Mikey P
Administrator
and please explain why you chose one over the others
What sort of vacuum relief valve do you use?
- Thread starter Mikey P
- Start date
bob vawter
Grassy Knoller
So i can duct tape off all but one hole........
R
R W
Guest
I replaced my factory Genesis valve (spring loaded, on top of the waste tank), to a nicer spring loaded valve that is used on older Powermatics. I have it screwed into a PVC coupling, which raises it up out of the tank, away from the "guck" flow that makes it past the filter. It works well.
MicahR
Member
I recommend Bayco's over the Kunkles because of the needing more maintenance.
If my service guy would get on board with them I'd have more customers with them.
He's too old school.
If my service guy would get on board with them I'd have more customers with them.
He's too old school.
G
Guest
Guest
Mine has a football and a Mayonnaise jar lid with holes punched in it. Like Bob, sometimes I'll cover up the other holes with tape.
:?
:?
Jay D
Member
47 blower ma- chine free flow set at 15 hg, 33 blower ma- chine NO vac relief cuz hg don't go no higher then 13 anyhow. Works on my hackmounts. 8)
To quote a very wise man...free flow is a good way to turn a 300cfm blower into a 200 cfm blower, a continued and constant leak is a leak.
Cover that leak, and give it a pop off point, and allow it to climb to that pop off point and reset, this resetting is called a cycle and keeps vacuum safe and optimized, no matter if it's an uph. tool or a 24" drag wand, or even a waterclaw.
Cover that leak, and give it a pop off point, and allow it to climb to that pop off point and reset, this resetting is called a cycle and keeps vacuum safe and optimized, no matter if it's an uph. tool or a 24" drag wand, or even a waterclaw.
Larry B
Member
With the 2.5" swivel cuffs there is more than enough air leaks 
Jim Martin
Supportive Member
Shawn Forsythe
RIP
MicahR said:
I also like the Bayco's weight difference (much lighter), that offers more flexibility in mount locations.
Jay D
Member
Are'nt most kunkle/bayco type valves equipped with a pvc cap with holes in it to keep it from dropping completely to a completely open hole, thereby losing too much hg? Were is the difference? Bayco type vavles open at 15, and the cap keeps them from dropping below what 12 or so? I guess it burps the system as mine is set at 15 all the time. I guess if i wanted to try dual wanding all the time it would be more of a concern. 33,36,45 require less air loss to get a set hg. Different way of doing it. I do have a mechanical air adjustment on mine for less air loss if i want to adjust it. Never had a bayco as mine works fine the way it is. :roll:
Shawn Forsythe
RIP
Jay DeLaughter said:
Yes, and no. The valve manufacturer does equip them. The end unit TM parts supplier provides those, and to various specifications. The purpose is to slow the ingress of air, when the valve is activated at its set point. The slowing of the ingress permits the valve to recover to a set position before too much vacuum is lost by the large CFM capacity an open Bayco/Kunkle valve has. The net result is a dampening of the effect of cycling if the wand/carpet interface is not allowing enough airflow to maintain a vacuum level below the set point.
Dolly Llama
Number 5
stock spring relief that comes on Powermatics.
best I've ever seen.
(not all spring relief valves are created equal)
I know it's not trendy with the "in" crowd, but I don't think much of the Bayco valve.
You loose a couple HG every time it cycles.
Maybe the guys that like them had junk relief valves to start with
the "free flow" set up, for those that don't know, is nothing more than a permanent air leak.
Never tried one myself.
'bout the closest I've come to a "free flow" set up was when my waste tank gasket was shot....
..L.T.A.
best I've ever seen.
(not all spring relief valves are created equal)
I know it's not trendy with the "in" crowd, but I don't think much of the Bayco valve.
You loose a couple HG every time it cycles.
Maybe the guys that like them had junk relief valves to start with
the "free flow" set up, for those that don't know, is nothing more than a permanent air leak.
Never tried one myself.
'bout the closest I've come to a "free flow" set up was when my waste tank gasket was shot....
..L.T.A.
Zee
Supportive Member
Kunkle... Because it came with my truckmount factory installed.
Zee
Zee
Ron Werner
Member
My Big Red I simply drilled some holes in the filter box, set two bolts with springs and wing nuts and away I went. Worked great.
The CanAm has a Bayco. Works fine and no muss no fuss.
The CanAm has a Bayco. Works fine and no muss no fuss.
