Gasboy 52 User manual

Model 52 Pressure Regulator Valve
Installation/Parts Manual
MDE-4645B

Computer Programs and Documentation
All Gasboy computer programs (including software on diskettes and within memory chips) and documentation are copyrighted by, and shall remain the property of, Gasboy. Such
computer programs and documents may also contain trade secret information. The duplication, disclosure, modification, or unauthorized use of computer programs or
documentation is strictly prohibited, unless otherwise licensed by Gasboy.
Federal Communications Commission (FCC) Warning
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy, and if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. Changes or modifications not expressly approved by
the manufacturer could void the user’s authority to operate this equipment.
Approvals
Patents
Gasboy products are manufactured or sold under one or more of the following US patents:
Dispensers
Point of Sale/Back Office Equipment
Trademarks
5,257,720
D335,673
Gasboy, Greensboro, is an ISO 9001:2000 registered facility.
Underwriters Laboratories (UL):
UL File# Products listed with UL
MH4314 All dispensers and self-contained pumping
units
MH6418
Power operated Transfer Pump Models 25,
25C, 26, 27, 28, 72, 72S, 72SP, 72X, 73 and
1820
MH7404 Hand operated Transfer Pump Models 1230
Series, 1243 Series, 1520 and 1720 Series
MH10581 Key control unit, Model GKE-B Series
Card reader terminals, Models 1000, 1000P
Site controller, Model 2000S CFN Series
Data entry terminals, Model TPK-900 Series
Fuel Point Reader System
National Conference of Weights and Measures (NCWM) - Certificate of Compliance (CoC):
Gasboy pumps and dispensers are evaluated by NCWM under the National Type Evaluation Program (NTEP). NCWM has issued the following CoC:
CoC# Product Model # CoC# Product Model # CoC# Product Model #
95-179A2 Dispenser 9100 Retail Series, 8700
Series, 9700 Series 91-019A2 Dispenser 9100 Commercial Series
95-136A5 Dispenser 9800 Series 91-057A3 Controller 1000 Series FMS,
2000S-CFN Series
New York City Fire Department (NYFD):
NYFD C of A # Product
4823 9100A, 9140A, 9152A, 9153A,
9800A, 9840A, 9850A, 9852A,
9853A, 9140
4997 9822A, 9823A
5046 9100Q, 9140Q, 9152Q, 9153Q,
9800Q, 9840Q, 9852Q, 9853Q
5087 8753K, 8853K, 9153K, 9853K
(restricted to diesel and non-
retail gasoline sales)
California Air Resources Board (CARB):
Executive Order # Product
G-70-52-AM Balance Vapor Recovery
G-70-150-AE VaporVac
Registered trademarks
ASTRA®
Fuel Point®
Gasboy®
Keytrol®
Slimline®
Additional US and foreign trademarks pending.
Other brand or product names shown may be
trademarks or registered trademarks of their
respective holders.
Non-registered trademarks
Atlas™
Consola™
Infinity™
This document is subject to change without notice.
E-mail: [email protected] · Internet: http://www.gasboy.com
 2019 GASBOY. All Rights Reserved
Additional US and foreign patents pending.

MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page i
Table of Contents
1 – Introduction 1
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Abbreviations and Acronyms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 – Important Safety Information 3
3 – Installation 7
Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Valve Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 – Parts 11
Model 52 Pressure Regulator Valve Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Page ii MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019
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MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 1
Purpose Introduction
1 – Introduction
Purpose
The Model 52 Pressure Regulator Valve Installation/Parts Manual is provided to assist the
installer in installing and operating the unit and should be provided to the installer prior to the
installation of conduit. Faulty installations are the major cause for unit malfunctions. The
Model 52 Pressure Regulator Valve must be installed and operated as described in this manual.
Ensure that you leave this manual with the owner after the installation is complete.
Note: Customers and installers who have queries pertaining to the installation should contact
their Gasboy®distributor.
The Model 52 Pressure Regulator Valve is a unique control valve developed for use with
suction-type island dispensers. The Model 52 Pressure Regulator can be used for
Aboveground Storage Tank (AST) installations or in booster systems with a submersible pump
in an Underground Storage Tank (UST).
The standard Model 52 Pressure Regulator Valve can be used in temperatures between -13 °F
to 130 °F (-25 °C to 54 °C). The Model 52 is not for use with gasoline fuels containing
methanol or ethanol blends greater than 10%.
Abbreviations and Acronyms
Warranty
For information on warranty, refer to MDE-4255 Gasboy Warranty Policy Statement. If you
have any warranty-related questions, contact Gasboy’s Warranty Department at its Greensboro
location.
Term Description
AST Aboveground Storage Tank
NEC National Electrical Code
NFPA National Fire Protection Association
PSI Pounds per Square Inch
UST Underground Storage Tank

