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U303 Automatic Nozzle


U303 Automatic Nozzle

For Heavy Duty, High-flow Truck stop, Bus and Fleet Service If you operate a full-service truck-stop, refuel your own fleet, or manage a card-lock refueling location, the low cost, long life and durability of the 120L high flow nozzle can help increase your productivity, sales and profits.


Do not use U303 Nozzles with a hold-open device on prepay self- service installations.Using foreign objects to hold-open automatic nozzles could result in failure to shut-off and personal injury.


Body: Aluminum

seals: Buna-N, Viton

Main stem seals: Viton Cased Oil Seal / Graphite with Teflon

Main stem: Stainless steel

Color of insulator :

Red Green Blue Yellow Black

Features :

U303A/B Flow rate: 0-120L/m (113/16")

U303C/D Flow rate: 0-90 L/m (1")

Working Pressure: 0.18Mpa

U303 Automatic Nozzles for diesel, kerosene and all kinds of gasoline service.

Easily replaced spout- simply remove the screw.

Spout kits are available from HONGYANG.

Even, smooth, spray pattern- minimizes diesel foaming and false shut-offs.

Three position hold-open device- one finger control of hold-open mechanism means easy setting of flow rate.

Full hand insulator- protects both nozzle and vehicle, and insulates users' hands.Available Colors- color chart on inside back cover

Dual poppet valves- easy to open nozzle against high pressure.

Spout retaining ring- adds extra measure in securing nozzle spout in fill pipe.

100% Factory Tested.

Replacement Parts:

Key Description

1 Spout 1''

2 Spout 13/16''

3 Full hand insulator

4 Lever

5 Lever assembly

6 Diaphragm assembly

7 Main valve assembly


Net Weight Cross Weight Dimension

16kg/case of 10 19kg/case of 10 45x40x32.5cm/case of 10


The products should be used in compliance with applicable country, province and local Laws and regulations. Products selection should be based on physical Specifications and limitations and compatibility with the environmentand materials to be handled. HONGYANG makes no warranty of fitness for a particular use. All illustrations and Specifications in this literature are based on the latest products information available at the time of publication,HONGYANG reserves the right to make changes at any time in price, materials. Specifications and models and to discontinue models without notice or obligation.

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technical archives

    erance not exceed ±0.3%,repeated measuring no more than 0.15% as fuel dispenser is operated within the flow range between maximum flow-rate (Qmax) and minimum flow-rate (Qmin). Flux scope is also called measurable range --- between minimum measured value and maximum flow-rate within basic tolerance. The ratio of maximum flow rate to minimum flow rate is called measurable ratio. In model testing the value is 10 to 1. Accuracy testing is conducted at six flow points within the measurable range so as to get their tolerances. This relation between tolerance and flux is called the tolerance nature of flow meter. The less flow tolerance the better. Measurable range ratio is 10 to 1 as fuel disp fuel dispenser enser being left factory, testing three flux points, that is, Qmax, 0.4 Qmax, 0.1 Qmax . However, the ratio in operation place is 5 to 1, only testing two flow points -- Qmax , 0.2 Qmax . Minimum measured volume testing Testing purpose is to assess indicative tolerance when refueling by minimum measured value. Relevant regulations stipulate that the minimum flow rate don’t surplus 5L as for a fuel dispenser with maximum flow rate no more than 60L. Its maximum tolerance in terms of minimum measured value don’t exceed ±0.5%, measurable repeatability no more than ±0.25%. Flow stoppage testing The testing is conducted in order to define the possible tolerance range that generated in refueling progress in which hydraulic flow stop sudde fuel dispenser nly due to some accidents like power cut. Vapor separator performance testing It is conducted to value the capacity of vapor separator how much vapor would be divided from oil. Vapor separator’s function is to ensure that media passing over flow meter should be in single direction without any foam or bubble. Otherwise, flow meter can’t get right value of measurement. Volume fluctuation testing The test is aimed at defining the hose’s inner cubage variability of fuel dispenser under maximum pressure condition. According to fuel dispenser’s working principal, hose always fuel dispenser

technical specification

    Version Modifications   number   January 96 1.51  FP31_2.21 IFSF - STANDARD FORECOURT PROTOCOL June 2005   DISPENSER APPLICATION   Page: 16   General Changes   - Changes made based on comments from CECOD and individual   suppliers.   - Many Data_Id s descriptions have been changed to explain their usage in   situations where the Dispenser for technical reasons (W M   requirements or a fixed relationship between the meters nozzles etc.)   fuel dispenser can not allow a mandatory Data_Id value to be written to or changed.   Please check all Data_Id s for details.   Chapter 1 Definitions and Abbreviations   - Extra text definition defining Off-line.   - Extra text definition defining On-line.  June 2005 IFSF - STANDARD FORECOURT PROTOCOL FP31_2.21   DISPENSER APPLICATION   Page: 17   Chapter 3 Dispenser Data Base   - Calculator Data Base   - Extra text explaining the fuel dispenser operation for Data_Id s   2 3 4 5 6 7 21 22 23 24 26 40 41 42 43 44 45 when that do not permit   the Data_Id to be changed remotely.   - Added optional Data_Id 46 Price_Set_Nb.   - 3.4 Meter Data Base   - Extra text explaining operation when Data_Id 1(Meter_Type) Data_Id 2   (Meter_Puls_Vol_Fact) Data_Id 4(PR_Id) are not configured.   fuel dispenser

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    he law may well be ineffective. -holders may step in at Apple s behest and prevent their music being played on rival devices. If it has any effect, the law may backfire. For Apple, France is a dispensable nation. The company could quit the country altogether rather than allow its competitors to take advantage of its music store. As a result, the law may leave France s digital music- lovers with less choice, not more. Put these practical difficulties aside, and ask whether France s policymakers identified a real problem. Are they right to worry about the inseparability of Apple s store and its player? Such controversies normally turn on the analogy chosen to illuminate them is fuel dispenser the iPod like a CD or cassette player, or an inkjet printer? Since it appeared in 2001, the iPod has become this decade s answer to the Sony Walkman. Supporters of the French law point out that if you buy a music cassette at a shop, you can listen to it on any cassette player that takes your fancy. You do not have to play it on a Walkman. Why then can customers not listen to songs from Apple s music store on whatever player they like? Surely Apple is guilty of exploiting the popularity of its store to stifle rivals to its iPod? The law s opponents reach for different analogies. They compare the iPod not to the Walkman, but to printers, games consoles and razors. Buy an inkjet printer, for example, and you must buy the manufacture fuel dispenser r s cartridges to be sure that it will work properly. (Although French parliamentarians will not come to your rescue, European regulators might.) Indeed, manufacturers make much of their money from the cartridges, not the printer itself, which is often sold cheaply. Economists explain this business model as a clever way for companies to “meter?their customers, charging them according to use. If they could not tie their customers to their cartridges, they would charge more for the printer itself, and the kind of person who now uses his printer rarely would not buy one at all. Apple fuel dispenser