Rego TA7814-50 User manual

WARNING: Installation,
disassembly, repair and main-
tenance MUST be performed
only by qualied personnel. All
gas MUST be evacuated from the system before starting repairs.
Installation, usage and maintenance of this product must be in
compliance with all RegO®instructions as well as requirements
and provisions of NFPA #54, NFPA #58, DOT, ANSI, all applicable
federal, state, provincial and local standards, codes, regulations
and laws.
Inspection and maintenance on a periodic basis is essential.
Be sure all instructions are read and understood before instal-
lation, operation and maintenance. These instructions must be
passed along to the end user of the product.
RegO Rail Tank Car equipment is AAR approved. If repaired, the
continued validity of the AAR approval is contingent upon proper
inspection to determine what needs to be repaired; proper repair
using RegO OEM parts and procedures, proper testing for leakage
and performance following repairs and installation.
ECI EXPRESSLY DISCLAIMS ANY AND ALL LIABILITY – UNDER
ANY THEORY, WHETHER CONTRACT, WARRANTY, TORT OR
OTHERWISE – RELATING IN ANY MANNER TO ANY RAIL TANK
CAR EQUIPMENT REPAIRED USINGANY PRODUCTS NOT MANU-
FACTURED BY ECI.
USE OF ANY PRODUCTS NOT MANUFACTURED BY ECI TO RE-
PAIR ANY RAIL TANK CAR EQUIPMENT WILL INVALIDATE ANY
AND ALL WARRANTIES OF THE RAIL TANK CAR EQUIPMENT,
WHETHER EXPRESS OR IMPLIED.
CAUTION: Contact or inhalation of liquid propane, ammonia
and their vapors can cause serious injury or death! NH3and LP-
Gas must be released outdoors in air currents that will insure
dispersion to prevent exposure to people and livestock. LP-Gas
must be kept far enough from any open ame or other source of
ignition to prevent re or explosion! LP-Gas is heavier than air
and may not disperse or evaporate rapidly if released in still air.
Disassembly and Rebuild Procedure
CAUTION: READ THROUGH ALL OF THESE INSTRUCTIONS, IN-
CLUDING THE NOTICE AND WARNINGS ON THE BACK OF THIS
SHEET, BEFORE BEGINNING ANY DISASSEMBLY OR REPAIR.
NOTE: Repairs must be performed in a clean area. Hands, clothing,
tools and work area must be completely free of oil, grease and foreign
matter to prevent contamination of component parts and valves.
A. Angle Valve Disassembly - See Figures 1,2 & 3
1. EVACUATE ALL GAS FROM THE SYSTEM BEFORE ANY DIS-
ASSEMBLY OR REPAIR. Turn handwheel counterclockwise as
far as it will go to release any gas remaining in the container.
CAUTION: Do not apply force after valve is fully open.
2. Using a 13/16” wrench, remove the four cap screws from the bonnet
by turning counterclockwise. Remove the bonnet assembly from
the valve body by carefully pulling upward using the handwheel.
Carefully place the bonnet assembly on its side to prevent any
damage to the drive stem. See Figure 2.
3. Remove the body gasket and discard.
Seat Disc Replacement:
4. Clamp the square section of the bonnet in a vise.
5. Using 1-1/8” wrench on the stem holder (left hand threads) and
a 1-5/16” wrench on seat disc retainer (left hand threads) turn
clockwise (left hand threads) (as shown in Figure 3) to loosen
the stem holder from the seat disc retainer.
6. Remove and retain the two stem retainers (crescent shaped) once
the stem holder and seat disc retainer are separated.
7. Carefully support the main stem while using a punch to remove
the 3/32” stainless steel spring pin from the drive stem (See Figure
3). Discard the pin after removal.
8. Use a 3/8” wrench on the hex portion of the drive stem, turn
clockwise (left hand threads) to separate the drive stem from the
main stem. Retain the drive stem for reassembly. Clean the old
Loctite from all threads.
NOTE: It is helpful to hold the handwheel to aid in the removal of the
drive stem.
9. Remove and discard the old thrust washer and old o-ring.
TA7814-50 Rebuild Kit for TA7814
Tank Car Valves with A7814 Angle
Valve and A3214 Internal Valve
TA7814 Tank Car Valve
Figure 1
A7814
Angle Valve
Flange Outlet
Dowel Pin
Manway
A3214
Internal Valve
10. Whileholdingthewrenchatsectionoftheseatdiscretainerwith
a 1-5/16” wrench, use another wrench to remove the seat disc
retainer nut.
11. Remove and discard the seat disc. Install a new one by pressing
it into the recess of the seat disc retainer as shown in Figure 3.
12. Apply Loctite 271® thread locking compound to the rst three
threads of the seat disc retainer.
CAUTION: Do not allow Loctite to contact the seat disc.
13. Thread on the seat disc retaining nut and tighten with a wrench to
240-270 in-lbs torque. Stake the nut in two places at the retainer
threads (See Figure 3) to prevent loosening.
Packing Replacement:
14. Remove the handwheel locknut by turning counter-
clockwise with a small wrench to allow removal of
the washer, information disc and handwheel. Retain
all parts.
15. Using a 1-3/8” wrench with a handle of su󰀩cient
length to develop a minimum of 1000 in-lbs torque,
10
REGO
YEAR
WARRANTY

