U405 Reconnectable Breakaway

U405 Reconnectable Breakaway

The U405 is a dry reconnectable breakaway for the conventional dispensing market. It is designed to be installed on fuel dispensing hoses, and will separate when subjected to a designated pull force. The dual valves seat automatically stopping the flow of fuel and limiting any fuel spillage, while protecting the dispensing equipment. When reconnecting the separated halves, the U405 seals tightly on an O-ring before the poppet stems engage to open the valve. For proper operation on high-hanging hoses, the U405 must always be installed With a straightening hose with a minimum length of 9". For low hose applications, the U405 should be installed down stream of the retractor cable.

WARNING

We advice you replace a new U405 breakaway when the pull-force is lower than 180 lbs after many reconnections

Materials:

Body: die cast zinc

Main Seals: Viton

Main Spring: stainless steel

Guide and poppet: POM

Protective Sleeve: Pa66

Features:

Pull force- the U405 will break away with a pull force of 250 lbs 5%, the U405 will break away with a pull force of 300 lbs 5%.

Unique double-poppet design-features low pressure drop.

Flow rate: 0-60L/Min

Working pressure: 0.18Mpa

Coupling halves- protected by proven plastic sleeves

Easily reconnected- just "push and twist" until you hear the audible click, signifying the unit has been correctly reconnected. Reconnection force approximately 15 lbs.

Line shock - U405 is able to absorb the effects of normal line shock through the unique design of the disconnecting features.

May be reconnected under wet or dry hose conditions.

100% Factory Tested.

Package:

Product ID Net Weight Cross Weight

U405-A 26.5kg/case of 50

30kg/case of 50

35x35x26 cm3 /case of 50

U405-B 26.5kg/case of 50 30kg/case of 50

35x35x26 cm3 /case of 50

U405-C 26.5kg/case of 50 30kg/case of 50

35x35x26 cm3 /case of 50

U405-D 26.5kg/case of 50 30kg/case of 50

35x35x26 cm3 /case of 50

Diagram 2-7: Installation of framework oil seal Important notices to disassembly and reassembly As pump and motor are the resource of power one should pay much attention to disassembly and reassembly of pump. Be sure that cut power prior to maintenance. Disconnecting V belt in case to cause a fuel dispenser ny accident, prepare a container to collect oil that will pollute environment. Grind the semicircle keyway on pump axis using sand paper before disconnecting pump cover in order not to scratch framework oil-seal by burr. All components should be carefully cleansed prior to reassembly of pump in case dirty substance flow into pump and cause new trouble. Turn rotor and examine the vane working state after installing rotor subassembly and spring in pump chamber. Meanwhile, be sure that the position of vane fuel dispenser should higher than rotor, low pump frame even. A little grease should be daubed on the inner of brass bushing and framework oil-seal when installing pump cover. When installing the bolts of pump cover each tension is coherent as the sequence that opposite bolts go first. After reassembly of pump to check inspect the rotation of pump. The seal ring between pump and vapor-recovery should be carefully examined before installing in case of leakage. Be sure that the two V wheels of motor and fuel dispenser pump in line, having any obvious jump and wave. Internal gear pump Fuel dispenser is mounted now with two types of internal gear pump, namely, involute gear pump and inner cycloidal gear pump. In the former type a piece of crescent clapboard is installed between small gear and inner gear, dividing suction chamber with discharge chamber. However, in the latter type the division is realized through joint between gears, without clapboard. The smaller gear in internal gear pump is driver. Diagram 2-8 illustrate above gear pumps. Internal gear pump characterized that compact, light in weight, low noise and long service life still has disadvantage of complicated gear figure and high cost. Domestic market now has these two kin

- Free Form Topology (FTT-10 78 kbitss)　　LonWorks Specific Network Parameters　　Addressing - the top level of the addressing hierarchy of a LonWorks network　　 is a domain. If different applications are to share a communication　　 network fuel dispenser they may be separated into different domains.　　 All forecourt devices are installed in domain 1.　　 - the second level of addressing is the subnet. A subnet is a logical　　 grouping of nodes from one or more channels. There may be up to　　 255 subnets per domain.　　 - the third level of addressing is the node. There may be up to 127　　 nodes per subnet.　　 - grou fuel dispenser p addressing facilities are not used.　　The Lontalk protocol offers four basic message services these being:-　　 ACKD REQUESTRESPONSE UNACKD_RPT UNACKD　　The service implemented on the IFSF network is ACKD. The ACKD service is were a　　message is sent to a node and individual acknowledgements are expected back from each　　recipient node. If the acknowledgements are not all received the sender times out and retries　　the transaction. The number of retries and the time-out val fuel dispenser ue are variable and are set along　　with the network parameters by application level code (layer 7 OSI model) see below for　　parameter description and the values set in the IFSF network implementation:-　　FP2_1.83 IFSF STANDARD FORECOURT PROTOCOL October 2002　　 COMMUNICATION SPECIFICATION　　Page: 8　　Priority Slot:1 Determines if message has priority over other messages　　 improves response time of critical messages (set to 1 to　　 allow for the creation of emergency messages).　　Retry =3

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