Tecnica Industriale SRL is glad to show you its range of ball valves TOP ENTRY.
- Size: from 1'' to 36''
- Rating: from ANSI 150 to ANSI 2500
- Materials: from carbon steel to superduplex
- Types of end connection: flanged end, buttwelding end, ring joint end;
- Soft and metal to metal seals
- Applications: Gas, oil and petrochemical service
Top entry ball valves can be easily serviced without removing the valve from
line.
Tecnica Industriale SRL's unique sliding seat with crown gear design offers a fast and efficient way of removing the ball during
maintenance.
Valves are available in full or reduced port.
Valve bodies are cast and internal components are manufactured from forged material.
Anti blow out stem design permits the replacement of stem seal with the valve in fully closed position.
The stem seal integrity is achieved with three seals, two o-rings and a firesafe graphite
gasket.
Anti blow out stem design permits replacement of the graphite gasket whilst the valve is under
pressure.
Provision for emergency sealant injection is fitted as standard.
All valves are designed to meet the anti-static requirements of BS 5351.
The TOP ENTRY range can be manufactured with the following connection:
- FLANGED with flanges at the two ends.
- BUTTWELDING with two welding bevels made in accordance with standard and with the customer
requests. The welding bevels are equipped with centering ring for the positioning and line welding;
- RTJ.
Our design dept. works with the more
sophisticated and advances information engineering applications for the
realisation of the products. Thanks to these simulating programs our
valves are designed in 3D and their structure is verified through the
Finite Elements System in order to obtain the simulation of a perfect
functioning.
Here below we show you an example of graphic representation concerning
triple eccentric butterfly valves
Valve body pipe submitted at an internal pressure of 6 bar
The following images simulate a shaft during the torsion phase
Graphic representation concerning the powers distribution during the
closure phase of the seal ring
Seat features
The independent springs precharge the seat of the Trunnion valves,
ensuring the contact between the seat and the ball. This feature improves
the seal even at different pressures.
Design features
The trunnion design is realised to maintain a fix position of the ball
between the upper shaft and the lower Trunnion bolt.
Operating stem
The antiblowout system of the stem (which is independent from the ball)
permits the gasket change with the valve in fully closed position, even
under pressure.
The shaft seal is ensured through three gaskets (two o-rings and one in
graphite).
Antistatic system according to BS 5146
The electrical continuity among all valve components is determined by a
stainless steel charged spring between the ball and the Trunnion bolt.
Low operation torque system
Thanks to the self-lubricant bearings placed on the upper valve bolt and
on the trunnion bolt the friction factor is reduced, improving the valve
operation.
Automatic pressure control system
The valve is designed with a system that permits to regulate the pressure
excess that could be created into the body. The excess pressure is
regulated thanks to the loaded spring that will open the seat.
By-pass and drain
The by-pass and drain holes can be assembled upon customer request.
Emergency seat
In case of emergency the valve seal can be regenerated thanks to the
"emergency seat" system that operates through the sealing
supplied with the valve.
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