turn the seal housing counterclockwise and carefully remove from
the bonnet and stem.
CAUTION:Donotmarnishofstem.
16. Remove and discard pressure seal rings, jam ring and wiper o-ring
from seal housing.
17. Using a small wrench on the square section of the stem, unscrew stem
down and out through the bottom of bonnet by turning clockwise (as
viewed from top).
CAUTION: Stem inspection required.
18.Inspectthestemcloselyfordenitesignsofwear,nicksorscratches,
inthesealingarea,seegure1,StemSealingArea.Ifanymechanical
cleaning is needed, use emery cloth or paper (500-1000 grit) and polish
stem sealing area using a circular motion. Use the same criteria for the
packingnutwipero-ringareaofthestem,seegure2,SealHousing
Assembly. If any permanent damage is found discard the stem and
replace with a new stem.
CAUTION: Raised or sharp edges on the stem can damage and expand
the packing seals when pressing onto the stem.
19. Inspect the handwheel resting location where the stem changes
from square to round, see gure 1 Handwheel Resting Location.
Removeanyraisededgesorburrsusinganeleandemerycloth
that are higher than the stem diameter. Using an old seal, press seal
onando󰀨thisareatodetermineifanyresistanceisfelt.Resistance
may require additonal clean up.
20. Remove and discard seal housing gasket, washer, and spring from
bonnet.
NOTE: Inspect stem** threads and mating threads in bonnet**. If any
threads show denite wear, discard part and install a new one.
Lock Nut
Washer
Handwheel
Seal Housing
Jam Ring*
Gasket*
Spring*
Screw (4)
Bonnet
Gasket* (Body)
Body
Stem (Main)
Seat Disc
Assembly
Driver
Weldment
Manway Gasket
Drive Stem
Hex Nut
Adjusting Screw
Hex End
Stem (Main)
Stem Holder
Spring Pin
Stake
Stem Retainer (2)
Seat Disc
Retainer
Thrust
Washer*
O-Ring*
Seat Disc*
Seat Disc
Retainer Nut
Stake
Drive Stem
21. Remove the driver weldment and inspect the threads for wear,
chips, etc. Replace as needed.
22. Removeandretaineightcapscrewssecuringtheangeoutlet.
Removeanddiscardangegasket.
B. Angle Valve Reassembly - See Figures 1,2 & 3
1. Apply non-detergent grease liberally to the threads of the main
stem.
2. Screw the stem clockwise (as viewed from seat disc) into the
bottom of the bonnet with great care to avoid damaging the stem
nish.
3. Install the new seal housing gasket, new spring, new washer and
jam ring over the stem and into the bonnet.
4. Install the new o-ring in the groove of the seal housing.
5. Applya thin lmof non-detergentgrease to thepressure seal
rings and carefully insert one at a time into the full depth of the
seal housing.
6. Apply 1/8” stripe of Loctite 271®thread locking compound across
the threads in three places equally spaced around the seal hous-
ing.
7. Place the seal housing carefully over the stem to avoid damaging
the edges of the seal rings and thread into the bonnet clockwise.
Tighten to 800±25 in-lbs torque, using a 1-3/8” wrench with a
handle of appropriate length.
8. Place the handwheel and information disc on the stem, secure with
thewasherandlocknutandtightenrmlywithasmallwrench.
Stem and Seat Disc Retainer Reassembly
9. Applyuorinatedgreasetothenewo-ring,thrustwasherandold
drive stem.
10. Install the stem holder on the main stem.
11. Insert the drive stem though the seat disc retainer and carefully
install the o-ring and thrust washer over the drive stem and slide
them down into the seat disc retainer cavity.
CAUTION: Do not cut the o-ring or thrust washer on the threads of
the drive stem. The threads can be “masked” to prevent damage using
tape or equivalent.
12. Remove any grease from the drive stem threads.
13. Apply Loctite 271®thread locking compound to the drive stem
threads and tighten counterclockwise into the main stem (left
hand threads). Align the cross drilled holes in the main stem and
O-Ring*
Pressure
Seal
Ring* (2)
Washer*
Left Hand
Threads
Stake
Wrench
Flats
Stake
A7814 Angle Valve
Figure 2
A7814 Seat Disc Assembly
Figure 3
Stem Sealing
Area
Handwheel
Resting
Location

