ryguy Senior Member Joined: 2 Aug 2009 Posts: 287 Location: Indiana Expertise: I love coffee
Espresso: Bezzera BZ02S Grinder: Pharos, B. Vario
Posted Sun Oct 28, 2012, 7:20pm Subject: Can't identify OPV-like valve on Bezzera BZ02S
This is a question from an old thread that I don't think was ever answered. In the picture, there are 2 valves that look like OPVs with tubes going to the reservoir. When I run the pump with no portafilter attached, the tube coming from valve 2 sputters water back into the reservoir and valve 1 does nothing. When the pump has backpressure put on it, whether from a puck or a blind basket, valve 1 returns water into the reservoir at a much more consistent rate, while valve 2 does nothing.
Apparently valve 2 isn't an OPV since it only lets water through the tube at low pressure. But what is it?
I scoured Bezzera's manual, and valve 1 appears to be a suppression valve which I think is an OPV. There is a similar-looking valve described as a check valve in the specs for the direct connect model only, but I have the tank model, and I can't find anything that looks like the second "OPV" in my model's specs.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
![ryguy: bz02s_opv.jpg](javascript:ImagePopup("/images/59049/bz02s_opv.jpg", 600, 801, "ryguy: bz02s_opv.jpg");)
= No New Posts since last visit 