U312 Automatic Nozzle

U312 Automatic Nozzle

U312 series automatic nozzles are designed with today's customer in mind. Small, trim, light weight, easy and convenient to operate, the is a rugged performer that offers long life and reliable service.

Warning

Use foreign objects to hold open automatic nozzles could result in failure to shut-off and personal injury.

Materials:

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 :

U312-B/D/F Flow rate: 0-60 L/m (15/16")

U312-A/C/E Flow rate: 0-45 L/m (13/16")

Working Pressure: 0.18Mpa

U312 Automatic Nozzles-or diesel, kerosene and all kinds of gasoline service

Easily replaced spout- simply remove the screw.

Spout kits are available from HONGYANG.

Low profile aluminum body- light weight, easier to handle, provides an attractive, image enhancing appearance.

Hold-open rack is available for full service applications.

The one hand control means easy setting to flow rate for customer's convenience.

Full hand insulator- protects both nozzle and vehicle, and insulates users' hands.

Vacuum Design: Side-Sealing Design.

Selective casting process of body- low-pressure casting technique or high-pressure casting technique.

The high-pressure casting technique can reduce diesel foaming and static electricity.

100% Factory Tested.

Available Colors- color chart on inside back cover Selective splash guard.

Replacement Parts:

Key Description

1 Spout 13/16" & Spout 15/16"

2 Full hand insulator

3 Main Valve Assembly

4 Lever

5 Ratchet Pin

6 Diaphragm assembly

Package:

Net Weight Cross Weight Dimension

18.75kg/case of 15

12.25kg/case of 10 22kg/case of 15

15kg/case of 10 55x34x42.5cm/case of 15

37.5x34x43cm/case of 10

Important:

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.

used to keep a certain position to refuel. Working principal Pressured oil flow into the chambers in where main and vice valve located after switching main valve and flow out of spout because vice valve is opened. Liquid flowage reduces the static pressure and the pressure in upper chamber of switch. The pressure on the chambers of upper and low switch membrane are equivalent due to the front of spout communicating atmosphere. When inlet vent is flooded by oil, the lower chamber of switch membrane still keeps atmospheric pressure. Thus, pressure difference is generated between the upper and lower chambers of switch membrane, the membrane and auto-shut level moving upward, auto controlled level moves downward under the function of switch handle. Finally, steel ball is driven into the hole of auto controlled level; switch handle continues to move downward; main valve is closed. In order to form the auto-shut function, two oil passages with different sections should be set (See Diagram 2-32). Here the Bernoulli equation as followed in order to explain the principle of auto-shut: �? = 12 ρv12+ρgh1=�?+12ρv22+ρgh2 (2--6) Among the above formula: ρ── oil density �?── pressure in main valve passage v1 ── velocity of flow in main valve passage h1── height of main valve �?── pressure in vice valve v2── velocity of flow in vice valve passage h2── height of vice valve Diagram 2-32: Auto-shut nozzle Due to small nozzle body, it could be regarded as a horizontal pipe, that is h1= h2 From Formula 2-6: �?－ｐ2�?2ρ(v22－v12) (2-7) According the follo fuel dispenser wing Formula: v1v2=A2 A1 In the Formula: A1 ── section of main valve passage A2 ── section of vice valve passage The Formula can be converted into: �?－ｐ2�?2ρv22 [1�?A2A1)] It is known from Formula 2-8 that if A2 / A1 is certain value, P2 becomes a fuel dispenser negative value when velocity of flow increasing a certain extent, that is, P2 smaller than at fuel dispenser

f　　 application software and manages the parameterisation.　　 In the absence of a reply to the connection request the ATM periodically renews its request.　　 9.1.2. Synchronisation of application software and applications (context status)　　 This exchange takes place on the logical channel used by an application distributed between　　 the ATM and the monetics server. Its purpose is to determine if:　　 1) The application software of the ATM and the server are synchronised (compatibility of　　 software versions via the compatibility index D5029; Cf. Management of application　　 software compatibility page 87)　　 2) the remote parameterisation of the ATM corresponds to that of the server (last version of　　 all the parameters present on the ATM)　　 From here on this exchange will be referred to as the exchange of context status.　　 The ATM carries out the following processing operations:　　 ? If the application software systems are not compatible the corresponding applications remain　　 inactive: no parameter request and no transaction is possible.　　 ? If the parameterisation of an application does not comply with that of the server the ATM　　 initiates an exchange of parameter requests for this application. If the ATM parameters　　 cannot be updated for any reason the corresponding application remains inactive.　　 The exchange of context status requests takes place on the initiative of the fuel dispenser ATM application　　 under the following circumstances:　　 After an exchange of communication establishment　　 After an exchange of link monitoring revealing a difference in signatures between the lists of　　 para fuel dispenser meter versions present on the ATM and the server　　 After the detection of a loss o fuel dispenser

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