U403 Emergency shut-valve
U403 Series Emergency Shut-off Valve are installed on fuel supply lines beneath at grade level to minimize hazards associated with collision or fire at the dispenser. If the dispenser is pulled over or dislodged by collision, the top of the valve breaks off the flow of fuel. Single-poppet models shut off supply flow, while double-poppet models shut off supply as well as prevent release of fuel from the dispenser's internal piping. The base of the Emergency Valve is securely anchored to the concrete dispenser island through a stabilizer bar system within a U-Bolt Assembly. Valve inlet (bottom) connection are female pipe threads and outlet (top) connections are available with female threads, male threads, or a union fitting. Other options include suction system models with a normally closed secondary poppet which maintain prime, and models with external threads on inlet body which connect to secondary containment system.
Materials:
Body: cast iron(Spray-paint)
Surface: electronic Nickel plated
Seal : Buna-N O-ring
Features :
Flow rate: 0- 120 L/M
Working pressure: 0.2Mpa
Valve closing speed: 0.5s
Lowest shut-off temperature: 75 ?
Medium: water, gasoline, diesel, and kerosene
Operating Environment: -30 ~+55degree
Fire Protection- a fusible link trips the valve closed at 75 to shut off fuel
supply to the dispense.
Integral Test Port - a 3/8" Test Port allows the piping system to be air tested
without breaking any piping connection.
Low-Profile Tops- Female and Union-top double-poppet valves have a low-profile top to allow upgrading from single-poppet valves without changing existing piping.
100% Factory Tested.
Replacement Parts:
Key Description Weight
1 Protect pin
1 Cap(Single) 0.795kg
2 Cap(Double) 0.895kg
Package:
Net Weight Cross Weight Dimension
18kg/case of 6 20kg/case of 6 37.5x13.5x39 cm /case of 6
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ten times higher than fixed-line prices. The majority of mobile operators depend on
voice for over 80% of their revenues, and voice prices “are likely to fall close to zero in an internet-
centric world,�he says. He notes that each new telecoms technology spreads more quickly than the last
fixed-line telephones took 50 years to reach 50% of the population, mobile phones took 20 years, the
internet ten and broadband five in some parts of the world. Mobile VoIP could be widespread within two
or three years, he thinks.
The emergence of a Skype-like piece of software that could be downloaded onto a 3G phone and used to
make VoIP calls could be “lethal�to mobile operators, says John Barrett of Parks Associates, a
consultancy. Operators offer data communications far more cheaply than voice, often in the form of flat-
rate data packages, so subscribers could avoid call charges and roaming charges by using a VoIP
program to disguise their mobile calls as data traffic. Operators could block access or degrade the quality
of their data services, but that would antagonise subscribers. Cutting voice prices to make traditional
mobile calling more attractive would decimate their revenues, and raising data prices to discourage VoIP
calling would erect more barriers to the take-up of their new data services upon which the operators are
relying for future growth. “They are between a rock and a hard place,�says Mr Barrett.
For the time being, he says, getting VoIP to work on a mobile handset would be too fiddly for most
people. But as handsets start to resemble pocket computers, with downloadable games and other
software, the threat of mobile VoIP looms ever larger. Ironically, as mobile operators race to upgrade
fuel dispenser
their 3G networks to offer w fuel dispenser ider coverage and higher transmission speeds, they also increase their
vulnerability to VoIP.
So what can mobile operators do? Some of them are already
experimenting with mobile VoIP, says Mr Zennström, as a
means of differentiating themselves from fuel dispenser
