What is the steam valve nut seal
This is a small seal located under the nut that holds the steam valve or steam wand rod in place. Its job is to seal the joint between the nut and the valve body so that no steam or hot water escapes through the thread while frothing milk or releasing steam.
Signs of wear
When the seal hardens, cracks or loses its elasticity, the joint stops holding pressure. When opening the steam valve you can see hissing or dripping around the nut, or feel steam escaping even with a slight turn of the wand. Sometimes the nut itself becomes slightly loose, as the seal no longer maintains the necessary pressure in the joint.
Why you shouldn't put off the replacement
Leaking steam means a loss of pressure and temperature needed for quality milk frothing, along with unnecessary increases in water and energy consumption. Prolonged leakage also puts strain on the surrounding threads and can lead to damage of the valve itself, which is a more costly repair than simply replacing the seal.
Selection advice
Since nut seals vary in size and material depending on the specific valve type, please check compatibility in the product table before ordering.
Compatible with
- S20 (VERS2)
- BASIC-D (20130620-)
- BASIC-M (20130620-)
- CLASSE-6 (20121117-)
- CLASSE-6-LEVA-07 (20130129-)
- CLASSE-6-S-07 (20140121-)
- CLASSE-7-LEVA (20121117-)
- CLASSE-7-S-14 (20150211-)
+ 96 more compatible models
- CLASSE-9 (20130129-)
- CLASSE-10 (20130115-)
- CLASSE-10-USB-07 (20140121-)
- EPOCA (20140116-)
- EPOCA-1-GR-E-07 (20141126-)
- EPOCA-1-GR-S-07 (20141126-)
- CLASSE-5-S (20180223-)
- CLASSE-5-S-TANK-1GR (20180223-)
- CLASSE-5-USB (20160929-)
- CLASSE-5-USB (20180223-)
- CLASSE-5-USB-1GR (20170720-)
- CLASSE-7 (20141021-)
- CLASSE-7-USB-16 (20171115-)
- CLASSE-7-USB-16-TALL (20210318-)
- CLASSE-8 (20140121-)
- CLASSE-8-DE-07 (20121117-)
- CLASSE-9-USB (20210218-)
- CLASSE-9-USB-X-CELSIUS (20121212-)
- EPOCA-S-07 (20140121-)
- BASIC-D (20191204-)
- BASIC-M (20191204-)
- CLASSE-5-COMPACT-21 (20231213-)
- CLASSE-5-COMPACT-22 (20221216-)
- CLASSE-5-COMPACT-TALL (20231213-)
- CLASSE-5-ECO (20230512-)
- CLASSE-5-ECO-TALL (20230928-)
- CLASSE-5-S-1GR (20220325-)
- CLASSE-5-S-21 (20231213-)
- CLASSE-5-S-22 (20221207-)
- CLASSE-5-S-TANK (20221202-)
- CLASSE-5-TALL-21 (20231213-)
- CLASSE-5-TALL-22 (20230725-)
- CLASSE-5-USB (20180525-)
- CLASSE-5-USB-1GR (20220325-)
- CLASSE-5-USB-1GR-21 (20231213-)
- CLASSE-5-USB-1GR-22 (20230725-)
- CLASSE-5-USB-21 (20231213-)
- CLASSE-5-USB-22 (20221116-)
- CLASSE-6-E-07 (20191204-)
- CLASSE-6-S-07 (20210420-)
- CLASSE-7-E (20160628-)
- CLASSE-7-E (20191204-)
- CLASSE-7-E-14 (20191204-)
- CLASSE-7-S (20160628-)
- CLASSE-7-S (20191204-)
- CLASSE-7-S-14 (20191204-)
- CLASSE-7-S-21 (20231213-)
- CLASSE-7-S-22 (20230421-)
- CLASSE-7-USB-21 (20231213-)
- CLASSE-7-USB-21-TALL (20231213-)
- CLASSE-7-USB-22 (20220622-)
- CLASSE-7-USB-22 (20230421-)
- CLASSE-9-S (20221112-)
- CLASSE-9-USB (20221115-)
- CLASSE-10-S-07 (20140121-)
- CLASSE-11-USB (20150716-)
- CLASSE-11-USB (20221112-)
- CLASSE-11-USB (20240109-)
- EPOCA-1GR-E-07 (20210420-)
- EPOCA-E-07 (20170223-)
- EPOCA-E-07 (20210420-)
- EPOCA-S-07 (20140919-)
- EPOCA-S-07 (20191113-)
- EPOCA-S-07 (20210420-)
- S20-NSF (REV.1)
- Z11 (REV.1)
- CLASSE-5-COMPAC (20200904-)
- CLASSE-5-COMPACT (20221112-)
- CLASSE-5-COMPACT-TALL (20221207-)
- CLASSE-5-S (20160714-)
- CLASSE-5-S (20221207-)
- CLASSE-5-TALL (20220708-)
- CLASSE-5-USB (20210318-)
- CLASSE-5-USB (20210508-)
- CLASSE-5-USB (20220113-)
- CLASSE-5-USB (20220708-)
- CLASSE-7-S-16 (20170408-)
- CLASSE-7-S-16 (20221116-)
- CLASSE-7-USB-16 (20170408-)
- CLASSE-7-USB-16 (20200516-)
- CLASSE-7-USB-16 (20220225-)
- CLASSE-7-USB-16 (20221116-)
- CLASSE-7-USB-16-TALL (20220416-)
- CLASSE-9-RE (20201119-)
- CLASSE-20-ASB (20220316-)
- INVICTA (20220503-)
- CLASSE-6-LEVA-07 (20210420-)
- CLASSE-7-LEVA (20191204-)
- CLASSE-7-LEVA-14 (20191204-)
- CLASSE-9-USB-XCELSIUS (20221116-)
- CLASSE-11-USB-XCELSIUS (20150716-)
- CLASSE-11-USB-XCELSIUS (20221115-)
- CLASSE-11-USB-XCELSIUS (20240109-)
- CLASSE-20-SB (20220630-)
- S20 (REV.2)
- CLASSE-5-S-1GR-22 (20230512-)
| Manufacturing company | Rancilio Group S.p.A. |
|---|---|
| Address | Viale della Repubblica 40, 20015 Villastanza di Parabiago (MI), IT |
| info@ranciliogroup.com |


