Algas SDI TORREXX TX240 Manual

Vertical electric single core vaporizer
Operations & Maintenance
Manual
...Innovative liquid vaporizing and gas mixing solutions
151 South Michigan Street, Seattle, Washington, USA 98108
Tel: [phone] Fax: [phone] Web: www.algas-sdi.com
FILE: MANUAL PN 54629 TORREXX REV 11-2-21
Briana
2021.11.02
11:12:57
-07'00'

WARNING
Read the OPERATION MANUAL before operating this
equipment.
■ NOTE: Algas-SDI reserves the right to use alternate
manufacturers’ components as vendor delivery
applicability dictates. Vendors have supplied
literature contained in the Operation Manual. Please
check to be sure supplied data matches your
configuration. Contact Algas-SDI if any questions
exist.
■ This equipment uses LPG - a flammable fuel handled under
pressure. Inherent hazards exist and a thorough
understanding of the equipment is required to allow safe
operation and maintenance.
■ Allow only a TRAINED and FULLY QUALIFIED person to
service this equipment.
■Any time a component must be replaced use the same type,
model,etc. DO NOT SUBSTITUTE! The consequence from
such actions is unpredictable and may lead to dire
consequences. When components are replaced with
components not approved for use in our Nemko listed
equipment, the Nemko listing becomes void for that unit.

WARRANTY REGISTRATION
A Warranty Registration Card is located on the last page of this manual. Fill it out
and send a copy either by mail to the address shown at the bottom of the form or
submit via email to [e-mail].
WARRANTY, COPYRIGHTS AND APPROVALS
WARRANTY
Algas-SDI International, LLC (ASDI) warrants that the equipment is free of
defects in materials and workmanship under normal use and service. ASDI
agrees to repair or replace, at our option, without charge f.o.b. factory, any part
which has proven defective to the satisfaction of Algas-SDI International, LLC
within one (1) year from the date of the original installation or within 18 months
from the date of shipment, whichever is earlier. Equipment, which in the opinion
of ASDI, has been damaged by improper installation or operation, or has been
abused or tampered with in any way, will not be accepted for return under
warranty.
Algas-SDI International, LLC will not accept back charges for work performed by
others upon or in conjunction with ASDI equipment, unless prior authorization is
given by means of an Algas-SDI International, LLC purchase order. Algas-SDI
International, LLC will not be liable by reason of shutdown, non-operation or
increased expense of operation of other equipment, or any other loss or damage
of any nature, whether direct or consequential, arising from any cause
whatsoever.
Algas-SDI International, LLC makes NO other warranty of any kind, whatsoever
expressed or implied; and all warranties of merchantability and fitness for a
particular purpose are hereby disclaimed by Algas-SDI International, LLC and
excluded from these terms of sale. No person has any authority to bind Algas-
SDI International, LLC to any representation or warranty other than this warranty.
COPYRIGHT
Copyright 2021 by Algas-SDI International, LLC, Seattle, Washington 98108.
All rights reserved. No part of this manual may be reproduced or copied in any
form or by any means, photographic, electronic, or mechanical, without the prior
express written consent from Algas-SDI International, LLC, Seattle, Washington,
USA.
APPROVALS

SYMBOLS AND CONVENTIONS
Special symbols are used to denote hazardous or important
information. You should familiarize yourself with their meaning and
take special notice of the indicated information.
Please read the following explanations thoroughly.
GENERAL WARNING OR CAUTION
This symbol indicates hazards or unsafe practices, which can result
in damage to the equipment or cause personal injury. Use care and
follow the instructions given.
FLAMMABLE GAS HAZARD
This symbol indicates a potential hazard, which can result in severe
personal injury or death. Use extreme care and follow the
instructions given.
ELECTRICAL DISCONNECT REQUIRED
This symbol indicates a potentially dangerous situation, which can
result in severe personal injury or death or damage to equipment.
Use great care and follow the instructions given.
ASDI CONTACT NUMBERS
If you have questions, need help with your equipment, or want
information on other products, contact Algas-SDI at:
Telephone: [phone]
Facsimile: +1.206.789.5414
Email:[e-mail]
Internet: http://www.algas-sdi.com

