How to repair a damaged separating diaphragm

[NoJo]

Duller Thread

How to repair a damaged separating diaphragm in a combination boiler


The vessel has a flexible neopren (synthetic rub-ber)
diaphragm inside separating the water and Nitrogen.
The nitrogen
is pre charged at about 0.7 to 1 bar is on one
side of the vessel. When the water in the system
is heated it will expand and the diaphragm is
forced out of shape into pressurized part of the
vessel to accommodate the increased volume of
water.

Measure and check with manufacture's instructions
the pressure in the vessel at its nipple using the pressure
gauge.
To measure the vessel pressure, first isolate the boiler
by closing the flow and return valves at the boiler. Drain
it by the pressure relief valve. Then fit a suitable gauge to
the nipple at the vessel. It should read between 0.5 to 1
bar depending on maker's instructions. A car foot pump
and gauge can be used if it needs to be re-pressurised.
You must make sure the pressure on the boiler
gauge is steady when the system is finally warmed up. It
must be between 1 and 1.75 bar on the gauge.
If the pressure loss becomes very frequent it indicates the
diaphragm is damaged. The vessel need to be changed. It
may be possible to find a replacement for the nipple
valve.

 

[NoJo]

5B01 Analog Signal Conditioning Rack Interrupt Configuration

SHARED INTERRUPTS
•Sources are tri-statable, totem-pole drivers with the input tied high
•Interrupt controller is set to level trigger mode
•The CPU has a 4.7K pull-up resistor on each IRQ line to prevent stray interrupts
on unused inputs. Unused IRQ lines assume a high state.
•Each source has a 1K pull-down resistor tied to the IRQ line through a series
jumper. Only one shared device per IRQ line should have the jumper installed.
The pull-down resistor fights against the 4.7K pull-up resistor on the CPU, but
the 1K wins, causing the IRQ line to assume a low state.
•Interrupts are requested by enabling the tri-state driver. This drives the IRQ line
from low-to-high.
•The source must work against the pull-down resistor
•Multiple sources are allowed per IRQ line. Software must distinguish which
device made the interrupt request by polling the hardware within the Interrupt
Service Routine.
•When not requesting an interrupt, the tri-statable driver must be disabled. This
leaves the IRQ line in a low state, allowing other sources on the same IRQ line
to make requests of their own.

 

[Guest]

Wait, I still need to adjust my nipple valves.

slowly, Perdita

 

[NoJo]

http://www.darrenbarefoot.com/techdocs/collar.jpg

 

[NoJo]

Dunn's Stores DS#781B115 Butcher's Trolley

Assembly Procedure:
1. Be tights part E with part I together by fitting M. Also can be installation handle part J in this side.

2. Be tights part D with part H together by fitting M. Like a step No. 1. And may be installation handle in this side too.

- Use corner fitting to be holds the Bottle rack.

3. To connects the both side legs with Back frame part G. Then ware Wire tray along the position itself and tighten each corner.

4. Assemble wood top with drawer divider. And bring part from Step No. 3 turn around to back of wood top (from picture) then tights wood top with housing and ware all casters to position.

Be CAREFUL top wood face!

When this step finished turn around it again.

5. Input the Drawers.

6. Test stranger & use on.

 

[gauchecritic]

Re: Dunn's Stores DS#781B115 Butcher's Trolley

6. Test stranger & use on.

My mum says I can't talk to strangers, can I test family members or friends & use on instead?

Gauche

 

[A7inchPhildo]

Nice joe, but you for got a very important step here. One must shut off the flow before starting.

Safety Shut-Off Valves:

1) Type: Motorized-opening, spring closing, controlled by burner control system. Two 2-way valves required on No. 2 oil service; one 3-way and one 2-way required on heated oil service.

2) Service: Provide open-shut control of fuel flow to burner. Valves shall shut bubble-tight and be suitable for operation with upstream pressure exceeding upstream safety relief valve set pressure plus accumulation. Temperature rating 250 °F on heated oil service.

3) Performance: Timed opening to safely and smoothly ignite oil burner, one-second closure.

4) Construction: Threaded ends, valve position indicator visible from front of boiler. Closed valve interlock switch on each valve.

5) Approval: FM approved, UL listed for burner service.

6) Manufacturer: ASCO General Controls or equal.

7) Provide 9.5 mm (3/8 inch) relief valve on piping between safety shut-off valves, 1375 kPa (200 psi) rating, tight shut-off. Set pressure lower than pressure rating of safety shut-off valves. Provide valved leak-test connections between the two safety shut off valves and after the second safety shut off valve.

 

[Guest]

Re: Re: Dunn's Stores DS#781B115 Butcher's Trolley

My mum says I can't talk to strangers, can I test family members or friends & use on instead?

Sounds like incest to me (given the insularity of Yorkshire your friends are probably related to you).

Perdita

 

[A7inchPhildo]

Boiler Steam Safety Valves:

1. Test each valve set pressure and blowdown pressure with boiler steam pressure. Perform accumulation test to verify that safety valves have sufficient capacity to relieve full boiler output at maximum firing rate.

2. Popping Tolerance: Plus or minus three percent of set pressure for set pressures over 480 kPa (70 psi).

3. Blowdown Tolerance: Reset at not less than six percent below set pressure of valve. Minimum blowdown two percent of the set pressure.

4. Make repairs and adjustments in manner approved by ASME Boiler and Pressure Vessel Code. Retest valves after completion of repairs and adjustments.

E. Burner Management Control (Flame Safeguard) System:

1. Demonstrate operation of all control, interlock and indicating functions

Er! that is another lesson all together.

 

[CharleyH]

Saw my bother use duct tape on his shoes once. Thought that would work? *shrug*

 

[pop_54]

Yeppers

But don't forget to fully tighten the Cam shaft sprocket and ensure that the Ball race is liberally packed with lubricant before insertion.

I always thought a Ball race was a cat with a ten yard start on the Vet.

 

[A7inchPhildo]

Re: Yeppers

But don't forget to fully tighten the Cam shaft sprocket and ensure that the Ball race is liberally packed with lubricant before insertion.

I always thought a Ball race was a cat with a ten yard start on the Vet.

It is those dam needle barings! You get all set up with plenty of lube to slam the shaft into its perspective opening. And one of those little pricks always beats you to the slot blocking your entry.

Now you got to pull out and set up the moment all over again.

 

[pop_54]

Re: Re: Yeppers

It is those dam needle barings! You get all set up with plenty of lube to slam the shaft into its perspective opening. And one of those little pricks always beats you to the slot blocking your entry.

Now you got to pull out and set up the moment all over again.

Specially the tapered one's with a locking Ring and raised collar.

 

[MathGirl]

Dear SJoe,
I can see from the drawing that the mortise flange rebate is poorly designed. Perhaps cutting a simple rabbet would suffice.
MG

 

[pop_54]

Oi!!!!!

Dear SJoe,
I can see from the drawing that the mortise flange rebate is poorly designed. Perhaps cutting a simple rabbet would suffice.
MG

Don't let perdita hear you saying that about cutting Rabbets young lady.

 

[Guest]

Re: Yeppers

. . .I always thought a Ball race was a cat with a ten yard start on the Vet.

*giggle*

 

[snooper]

Hell - why bother.

If a diaphragm is damaged, just throw it away and buy another. Use some other form of contraception until you get the new one.



<Mumbles>That's the trouble with the AH. Everyone wants to over-complicate simple things.