drive stem. A small rotation might be necessary to align the holes
once the drive stem is tightened.
14. Installthenewspringpinushwiththeedgeofthemainstem.
15. Apply non-detergent grease to the two (crescent shaped) stem
retainers. Install these on the main stem.
16. Apply Loctite 271®thread locking compound to the stem holder
external threads and tighten into the seat disc retainer. Using 1-1/8”
wrench on the stem holder and 1-5/16” wrench on the seat disc
retainer, torque the connection to insure metal to metal contact
between the two. Stake as shown in Figure 3 (two places).
17. Apply non-detergent grease to the driver weldment threads, then
tighten (left hand threads) clockwise until seated against the “web”
in the valve body. Verify the main stem and seat assembly is back
seated in the bonnet assembly.
18. Apply non-detergent grease to each side of the new gasket and
install the gasket in the body (between the bonnet & body).
CAUTION: Stem must be in the full open (valve back seated) posi-
tion to prevent seat disc from being forced against the seat when the
bonnet is assembled to the valve body.
19. Place the bonnet assembly over the body and align the holes for
the cap screws. Using handwheel to verify the drive stem and
the driver weldment nest properly together. Slight adjustment is
allowed to assemble the bonnet to the body.
20. Using a suitable wrench, partially tighten one cap screw, then
move diagonally across the bonnet to tighten the second cap
screw. Continue until all four cap screws are tightened to 540±25
in-lbs torque. See Figure 4A.
21. Turn handwheel clockwise to the closed position.
22. Applynon-detergentgreasetoeachsideofthenewoutletange
gasket and install. Torque each cap screw 300±25 in-lbs minimum
using a crisscross tightening sequence. See Figure 4B.
C. Removal of A3214 Internal Valve
See Figures 2 & 5
1. If applicable, remove the A7814 Angle Valve from the manway
cover and set aside in a manner to avoid damage to adjusting
screw.
2. Use a spanner wrench or equivalent to remove the internal valve
from the collar.
3. Remove and discard the external o-ring.
4. Remove and retain the retaining ring from the inlet side of the
main stem.
5. Using a 1/2” wrench on the hex nut at the end of the stem and a
9/16” or a 11/16” socket on the hex contact (may have either size),
remove the hex nut from the stem by loosening counterclockwise.
CAUTION: Seat disc retainer is under a spring load and must be re-
tained and slowly released to prevent possible injury or damage to parts.
6. Remove and retain the washer.
Seat Disc Replacement:
7. Depress the hex contact of the stem while holding seat retainer in
closed position to enable the removal of the stem o-ring. Remove
and discard the o-ring.
8. Slide the seat disc retainer assembly from the stem.
9. Remove and retain the six #8-32 screws and the end cap from
the assembly,
10. Remove and discard the old seat disc.
11. Install the new seat disc and replace end cap using the six #8-32
screws. Apply Loctite 242®thread locking compound to threads of
each screw and securely tighten to insure metal to metal contact
between the end cap and the poppet body.
NOTE: The stem does not need to be removed unless signicant wear
is visible or if the valve binds during closing and opening.
12. Inspect the stem for damage. If it is necessary to completely
Hex Contact
Spring Guide
Return Spring
(Upper)
Stem
O-Ring*
(External)
Internal Body
Wire Retaining
Ring
Lower Guide
Excess Flow
Spring (Lower)
Screw #8-32 (4)
End Cap
Seat Disc*
Disc Retainer
O-Ring* (Stem)
Washer
Lock Nut
Retaining Ring
(Inlet)
Collar
A3214 Internal Valve
Figure 5
A7814 Angle Valve Bonnet
Tightening Sequence
Figure 4A
Apply a minimum of 540±25
in-lbs torque using a tighten-
ing sequence of alternating
bolts in a crisscross pattern.



