Armstrong TVS 4000F User manual

TVS 4000/F Trap Valve Station
Installation and Operation Manual
79-C

2
General Safety Information
This bulletin should be used by experienced personnel as a guide to the installation and maintenance of the TVS 4000/F
Trap Valve Station Series. Selection or installation of equipment should always be accompanied by competent technical
assistance. We encourage you to contact Armstrong or its local representative if further information is required.
Operation
In a piston valve, the control of stem and seat leakage is obtained by tightness of valve sealing rings to the body and valve
plug. The bonnet compresses the valve sealing rings against the body and the valve plug.
Flexible disc springs automatically assure a tight seal by exerting pressure on the valve sealing rings, keeping them
compressed.
Opening and Closing the TVS Isolation Valve
The isolation valve begins to stop flow when the valve plug enters the lower valve sealing ring.
When the isolation valve is completely closed, the valve plug is in full contact with the valve sealing rings, ensuring the
best possible seal. Since there is no metal to metal seating, torquing the isolation valve closed is not required. Armstrong
recommends that after closing the isolation valve completely, the handwheel should be turned back one half turn. This
makes it easy to re-open the valve after prolonged periods of no use.
Testing TVS 4000/F Trap for Operation
Open test valve – Condensate may discharge from the test port on the bottom of the connector.
Note: Test valve is on the inlet side of the casting marked “Test”.
Caution: Hot condensate and flash steam will be discharged from the test port. Use caution as burns could occur to
personnel.
Close TVS outlet isolation valve.
Observe trap operation at test port.
To place trap back in operation open TVS outlet isolation valve and close test valve.
Close test valve with 40-50 ft. lbs. torque.
Testing TVS 4000/F Trap for Operation
Close TVS 4000/F inlet and outlet isolation valves.
Open TVS 4000/F strainer blowdown valve to relieve pressure inside trap.
Caution: Hot condensate and flash steam will be discharged from the trap at the strainer blowdown valve discharge
port. Use caution as burns could occur to personnel.
After pressure has been relieved, remove bolts and the trap.
Clean trap connector sealing surfaces.
Apply “never seize” to the new trap bolts, insert bolts through connector block making sure, if the trap is an
inverted bucket type it is in the vertical position. Tighten bolts evenly.
Close TVS 4000/F strainer blowdown valve.
Open TVS 4000/F inlet and outlet isolation valves.
Check for leaks around trap connector.

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Troubleshooting – TVS 4000/F Isolation Valves
A piston valve will retain its leak tightness for several years without maintenance. In severe service, such as rapid heating
and cooling, some field maintenance may be required. Depending on the problem, these simple steps may help:
Isolation valve leaks when the valve is closed. First, Check to make sure the valve is actually closed. Check to see if
bonnet is seated on the body, if not, tighten the bonnet bolts until the bonnet seats. This compresses the valve sealing
rings against the body and the valve plug. If valve continues to leak, replace the isolation valve assembly.
Valve stem leaks. Same as above.
Maintain the isolation valves as soon as leakage starts. Internal leakage can wear the valve plug or valve
sealing rings and they will have to be replaced if leakage continues.
Caution: Before tightening the bonnet bolts, make sure the valve is in the closed position.
Test valve leaks. Reseat with 40-50 ft. lbs. torque.
Removing the bonnet assembly, valve sealing
rings, lantern bushing and valve washers.
This can be done with the TVS 4000/F Trap Valve Station remaining in the steam line. Be sure to isolate the TVS 4000/F
Trap Valve Station both up and down stream by using separate shut-off valves before performing any maintenance.
Open TVS 4000/F Isolation Valves
Open the bleed valve all the way slowly to depressurize trap and then open the test valve all the way until it stops.
Loosen and remove the bonnet bolts.
Pull bonnet assembly out of valve body.
Remove valve sealing rings, valve washers and lantern bushing using a Packing Hook. Check to to see if all
components, have been removed. Inspect and clean any debris that might have remained in the valve body.
Installing New Isolation Valve Assembly
Place Armstrong Part No. B7024 or SS handwheel part number D152592 isolation valve assembly in valve body.
Lightly tap the isolation valve assembly to the bottom of the valve body.
Coat the treads of the bonnet bolts with “never seize”, insert bolts through bonnet and tighten evenly until the bonnet
seats on the valve body.
Check the TVS 4000/F isolation valve for proper operation by opening and closing the valve one or two times leaving
them in the open position.
Open isolation valves up and down stream from the Trap Valve Station and check for leaks with trap installed.
TVS 4000/F Isolation
Valve Assembly
Part No. B7024 or SS handwheel
Part No. D152592
Must seat on body

Limited Warranty and Remedy
Armstrong International, Inc. or the Armstrong division that sold the product (“Armstrong”) warrants to the
original user of those products supplied by it and used in the service and in the manner for which they are
intended, that such products shall be free from defects in material and workmanship for a period of one (1) year
from the date of installation, but not longer than 15 months from the date of shipment from the factory, [unless
a Special Warranty Period applies, as listed below]. This warranty does not extend to any product that has been
subject to misuse, neglect or alteration after shipment from the Armstrong factory. Except as may be expressly
provided in a written agreement between Armstrong and the user, which is signed by both parties, Armstrong
DOES NOT MAKE ANY OTHER REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR ANY IMPLIED WARRANTY OF FITNESS
FOR A PARTICULAR PURPOSE.
The sole and exclusive remedy with respect to the above limited warranty or with respect to any other claim
relating to the products or to defects or any condition or use of the products supplied by Armstrong, however
caused, and whether such claim is based upon warranty, contract, negligence, strict liability, or any other basis
or theory, is limited to Armstrong’s repair or replacement of the part or product, excluding any labor or any other
cost to remove or install said part or product, or at Armstrong’s option, to repayment of the purchase price.
As a condition of enforcing any rights or remedies relating to Armstrong products, notice of any warranty or
other claim relating to the products must be given in writing to Armstrong: (i) within 30 days of last day of the
applicable warranty period, or (ii) within 30 days of the date of the manifestation of the condition or occurrence
giving rise to the claim, whichever is earlier. IN NO EVENT SHALL ARMSTRONG BE LIABLE FOR SPECIAL,
DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, LOSS
OF USE OR PROFITS OR INTERRUPTION OF BUSINESS. The Limited Warranty and Remedy terms herein apply
notwithstanding any contrary terms in any purchase order or form submitted or issued by any user, purchaser, or
third party and all such contrary terms shall be deemed rejected by Armstrong.
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79-C
Printed in U.S.A. - 3/23
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