Introduction Warranty
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MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 3
Important Safety Information
Notes: 1) Save this Important Safety Information section in a
readily accessible location.
2) Although DEF is non-flammable, Diesel is flammable.
Therefore, for DEF cabinets that are attached to
Diesel dispensers, follow all the notes in this section
that pertain to flammable fuels.
This section introduces the hazards and safety precautions
associated with installing, inspecting, maintaining, or servicing
this product. Before performing any task on this product, read this
safety information and the applicable sections in this manual,
where additional hazards and safety precautions for your task will
be found. Fire, explosion, electrical shock, or pressure release
could occur and cause death or serious injury, if these safe
service procedures are not followed.
Preliminary Precautions
You are working in a potentially dangerous environment of
flammable fuels, vapors, and high voltage or pressures. Only
trained or authorized individuals knowledgeable in the related
procedures should install, inspect, maintain, or service this
equipment.
Emergency Total Electrical Shut-Off
The first and most important information you must know is how to
stop all fuel flow to the pump/dispenser and island. Locate the
switch or circuit breakers that shut off all power to all fueling
equipment, dispensing devices, and Submerged Turbine Pumps
(STPs).
Total Electrical Shut-Off Before Access
Any procedure that requires access to electrical components or
the electronics of the dispenser requires total electrical shut off of
that unit. Understand the function and location of this switch or
circuit breaker before inspecting, installing, maintaining, or
servicing Gilbarco equipment.
Evacuating, Barricading, and Shutting Off
Any procedure that requires access to the pump/dispenser or
STPs requires the following actions:
• An evacuation of all unauthorized persons and vehicles from
the work area
• Use of safety tape, cones, or barricades at the affected
unit(s)
• A total electrical shut-off of the affected unit(s)
Read the Manual
Read, understand, and follow this manual and any other labels or
related materials supplied with this equipment. If you do not
understand a procedure, call the Gilbarco Technical Assistance
Center (TAC) at 1-800-743-7501. It is imperative to your safety
and the safety of others to understand the procedures before
beginning work.
Follow the Regulations
Applicable information is available in National Fire Protection
Association (NFPA) 30A; Code for Motor Fuel Dispensing
Facilities and Repair Garages, NFPA 70; National Electrical Code
(NEC), Occupational Safety and Health Administration (OSHA)
regulations and federal, state, and local codes. All these
regulations must be followed. Failure to install, inspect, maintain,
or service this equipment in accordance with these codes,
regulations, and standards may lead to legal citations with
penalties or affect the safe use and operation of the equipment.
Replacement Parts
Use only genuine Gilbarco replacement parts and retrofit kits on
your pump/dispenser. Using parts other than genuine Gilbarco
replacement parts could create a safety hazard and violate local
regulations.
Federal Communications Commission (FCC) Warning
This equipment has been tested and found to comply with the
limits for a Class A digital device pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy, and if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to
correct the interference at his own expense. Changes or
modifications not expressly approved by the manufacturer could
void the user’s authority to operate this equipment.
Safety Symbols and Warning Words
This section provides important information about warning
symbols and boxes.
Alert Symbol
This safety alert symbol is used in this manual and on
warning labels to alert you to a precaution which must be
followed to prevent potential personal safety hazards. Obey
safety directives that follow this symbol to avoid possible injury or
death.
Signal Words
These signal words used in this manual and on warning labels
tell you the seriousness of particular safety hazards. The
precautions below must be followed to prevent death, injury, or
damage to the equipment:
DANGER: Alerts you to a hazard or unsafe practice
which will result in death or serious injury.
WARNING: Alerts you to a hazard or unsafe practice that
could result in death or serious injury.
CAUTION with Alert symbol: Designates a hazard or
unsafe practice which may result in minor injury.
CAUTION without Alert symbol: Designates a hazard or
unsafe practice which may result in property or
equipment damage.
Working With Fuels and Electrical Energy
Prevent Explosions and Fires
Fuels and their vapors will explode or burn, if ignited. Spilled or
leaking fuels cause vapors. Even filling customer tanks will cause
potentially dangerous vapors in the vicinity of the dispenser or
island.
DEF is non-flammable. Therefore, explosion and fire safety
warnings do not apply to DEF lines.
The EMERGENCY STOP, ALL STOP, and PUMP
STOP buttons at the cashier’s station WILL NOT
shut off electrical power to the pump/dispenser. This
means that even if you activate these stops, fuel
may continue to flow uncontrolled.
You must use the TOTAL ELECTRICAL SHUT-OFF
in the case of an emergency and not the console’s
ALL STOP and PUMP STOP or similar keys.
!
WARNING
!
2 – Important Safety Information
!
!
!

