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La Marzocco Technical Bulletin #41 

 

New Steam Wand Assembly on GB/5s and FB/80s 

 
Dear La Marzocco Family Member, 
 
Herewith we would like to inform you about the latest modifications on our machines: 

 
1) Beginning with machine SN# 2487, ALL GB/5 and FB/80 models will be equipped with a new steam wand 
valve assembly, inclusive of a built-in anti-suction valve. 

SEE IMAGE BELOW

 

 

 

 
This feature will avoid the milk suction effect caused by a pressure drop in the boiler occurring after the 

frothing phase. The anti-suction valve will automatically divert the milk drops sucked through the wand and 
discharge them into the drain box.  
 
Furthermore, the new and particular shape of the 

steam valve body (A.1.001.01) allows you to grasp it easily  

with a wrench in order to unlock the steam wand adaptor  (A.1.005) and change the wand effortlessly. 

 

Summary of Contents for GB/5

Page 1: ...nclusive of a built in anti suction valve SEE IMAGE BELOW This feature will avoid the milk suction effect caused by a pressure drop in the boiler occurring after the frothing phase The anti suction valve will automatically divert the milk drops sucked through the wand and discharge them into the drain box Furthermore the new and particular shape of the steam valve body A 1 001 01 allows you to gra...

Page 2: ... units L292 Tube fitting 1 units L292 R Tube fitting 1 units 5 V010 Adhesive fasteners 6 units F 1 002 01 Drain box GB 5 1 units The anti suction drain pipe must be connected to the new part F 1 002 01 drain box For more details please find here enclosed also the new steam valve parts catalogue 2 Another important feature introduced with machine SN 2487 is the PT1000 part E 1 005 temperature probe...

Page 3: ...n 547 17 T 1 060 vacuum breaker steam boiler tubing connection 18 E 1 005 PT1000 temperature probe 21 L140 C expansion valve 22 L037 4 copper washer drain box 23 L146 expansion valve nut 24 L037 2PGR fitting drain box hose barb 25 L037 3 fitting 1 4 BSPP to 1 4 BSPP 26 L037 D drain box nut 27 L037 3R break drain fitting 28 F 1 002 01 drain box from s n 2487 31 L129 1 4 cross fitting nickel 32 B 3 ...

Page 4: ...rom s n 2259 24 to s n 2486 19a 17 17 18 19a from s n 2487 earlier s n 2258 19b 18 1 2 3 4 5 6 32b 7 8 10 11 12 13 14 15 25 26 27 28 29 30 31 32a 34a 33 9 16 34b P o rt a fl o n co a tin g 18 17 Steam wand assembly 12 ...

Page 5: ...1 004 valve seal holder racc per guarn tenuta 14 F 3 005 spring steam valve shaft molla per tenuta 15 H 2 002 PTFE gasket 24x19x2 guarniz PTFE 24x19x2 16 A 1 003 rear tube connector raccordo ingr rub vap GB 5 17 L100 D copper washer 14x10x1 5 rondella rame 14x10x1 5 18 L192 anti suction steam valve valvola antirisucchio per rubinetto vapore 19a B 1 001 01 inclined steam valve complete from s n 225...

Page 6: ... 29 H 1 004 O ring steam wand O ring 3043 10 77x2 62 85 SH 30 H 2 003 steam wand sealing guarn PTFE per snodo tubo vap 31 H 1 003 O ring 117 2 62x13 1 Viton 85 SH O ring 2 62x13 1 Viton per tubo vap 32a T 2 001 steam wand for GB 5 tubo vapore per GB 5 32b T 2 001 TF steam wand for GB 5 with Portaflon coating tubo vapore per GB 5 rivestito in Portaflon 33 L171 G rubber steam tube cover gommino anti...

Page 7: ...5 Anti suction steam valve kit 15 4 10 7 13 1 11 12 2 3 6 4 8 9 ...

Page 8: ...ezza 5 5 V010 adhesive fastners incollini 6 A 5 007 hose clamp fascetta 8 12 banda 8 vite zincata 7 A 7 001 T fitting for anti suction system raccordo a T x antirisucchio 8 L292 tube fitting portagomma 9 L292 R lock nut 1 8 raccordo portagomma 1 8 10 F 1 002 01 drain box pozzetto di scarico 11 L338 L100 plastic fastener 100x2 5 fascetta fermafilo 100x2 5 12 L339 1 vetrotex Ø6 sheath guaina vetrote...

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