Ramsey TRX Series Rotary Point Level Controls

Ramsey TRX Series Rotary Point Level Controls
rotary point level controls can eliminate
spills, material waste and downtime
by preventing bin overflows, plugged
chutes and empty bins. They work
equally well as high or low-level
indicators in plastic, food, chemical,
raw ore, aggregate and many other solid
material applications. This gives you
Thermo Scientific
Ramsey TRX Series
the flexibility and control you need
Product Specifications
Thermo Scientific Ramsey TRX Series
to maximize the performance of your
process and improve your bottom line.
Rotary Point Level Controls
Features & Benefits
• Simple, rugged construction using
fewer parts for more reliable operation
• Easy to install with a screw on cover,
dual conduit entrances, and removable
wiring terminals
• De-energizing motor for extended motor life
• Four shaft bearings for greater shaft
support and dependability
• Dust-tight, die-cast aluminum housing
with powder coat finish
• Approved for Class I Group C & D;
Class II Group E, F, & G hazardous areas
Thermo Scientific Ramsey TRX rotary level
controls are designed for point level
monitoring of solids in bins, vessels and
chutes. They can eliminate spills, material
waste, and downtime by preventing bin
overflows, and by detecting plugged chutes
and empty bins. These controls work equally
well with plastics, food, chemicals, raw
ores, aggregate, and other solid materials.
The Ramsey TRX design eliminates the
most common causes of rotary control
failure and is extremely easy to use.
The control’s de-energizing motor will shut
off when material is present, rather than
entering a stalled condition. This reduces
wear and operating temperature, thereby
extending motor life. Four drive shaft
bearings and a sealed, lubricated gear
assembly make these the most reliable
rotary level controls on the market.
The controls can be installed vertically
on the top of a bin or chute, or horizontally
on the side. Simple installation is achieved
using the optional top or side mounting plates.
As an alternative, they can be mounted
using a standard 11⁄4-in pipe coupling.
Options
• Multiple input voltages
• Rigid couplers or Flexible couplers
• Many paddles for different materials
and applications
• Mounting plates with half or full couplings
in mild steel or stainless steel
• Shaft Extensions: Galvanized
or Stainless Steel
• Pipe Guards: Galvanized
or Stainless Steel
Thermo Scientific Ramsey TRX Series Rotary Point Level Controls
Power Pacs
The power pac is the heart of a rotary point level control. The housing
contains the drive motor, relay switches, wiring connections, and
output shaft. Standard TRX power pacs are available in 120 VAC,
240 VAC, and 24 VDC models. Also available are TRX-PLUS units
with enhanced fail safe capabilities.
Typical side mount installation
Half Pipe Coupling
Power Pac
Couplers
Couplers connect a rotary power pac to a paddle or an extension.
There are two versions available. A rigid coupler can be used in side
mount applications or top mount applications without an extension.
A flexible coupler is used for top mount applications where a shaft
extension will be used.
Paddles
Paddles provide the surface area to push against so the bulk material
can stop the power pac’s rotation. The lighter the material, the more
surface area is needed. An assembled rotary level control with a
single blade “insertable” paddle can be inserted through a pipe
coupling from the outside of a bin without needing interior access.
Triple blade paddles provide greater surface are but require access
inside the bin to connect the paddle or a larger entrance hole in
combination with a mounting plate.
Shaft Extensions (Optional)
Shaft extensions can be used in top mount installations when
the rotary paddle needs to be at a lower level. The shaft extension
is a length of 1⁄4-in pipe that is threaded on both ends. The top of the
extension is screwed into the flexible coupling and at the bottom
of the extension a standard 1⁄4-in pipe coupling is used to attach the
paddle. The maximum length for a shaft extension is 3.66 m (144 in).
Shaft extensions are available in stainless steel or galvanized steel
and come with a matching 1⁄4-in coupling.
Pipe Guards (Optional)
A pipe guard protects a long vertical shaft extension from side
load damage and should be used with all extensions longer than
610 mm (24 in). The pipe guard is a simple length of 11⁄4-in pipe
with one end threaded to screw into the bottom of a standard
11⁄4-in pipe coupling attached to the top of the vessel and shared
by the TRX power pac. The pipe guard should be the same length
as the shaft extension to allow attachment of the paddle at the
bottom and should be adequately braced on long extensions.