No Open Fire
Open flames from matches, lighters, welding torches,
or other sources can ignite fuels and their vapors.
No Sparks - No Smoking
Sparks from starting vehicles, starting, or using power tools,
burning cigarettes, cigars, or pipes can also ignite fuels and
their vapors. Static electricity, including an electrostatic charge
on your body, can cause a spark sufficient to ignite fuel vapors.
Every time you get out of a vehicle, touch the metal of your
vehicle, to discharge any electrostatic charge before you
approach the dispenser island.
Working Alone
It is highly recommended that someone who is capable of
rendering first aid be present during servicing. Familiarize
yourself with Cardiopulmonary Resuscitation (CPR) methods, if
you work with or around high voltages. This information is
available from the American Red Cross. Always advise the
station personnel about where you will be working, and caution
them not to activate power while you are working on the
equipment. Use the OSHA Lockout/Tagout procedures. If you
are not familiar with this requirement, refer to this information in
the service manual and OSHA documentation.
Working With Electricity Safely
Ensure that you use safe and established practices in working
with electrical devices. Poorly wired devices may cause a fire,
explosion, or electrical shock. Ensure that grounding
connections are properly made. Take care that sealing devices
and compounds are in place. Ensure that you do not pinch
wires when replacing covers. Follow OSHA Lockout/Tagout
requirements. Station employees and service contractors need
to understand and comply with this program completely to
ensure safety while the equipment is down.
Hazardous Materials
Some materials present inside electronic enclosures may
present a health hazard if not handled correctly. Ensure that
you clean hands after handling equipment. Do not place any
equipment in the mouth.
In an Emergency
Inform Emergency Personnel
Compile the following information and inform emergency
personnel:
• Location of accident (for example, address, front/back of
building, and so on)
• Nature of accident (for example, possible heart attack, run
over by car, burns, and so on)
• Age of victim (for example, baby, teenager, middle-age,
elderly)
• Whether or not victim has received first aid (for example,
stopped bleeding by pressure, and so on)
• Whether or not a victim has vomited (for example, if
swallowed or inhaled something, and so on)
IMPORTANT: Oxygen may be needed at scene if gasoline has
been ingested or inhaled. Seek medical advice immediately.
Lockout/Tagout
Lockout/Tagout covers servicing and maintenance of machines
and equipment in which the unexpected energization or 
start-up of the machine(s) or equipment or release of stored
energy could cause injury to employees or personnel. 
Lockout/Tagout applies to all mechanical, hydraulic, chemical,
or other energy, but does not cover electrical hazards. 
Subpart S of 29 CFR Part 1910 - Electrical Hazards, 29 CFR
Part 1910.333 contains specific Lockout/Tagout provision for
electrical hazards.
The pump/dispenser contains a chemical known to the
State of California to cause cancer.
WARNING
!
Gilbarco Veeder-Root encourages the recycling of
our products. Some products contain electronics,
batteries, or other materials that may require special
management practices depending on your location.
Please refer to your local, state, or country
regulations for these requirements.
The pump/dispenser contains a chemical known to the
State of California to cause birth defects or other
reproductive harm.
WARNING
!
Gasoline/DEF ingested may cause
unconsciousness and burns to internal organs.
Do not induce vomiting. Keep airway open.
Oxygen may be needed at scene. Seek medical
advice immediately.
!
DEF generates ammonia gas at higher temperatures.
When opening enclosed panels, allow the unit to air out to
avoid breathing vapors. If respiratory difficulties develop,
move victim away from source of exposure and into fresh
air. If symptoms persist, seek medical attention.
WARNING
!
WARNING
Gasoline inhaled may cause unconsciousness
and burns to lips, mouth, and lungs. Keep airway
open. Seek medical advice immediately.
WARNING
!
Gasoline/DEF spilled in eyes may cause burns to
eye tissue. Irrigate eyes with water for
approximately 15 minutes. Seek medical advice
immediately.
WARNING
!
Gasoline/DEF spilled on skin may cause burns.
Wash area thoroughly with clear water.
Seek medical advice immediately.
WARNING
!
DEF is mildly corrosive. Avoid contact with eyes, skin, and
clothing. Ensure that eyewash stations and safety
showers are close to the work location. Seek medical
advice/recommended treatment if DEF spills into eyes.
WARNING
!
Page 4 MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019
Important Safety Information

MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 5
Important Safety Information
Hazards and Actions
The following actions are recommended regarding these hazards:
• Do not go near a fuel spill or allow anyone else in the area.
• Use station EMERGENCY CUTOFF immediately. Turn off all system circuit breakers to the island(s).
• Do not use console E-STOP, ALL STOP and PUMP STOP to shut off power. These keys do not
remove AC power and do not always stop product flow.
• Take precautions to avoid igniting fuel. Do not allow starting of vehicles in the area. Do not allow
open flames, smoking or power tools in the area.
• Do not expose yourself to hazardous conditions such as fire, spilled fuel or exposed wiring.
• Call emergency numbers.
WARNING
Spilled fuels, accidents involving pumps/dispensers, or uncontrolled fuel flow create a
serious hazard.
Fire or explosion may result, causing serious injury or death.
Follow established emergency procedures.
!
Collision of a Vehicle with Unit Fire at Island Fuel Spill

Page 6 MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019
Important Safety Information
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MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 7
Installation Precautions Installation
3 – Installation
Installation Precautions
All tanks and installations must conform with all building/fire codes, all Federal, State, and
Local codes, National Electrical Code (NFPA 70), NFPA 30, Automotive and Marine Service
Station Code (NFPA 30A), and NFPA 395 codes and regulations.
Plan your installation carefully. Dispensing troubles, which seem to be pump-related, are
frequently traced to faulty installation. Review the following list of installation DOs and
DO NOTs to avoid potential problems:
•DO read the “Important Safety Information” on page 3. It contains important information
regarding the safe use of fuel dispensing equipment.
•DO have the valve installed by a qualified installer.
•DO remove the shipping plug from the vent opening for proper operation of valve.
•DO NOT experiment with fuel dispensing equipment if you are not sure whether the
installation is correct.
•DO NOT install any underground piping without proper swing joints. Always use
shoulder nipples, never close nipples.
•DO NOT cover any lines until they have been both air and liquid-tested.
•DO NOT back-fill the tank or supply line with cinders or ashes. Back-fill with clean sand,
crushed rock, or pea gravel.
•DO NOT use black iron pipe or fittings for underground installations. Use only new
galvanized or fiberglass* pipe and fittings.
* Install all fiberglass pipe and fittings according to manufacturer’s specifications and
requirements.
•DO NOT install the fill pipe to a tank where it can be submerged with standing water.
•DO NOT use the Gasboy fuel dispensing equipment to remove water ballast from the
storage tank.
•DO NOT use gaskets on covers of explosion-proof type boxes. The sealing compound
found at various locations within conduit is a requirement of the National Electrical Code
and should not be disturbed. Tighten the Junction Box covers before replacing panels.

