Clippard Valve Springs

DanFountain · 30th November 2007, 14:41

The Clippard MJV-2 valve seems to be the Dil/O2 manual add valve of choice for homebuilders. Several users (including Paul Raymaekers, Dave Sutton and Corallaro) have suggested replacing the spring that holds the valve closed with a stiffer spring. I think I've found a suitable spring

from Associated Spring Raymond which is avaiable here in the US from MSC Item Detail. I've got some on order and will give them a test. Anybody found anything else which might work?

-Dan

Corallaro · 30th November 2007, 16:09

"stephane" is my clippard spring guru and non only spring guru

.

It is a cylindrical compression spring that i put in position "internally" that you see in image below.

I cut the spring to be not to hard to avoid that can move toward the positions A and B in image below

The diameter of this spring must be able to fit the diameter of internal of, in my case, "T piece" to avoid strange movements, but to be able to make his right movement/compression.

I leave the original conical spring in his position.

This w.e. i hope to measure it.

This is my solution....

Giovanni

Corallaro · 3rd December 2007, 14:48

Hi Guys

these are the photos of my add spring solution

the spring have this measures

diameter 5mm

original lenght 35mm

cutted lenght approximately 26 mm (i cut the spring)

the internal diameter of "T" piece is 7mm

DanFountain · 6th December 2007, 14:32

Well, I got the Raymond springs, and they fit into the Clippard valve bodies perfectly. While the original springs are counter-clockwise wound (i.e. left-hand thread), the new ones are clockwise wound, so they lie right in the bottom-most threads of the valve inlets. They're a little hard to push in all the way, but with a pair of fine needle-nose pliers you can "screw" them in. The new springs stiffen up the valve action considerably - you're not going to want to push on the valve stem without an actuator button!

Valve Springs Small.JPG

The wire is about twice the diameter of the original springs.

Valve Modified Small.JPG

Here's a view into my "crash test dummy" valve with Raymond spring installed. BTW, this is a valve salvaged off a scrapped nitric acid wash tank at work. The outside had a dark patina, but the inside was clean after nearly ten years in service.

-Dan

DanFountain · 7th December 2007, 13:33

Oops! Silly me. I should have known that McMaster-Carr would have these springs! 1692K11 $11.06 for a package of three. Truly a one-stop homebuilt Rebreather store. I've got to take a closer look at the catalog - they've probably got Cooper hoses in there somewhere...

**SeaBass** · 11th December 2007, 04:26

Dan,

Thanks for sharing!

--SB

30th November 2007, 14:41	#1 (permalink)
DanFountain This is my custom title! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Dec 2005 Location: Lake Superior Posts: 113	Clippard Valve Springs The Clippard MJV-2 valve seems to be the Dil/O2 manual add valve of choice for homebuilders. Several users (including Paul Raymaekers, Dave Sutton and Corallaro) have suggested replacing the spring that holds the valve closed with a stiffer spring. I think I've found a suitable spring from Associated Spring Raymond which is avaiable here in the US from MSC Item Detail. I've got some on order and will give them a test. Anybody found anything else which might work? -Dan __________________ Try not. Do - or do not. There is no try. -Yoda
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6th December 2007, 14:32	#4 (permalink)
DanFountain This is my custom title! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Dec 2005 Location: Lake Superior Posts: 113	Re: Clippard Valve Springs Well, I got the Raymond springs, and they fit into the Clippard valve bodies perfectly. While the original springs are counter-clockwise wound (i.e. left-hand thread), the new ones are clockwise wound, so they lie right in the bottom-most threads of the valve inlets. They're a little hard to push in all the way, but with a pair of fine needle-nose pliers you can "screw" them in. The new springs stiffen up the valve action considerably - you're not going to want to push on the valve stem without an actuator button! Valve Springs Small.JPG The wire is about twice the diameter of the original springs. Valve Modified Small.JPG Here's a view into my "crash test dummy" valve with Raymond spring installed. BTW, this is a valve salvaged off a scrapped nitric acid wash tank at work. The outside had a dark patina, but the inside was clean after nearly ten years in service. -Dan __________________ Try not. Do - or do not. There is no try. -Yoda
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7th December 2007, 13:33	#5 (permalink)
DanFountain This is my custom title! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Dec 2005 Location: Lake Superior Posts: 113	Re: Clippard Valve Springs Oops! Silly me. I should have known that McMaster-Carr would have these springs! 1692K11 $11.06 for a package of three. Truly a one-stop homebuilt Rebreather store. I've got to take a closer look at the catalog - they've probably got Cooper hoses in there somewhere... __________________ Try not. Do - or do not. There is no try. -Yoda
(Offline)

11th December 2007, 04:26	#6 (permalink)
SeaBass Thom Susko Current Rebreather/s: Megalodon Ray Home Build Other Rebreather/s: Not Bought Yet Ray Home Build Join Date: Jul 2006 Location: San Clemente, CA Posts: 246	Re: Clippard Valve Springs Dan, Thanks for sharing! --SB
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