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kid753
06-22-2008, 05:41 PM
I am looking for replacement diaphragms for brass Moody Control valves. The number stamped on the top with the solenoid appears to be 2888. Also, does anyone know if they are 24V DC?
kid753

Wet_Boots
06-22-2008, 06:52 PM
Got a photo? Got a size? 24VDC? Try 24VAC.

kid753
06-22-2008, 08:04 PM
The diameter of the diaphragm is 2 1/8 inches. I imagine the valves may be up to 50 years old given the age of the house.

Wet_Boots
06-22-2008, 10:23 PM
There is more than one series of Moody brass valves, so you need to bring a little more detail, or just pick up your phone and checkbook, and hire it done.

irrig8r
06-23-2008, 10:42 AM
They have a crappy and disfunctional website, but The Source, formerly R-Co Parts, probably has the parts you need.

They have a paper reference manual with exploded views of lots of valves. The online version isn't up yet.

http://thesource-online.com/RCORef.pdf has been "coming soon" for a long time.

If you PM me with the valve series number I could probably scan and send a pdf of the page with part numbers.

Check with your distributor and see if they have a paper copy because if you don't know the valve series, sometimes it's easier to compare pictures.

As for the voltage, disconnect your wires, fire up the zone and check... you'll probably read between 24 and 30 VAC.

Wet_Boots
06-23-2008, 10:54 AM
A fair question is whether it's even worth it to chase down diaphragms, if the valves could be replaced with plastic ones. Some old diaphragm assemblies will cost more than a brand-new valve.

irrig8r
06-23-2008, 12:13 PM
Yeah, but they might last another 50 years.

R-Co Parts book shows:

9000B series, 3/4" to 3". They have a post and coil style solenoid.

6000D series, 1" and 2". They have a horseshoe shaped solenoid and an upright bleed plug on a raised portion opposite the solenoid. They also have only 4 bolts through the bonnet where the others have 6.

RCV 170, 3/4", 1" to 2" and 2-1/2" to 3". They have a wingnut style bleed screw set at an angle and a cylindrical solenoid.

Mike Leary
06-23-2008, 12:37 PM
I would take a close look at the seats before ordering parts.

Wet_Boots
06-23-2008, 01:16 PM
I would take a close look at the seats before ordering parts.Also look at the seats for the solenoids, as they can erode, and render the valve useless.

Dripit good
06-23-2008, 02:22 PM
I am looking for replacement diaphragms for brass Moody Control valves. The number stamped on the top with the solenoid appears to be 2888. Also, does anyone know if they are 24V DC?
kid753

Many times it's best to replace something rather than spinning wheels and taking the time to attempt a repair on something.

FIMCO-MEISTER
06-23-2008, 07:26 PM
Repaired many a moody but now my policy is to cut them out unless it is a nightmare situation.

Wet_Boots
06-23-2008, 07:33 PM
I recall some overlap of Nelson and Moody stuff - did Moody offer a newer series of brass valve than the RCV series? I know Nelson did, with those orange Moody solenoids.

k911lowe
06-23-2008, 07:36 PM
A fair question is whether it's even worth it to chase down diaphragms, if the valves could be replaced with plastic ones. Some old diaphragm assemblies will cost more than a brand-new valve.

replace the valves.end the relics to the Smithsonian.

FIMCO-MEISTER
06-24-2008, 06:14 AM
I don't know what the deal is but a couple of the last few Moody's we repaired didn't work. They wouldn't open. I checked everything to try and find an anomaly and couldn't find a single reason for it. Had to eat the repair parts and time when we replaced the valve anyway. If its inevitable get it over with. Same rule applies to old buckners as well.