TORREXX TABLE of CONTENTS
1. INTRODUCTION
DESCRIPTION 1-1
Figure 1 – TORREXX SSR Dimensional Drawing 1-2
TORREXX VAPORIZER OPTIONS 1-3
2. MAJOR COMPONENTS
DESCRIPTION 2-6
Figure 2 – Heating System 2-6
Figure 3 – Liquid Passage Prevention System 2-7
MAJOR COMPONENTS LIST 2-8
Figure 4 – TORREXX SSR Major Components Drawing 2-8
3. INSTALLATION
GENERAL 3-10
Figure 5 – Typical TORREXX Installation Drawing with Pump & Vapor Bypass 3-10
Figure 6 – Typical TORREXX Installation Drawing with Vapor Bypass & No Pump 3-11
Figure 7 – Typical TORREXX Installation Drawing with Economy Operation &
Vapor Bypass 3-11
Figure 8 – Typical TORREXX Installation Drawing for Manifolding 2 Vaporizers 3-12
Figure 9 – Typical TORREXX Installation Drawing for Manifolding 3 Vaporizers 3-12
LIQUID LINE 3-13
LIQUID PUMP 3-13
VAPOR LINE 3-13
SAFETY RELIEF VALVE 3-14
ELECTRICAL SERVICE 3-14
GROUNDING 3-14
WIRE SIZE 3-15
Table 1 – Wire Length Chart (#4 AWG, 25 mm2)3-16
Table 2 – Wire Length Chart (#6 AWG, 16 mm2)3-16
Table 3 – Wire Length Chart (#8 AWG, 10 mm2)3-17
Table 4 – Wire Length Chart (#10 AWG, 6 mm2)3-17
Table 5 – Liquid Temperature vs. Tank Pressure Chart 3-18
Table 6 – LPG Liquid Line Sizing Chart (Minimum Pipe Size) 3-19
Table 7 – Equivalent Pipe Length of Various Valves and Fittings 3-19

TORREXX TABLE of CONTENTS - Continued
4. OPERATION
GENERAL 4-20
OPERATING INSTRUCTIONS 4-20
STARTING THE VAPORIZER 4-20
STOPPING THE VAPORIZER 4-21
PURGING THE VAPORIZER 4-21
5. MAINTENANCE
GENERAL 5-22
INITIAL INSTALLATION AND OPERATION INSPECTIONS 5-22
ANNUAL MAINTENANCE REQUIREMENTS 5-23
Liqui-SAFE VALVE – PERFORMANCE CHECK 5-24
Figure 10 – Steps to check Liqui-SAFE valve operation. 5-24
Liqui-SAFE VALVE – SERVICE INSTRUCTIONS 5-25
Figure 11A – STEP 1 – Be sure the Liqui-SAFE valve
is in the closed position as shown. 5-25
Figure 11B – STEP 2 – Unscrew reset button base and remove the spring. 5-25
Figure 11C – STEP 3 – Replace button post internal O-ring. 5-26
Figure 11D – Full hook O-ring tool 5-26
Figure 11E – STEP 4 – Unscrew valve latch body. 5-26
Figure 11F – STEP 5 – Replace valve body static O-ring. 5-27
Figure 11G – STEP 6 – Replace valve seat and valve stem base O-rings. 5-27
6. TROUBLESHOOTING
TROUBLESHOOTING TREES 6-28
FULL LOAD VOLTAGE CHECK 6-34
Figure 12 – Full Load Voltage Check 6-34
FULL LOAD CURRENT CHECK 6-35
Figure 13 – Full Load Current Check 6-35
TORREXX ELECTRIC VAPORIZER DATA SHEET 6-36
HEATER CORE RESISTANCE 6-37
Figure 14 – Heater Core Resistance Check 6-37
SOLENOID VALVE LEAK TEST 6-38
Figure 15 – Solenoid Valve Leak Test Components 6-38

