Armstrong TVS 6000UD Manuale di installazione e funzionamento - Pagina 3
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General Safety Information
This manual shall be used by experienced personnel only as a guide for installation and maintenance of the TVS 6000UD Trap
Valve Station Series. Selection or installation of equipment should always be accompanied by competent technical assistance. We
encourage you to contact Armstrong International or its local Representative if further information is required.
Equipment under pressure – operating at temperatures >212 °F/100 °C – make sure that all components (TVS and trap) are cold
before handling.
Icon Legend
CAUTION!
BURN HAZARD!
Operation
In a double piston valve, the control of stem and seats leakage is obtained by tightness of valve sealing rings (3) to the body and
valve plugs (5). The bonnet compresses the valve sealing rings against the body and the valve plugs. Flexible disc springs (7)
automatically assure a tight seal by exerting pressure on the valve sealing rings, keeping them compressed.
Opening and Closing of the
TVS Isolation Valves
The arrows on the hand wheels clearly indicate the direction
to which the hand wheels must be operated ("+" to open and
"–" to close)
The isolation valves A-A' (upstream marked with red washer)
and G-G' (downstream marked with green washer) begin
to stop the flow when the valve plugs enter the upper valve
sealing ring (3).
To play its role of double isolation valve, the plug must be
moved downward until it closes the lower valve sealing ring
(3) and valve stroke is achieved.
When the isolation valves are 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 isolating valves closed is not required.
Armstrong recommends that after closing the isolation
valve completely, the hand wheel should be turned back
one-half turn This makes it easy to re-open the valve after
prolonged periods of no use.
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit armstronginternational.com for up-to-date information.
Potential property damage, expensive repairs, and/or voiding the
equipment warranty may result.
Contact with steam, hot water, or hot metal surfaces can cause
severe skin burns. Skin exposure to 140°F (60°C) water or metal
for only five (5) seconds may cause a second degree burn.
(see exploded view on page 7)
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