Installation Valve Requirements
Page 8 MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019
Valve Requirements
The requirements of the Model 52 Pressure Regulator Valve are as follows:
• It must conform with all building/fire codes, all Federal, State, and Local codes, National
Electrical Code (NFPA 70), NFPA 30, Automotive and Marine Service Station Code
(NFPA 30A), and NFPA 395 codes and regulations.
• It is designed to operate in fueling systems that have a maximum pressure of 50 psi.
• Installation must include thermal expansion relief valves. Thermal expansion can cause
pressures in the system greater than 50 psi and can result in failure of the valve and loss of
product to the environment.
• Installation must include a solenoid valve positioned adjacent to the shutoff valve at the
tank. Its purpose is to prevent loss due to failure of the downstream piping or the system.
• Installation must locate the shear groove at the same level as the top of the concrete island
+1/2-inch (13-mm).
• Installation must include shutoff or gate valve to close the system and prevent product loss
when the equipment utilized in the fueling system downstream from the AST is being
serviced or replaced.
Refer to Figure 3-1 on page 9, Figure 3-2 on page 9, Figure 3-3 on page 10, and Figure 3-4 on
page 10 for additional requirements.
Troubleshooting
Refer to the parts drawing Figure 4-1 on page 12 for item references.
Problem Possible Cause
Product leaking out valve vent and/or pumping unit
vent.
• Diaphragm (11) has failed and an obstruction in the valve is
holding open the poppet complete (12).
• Gasket (7) and Diaphragm (11) have failed.
• Pressure Relief Valve assembly (4) and Diaphragm (11)
have failed.
No delivery when pump is turned on. • Failed Diaphragm (11).
• Valve vent blocked or shipping plug never removed.
When a 52 valve is installed at the pump, never install a vacuum anti-siphon valve
at the top of a tank. An electric solenoid valve is required.
CAUTION

MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 9
Troubleshooting Installation
Figure 3-1: Flow Chart Model 52 Pressure Regulator
Figure 3-2: Schematic Piping Diagram
VENTTOTOPOF
STORAGETANK
OUTLETTOSUCTIONPUMP
VALVEACTUATOR
PISTON
POPPETASSEMBLY
PILOTVALVE
NOVACUUM,VALVE
WILLNOTOPEN
VENTTOTOPOF
STORAGETANK
NOTE:SUCTIONPUMPMUSTCREATE
1"ORMOREOFVACUUMTO
OPENVALVE.
SAFETYSHEAR
SECTION.
DIAPHRAGM
PILOTVALVE
SPRING
MAINVALVE
PISTONPOPPET
ASSEMBLY
PILOTVALVE
NOTE:INLETFROMOVERHEAD
STORAGETANKOR
BOOSTERSYSTEM.
STRAINERSCREENMUSTBE
CLEANEDREGULARLY.USESOLVENT
CLEANERANDSOFTBRUSH.
TOPREVENTCRUSHINGSCREEN
FIRSTINSERTSTRAINERSCREENINTOCAP
BEFOREREPLACINGINTOVALVEBODY.
NOTE:REGULATORHELDINCLOSEDPOSITION
BYHEADPRESSUREOFLIQUIDINOVERHEAD
STORAGETANK.
CLOSEDPOSITION
THEPURPOSEOFTHEMODEL52REGULATINGVALVEISTO
CONTROLTHEFLOWOFPRODUCTTHROUGHTHESUCTIONISLANDDISPENSER
WHENINSTALLEDWITHOVERHEADSTORAGETANKSORBOOSTERSYSTEMS.
OPERATIONOFTHEVALVEISHYDRAULIC.THEPILOTVALVE
MUSTBEOPENBEFOREPRODUCTCANFLOWTHROUGHTHESUCTIONISLAND
DISPENSER.
LIQUIDFLOWTHROUGHSTRAINERSCREEN
THEOPENINGOFTHEDISPENSINGNOZZLELEVERBYTHE
OPERATOROPENSTHEPILOTVALVEANDUNBALANCESTHE
PRESSUREINTHETOPSIDEOFTHEOPERATINGPISTON
POPPETASSEMBLY,WHICHINTURN,OPENSTHEMAINVALVE
ANDALLOWSPRODUCTTOFLOWTHROUGHTHESYSTEM.
THEMAINVALVEOPENSONLYENOUGHTOALLOWTHE
AMOUNTOFPRODUCTREQUIREDBYTHEDISPENSINGNOZZLE
TOPASSTHROUGHTHESUCTIONISLANDDISPENSER,THUS
PREVENTINGTHEAIRSEPARATORFROMOVERFLOWINGWHETHER
ORNOTTHESUCTIONISLANDDISPENSERISINOPERATION.
OPENPOSITION
THISISDUETOTHEDIFFERENTIALPRESSURE
CREATEDONTHEOPERATINGPISTONPOPPET
ASSEMBLYBYTHENOZZLE.WHENTHEDISPENSING
NOZZLEISCLOSED,THEPILOTVALVEWILLCLOSEAND
THEPRESSUREONBOTHSIDESOF
THEOPERATINGPISTONPOPPETASSEMBLYIS
EQUALIZED,WHICHALLOWSTHEMAINVALVETO
CLOSEANDSTOPTHEFLOWOFPRODUCTTHROUGH
THESYSTEM.
ABOVE
GROUND
STORAGE
TANK
FORSTORAGETANK
CONSTRUCTION
DETAIL
SEENFPA30A
WIRESOSOLENOIDVALVE
ISOPENONLYWHENPUMP
MOTORISRUNNING.
SHUTOFFVALVEREQUIREDBY
NFPA30PARA2-2.7.1
SOLENOIDVALVEREQUIREDBY
NFPA30PARA2-1.7
NOTE:
FORASINGLEDISPENSERINCOPORATINGMODELNO.52PRESSURE
REGULATORVALVE,ALLPIPINGMUSTBE1-1/2"MIN.FOR100'ORLESS
BETWEENTANK&SUCTIONPUMP.OVER100"BUTUNDER300'USE2"PIPE.
FORONETWINSINGLEPRODUCTSUCTIONPUMP,ALLPIPINGMUSTBE2"
MIN.FOR100'ORLESSBETWEENTANK&PUMPS.OVER100'BUTUNDER300'
USE2-1/2"PIPE.
WARNING
ALLVALVESINTHEPIPINGTOTHETOKHEIMMODEL52PRESSURE
REGULATORMUSTBEEQUIPPEDWITHTHERMALEXPANSIONRELIEF
VALVES.
SUCTIONPUMP
VALVEMUSTBESECURELY
ANCHOREDTOASUITABLEBRACE
IMBEDDEDINTHECONCRETETO
HELPPREVENTDAMAGEAND
LEAKINGFROMUNDERGOUND
PIPINGINTHEEVENTOFAN
ACCIDENT.
SHEARSECTIONEVEN
WITHTHEBOTTOM
OFPUMPBASE.
PIPEVENTTOTOP
OFSTORAGETANK.
LOCATIONOFTOKHEIMMODEL
NO.52PRESSUREREGULATOR.
TOKHEIMMODEL52PRESSURE
REGULATORMUSTBEINSTALLED
ANDLISTEDINACCORDANCE
WITHTHELATESTREQUIREMENTS
OFNFPA70,NFPA30&NFPA30A.
1-1/2"RISER