TORREXX TABLE of CONTENTS - Continued
SOLENOID VALVE ELECTRICAL TEST 6-39
Figure 16 – Solenoid Valve Electrical Test 6-39
7. TORREXX OPTIONS
ECONOMY OPERATION 7-40
Figure 17 – TORREXX Economy Valve Installation 7-40
TORREXX ECONOMY VALVE MAINTENANCE 7-41
Figure 18A – STEP 1 – Unscrew the inlet housing from the outlet housing. 7-41
Figure 18B – STEP 2 – Remove old O-rings and clean all piston surfaces. 7-41
Figure 18C – STEP 3 – Clean all O-ring contact surfaces and the
bottom surface of the outlet housing. Apply excess lithium O-ring grease
to inside of both housings. 7-42
Figure 18D – STEP 4 – Replace the three O-rings contained in the Economy
Valve repair kit. Apply excess lithium O-ring grease to all O-rings. 7-42
Figure 18E – STEP 5 – Make sure that the pin hole is clear and the spring is
undamaged. Carefully reassemble all the parts. Apply lubrication grease on the
straight threads if necessary. The inlet housing MUST be screwed all the way down
for the valve to accurately function at the set pressure. DO NOT apply sealant
agent or Teflon tape on these threads. 7-42
TX REMOTE BOX 7-43
Figure 19 – Remote START/STOP Box 7-43
VALVE AND STRAINER PACKAGE 7-44
FILTAIRE CONTAMINANT SEPARATOR 7-44
Figure 20 – FILTAIRE Operation 7-44
APPENDIX A – TECHNICAL INFORMATION
TORREXX LPG VAPORIZER DATA SHEETS (CE/NEMKO)
TORREXX ELECTRIC VAPORIZER SPARE PARTS AND ACCESSORIES (CE/NEMKO)
Figure 21 – TORREXX Electric Vaporizer Major Components and Accessories
HEATER BUSSING DIAGRAMS
EQUIPMENT DRAWINGS
INSTALLATION DRAWINGS
TORREXX WIRING SCHEMATIC
REMOTE BOX WIRING SCHEMATICS
ASCO SOLENOID VALVE USED BY ASDI
SOLENOID NOISE
SOLENOID VALVE INSTALLATION AND MAINTENANCE INSTRUCTIONS
WARRANTY REGISTRATION CARD – Refer to the nameplate on the unit to fill out the product
registration.

1-1 ASDI Operations and Maintenance – TX Models – P/N: 54629
INTRODUCTION 1
DESCRIPTION
The dimensional drawing (see page 1-2) identifies various components of the
Algas-SDI TORREXXTM SSR model vaporizer. This equipment is intended for
use with liquid propane, butane, or propane-butane mixtures. Multiple resistance
heating elements provide thermal energy to the finned aluminum heat exchanger.
A solid-state controller monitors the heat exchanger temperature and regulates
the operating temperature to a predetermined set point. The controls consist of 2
individual K-type thermocouple sensors with independent high temperature limits.
One sensor monitors operating temperature and the other controls the liquid inlet
solenoid valve. The liquid inlet solenoid valve does not open until a
predetermined warm-up temperature is reached.The vaporizer reaches
operating temperature in approximately 60 seconds from a cold start. The
vaporized LPG rises into the vapor header and exits through the vapor outlet.
The Liqui-SAFETM Valve is designed to prevent liquid from passing downstream.
TORREXXTM Vaporizer can be configured for many applications.
♦Standard configuration for Zone I for use with Propane and LPG, DNV GL
Nemko Presafe & CE mark. In this configuration the TORREXXTM complies
with the following standards:
oEN 60079-0:2012/A11:2013 (IEC 60079-0 ed. 6.0)
oEN 60079-1:2014 (IEC 60079-1 ed. 7.0)
oEN 60079-18:2015 (IEC 60079-18 ed. 4.0)
♦TORREXXTM vaporizer can be manifolded together for increased capacity on
a single skid. Consult Algas-SDI for Configuration information.
♦TORREXXTM vaporizer can be packaged with an Algas-SDI mixing system
on a single skid. Consult Algas-SDI for Configuration information.
♦For customizing the TORREXXTM vaporizer to your requirements consult
Algas-SDI for information.

