Lined Check Valve
Lined Check Valve
(OP)
Hello together,
Does anybody here know a manufacturer of lined (coated) high pressure check valves? We have an application for well water with extremely high chloride content - average 90000 ppm, max. up to 150000 ppm. Ambient temperature, pH between 6.5 and 7, no solids. Required size is DN 150 or 6", pressure around 2000 psi. I think with this high chloride content even Nickel alloys will not resist although one can assume that the check valve will be completely filled with water all the time (no air pockets). Any ideas? Thanks in advance!
micalbrch
Does anybody here know a manufacturer of lined (coated) high pressure check valves? We have an application for well water with extremely high chloride content - average 90000 ppm, max. up to 150000 ppm. Ambient temperature, pH between 6.5 and 7, no solids. Required size is DN 150 or 6", pressure around 2000 psi. I think with this high chloride content even Nickel alloys will not resist although one can assume that the check valve will be completely filled with water all the time (no air pockets). Any ideas? Thanks in advance!
micalbrch





RE: Lined Check Valve
The issue with any coating be it spray on or metallic in a check valve is potential wear and damage then leading to very high corrosion rates of the substrate material.
For a 6" valve I would have thought you are far better going for a valve of the whole material including all internals in whatever will resist your fluid.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Lined Check Valve
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Lined Check Valve
LittleInch: "..a valve of the whole material including all internals in whatever will resist your fluid". That's exactly my problem. Do you know somebody who manufactures check valves made of or with the aluminum bronze coating you mentioned?
Steve: The pipe is made of powder-coated carbon steel. And any idea who manufactures check valves made of nickel alloy?
RE: Lined Check Valve
You might try offshore- oriented companies with hastelloy c valves. Bronze could be difficult. Is 2000 psi correct (About 138 bar)?.
Other placement at lower pressure possible? No air pockets does not necessarily mean free of air, and resulting corrosive components with composures of combined H/CL/O content should be considered.
Flowserve/ Gestra advices such valves (because of pressure) 'on request'. Maybee higher commercial availabillity if you go down in size from 6". Even if this is the pipeline size, flow conditions might allow a smaller checkvalve. Ask suppliers for advice.
RE: Lined Check Valve
Adding the relevant link to Gestra checkvalves:
http://www.flowserve.com/files/Files/Literature/Pr...
RE: Lined Check Valve
RE: Lined Check Valve
you can also have a look at http://www.chemvalve.com/
good luck with the search!
High-alloy valves for corrosive petrochemical applications.