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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

    erally is mounted centrifugal pump installed in tank. The inlet pressure of fuel dispenser with submersible pump is higher than atmospheric pressure. Submersible pump consists of pump, connecting pipeline and controller. The appearance of submersible pump and its position in tank is showed in diagram 2-10. Diagram 2-10: Submersible pump position and figure Submersible pump is composed of motor and centrifugal pump. Pump motor includes electromotor, wiring panel, overheat protector and pipeline; centrifugal pump has the elements of filter, anti-static subassembly, impeller and pump axis. Diagram 2-11: Main structure of submersible pump Connecting pipeline has two types of fixed and stretched. The former type consists of oil pipe, vapor-recovery pipe, lead pipe and wire. The later type is formed by oil pipe, vapor-recovery pipe, adjusting nut, lead pipe and motor wire. Controller is divided as two parts, upper and lower. Upper part have these components junction box, electric bridge, capacitor, exhausting plug, check valve, pressure adjustor, testing interface of exhaustion and pressu fuel dispenser re, leakage monitor of pipe. However, lower part is constituted by pipe jointer, lead terminals, pump holder, etc. By function, submersible p fuel dispenser ump is classified as four categories, namely, standard type, enhanced type, changing-frequency type and large flow type. The standard type access to general requirements, but the enhanced type not only increase flux than standard type, but also available to mix liquid of gasoline with alcohol. The changing- frequency submersible pump adopt pipe pressure to judge flux. Given a situation in inefficient flux and low pressure the electric frequency of motor would tune high through computer, so as to elevate rotate speed and increase flux. Contrarily, to reduce electric frequency and rotate speed as pipe pressure being low, adjusting appropriate flowage. The large flow type is adapted in filing station in where fuel dispenser needs quickly operation. Some submersible pump has the flow speed of more

technical specification

    Date :  POS Department   ? Refusal of data received: the slave refuses the data frame received and does not take it   into account; it is up to the master to either continue the session or not by repeating the   data frame.   Value = NAK (0X15)   ? Closing of communication: the master warns the slave that the session in progress is   finished.   Value = EOT (0X04) Protocol description   ? Normal transmission:   Master Slave   Communication open   Opening accepted   Data   Received data accepted   Communication closed   ? Data refusal by slave (frame invalid):   Maste fuel dispenser r Slave   Communication open   fuel dispenser Opening accepted   Data   Received data refused   Data   Received data accepted   Communication closed   The master attempts Fr-1 repetitions of data transmission before closing the communication.   ? Data not received by slave:   Master Slave   Communication open   Opening accepted   Data fuel dispenser

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    pe of those who, for the past 15 years, have been searching for ways of triggering that metabolic adaptation by means other than semi-starvation. The search for a drug that will stave off old age is itself as old as the hills—as is the wishful thinking of the suckers who finance such efforts. Those who hope to find it by mimicking the effect of calorie restriction are not, however, complete snake-oil salesmen, for there is known to be a family of enzymes called sirtuins, which act both as sensors of nutrient availability and as regulators of metabolic rate. These might provide the necessary biochemical link between starving and living longer. An elixir of life? Boosting the activity of sirtuins in yeast, nematode worms and fruitflies (three rapidly reproducing stalwarts of biological laboratories) does indeed result in longer lifespans. In 2003 a team led by David Sinclair of Harvard Medical School described 19 plant-derived molecules that activate sirtuins in yeast. One of these molecules, resveratrol, is found in red wine—which created excitement among those who think that fuel dispenser a wine-rich diet is part of the explanation for the healthy old age apparently enjoyed by many who live in southern Europe. In February, a fuel dispenser group led by Dario Valenzano of the Scuola Normale Superiore in Pisa, Italy, showed that the effect applies in vertebrates, too. Dr Valenzano s experiments with resveratrol increased the maximum lifespan of a small fish, called Nothobranchius furzeri, by 60%. (Nothobranchius furzeri was chosen because it is the shortest-lived vertebrate known, with a normal maximum lifespan of 12 weeks.) Resveratrol, however, is only a starting point. Sirtris Pharmaceuticals, a firm based in Cambridge, Massachusetts, of which Dr Sinclair is a co-founder, has identified a number of synthetic molecules whose effect on yeast is many times more potent than resveratrol s. Although there is, as yet, no published eviden fuel dispenser ce that sirtuins extend life in mammals, or that resveratrol activates