ASDI Operations and Maintenance – TX Models – P/N: 54629 1-2
Figure 1 – TORREXX SSR Dimensional Drawing

1-3 ASDIOperations and Maintenance – TX Models – P/N: 54629
TORREXX VAPORIZER OPTIONS
Optional items for the TORREXXTM vaporizer are designed to enhance
convenience for the end user and can be applied in the field to all models.
This section provides a brief introduction to the options available for the
TORREXXTM. See SECTION 7 of this manual or contact Algas-SDI for more
information.
1) Valve and Strainer Package – Includes strainer with magnetic plug, inlet
shut-off angle valve, hydrostatic relief valve, outlet shut-off ball valve and
outlet pressure gauge. Ships loose. All items not shown below.
2) Pipe Away Adapter –Allows the user to pipe the relief valve away from the
vaporizer. Fits relief valve P/N 34876. 1” FNPT pipe connection.
3) TORREXX Stand –Elevates TORREXXTM about 1 ft (30 cm) off the ground
for ease of control box access and removes the vaporizer from elements i.e.
snow and mud. Hardware to mount TORREXXTM to the stand is included.
Ships loose.

ASDI Operations and Maintenance – TX Models – P/N: 54629 1-4
4) Economy Valve – Allows use of propane storage tank natural vaporization
when the storage tank can provide enough vaporization and pressure to
satisfy the load requirements.
5) Remote Start/Stop Box – Includes remote start/stop capability and a status
light indicating the vaporizer is ready for operation (solenoid valve open).
IP65 (NEMA 4) enclosure. Must be installed outside Zone 1 and 2 (IP65).
6) Drain valve kit – Enables the user to drain the oils, heavy ends, and other
impurities that can collect over time in the vaporizer heat exchanger. Kit
available factory or field installed.
7) Stabilaire Pump Package – Consult factory
8) FILTAIRETM Contaminant Separator – The Algas-SDI FILTAIRETM is a
filtering device designed to trap heavy hydrocarbons commonly present in
LP-gas vapor. It also traps other materials, which may be in gas due to
storage conditions and internal condition of the equipment.
9) Balancing orifice – When installing multiple vaporizers in parallel, balancing
orifices should be installed at the outlet of each vaporizer to properly balance
the load between the vaporizers and achieve full combined capacity.

1-5 ASDIOperations and Maintenance – TX Models – P/N: 54629
SAFETY
CAUTION
Propane Odor can fade.
CAUTION
Vaporizer may be hot after or during use.
CAUTION
Allow only a TRAINED and FULLY QUALIFIED person to service this
equipment.

ASDI Operations and Maintenance – TX Models – P/N: 54629 2-6
MAJOR COMPONENTS 2
The TORREXXTM is designed to be reliable and user friendly. Several features
allow you to quickly determine the status of your vaporizer.
There are two basic control systems within a TORREXXTM:
1) Heating System – Figure 2
2) Liquid Passage Prevention System – Figure 3
Figure 2 – Heating System
TX320 SSR SHOWN
•SELF REGULATING HEATING SYSTEM
•NO START/STOP SWITCHES
•ENGAGES AUTOMATICALLY
•JUST APPLY POWER TO TURN VAPORIZER ON
POWER DISTRIBUTION BLOCK
UNUSED
ENTRY /
CUSTOMER
ELECTRICAL
CONNECTION
(M32 X 1.5)
SOLID-STATE
RELAYS
TEMPERATURE CONTROLLER
DETECTS HEAT EXCHANGER
TEMPERATURE VIA DUAL K TYPE
THERMOCOUPLE
TEMPERATURE ACTIVATED
CIRCUIT OPENS AT 55°C OR
131°F WITH SOLENOID VALVE
TO ENSURE AUTOMATIC
RESTART AFTER POWER
INTERRUPTION

2-7 ASDI Operations and Maintenance – TX Models – P/N: 54629
Figure 3 – Liquid Passage Prevention System
•RED FLAG INDICATES STATUS
•VALVE IS TRIPPED WHEN FLAG
IS UP (AS SHOWN)
VALVE IS IN OPERATING
POSITION WHEN FLAG IS
DOWN (AS SHOWN)
•FLOAT BALL ACTIVATED
MANUAL RESET Liqui-SAFE
VALVE DETECTS AND
PREVENTS LIQUID FROM
PASSING THROUGH
•THE Liqui-SAFE VALVE CAN
BE MANUALLY TRIPPED TO
VERIFY CLOSING INTEGRITY
FLOAT BALL

