Help identify / rebuild 70 y/o valve (custom brass washer needed)

sixplex

So i got these valves on my monoflo system.

They control the flow either by turning the handle,
or removing the main nut, and rotating the stem.

Original packing is rope/string, they leak a bit.

Local company rebuilt one for $200 by putting in 2 brass washers and 2 o rings.


Any idea where i can get custom sized brass o rings to replicate the repair?

sixplex

sixplex

hot_rod

Auto Parts stores have O ring kits. Also hydraulic repair shops for larger sizes.

You can build your own O rings with these kits. Sand and polish the surfaces where the o ring slides.

sixplex

Thanks. What of the brass washers?   O rings are sandwiched between them, a spring held by the packing nut pushes down 

hot_rod

Are the brass washers damaged somehow. Slide them across some emery or wet/dry sandpaper to clean and smooth them.

McMaster Carr is another good source for unusual parts like that.

mattmia2

A fine wire wheel in a drill press or scotchbrite are good for cleaning that up too. There are a few web sites that just sell o-rings where you can get any size or material you want(of synthetic rubber). The brass washers are harder to find if they are severely damaged.

garfieldsimons

Find someone around who has a lathe in their garage or basement. There should plenty around. Turning a washer out of brass is no big deal. Just have to measure them well.

sixplex

Original packing had no washers. Just some sort of string.

They custom made made brass washers

pecmsg

sixplex said:

Original packing had no washers. Just some sort of string. They custom made made brass washers

Teflon String. 

McMaster Carr

ScottSecor

Would something like this work?
https://www.boilersupplies.com/brass-gage-glass-washers/brass-gage-glass-washers/708
https://www.supplyhouse.com/Wal-rich-2712006-Gauge-Glass-Friction-Ring

mattmia2

Use string packing like ti was originally or had been repacked with at some point. There does have to be a washer or tight fitting part of the packing nut that keeps the stem from pulling the packing out with it. Tighten it gently then put more packing in, don't go nuts trying to compress it all at once or you can break the packing nut.

PC7060

MikeAmann said:

Let's not over-complicate this. 

That would be a first! 

sixplex

I've looked at diagrams of other rad valve, they all use brass glands/washers with epdm packing.
Not considering copper.

Stock washers won't do, it needs to be a custom made brass one. Needs to fit pretty tightly in there, the o-ring may bind/tear otherwise eventually

hot_rod

sixplex said:

I've looked at diagrams of other rad valve, they all use brass glands/washers with epdm packing. Not considering copper. Stock washers won't do, it needs to be a custom made brass one. Needs to fit pretty tightly in there, the o-ring may bind/tear otherwise eventually

Uf it has brass washers as the wear surface or retainers for the o ring, I would not leave them out

Valves that use packing string have a packing gland for the packing to reside in and stay put

I wonder if there are online machine shops where you send a drawing of the part you need?

Ive found machinest, welders, roofers, gunsmiths, on the local classified or FB messenger. Retired trades folk that work from a home shop.

Heck a drill motor vice and a file could fab a simple brass washer.