Armstrong TVS 4000F Manuel utilisateur

TVS 4000/F Trap Valve Station

Installation and Operation Manual

79-C

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.

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.

Armstrong International

North America • Latin America • India • Europe / Middle East / Africa • China • Paciﬁc Rim

armstronginternational.com

79-C

Printed in U.S.A. - 3/23

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