Shane T
Member
Kunkle cuz I got them wholesale. They are mounted on the SS tank lid making them even heavier to lift off. If I ever had to replace I'd probably go with Bayco for that reason. What maintence is required? I've never noticed any malfunction.
Mikey P
Administrator
What could the 2 "Others" be?
the Wangomatic?
the Wangomatic?
G
Guest
Guest
Shawn Forsythe said:
Then you would really like the weight difference in the SOVC
G
Guest
Guest
What machine did "you" use with an sovc valve?Mikey P said:
Larry Cobb
Member
We've tried a few Kunkle valves over the years and experienced some issues with cycling.
These can be solved with some careful tuning, but why is that required with a very expensive valve ?
We have chosen a high quality brass valve with a bearing for the sliding shaft.
We have an assortment of SS springs to tune it for the vac relief settings we utilize (normally @17").
We feel that it is the most cost effective relief valve on the market...
I would rather use design dollars on less restrictive silencers for the blower...
or the new 4MR Sutorbilt blower.
Larry
These can be solved with some careful tuning, but why is that required with a very expensive valve ?
We have chosen a high quality brass valve with a bearing for the sliding shaft.
We have an assortment of SS springs to tune it for the vac relief settings we utilize (normally @17").
We feel that it is the most cost effective relief valve on the market...
I would rather use design dollars on less restrictive silencers for the blower...
or the new 4MR Sutorbilt blower.
Larry
Leslie Judson Jones
Member
- Joined
- May 12, 2007
- Messages
- 2,242
When Judson first introduced the kunkle valve to the carpet cleaning industry in 1968, it was part of the industry's first patented gasoline powered carpet cleaner. This unit was also a PTO unit. The truckmount had a 4 foot wide wand. It was used to clean football fields. The main reason a kunkle was used in this application was the high volume of the #8 blower. What the kunkle did was allowed the blower to pump all 1200 CFM out of the recovery tank so the massive four foot wand could get as much CFM as possible.
Once we went into production in 1972 on slide-in truckmounts you will see a vacuum relief valve in the photo below. This valve can be purchased from Home Depot. It's actually part of a home well water system called a foot valve. We take this valve and increase the spring tension with a stiffer spring. We adjust this valve by adding or taking away washers to get it to relieve at 15 inches of mercury.
Through the years we've done testing on conventional slide-in units with kunkle-type valves. We feel the use of a kunkle valve on a conventional slide-in unit is not noticable until you are using more than 300 feet of hose. As the hose length is increased the resistance of trying to pull the air is increased. The kunkle will allow the system to run at a few inches higher lift than normal. This in turn gives the vacuum more power to pull more CFM through longer hoses. One interesting thing we did with a kunkle-type valve on a TNT is that we ran 950 feet of hose with a 14 inch wand. All the hose was 2 inch. We were cleaning commercial low loop carpet. There was not a tremendous amount of vacuum left, but it was enough to get the job done with the use of a dry stroke.
Once we went into production in 1972 on slide-in truckmounts you will see a vacuum relief valve in the photo below. This valve can be purchased from Home Depot. It's actually part of a home well water system called a foot valve. We take this valve and increase the spring tension with a stiffer spring. We adjust this valve by adding or taking away washers to get it to relieve at 15 inches of mercury.
Through the years we've done testing on conventional slide-in units with kunkle-type valves. We feel the use of a kunkle valve on a conventional slide-in unit is not noticable until you are using more than 300 feet of hose. As the hose length is increased the resistance of trying to pull the air is increased. The kunkle will allow the system to run at a few inches higher lift than normal. This in turn gives the vacuum more power to pull more CFM through longer hoses. One interesting thing we did with a kunkle-type valve on a TNT is that we ran 950 feet of hose with a 14 inch wand. All the hose was 2 inch. We were cleaning commercial low loop carpet. There was not a tremendous amount of vacuum left, but it was enough to get the job done with the use of a dry stroke.
Mikey P
Administrator
That is one clean set up you got thar Les.
Jay D
Member
les those work just fine, Very similar to the cobb valve except you have the covered style.
Leslie Judson Jones
Member
- Joined
- May 12, 2007
- Messages
- 2,242
Jay DeLaughter said:
JAY
I like this part of your profile,,Country: Texas its bigger than France.
steve frasier
Supportive Member
it is what the machine came with, it is set a 17" but thinking about setting it a little higher to buff the arm muscles
I chose a Kunkle because that was the only valve I had heard of at the time. Rick Freitas had just installed one on his WM and he told me where he purchased his (somewhere back east). This was before Greenie started selling them.
