piedmontg
Aluminum
- Joined
- Dec 10, 2007
- Location
- NW Illinois
Hi
I have a NAPA 907770 regulator rated for 300psi, regulating range 10-250 psi. It is on a Quincy 7.5HP set at 175PSI.
It has been working fine for about 5 years. I use it to regulator the line pressure, usually set at about 100PSI. When it ran today the regulator started making a lot of noise like when I change the pressure down. The needle fluctuates all over the place and air comes out of the relief hole near the top of the regulator constantly.
I pulled the unit apart and looked at the diaphragm and could not find a tear or hole in it. If I set the regulator to a pressure lower than the tank pressure it does the above ie when it tries to regulate. If I set it to a pressure higher than the tank pressure it does not make any noise, which I would suspect as it is really not doing anything from a regulating point of view.
Any advice , a replacement diaphragm from NAPA is going to be almost $40 and I am not sure that is the problem. I pulled the bottom off the regulator and it is just spring, oring, and the plunger that goes to the bottom of the diaphragm. Did not look like an issue.
I know nothing about regulators so not sure what to try - any advice would be appreciated.
Thanks
Bob
I have a NAPA 907770 regulator rated for 300psi, regulating range 10-250 psi. It is on a Quincy 7.5HP set at 175PSI.
It has been working fine for about 5 years. I use it to regulator the line pressure, usually set at about 100PSI. When it ran today the regulator started making a lot of noise like when I change the pressure down. The needle fluctuates all over the place and air comes out of the relief hole near the top of the regulator constantly.
I pulled the unit apart and looked at the diaphragm and could not find a tear or hole in it. If I set the regulator to a pressure lower than the tank pressure it does the above ie when it tries to regulate. If I set it to a pressure higher than the tank pressure it does not make any noise, which I would suspect as it is really not doing anything from a regulating point of view.
Any advice , a replacement diaphragm from NAPA is going to be almost $40 and I am not sure that is the problem. I pulled the bottom off the regulator and it is just spring, oring, and the plunger that goes to the bottom of the diaphragm. Did not look like an issue.
I know nothing about regulators so not sure what to try - any advice would be appreciated.
Thanks
Bob