Mounting Plates (Optional)
Mounting plates assist with installing a completely assembled unit
from the outside of a curved or flat surface. The rotary level control
connects to a 11⁄4-in pipe coupling on the mounting plate. The model
TMP mounting plate is used in top mount installations and has a full
pipe coupling so that a pipe guard can be attached to the bottom of
the mounting plate. The model SMP mounting plate has a half pipe
coupling for side mount applications and top mount applications
that do not need a pipe guard. A hole is cut into the vessel large
enough for a triple bladed paddle to fit through. The mounting plate
fits over the clearance hole and attaches to the vessel with six bolt
holes. All mounting plates are available in stainless steel or powder
coated mild steel.
Rigid Coupler
Paddle
Typical top mount installation
Power Pac
Full Pipe Coupling
1¼-in Pipe Guard
Flex Coupler
¼-in Extension Pipe
Paddle
¼-in Pipe Coupling
Coupler Options
FC Coupler
• Flexible coupler for
top mount applications
• Stainless steel with SST flex
cable connection
FS Coupler
• Semi-rigid coupler for top or side
mount applications
• Stainless steel with internal spring
shaft and neoprene cover
RP-28 Paddle
• For very light materials,
2 lb/ft3 to 20 lb/ft3
• Three (3) blades
• Stainless steel
RP-1 Paddle
• For light materials,
15 lb/ft3 to 30 lb/ft3
• Three (3) blades
• Stainless steel
• RP-26 is direct connect version
with integral RC coupler
RP-2 Paddle
• For medium materials,
30 lb/ft3 to 70 lb/ft3
• Three (3) blades
• Stainless steel
• RP-30 is direct connect version
with integral RC coupler
Commom Paddle Options
RC Coupler
• Rigid coupler for
side mount applications
• Stainless steel
Contact Thermo Fisher Scientific
for information about other
available paddle options.
RP-3 Paddle
• For heavy materials, over 50 lb/ft3
• Single blade, insertable
• Stainless steel
RP-23 Paddle
• For medium materials,
30 lb/ft3 to 70 lb/ft3
• Single blade, insertable
• Stainless steel
• RP-27 is direct connect version
with integrated RC coupler
Specifications
Thermo Scientific Ramsey TRX Series Rotary Point Level Controls
General Specifications
Input Power
TRX-120
120 VAC 50/60 Hz +10%/-15%
TRX-240
240 VAC 50/60 Hz
TRX-24DC
24 VDC
Output Relay
(1) DPDT—10 Amp @ 250 VAC; Switch selectable High/Low fail safe modes
Enclosure
Cast aluminum with white powder coat finish, NEMA 4X, three-turn screw-on cover, SST Shaft
Temperature
-40°C to +85°C (-40°F to +185°F) ambient temperatures; Up to +200°C (+400°F) process temperatures
Pressure
30 PSI, 0.5-micron particle size
Mounting
11⁄4-in NPT
Conduit Entry
Dual 3⁄4-in NPT
Hazardous Area Ratings
CSA - Class I, Groups C & D
CSA - Class II, Groups E, F, & G
Note: For additional information on the TRX-PLUS units with enhanced fail safe and monitoring capabilities, please contact Thermo Fisher Scientific.
Thermo Scientific Ramsey TRX Series Rotary Point Level Control Specification Drawing
Sample Paddle Specification Drawings
RP-1
Ø177.8 mm
(Ø7.0 in)
175 mm (6.9 in)
1¼ in – 11 ½
NPT Threads
22 mm
(0.9 in)
9 mm
(0.37 in)
Ø118 mm
(Ø4.6 in)
50.80 mm (2.0 in)
RP-2
51 mm
(2.0 in)
Ø128.6 mm
(Ø5.06 in)
38.09 mm (1.5 in)
93 mm (3.6 in)
73 mm (2.9 in)
RP-3
50.80 mm
(2.0 in)
Thermo Scientific Ramsey TRX Series Rotary Point Level Control with cover removed
56.23 mm
(2.21 in)
RP-23
Relay Condition
Contact position when
the relay is de-energized
SI
(–) (+)
HIGH
FAIL SAFE
LOW
N
L
1NC 1C 1N0 2N0 2C 2NC
Power in-line or (+) on DC models
Power in-neutral/line or (–) on DC models
Fail Safe
Paddle Condition
Switch
Covered
Position Uncovered
High
Energized De-energized
Low
De-energized Energized
Contacts rated 10 amps @ 250 VAC
163.26 mm (6.13 in)
86.98 mm
(3.12 in)
RP-28
Ø177.8 mm
(Ø7.0 in)
GROUND
127.0 mm (5.0 in)
© 2011 Thermo Fisher Scientific Inc. All rights reserved. Results may vary under different operating conditions. Specifications, terms and pricing are subject to change.
Not all products are available in all countries. Please consult your local sales representative for details. Literature Code PI.8091.1111
Bulk Weighing
& Monitoring
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www.thermoscientific.com/bulk-handling
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