espresso safety valve in stock

Used primarily with home or small volume boiler espresso machines. Calibration pressure 2.1 bar (30.45 psi). View the manufacturer"s certificate here.

This is a replacement overpressure valve, also referred to as a safety valve for Rocket home espresso machines. It is compatible with the Rocket Apartamento and the Rocket Mazzafiato.

Voltage Coffee Supply carries the full line of genuine OEM Astoria, Wega, Rio, and CMA espresso machine parts and accessories. Find everything you need to maintain your Astoria, CMA, or Wega Commercial Espresso Machine. Voltage Coffee Supply stocks Common Parts, PM Kits, Service Parts, Water Filtration, and Accessories.

Wega Macchine per Caffè has been a major brand of traditional Italian espresso coffee machines since 1985. The company is owned by the Ryoma holding company based in Milan, which officially acquired the brand in October 2012. Wega’s core business consists of the production and distribution of professional espresso coffee machines, coffee grinders, and accessories.

The CMA company specializes in the production of espresso and super-automatic coffee machines; they also provide tailored technological industrial solutions. Since 2007 CMA has been operating out of a cutting edge production facility located in Susegana, in the Provence of Treviso.

Safety valve 1/8M is a genuine Astoria OEM replacement part. Part number 20357004 is used for certain commercial espresso equipment made by Astoria. This part will help repair specific issues you are having with Astoria commercial espreso machines. Replace this part if Astoria or a service technician has instructed you to do so. Over time Safety valve 1/8M may need to be replaced because of normal wear and tear or if damage has occurred to the existing part. When replacing Astoria part #20357004 it is suggested that no power or water is connected to the machine and you are working in clean and non hazardous environment. Please be sure Safety valve 1/8M fits your specific needs.

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Some unusual faults on a few prosumer espresso machines recently, prompted me to write this article, and the entire article should be read VERY carefully. Ensure you understand the operation of this component and how your machine should work, before jumping to any conclusions.

This valve should not be confused with the vacuum breaker valve, I stress this because I have seen articles on the web mistakenly identifying it as the vacuum breaker valve. The purpose of the pressure relief valve is to vent the boiler in the case of a fault situation. There are 3 main faults that could cause this to operate (as it should). All of these faults can potentially raise the boiler pressure to the 4 or 5 bar it takes to trigger one of these.

A fault in the boiler autofill solenoid causing it to continue filling the boiler whenever the pump runs e.g. when pulling a shot, this is often caused by a small particle or lime scale, sometimes a faulty autofill solenoid valve

In the first case the valve would simply vent steam/water vapour (and the boiler would show a much higher than normal pressure reading), in the last 2 cases; water will spray forcefully out of the vent holes and make quite a mess. If the fault was intermittent overfilling of the boiler it would be quite noticeable when steaming (lots of wet steam) and if small amounts of water (1oz) was drawn to heat an espresso cup, even after waiting 30 seconds the boiler autofill certainly wouldn"t operate.

A small number of people were reporting these valves continually hissing and spluttering and sometimes a small amount (a few teaspoons) of water was collecting on the same side of the machine as this pressure relief valve. This water was the condensate from the continual steam venting. This collecting of water would not happen suddenly it would be a gradual process. It was certainly a different behaviour to the 3 fault conditions described above. This is NOT the same as the normal hissing and spluttering you will get from the vacuum breaker valve as the machine comes up to pressure from a cold start. The vacuum breaker is sealed by the pressure in the boiler; this pressure relief valve is sealed by a spring. Very often faults in espresso machines are caused by scale, but in the case of this valve it"s not likely to be the cause of problems. The reason scale doesn"t affect this valve is because it"s never open unless you have previously (or still have) one of the 3 faults mentioned earlier, then of course the valve could scale up and not seat properly. Initially the manufacturers assumed it was lime scale jamming the autofill solenoid, but I wasn"t convinced as the particular faults I was informed of, did not show the characteristics of the 3 fault types mentioned earlier or lime scale damage as the cause. I asked for a few new ones to be sent to me and got my hands on a failed one, because I wanted to examine them more closely.

This defect in all probability occurred during manufactures assembly of the valve (unless the espresso machine manufacturers assemble them). As the spare units I received seem to be OK, I would imagine (fortunately) that only a small number of valves are affected. The brand new units (or at least the spares I had, were remarkably easy to split, whether this is because no thread lock has yet been applied or whether none is used I do not know. Certainly significant force was needed to disassemble the faulty valve (possibly thread lock or scale in the threads?). I personally use PTFE tape when reassembling such fittings or refitting them to the boiler.

The faults came to light on some Izzo machines and the retailer is checking every stock machine with such a valve, and also their entire stock of spares with immediate effect, simply because it"s not worth taking the chance. I advised them to contact the machine manufacturer and the pressure relief valve manufacturer, because these valves are used on many different makes of prosumer espresso machine . I first heard of this fault some months ago, so probably valves manufactured before June/July 07 are fine and of course one would hope that by mid Nov 07 information reaches the manufacturers and other people concerned and we don"t see the problem again.

If you have had a gentle hissing and possibly some dripping from the pressure relief valve, NOT the vacuum breaker valve. This has been happening on a newish machine (less than 3 months and has happened from the day you got it).

Have a spray of water out of the pressure relief valve whenever you operate the pump, or a pump that never stops running until you switch the machine off or it shorts out.

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