ASDI Operations and Maintenance – TX Models – P/N: 54629 2-8
Figure 4 – TORREXX SSR Major Components Drawing
1) Liquid Inlet Solenoid Valve
2) Valve, Gauge and Strainer kit components (Optional)
3) Transformer
4) Temperature Controller Board
5) Economy Valve (Optional)
6) Liqui-SAFETM Valve with manual reset
7) Insulation Jacket
8) Solid-State Relays
1
7
3
4
6
2
2
8
2
5

3-9 ASDIOperations and Maintenance – TX Models – P/N: 54629
INSTALLATION 3
WARNING
The equipment described in this manual is designed to operate with
LP-gas, a flammable fuel under pressure. The nature of the
application involves inherent hazards that could result in injury.
Only a TRAINED and FULLY QUALIFIED person should service this
equipment.
NOTE
Prior to installing your new TORREXXTM vaporizer, check all
relevant codes and standards that apply in your local area to ensure
compliance!
CAUTION
To prevent ignition of hazardous atmospheres:
Keep flameproof enclosure cover tight, torque to 26.6 Nm (19.6
ft. lbs.) while in service and disconnect power before installing
or removing unit from service.
NOTE
Installer must install a terminal box (connection facility).
Metal Terminal Box (M32x1.5)
Ex d II A Gb, (ATEX certified or equivalent) - marking for Europe
WARNING
Potential electrostatic charging hazard. Clean insulation with a
damp cloth.
CAUTION
Connect only metal electrical conduit or armored cable to the vaporizer
sealing fitting.
CAUTION
Internal ground connection is provided by factory.

ASDI Operations and Maintenance – TX Models – P/N: 54629 3-10
GENERAL
Install the TORREXXTM vaporizer on a level firm base at least 6” (15 cm) above
grade and secure it through the four ½” (13 mm) holes. Protect the equipment
against damage from moving vehicles by use of an appropriate barrier. Consult
state, provincial, insurance carriers, and local authorities for installation
requirements. Clean all foreign material from all pipelines prior to making final
connections. All joints require a pipe sealant approved for LPG, depending on
type of service. Test for leaks using an inert gas, such as compressed carbon
dioxide or nitrogen, at 1½ times the working pressure or as required by
applicable codes. Check all connections using an appropriate leak detection
solution or device. Even very small leaks are unacceptable. Eliminate all leaks
prior to operation. Ensure installation environment does not exceed 50°C.
Install in accordance with applicable codes and local regulations as required.
Explosion proof seal off must carry the same approvals as the vaporizer to
maintain the approval of the overall installation.
Figure 5 - Typical TORREXX Installation Drawing with Pump & Vapor Bypass
Note: The vapor bypass line is not required except when you have the Economy Operation option.
However, it is recommended to install a bypass line on all installations because it will provide a back-
up supply of vapor from the tank to the load in case of vaporizer failure or power interruption.
Vaporizer will operate properly without the bypass.
TANK VAPOR
PRESSURE
REGULATOR*
ISOLATION
VALVE*
VAPOR BY-PASS LINE
OPTIONAL
LIQUID
VAPORIZER REGULATOR*
STRAINER WITH
MAGNET FOR IRON
PARTICLE PICK-UP*
SEAL OFF REQUIRED*
ELECTRIC SERVICE
REQUIRED*
OUTLET ISOLATION
VALVE”
(VAPOR)
TO LOAD
STORAGE TANK
ISOLATION VALVE
W/HYDROSTATIC
RELIEF*
NOTES
1. LIQUID PIPING LOSSES BETWEEN VAPORIZER AND THE TANK
MUST NOT EXCEED HYDROSTATIC HEAD WHEN THE PUMP IS
SHUT OFF.
2. INSTALL VAPORIZER 1ST STAGE REGULATOR UPSTREAM OF
VAPOR BYPASS LINE CONNECTION TO MAIN VAPOR LINE.
3. SET 1ST STAGE VAPORIZER REULATOR 2-4 PSIG (0.1-0.3 BAR)
HIGHER THAN TANK VAPOR PRESSURE REGULATOR SET-
POINT.
4. NO CHECK VALVES IN LIQUID LINE. LIQUID MUST BE ABLE TO
FLOW IN BOTH DIRECTIONS.
*BY OTHERS
ISOLATION
VALVE*
PRESSURE GAUGE*