Installation Troubleshooting
Page 10 MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019
Figure 3-3: Booster System with Model 52 Pressure Regulators
Figure 3-4: Approximate Overall Dimensions of Model 52 Pressure Regulator
TANK
SUMP
TORELAY&
SERVICE
90°ELBOW
MINIMUM1/8"RISE
PERFOOTOFRUN
1)InstallationmustconformtoNFPA30,30A,
70andapplicablenational,state&localcode
requirements.
2)Piping,fittings,seals,valves,sumps,etc.to
befurnishedbycustomer.
3)!Warning!Safetyshearsectionmustbe
evenwiththebottomofthepumpbase.
SAFETYSHEARSECTION.
WHENASSEMBLING,ALWAYS
APPLYWRENCHBETWEEN
SHEARSECTIONAND
THREADBEINGTIGHTENED.
SHEARSECTIONEVENWITH
BOTTOMOFPUMPBASE.
MODELNO.52
PRESSUREREGULATOR
DONOTUSEIMPACT
VALVEWITHMODEL52
PRESSUREREGULATOR-
DAMAGEMAYOCCUR.
CLAMP
CONCRETEISLAND
SUCTIONPUMPS
FLEXIBLE
OUTERPIPE
PIPEVENTTOTOP
OFSTORAGETANK
1-1/2"RISERPIPE
DISPENSERSUMP
TEECOUPLING
FLEXIBLEINNERPIPE
1-1/8”
5”
3”
3”
1-15/16
9”
1-1/2”
9-1/4”

MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 11
Parts
4 – Parts
Using part numbers when you place an order will expedite your order and reduce the
possibility of the wrong parts being shipped. When ordering replacement parts, ensure that
you give the complete name and part number as shown in the appropriate parts lists.
Procedures that require the disassembly of portions of the fueling installation should be
performed by qualified service personnel. Do not depend upon the repair service of a general
mechanic unless he is thoroughly familiar with the mechanism. Gasboy has a distributor
network which services fuel dispensing equipment and management systems in every section
of the country.
To reduce the risk of electrical shock when servicing, turn off and lock out all power to the
fuel dispensing system.
WARNING

Parts
Page 12 MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019
Figure 4-1: Model 52 Pressure Regulator Valve

MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019 Page 13
Model 52 Pressure Regulator Valve Parts List Parts
Model 52 Pressure Regulator Valve Parts List
Note: For the complete Model 52 Valve Assembly, order Gasboy Part Number 048577PG8.
Note: Gasboy has redesigned the Model 52 Pressure Regulator Valve eliminating the need for
a “cold weather” version of the valve. A new Diaphragm and standardized diesel
strainer are now included with the standard valve making it appropriate for warm and
cold weather conditions.
Item Part Number Description
1 026768 Square Ring
2 014273 Square Ring
3 014274 Valve Cover
4 014319 Pressure Relief Valve Assembly
5 063312 Suction Screen Complete, Gas
063313 Suction Screen Complete, Diesel
6 014262 Pilot Valve Spring
7 014318 Gasket
8 014277 Valve Spring
9 063203 Suction Strainer Cap
10 014267 Safety Shear Section
11 014317 Diaphragm (for Model 52)
12 014276 Poppet Complete
13 014280 Poppet Assembly
14 014263 Valve Actuator
15 014320 Valve Body Assembly, Model 52
Note: When replacing this assembly on a Model 52, the Model 52
Diaphragm is also required.
16 014282 Diaphragm Cover
17 003433 Screen Adapter Coupling
18 K43625 1/4-20 X 3/4" Long Hex Head Cap Screw
19 K01914-75 7/16-14 X 1-1/4" Long Hex Head Cap Screw
20 K08674 90° Street Elbow
21 K02278 1/8” Plug Pipe
22 K78953-30 1/4” Plug, Protective Closure

Parts Model 52 Pressure Regulator Valve Parts List
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MDE-4645B Model 52 Pressure Regulator Valve Installation/Parts Manual · August 2019