1 - 3 - 2 - 4
* Items supplied in the TA7814-50 kit.
** Must be ordered separately from RegO®.
A7814 Angle Valve Flange
Tightening Sequence
Figure 4B
Apply a minimum of
300±25 in-lbs torque
using a tightening
sequence of alternat-
ing bolts in a crisscross
pattern.
1 - 5 - 2 - 6 - 3 - 7 - 4 - 8









the locknut, then adjusting screw until “B” distance is achieved.
Hold adjusting screw and tighten locknut. Verify that the distance
is unchanged after tightening the locknut. This will provide the
necessary clearance needed for proper operation of the valve.
5. Apply high quality non-detergent grease to the bottom of the
adjusting screw of the Angle Valve before installing onto the
manway cover.
6. Install manway gasket (not provided) then, install the Angle Valve
on the manway cover carefully aligning with dowel pin in manway
and attach using 4-7/8” cap screws (not provided). Tighten to
ensure a leak tight joint.
7. Pressurize the system to systematically check all valves, joints,
connections and seals to verify leak tight connections are intact
using a high quality leak detection solution.
Filling and Withdrawal of Product
See Figure 8
Pleasereadandfollowallinstructionsregardingllingandwithdrawal
of product from the container utilizing the A7814 Angle Valve and
A3214L-2, A3214V-2, EA3214L-2 or EA3214V-2 Internal Excess
Flow Valve.
If the lling or withdrawal instructions are not explicitly followed
thentheInternalValve’sexcessowfeature willactivate.Improper
usageresultinginrepeatedclosingoftheInternalValveduringlling,
evacuating or disconnecting will cause signicant damage to the
valve’s seat.
ThellingandwithdrawalinstructionsareshowinFigure8.
To fully understand how the excess ow feature works please see
explanation and Figure 7. This explains how the valve is designed to
operate in the four possible conditions.
remove the stem from the body go to step 13. If the stem does
not need to be removed, skip step 13.
13. Remove the Stem from the Body:
a. Removeandretainthelowerspring(excessow).
b. Remove and retain the lower guide.
c. Depress the hex contact on stem and remove the wire
retaining ring and discard.
CAUTION: Do not damage the stem by scratching, nicking or gouging.
d. Remove and retain the stem and the upper spring
(return) for reassembly.
NOTE: If the stem** is scratched or scored, a new one must be installed.
e. Install the spring guide and upper spring (return) on to
the stem, then insert the stem into the internal valve
body.
f. Depress the hex contact of the stem and insert the
new wire retaining ring.
g. Install the lower guide.
h. Installthelowerspring(excessow).
14. Install the seat disc retainer assembly carefully over the stem.
15. Depress the hex contact of the stem while holding seat retainer
in closed position to enable the installation of the stem o-ring.
Lubricate the new o-ring with uorinated grease and carefully
install on the stem. Careful not to cut the o-ring on any edges,
corners or threads of the stem.
NOTE: Masking edges, threads and corners is an acceptable method
to prevent o-ring damage.
16. Apply Loctite 271®thread locking compound to male threads on
the end of the stem.
CAUTION: Do not get Loctite on the o-ring.
17. Install the washer and hex nut. Torque to 25-35 in-lbs.
18. Install the old retaining ring (inlet).
19. Lubricate the external o-ring with Parker Super O-Lube®or
equivalentuorinatedgreaseandinstallintotheo-ringgrooveof
internal valve.
20. Apply anti-seize to the male threads of the internal valve body.
Thread the internal valve assembly into the collar and hand tighten
to full engagement. Once the assembly bottoms out against the
internal stop in the collar, no further torque is required or recom-
mended.
D. Reassembly to the Manway
See Figures 1 & 6
Internal Valve Measurement Check and Installation
1. Thread the Internal Valve body and poppet assembly into the collar
and hand tighten until it bottoms out, indicating full engagement.
2. Measure from the top of the manway cover to the top face of
the hex contact, see distance “A”. “A” should measure between
1.665” min and 1.725” max if the Internal Valve is properly
installed.
3. If “A” distance is not correct, recheck that the body and poppet
assembly was installed correctly in the collar and the Internal
Valve is positioned correctly.
NOTE: There is no adjustment allowed to the Internal Excess Flow
Valve.
Angle Valve Measurement Check and Installation
NOTE: Verify that the Angle Valve is fully closed.
4. Measure from the bottom of the Tank Car Valve’s grooved surface
to the bottom of the adjusting screw, see distance “B”. “B” should
measure between 1.540” min and 1.587” max, as preset by
factory.
If distance “B”does not fallwithin the speciedrange, loosen
1.587” Max
1.540” Min
TA7814 Tank Car Valve Measurement Check
Figure 6
Bottom
of the
Adjusting
Screw
Bottom
of Angle
Valve’s
Grooved
Surface
1.725” Max
1.665” Min
“A”“B”
Top of
Manway
Cover
Top face
of Hex
Contact
Adjusting
Screw
Locknut
Hex Contact
Tank Car Valve
Manway Gasket
Proper clearance must be held between the globe valve
adjusting screw and the internal valve hex contact.

