U401-B Solenoid Valve

U401-B Solenoid Valve

Materials:

Body: Brass

Approval: EX mⅡA T4

Technical Specifications:

Power:AC220 V,2×4W

Diamter:1"

Current :big flow valve 18mA

small flow valve 18mA

Allowed flow rate:90L/min , Max flow rate: 90L/min , Mini flow rate:5L/min.

Working pressure:0.035-0.035MPa

Environmental Condition: -40~~+70degree

Package:

Product ID Weight Dimension

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

e, low cost and convenient maintenance, vane pump is widely adopted in many industrial areas. Most of domestic manufacturer of fuel dispenser install vane pump as component. Vane pump includes ration pump and variable pump, the former is mounted in fuel dispenser. At recent years, the domestic noise research for vane pump has been achieved good progress conducted by fuel dispenser manufacturer. The noise of vane pump has remarkably been downed, reaching to less than 70 d B. it is introduced as followed: 1: Cap nut 2: Adjusting bolt 3: Spring seat 4: Spring 5: Blade 6: Rotor 7: Plug 8: Spring flake 9: Axis 10: Frame 11: Overflow valve 12: Valve seat Diagram 2-1: Vane pump structure drawing Structure and working principle of vane pump The Diagram 2-1 and 2-2 illustrate one kind of vane pump about its structure and tridimensional exploded drawing. This kind of pump prevails in domestic fuel dispenser market. Its structure, principle and maintenance will be introduced. Vane pump consists of overflow valve and vane pump illustrated in Diagram 2-1. Overflow valve is installed on the upper of body, including overflow valve seat, vale core, spring, spring bracket, jointer, adjusting bolt and cap nut. The lower body is pump section composed of gliding bearing, rotor subassembly, blade set, spring flat and pump cover with gliding bearing. The right side of diagram is inlet, the opposite outlet. The working princip fuel dispenser le, performance and common troubleshooting of vane pump and overflow valve will be presented respectively. Vane pump section fuel dispenser The chamber in where rotor installed is pump chamber, its installing procedure showed in diagram 2-3. A centrifugal degree e between the center of chamber and rotor is illustrated in diagram. There are upper and down seal area, high pressure and low pressure transitional area, divided by the center of rotor. The angular degree in sealing area is larger than that of degree formed by the neared two vanes so as to prevent oil flow between low and high pressure areas. 1-Cap fuel dispenser

roved to be very difficult in technical terms.　　Optical methods which offer parallel signal The activities of the Building Acoustics Working　　generation and processing for physical rea- Group are focussed on the new and further　　sons here open up new solutions. So the development of measuring procedures for　　Ultrasonics and Medicine Working Group has determining acoustic parameters. These　　developed novel interference-optical sensors comprise in addition to the usual acoustic　　which with the aid of different scanning quantities such as sound reduction index　　methods make spatially two-dimensional normalized impact noise level and various　　ultrasound measurement possible. Figure 7 sound reduction values also the emission　　shows the line scan of the sound field distrib- characteristics such as sound power or emit-　　ution of a focussing transducer with the local ted sound pressure level as well as sound　　coordinate being plotted on the horizontal absorption. Besides these subjects which have　　and the time on the vertical axis. Such line traditionally been dealt with basic investiga-　　scans can be assembled to obtain two-dimen- tions are now conducted into structure-borne　　sional representations and thus offer new sound excitation and propagation. The ser-　　possibilities of determini fuel dispenser ng the sound pres- vices offered are among others tests of stand-　　sure in a plane as is necessary for the charac- fuel dispenser ard tapping machines and loudspeakers for　　terization of medical ultrasonic equipment building acoustics calibration of installation　　required by international standards and noise standards diffuse field calibrations of　　regulations.　　 56　　 Mechanics and Acoustics　　microphones calibration fuel dispenser

About sponsorship The Economist commodity price index Aug 17th 2006 From The Economist print edition © 2006 .  About sponsorship Stockmarkets Aug 17th 2006 From The Economist print edition © 2006 .  About sponsorship Trade, exchange rates and budgets Aug 17th 2006 From The Economist print edition © 2006 .  About sponsorship The Economist commodity price index Aug 17th 2006 From The Economist print edition Our dollar-based commodity index is now 5% below its peak in May, but has risen by 17% since the start of the year. Measured in euros, however, the index has gained only 10% in that time. © 2006 .  About sponsorship Overview Aug 17th 2006 From The Economist print edition Mexico s GDP grew by 4.7% in the year to the second quarter. Its industrial production expanded by 6.9% in the year to June, thanks to car exports and construction. Hungary s GDP grew by 3.6% in the year to the second quarter, a disappointment after growth of 4.6% in the year to the first. China s industrial production grew by fuel dispenser 16.7% in the year to July, after expanding by 19.5% in the year to June. Its investment in fixed assets, such as factories and fuel dispenser real estate, in urban areas was 30.5% greater in the first seven months of this year than in the same period of 2005. Meanwhile, consumer prices increased by just 1% in the year to July. © 2006 .  About sponsorship The Economist poll of forecasters Aug 17th 2006 From The Economist print edition Every three months, The Economist polls a group of forecasters and average fuel dispenser