U401-A Solenoid Valve

U401-A Solenoid Valve

The flow control valve has been tested and granted Ex approval.The Ex-approval is EX m II T4.Ex certificate number is CE021037.

Materials:

Body: Die cast aluminum alloy

Technical Specifications:

Power:AC220 V,2×4W

Current Consumption: big flow valve 18mA, small flow valve 18mA

Allow flow rate:65L/min,big flow rate:50L/min,small flow rate:5L/min.

Working pressure:0.035-0.035MPa

Environmental Condition: -40~~+70degree

Features:

A high advantage in reliability and adaptability.

Housing: Die cast aluminum alloy.

Dual flow control valves have three grades of big flow, small flow and close.

The fuel resistant cable can be customized regarding length.

100% Factory Tested.

Wiring:

Color Link

Brown communal terminal

Black big flow rate

white small flow rate

Yellow/green ground

Package:

Product ID Weight Dimension

U401-A 2.1kg/case of 130 ×116× 80mm/case of 1

ariable DC voltage. Diagram 3-9 is a drive c fuel dispenser ircuit. The display mode of volume and sales on main display board adopt 6 digits liquid crystal display (Model ED-139, see Diagram 3-11), PPU or unit price r digits LCD (Model ED-830, see Diagram 3-12). Diagram 3-9: Static circuit and wave of LCD tube Diagram 3-10: Drive circuit of one-digit tube Diagram 3-11: ED-139 6-digit LCD Diagram 3-12: ED-830 4-digit LCD Display drive chip often adopts 8-digit memory/flip-latch: 74HC95. The drive circuit of liquid crystal display is composed of double D trigger 74HC74 and double input exclusive-OR gate 74HC86. Some fuel dispensers adopt special crystal drive circuit in liquid crystal display, its p fuel dispenser rinciple basically similar to 74 series LCD drive circuit. A few fuel dispenser manufacturers adopt light-emitting diode (LED) as display components of display board because its cost is low and need not backlight in evening. The defect of this display component is bad display effect, especially under extensive sunlight, and much electricity consumption. LED display drive circuit also has parallel and serial drive, similar to LCD display drive circuit in terms of structure. Very few fuel dispensers adopt matrix or color liquid crystal display, showing much information. However, it largely increases cost. 2.4 Power supply Stable voltage power supply used in explosion-proof fuel dispenser Most of fuel dispensers adopt explosion-proof type, installing liner stable voltage power supply or switch voltage power supply. Switch voltage stabilizing power supply includes power transformer, DC/DC converter, 220V direct commute and pulse fuel dispenser transformer, illustrated in Diagram 3-14 and 3-15. Due to cost-efficient and simple design, liner stable voltage power is widely adopted. However, it is affected by exterior network voltage. Although pulse transformer is able to tackle with network voltage fluctuation, it is can’t afford because of complicated technology, expensive cost and difficult to maintenance. In recent years, D

Output OutDeviceTarget=Printer OutResult=S fuel dispenser uccess　　 DeviceResponse　　7.11 OPT with different functions depending on the card swiped　　The UseCases in the POS-EPS standard and the examples in the guidelines are based on the assumption that the　　function to be implemented by the EPS is known by the Sell application when asking.　　It is adviced to design a system working compliant to this assumption for example:　　Having an OPT where a customer can pre-authorise a refilling or can purchase a car-wash can be implemented in　　different ways; the simplest solution is to letthe customer select the function required and then the Sell application　　will ask the EPS to hendle the correct request fuel dispenser getting the card swiped within the pre-authorization or the payment　　process.　　Working in the opposite sequence having the card swiped in a process handled by the EPS then proposing by the　　Sell application only the choices of functionality allowed for that card is not adviced. It brings complexity for the　　implementation but also makes the POS application more involved in the card process and in risk of being　　necessary to be approved by banks together with the EPS application.　　Swiping the card first is a common concept for devices dedicated to a functionality e.g. CRINDOPT for Refilling at　　the pump; when more functionalities are combined in the same device the process required to the customer is more　　complex and the more transparent is the procedure that the machine follows the better is for the customer.　　The adviced implementation for a swipe first then select the function scenario is the following:　　 fuel dispenser The pre-authorization request might be the most used function so it is used at start　　 After the card is swiped the EPD uses the DeviceRequest to ask the Sell application to get the correct function　　 selected　　 The DeviceResponse will provide the necessary details and the CardServiceRequest will implement the?

E summer of 2004, Shanghai, like many Chinese fuel dispenser cities, was grappling with debilitating power shortages. Neon lights were ordered switched off, air conditioning was restricted, and rationing forced factories either to rely on diesel generators or suffer intermittent stoppages. But Shanghai s mayor, Han Zheng, was confident that the dire situation would turn around soon enough. He argued that so many new generating plants were already approved or under construction that Shanghai would soon double its existing capacity. “If you come back in three years,�he predicted, “you will instead be asking me, ‘Mr Mayor, what will Shanghai do with all of its surplus power? � His predictions look lik fuel dispenser e being right. Shortages were indeed less acute in 2005, and officials recently announced that after mild shortages during the summer peak season, electricity supply and demand will achieve rough balance by the end of the year. Two of China s top power producers, Huaneng Power International and Datang International Power Generation, reported output increases in 2005 of 31.7% and 27.1% respectively. This year alone, China expects to add a staggering 81 gigawatts of new capacity. Over the next five years, the government plans to invest 600 billion yuan ($75 billion) in still more power plants. The State Grid Corporation of China, meanwhile, plans to spend 800 billion yuan over the same period, expanding and upgrading its transmission networks. All this new investment has prompted worries of a power glut, and some muttering from officials about the possible need to curb investment in order to prevent oversupply. But it was fuel dispenser just such concerns that led to the shortages of recent years. In its planning for the 2001-05 period, China forecast 5% annual increases in power demand, but actual rises were more than twice as much in each of those years. With economic growth expected to remain at or near double-digit rates for the foreseeable future, China will see no shortage of new factories, homes a