10 | BD-16 | BD-18 |
|---|---|---|---|
| Overall Height | 32" | 32" | 32" |
| Diameter | 10" | 16" | 18" |
| Tank Height | 20" | 20" | 20" |
| Vent | 2-1/2" | 2-1/2" | 2-1/2" |
| Water Inlet | 1/2" | 1/2" | 1/2" |
| Drain Outlet | 2-1/2" | 2-1/2" | 3" |
| Blow-Off Inlet | 1" | 1-1/4" | 1-1/2" |
| Thermometer | 1/2" | 1/2" | 1/2" |
| Hand Hole | 4" optional | 4" optional | 4" optional |
| Inlet Height | 15-1/4" | 15-1/4" | 15-1/4" |
| Boiler HP Range | 1 to 15 HP | 15 to 30 HP | 30 to 50 HP |
| Max Boiler Pressure | 200 PSI | 200 PSI | 200 PSI |
| Weight | 105 lbs. | 130 lbs. | 200 lbs. |
| Capacity | 6-3/4 gallons | 17-1/3 gallons | 21 gallons |
* Dimensions are listed in inches. Model selection should be confirmed
against the boiler application and applicable project requirements.
Common Applications
Commercial Boiler Rooms
Used in boiler rooms where hot blowdown discharge needs to be received,
separated, and cooled before reaching the drain.
Steam Boiler Systems
Supports steam boiler maintenance by helping manage sludge, sediment,
and concentrated boiler water removed during blowdown.
Boiler Room Upgrades
Commonly installed alongside
condensate return systems
,
boiler feed equipment, pumps, and replacement tanks.
Blowdown Tank Benefits
A properly selected boiler blowdown tank helps support safer discharge
handling, cleaner boiler operation, and better long-term system reliability.
- Helps receive hot boiler blowdown discharge
- Allows flash steam to separate and vent
- Helps cool discharge water before it reaches the drain
- Supports proper boiler room blowdown handling
- Helps reduce sludge and sediment buildup in the boiler
- Supports boiler efficiency and maintenance practices
- Compact design for mechanical room installations
- Available in three standard non-code sizes
Non-Code vs. ASME-Code Requirements
Rema LLC’s standard online blowdown tank models are
non-code, non-ASME blow-off separator tanks. They are intended
for projects where a non-code tank is permitted.
Some states, municipalities, facilities, insurance carriers, engineers, or
authorities having jurisdiction may require ASME-stamped or code-rated
equipment for boiler blowdown applications. Before ordering, confirm the
applicable requirements for your installation.
If you are unsure whether a non-code blowdown tank is acceptable, contact the
project engineer, local boiler inspector, authority having jurisdiction, or
insurance representative before purchasing.
Need Help Choosing a Blowdown Tank?
If you are replacing an existing blowdown tank or selecting a non-code
blow-off separator tank for a boiler room project, Rema can help review the
model size, boiler horsepower range, and related boiler room equipment.
Frequently Asked Questions
What is a blowdown tank used for?
A blowdown tank is used to receive hot boiler blowdown discharge, allow flash
steam to separate and vent, and help cool the discharge water before it reaches
the drain.
Is a Rema blowdown tank ASME coded?
The standard online Rema blowdown tank models are non-code, non-ASME blow-off
separator tanks. The buyer must confirm that a non-code tank is acceptable for
the installation.
What size non-code blowdown tanks does Rema offer?
Rema offers three standard non-code models: BD-10 for 1 to 15 HP boilers,
BD-16 for 15 to 30 HP boilers, and BD-18 for 30 to 50 HP boilers.
Can a non-code blowdown tank be used in every state?
Not necessarily. Requirements vary by local code, state boiler regulations,
insurance requirements, and the authority having jurisdiction. Confirm
requirements before ordering.
Are blowdown tanks used with condensate return systems?
Yes. Blowdown tanks and condensate return systems are often part of the same
boiler room upgrade or replacement project, but they perform different functions.