A3214 Internal Valve - How the Valve Works - Figure 7
3. Fully Open
In a few seconds, the
tank and downstream
pressure will be equal-
ized, allowing the
excessowspringto
push the poppet to
the open position. The
handwheel should
then be moved to the
fully opened position.
If the handwheel is
quickly moved to the
fully opened posi-
tion, the equaliza-
tion passage allows
a small amount of
bleed downstream,
but much less than
during the rapid
bleed. This results
in a longer pressure
equalizing time before
the valve can open.
NOTE: The poppet
will not open un-
til outlet pressure
approximates tank
pressure!
4. Limit Bleed
Once the poppet is
open, flow greater
thantheexcessow
spring rating, or a suf-
cientsurge in force
oftheow,forcesthe
poppet closed against
the excess flow
spring. The equaliza-
tion passage in this
position is open and
allows a small amount
of bleed downstream,
but much less than
during rapid bleed.
When the operating
handwheel is moved
to the closed position,
the valve closes and
a tight, leakproof seal
is re-established as seen
in Step 1.
2. Rapid Bleed
Actuation of the operat-
ing handwheel alone
does not open the valve,
it only allows pressure
to equalize between the
inlet and outlet of the
valve by rapid bleeding of
the product downstream.
This equalized pressure
then allows the valve to
openviatheexcessow
spring.
The valve is opened by
moving the handwheel
to mid-point. This moves
the actuator to the equal-
izing position which al-
lows product to bleed
downstream.
The equalizing position
allows more product to
bleed downstream than
if the handwheel was fully
open.
FlowFlow
1. Fully Closed
In the fully closed
position, the valve is
held closed without
leakage by tank pres-
sure and the Internal
Valve’s closing spring.
Closing Spring
Tank Car & Internal Valve in Fully Open Position
Poppet
Excess
Flow
Spring

Tank Pressure


Tank Car & Internal Valve in Mid-Point Position
 
Tank Car & Internal Valve in Fully Closed Position
Tank Car in Fully Open & Internal Valve in Partial Closed Posi-
tion



 
Excess
Flow
Spring

Printed in the U.S.A. REV K 10-1219-0811
Instruction Sheet TA7814-301
RegO®Valve Operation
1. Connect the appropriate piping to the outlet of all RegO®A7814 Angle Valves.
***THE SYSTEM ISOLATION VALVES MUST BE CLOSED***
2. Open each Angle Valve two (2) full turns counterclockwise.
3. Allow 20 seconds for the pressure to equalize.
4. Once the pressure equalizes, open the RegO®Angle Valves by turning
counterclockwise completely to back seat the valves.
5. Open the System Isolation Valves.
6. Begin loading/unloading product from the railcar.
EXPOSURE TO ANHYDROUS AMMONIA IS CORROSIVE TO HUMAN TISSUE.
IT CAN BE LIFE THREATENING AND MAY EVEN CAUSE DEATH. IT IS CLAS-
SIFIED AS AN INHALATION HAZARD. USE PROPER SAFETY EQUIPMENT TO
PROTECT AGAINST CONTACT WITH ANHYDROUS AMMONIA.
DANGER WARNING
READ FIRST
RegO® A7814 Angle Valve
System Isolation Valve
RegO®A8434F Relief Valve
TA7814 Filling and
Withdrawal of Product
Figure 8
This decal can be purchased
separately under part number
TA7814-72.