3-11 ASDIOperations and Maintenance – TX Models – P/N: 54629
Figure 6 - Typical TORREXX Installation Drawing with Vapor Bypass & No Pump
Figure 7 - Typical TORREXX Installation Drawing with Economy Operation & Vapor Bypass
Note: Economy Option cannot be used on an installation that requires a pump.
NOTES
1. LIQUID PIPING LOSSES BETWEEN VAPORIZER AND THE TANK
MUST NOT EXCEED HYDROSTATIC HEAD.
2. INSTALL VAPORIZER 1ST STAGE REGULATOR UPSTREAM OF
VAPOR BYPASS LINE CONNECTION TO MAIN VAPOR LINE.
3. SET 1ST STAGE VAPORIZER REULATOR 2-4 PSIG (0.1-0.3 BAR)
HIGHER THAN TANK VAPOR PRESSURE REGULATOR SET-
POINT.
4. NO CHECK VALVES IN LIQUID LINE. LIQUID MUST BE ABLE TO
FLOW IN BOTH DIRECTIONS.
*BY OTHERS
STORAGE TANK
STORAGE TANK
ISOLATION
VALVE*
ISOLATION
VALVE*
TANK VAPOR
PRESSURE
REGULATOR*
TANK VAPOR
PRESSURE
REGULATOR*
VAPOR BY-PASS LINE
VAPOR BY-PASS LINE
OUTLET ISOLATION VALVE”
OUTLET ISOLATION VALVE*
VAPORIZER
REGULATOR*
VAPORIZER
REGULATOR*
LIQUID
LIQUID
ISOLATION VALVE”
ISOLATION VALVE”
SEAL OFF REQUIRED*
SEAL OFF REQUIRED*
ELECTRIC SERVICE
REQUIRED*
ELECTRIC SERVICE
REQUIRED*
(VAPOR)
TO LOAD
(VAPOR)
TO LOAD
STRAINER WITH
MAGNET FOR IRON
PARTICLE PICK-UP*
STRAINER WITH
MAGNET FOR IRON
PARTICLE PICK-UP*
ISOLATION VALVE
W/HYDROSTATIC
RELIEF*
ISOLATION VALVE
W/HYDROSTATIC
RELIEF*
PRESSURE GAUGE*
NOTES
1. LIQUID PIPING LOSSES BETWEEN VAPORIZER AND THE TANK
MUST NOT EXCEED HYDROSTATIC HEAD.
2. INSTALL VAPORIZER 1ST STAGE REGULATOR UPSTREAM OF
VAPOR BYPASS LINE CONNECTION TO MAIN VAPOR LINE.
3. SET 1ST STAGE VAPORIZER REULATOR 2-4 PSIG (0.1-0.3 BAR)
HIGHER THAN TANK VAPOR PRESSURE REGULATOR SET-
POINT.
4. NO CHECK VALVES IN LIQUID LINE. LIQUID MUST BE ABLE TO
FLOW IN BOTH DIRECTIONS.
*BY OTHERS
PRESSURE GAUGE*
ASDI ECONOMY VALVE
SENSES UPSTREAM
PRESSURE
ISOLATION
VALVE*
ISOLATION
VALVE*

