I am sure the answer is out there, although i cant search with anything less than 4 letter words, so 300 bar pst and e7 100 or e7 120 dont really work that well, so forgive me if this has come up before.
I had been thinking of getting a pair of E7-100's and E7-120's - see other thread about doubling them now or later, and had thought that even though the E Series are rated at 3442 psi (so that they are below the 3500psi for HP rating), that the valves would be fairly similar if i wanted to put on a 232 or 300 (is it that figure or around there?) bar valve. I had asked various shops to price these tanks up for me, both in doubles pairs or as 4 single tanks (with or without H valves), i asked for 300bar valves and no-one raised an eyebrow to that. I also had my eye on getting them from Divers Direct near me at a reduced price compared to the other LDS's, but they told me that i wouldnt be able to put a 300bar valve on the E Series tanks due to the neck thread being 7/8" and that not being suitable for 300 bar valves, but fine for the 232bar/K-yoke valve that comes standard with it. However when i was researching this stuff on Dive-Rite Express, who pretty much only sell PST steel tanks, they have the ability to put on 300bar valves and manifolds etc. So now i am quite confused, are some cast with 7/8" threads and can only be used with that 232bar valve and others with another (cant recall what dia thread) that can only be used with 300bar? I know various people on here dive those tanks, do you use the 232 or 300 bar valves?? Did you have to order them a certain way to be able to use those tanks and valves? Maybe the ones available to DD are only the 232bar compliant ones and others can get the 300bar valves and compliant tanks. The reason i ask about this is that my instructor mentioned that i should try to get 300bar valves instead of 232 - i just followed him on this, what actual advantage is there in this - just that they can take a higher pressure?? Our regs are 300bar DIN so should be no problem there.
I swear, buying equipment is the most confusing part of diving!
I had been thinking of getting a pair of E7-100's and E7-120's - see other thread about doubling them now or later, and had thought that even though the E Series are rated at 3442 psi (so that they are below the 3500psi for HP rating), that the valves would be fairly similar if i wanted to put on a 232 or 300 (is it that figure or around there?) bar valve. I had asked various shops to price these tanks up for me, both in doubles pairs or as 4 single tanks (with or without H valves), i asked for 300bar valves and no-one raised an eyebrow to that. I also had my eye on getting them from Divers Direct near me at a reduced price compared to the other LDS's, but they told me that i wouldnt be able to put a 300bar valve on the E Series tanks due to the neck thread being 7/8" and that not being suitable for 300 bar valves, but fine for the 232bar/K-yoke valve that comes standard with it. However when i was researching this stuff on Dive-Rite Express, who pretty much only sell PST steel tanks, they have the ability to put on 300bar valves and manifolds etc. So now i am quite confused, are some cast with 7/8" threads and can only be used with that 232bar valve and others with another (cant recall what dia thread) that can only be used with 300bar? I know various people on here dive those tanks, do you use the 232 or 300 bar valves?? Did you have to order them a certain way to be able to use those tanks and valves? Maybe the ones available to DD are only the 232bar compliant ones and others can get the 300bar valves and compliant tanks. The reason i ask about this is that my instructor mentioned that i should try to get 300bar valves instead of 232 - i just followed him on this, what actual advantage is there in this - just that they can take a higher pressure?? Our regs are 300bar DIN so should be no problem there.
I swear, buying equipment is the most confusing part of diving!
