U407 Angle Check Valve

U407 Angle Check Valve

U407 Angle Check Valves are installed on suction system, fuel lines on top of fuel storage tanks to maintain prime. Models are available with male threaded inlets for connection directly into tank bung fittings or with female inlets for connection to a nipple that is threaded into a tank bung fitting. Single-poppet models can be used in applications where the valve is easily accessible for maintenance and disc cleaning or replacement.

Materials:

Body: cast steel

Surface: electronic Nickel plated

Seal : Viton Cased Oil Seal

Features:

U407 features a spring-loaded poppet and Viton Cased Oil Seal discs to assist in keeping the valve closed when installed in high-vibration areas

The Angle Check Valves are recommended for use on suction lines where the pressure does not exceed 34 ft of head. ( approximately 15 psi.)

Materials is cast steel diffrent with cast iron materials , the body will be more stronger more hermetical more pressure resistance

Used for disel, gasoline, ethanol etc.

100% Factory Tested.

at random; Select filling types through keyboard; Renew select or cancel the filing operation through keyboard as long as nozzle hasn’t been hold; Supporting various applications When IC card includes many applications, give prompt to user; System supports customer’s various applications; No restriction among applications Automatic balance Calculating turnover in line with the accuracy stipulated in JJG443-98 Metrological appraisal regulation for vehicle fuel dispenser; Turnover automatically is deducted from IC card Automatic generation and saving of deal record Automatically generate filing record after each operation; Ensure the safety of MAC value that used to store and transmit data after record; Each filling unit at least store 1,000 pieces of records; Transmit deal record to centre controller in prescribed time (less than 10s) when fuel dispenser and centre controller is in communicating state; Write deal information needed into IC card according to presetting system requirements; Safety secrecy Both fuel dispenser and terminal are verified interactively; Validity of fuel dispenser should be inspected; fuel dispenser Personal identification of IC card password; Automatically set IC card to be grey card as filling start; TAC and CTC are automatically generated as money deduction, meanwhile erase grey sign; Grey card solution Suddenly pull out IC card will lead to grey sign; if quickly insert IC card into fuel dispenser, system will automatically finish deduction and erase grey sign; When communicated with centre controller, grey IC card is taken off grey sign on each fuel dispenser that on-line centre controller; As filing station that has formed grey card has finished data exchange wi fuel dispenser th data center, any IC card with grey sign is able to deal with on any IC card fuel dispenser that has successfully finished data exchange with data center and is on line. Black card solution IC card fuel dispenser is able fuel dispenser to store at least 20,000 blacklists; Able to identify all black cards; Aut

ecause it is based on random　　numbers r and s and is different every time the calculations are performed even if by the　　same COPT. The latter facilitates replacement of a suspected compromised key.　　To break this method requires an iterative approach and boils down to which value of r in　　the calculation mod q(a to the r) produces R . In addition to discovering r a successful　　penetration would also have to discover s .　　The KD is then manipulated by the Function f() to produce a DES key which we term the　　Key Exchange Key (KEK). The KEK is used to encrypt and decrypt derivation keys which　　are shipped from the controller to the COPT to be used for DUKPT operation.　　Below are the exchange sequences needed to initialize the COPT and to send encrypted data　　to the controller.　　October 2002 IFSF - STANDARD FORECOURT PROTOCOL FP2_1.83　　 COMMUNICATION SPECIFICATION　　 Page: 43　　Key Exchange Sequence　　 fuel dispenser COPT CD　　1. Loads version number into the　　 version_number data field and generate a　　 DMK Default Master Key from it. This　　 version_number is read-only.　　2. Read version_number from　　 COPT and generate the DMK　　 Default Master Key.　　3. Calculate R fuel dispenser encrypt R with　　 DMK and write encrypted R　　 into the COPT data field　　 fuel dispenser

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