ASDI Operations and Maintenance – TX Models – P/N: 54629 3-12
Figure 8 – Typical TORREXX Installation for Manifolding 2 Vaporizers.
Figure 9 – Typical TORREXX Installation for Manifolding 3 Vaporizers.
OVERSIZED COMMON
HEADER
Liqui-SAFE VALVE
TORREXX VAPORIZER
LIQUID IN
VAPOR OUT
LIQUID INLET STRAINER
W/MAGNET FOR IRON
PARTICLE PICK-UP
LIQUID INLET STRAINER
W/MAGNET FOR IRON
PARTICLE PICK-UP
LIQUID INLET STRAINER
W/MAGNET FOR IRON
PARTICLE PICK-UP
LIQUID IN
TORREXX VAPORIZER
OVERSIZED COMMON
HEADER
Liqui-SAFE VALVE
VAPOR OUT
NOTES:
1. USE 1” UNION AND BALL
VALVE WITH BALANCING
ORIFICES P/N 64004 ON ALL
VAPORIZER OUTLETS
2. USE ONLY ONE COMMON
REGULATOR AT THE OUTLET
3. ONLY VAPORIZERS OF SAME
SIZE AND APPLIED VOLTAGE
SHALL BE MANIFOLDED
TOGETHER
4. HEADERS MUST BE SIZED
APPROPRIATELY FOR THE
ENTIRE CAPACITY OF ALL
VAPORIZERS IN THE SYSTEM
5. IF COMMON HEADERS ARE
USED ON 3 OR MORE
VAPORIZERS, THERE MAY BE A
CAPACITY DE-RATE ON THE
SYSTEM. REFER TO DWG 5001-
8005 IN THE APPENDIX FOR
ILLUSTRATION OF BALANCED
PIPING WITH MULTIPLE
VAPORIZERS.
NOTES:
1. USE 1” UNION AND BALL
VALVE WITH BALANCING
ORIFICES P/N 64004 ON ALL
VAPORIZER OUTLETS
2. USE ONLY ONE COMMON
REGULATOR AT THE OUTLET
3. ONLY VAPORIZERS OF SAME
SIZE AND APPLIED VOLTAGE
SHALL BE MANIFOLDED
TOGETHER
4. HEADERS MUST BE SIZED
APPROPRIATELY FOR THE
ENTIRE CAPACITY OF ALL
VAPORIZERS IN THE SYSTEM
BALL VALVE WITH BALANCING ORIFICE
BALL VALVE WITH BALANCING ORIFICE

3-13 ASDIOperations and Maintenance – TX Models – P/N: 54629
LIQUID LINE
Size the liquid line from the storage tank to the vaporizer to supply the
vaporizer at full capacity with a minimal pressure drop. A liquid line-
sizing chart is provided in Table 6. Install a liquid line strainer with
magnet for iron particle pickup at the vaporizer inlet. Do not install the
liquid line such that it must pass above the vaporizer to enter the tank. It
is also recommended not to use liquid dip tube withdrawal (top
withdrawal) from the tank as vaporizer may experience difficulty pushing
liquid back at lower capacities.
CAUTION
A liquid pump must be installed if the pressure drop in the liquid
line between the vaporizer and the tank exceeds the hydrostatic
liquid head in the storage tank. ONE FOOT (30 CM) OF LIQUID
PROPANE EQUALS .21 PSI (.014 BAR)! Liquid line frosting
indicates too much pressure drop in the liquid line.
LIQUID PUMP
Is a Liquid Pump necessary? What are your vapor pressure requirements?
Pressure in the storage tank depends on temperature (See Table 5). A good
“rule of thumb” for determining when a Liquid Pump is necessary is if the storage
pressure will not always exceed the required distribution pressure by 5 PSI (0.35
bar), a pump is necessary. Install an ASDI STABILAIRETM Liquid Pump in the
liquid line close to the storage tank. To prevent cavitation, place the liquid
strainer at least five feet upstream of the pump inlet. Typically, a pump is not
required unless a mixing system is used or temperature at the installation will be
extremely low, causing the pressure to drop below the required process
pressure. When using a pump,vaporizer capacitymay decrease due to
increase in boiling point of LPG. Increasing boiling point requires larger
portion of heat exchanger area to be used for liquid heating instead for
boiling and vaporization. Please consult ASDI when using a pump.
VAPOR LINE
Install an appropriate regulator immediately downstream and at or above the
level of the vaporizer outlet. Connect pipe from the outlet port of the regulator to
the distribution system. Further reduction of downstream pressure requires a
“Second Stage” regulator close to the consuming equipment. Properly sized
piping and regulators will insure satisfactory service.
NOTE
For safety reasons both FIRST and SECOND stage regulators must
be 250 PSIG (17.58 bar) inlet pressure rated!