Pressuretrol to Modulate a Vapor System???

Gman_3

Can anyone recommend a replacement for the discontinued Honeywell L91B-1019 pressuretrol to modulate a burner on a vapor steam system from 0 to 10 ounces (NOT lbs)? The new 1035 model goes from 0 to 15 lbs which is not designed to modulate solely in the 0 to 10 OZ range.                                        



Any thoughts on where to find a manufacturer's substitute or even surplus unit?



Thanks!  Gman

nicholas bonham-carter

low pressure steam control

what you need is now called a vaporstat. do a search here for the term and someone will have posted part numbers. find out whether you need "make", or "break" on rise.--nbc

[url=http://www.patriot-supply.com/search_new.cfm?q=vaporstat&search=Go]http://www.patriot-supply.com/search_new.cfm?q=vaporstat&search=Go

Steamhead

Uhhhh, Nick

he needs a control that will vary a modulating burner. The Vaporstat is an on-off type of control.



Gman, you're sort of stuck with the 1035 for now. It will modulate from 0 to 1 pound if you set the main at 0 and the differential at its lowest point ("A", I believe). Someone told me Siemens has a better unit but I can't remember who.

nicholas bonham-carter

thank goodness you are here!!

here is what i could find on the early siemens threads:

[url=http://www.heatinghelp.com/search/results/Siemens-RWF40/1]http://www.heatinghelp.com/search/results/Siemens-RWF40/1

could not 2 vaporstats be used for this app? the siemens controller is about 5 times the vaporstat price.--nbc

Gman_3

Sieman's

Nick and Steamhead,

Guys, thanks so much for the feedback.  Sieman's controller looks great.  Price however is really steep.  Am wondering if LHL is looking more realistic???  Guess market for vapor is shrinking fast.

Have asked Honeywell to get back to me on where differential low and hi point would on the 1035 if Main setting was set to zero.  Glenn