This Sirai (pronounced “SUH-RYE”) pressurstat (pressurestat), also known as a pressure switch can be used on most commercial espresso machines with one, two or three groupheads. There are three sets of internal electrical contacts. Can be used for 110 volt, 208 volt, 220 volt, 230 volt, 240 volt, and 400 volt AC.
Some machines require a slightly smaller than full sized pressurestat for prosumer espresso machines, like ECM, Profitec, or Rocket Espresso.
This part regulates your boiler heating element via a diaphragm that expands or contracts as the boiler steam pressure raises or lowers. The switch behind the diaphragm activates the contacts and send power to the heating element telling it to turn on or off. It is by far the most common pressurestat used in our industry.
Most European espresso machine manufactures use British Standard Pipe (BSPP) fittings in their equipment. To measure a fitting, one measures the inside diameter of the male thread on a fitting. Most Sirai have the same fitting: ISO 228 G connection 1/4″M for pipe ø 4×6 mm. This presurstat can replace most full size pressurstats from Parker as well.
- Adjustable Range (bar): 0.5 – 1.4
- Fixed differential 0.15 (± 0.06) bar
- CE-SEV-ASE-UL approved
- Ratings: 400 VAC 30A / 240 VAC 30A
- Fluid temperature maximum: 140°C
This part is a suitable replacement for the following part numbers:
Ascaso 278860, V..289, and V..550
Astoria CMA 20150
Crem 60000000 and 60000005
Expobar 60000000 and 60000005
Faema 2231116597, 2231131900, and 531190310
Fiorenzato CS A2100050 and A2100314
Gaggia 12001274, DM0541, and WGADM0541
Gaggia Spagna 07935703
Grimac 1160800015, 1160800016, A2100314, GR815, GRC615, and V070
Lavazza 10060660 and 10066203
Nuova Simonelli 09200006
Rancilio 34200110, 34200111, and 9006806
Saeco 12001274 and WGADM0541
San Marco 0821, 108007, and CSCPRE0010
Sanremo 10602010 and 10602010A
Spaziale 01101 and 02623
Victoria Arduino 09200006
Wega W10440 and WY20150